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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 | |
085afe36 LP |
127 | unit_cgroup_context_init_defaults(u, &s->cgroup_context); |
128 | ||
6b1dc2bd | 129 | s->parameters_proc_swaps.priority = s->parameters_fragment.priority = -1; |
e04aad61 | 130 | |
e1770af8 | 131 | s->control_command_id = _SWAP_EXEC_COMMAND_INVALID; |
c8f4d764 | 132 | |
5bcb0f2b | 133 | u->ignore_on_isolate = true; |
e04aad61 LP |
134 | } |
135 | ||
136 | static void swap_unwatch_control_pid(Swap *s) { | |
137 | assert(s); | |
138 | ||
139 | if (s->control_pid <= 0) | |
140 | return; | |
141 | ||
142 | unit_unwatch_pid(UNIT(s), s->control_pid); | |
143 | s->control_pid = 0; | |
6e620bec LP |
144 | } |
145 | ||
4e85aff4 LP |
146 | static void swap_done(Unit *u) { |
147 | Swap *s = SWAP(u); | |
07b0b134 | 148 | |
4e85aff4 | 149 | assert(s); |
07b0b134 | 150 | |
e04aad61 | 151 | swap_unset_proc_swaps(s); |
9670d583 | 152 | swap_set_devnode(s, NULL); |
e04aad61 | 153 | |
4e85aff4 | 154 | free(s->what); |
e04aad61 LP |
155 | s->what = NULL; |
156 | ||
4e85aff4 | 157 | free(s->parameters_fragment.what); |
6b1dc2bd | 158 | s->parameters_fragment.what = NULL; |
e04aad61 | 159 | |
613b411c LP |
160 | cgroup_context_done(&s->cgroup_context); |
161 | exec_context_done(&s->exec_context); | |
162 | s->exec_runtime = exec_runtime_unref(s->exec_runtime); | |
e04aad61 LP |
163 | exec_command_done_array(s->exec_command, _SWAP_EXEC_COMMAND_MAX); |
164 | s->control_command = NULL; | |
165 | ||
166 | swap_unwatch_control_pid(s); | |
167 | ||
718db961 LP |
168 | s->timer_event_source = sd_event_source_unref(s->timer_event_source); |
169 | } | |
170 | ||
171 | static int swap_arm_timer(Swap *s) { | |
172 | int r; | |
173 | ||
174 | assert(s); | |
175 | ||
176 | if (s->timeout_usec <= 0) { | |
177 | s->timer_event_source = sd_event_source_unref(s->timer_event_source); | |
178 | return 0; | |
179 | } | |
180 | ||
181 | if (s->timer_event_source) { | |
182 | r = sd_event_source_set_time(s->timer_event_source, now(CLOCK_MONOTONIC) + s->timeout_usec); | |
183 | if (r < 0) | |
184 | return r; | |
185 | ||
186 | return sd_event_source_set_enabled(s->timer_event_source, SD_EVENT_ONESHOT); | |
187 | } | |
188 | ||
151b9b96 | 189 | return sd_event_add_monotonic(UNIT(s)->manager->event, &s->timer_event_source, now(CLOCK_MONOTONIC) + s->timeout_usec, 0, swap_dispatch_timer, s); |
07b0b134 ML |
190 | } |
191 | ||
173a8d04 LP |
192 | static int swap_add_device_links(Swap *s) { |
193 | SwapParameters *p; | |
194 | ||
195 | assert(s); | |
196 | ||
197 | if (!s->what) | |
198 | return 0; | |
199 | ||
200 | if (s->from_fragment) | |
201 | p = &s->parameters_fragment; | |
173a8d04 LP |
202 | else |
203 | return 0; | |
204 | ||
cfcfd4ae | 205 | if (is_device_path(s->what)) |
5bcb0f2b | 206 | return unit_add_node_link(UNIT(s), s->what, !p->noauto && UNIT(s)->manager->running_as == SYSTEMD_SYSTEM); |
cfcfd4ae LP |
207 | else |
208 | /* File based swap devices need to be ordered after | |
2b93b027 | 209 | * systemd-remount-fs.service, since they might need a |
cfcfd4ae | 210 | * writable file system. */ |
2b93b027 | 211 | return unit_add_dependency_by_name(UNIT(s), UNIT_AFTER, SPECIAL_REMOUNT_FS_SERVICE, NULL, true); |
173a8d04 LP |
212 | } |
213 | ||
2edd4434 | 214 | static int swap_add_default_dependencies(Swap *s) { |
64347fc2 | 215 | bool nofail = false, noauto = false; |
2edd4434 LP |
216 | int r; |
217 | ||
218 | assert(s); | |
219 | ||
67445f4e | 220 | if (UNIT(s)->manager->running_as != SYSTEMD_SYSTEM) |
6b1dc2bd | 221 | return 0; |
2edd4434 | 222 | |
c0387ebf LP |
223 | if (detect_container(NULL) > 0) |
224 | return 0; | |
225 | ||
6b1dc2bd LP |
226 | r = unit_add_two_dependencies_by_name(UNIT(s), UNIT_BEFORE, UNIT_CONFLICTS, SPECIAL_UMOUNT_TARGET, NULL, true); |
227 | if (r < 0) | |
228 | return r; | |
2edd4434 | 229 | |
64347fc2 TG |
230 | if (s->from_fragment) { |
231 | SwapParameters *p = &s->parameters_fragment; | |
232 | ||
233 | nofail = p->nofail; | |
234 | noauto = p->noauto; | |
235 | } | |
236 | ||
237 | if (!noauto) { | |
4e82fe52 | 238 | if (nofail) |
5bcb0f2b | 239 | r = unit_add_dependency_by_name_inverse(UNIT(s), UNIT_WANTS, SPECIAL_SWAP_TARGET, NULL, true); |
4e82fe52 | 240 | else |
5bcb0f2b | 241 | r = unit_add_two_dependencies_by_name_inverse(UNIT(s), UNIT_AFTER, UNIT_REQUIRES, SPECIAL_SWAP_TARGET, NULL, true); |
64347fc2 TG |
242 | if (r < 0) |
243 | return r; | |
244 | } | |
245 | ||
2edd4434 LP |
246 | return 0; |
247 | } | |
248 | ||
4e85aff4 LP |
249 | static int swap_verify(Swap *s) { |
250 | bool b; | |
7fd1b19b | 251 | _cleanup_free_ char *e = NULL; |
4e85aff4 | 252 | |
1124fe6f | 253 | if (UNIT(s)->load_state != UNIT_LOADED) |
5bcb0f2b | 254 | return 0; |
4e85aff4 | 255 | |
170ca19e | 256 | e = unit_name_from_path(s->what, ".swap"); |
5bcb0f2b | 257 | if (!e) |
170ca19e | 258 | return log_oom(); |
4e85aff4 LP |
259 | |
260 | b = unit_has_name(UNIT(s), e); | |
4e85aff4 | 261 | if (!b) { |
5bcb0f2b | 262 | log_error_unit(UNIT(s)->id, "%s: Value of \"What\" and unit name do not match, not loading.", UNIT(s)->id); |
4e85aff4 LP |
263 | return -EINVAL; |
264 | } | |
265 | ||
4819ff03 | 266 | if (s->exec_context.pam_name && s->kill_context.kill_mode != KILL_CONTROL_GROUP) { |
5bcb0f2b | 267 | 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 |
268 | return -EINVAL; |
269 | } | |
270 | ||
4e85aff4 LP |
271 | return 0; |
272 | } | |
273 | ||
9670d583 LP |
274 | static int swap_load_devnode(Swap *s) { |
275 | _cleanup_udev_device_unref_ struct udev_device *d = NULL; | |
276 | struct stat st; | |
277 | const char *p; | |
278 | ||
279 | assert(s); | |
280 | ||
281 | if (stat(s->what, &st) < 0 || !S_ISBLK(st.st_mode)) | |
282 | return 0; | |
283 | ||
284 | d = udev_device_new_from_devnum(UNIT(s)->manager->udev, 'b', st.st_rdev); | |
285 | if (!d) | |
286 | return 0; | |
287 | ||
288 | p = udev_device_get_devnode(d); | |
289 | if (!p) | |
290 | return 0; | |
291 | ||
292 | return swap_set_devnode(s, p); | |
293 | } | |
294 | ||
07b0b134 ML |
295 | static int swap_load(Unit *u) { |
296 | int r; | |
297 | Swap *s = SWAP(u); | |
298 | ||
299 | assert(s); | |
ac155bb8 | 300 | assert(u->load_state == UNIT_STUB); |
07b0b134 ML |
301 | |
302 | /* Load a .swap file */ | |
646134dc ZJS |
303 | r = unit_load_fragment_and_dropin_optional(u); |
304 | if (r < 0) | |
07b0b134 ML |
305 | return r; |
306 | ||
ac155bb8 | 307 | if (u->load_state == UNIT_LOADED) { |
646134dc ZJS |
308 | r = unit_add_exec_dependencies(u, &s->exec_context); |
309 | if (r < 0) | |
27abbe82 | 310 | return r; |
4e85aff4 | 311 | |
1124fe6f | 312 | if (UNIT(s)->fragment_path) |
4e85aff4 LP |
313 | s->from_fragment = true; |
314 | ||
315 | if (!s->what) { | |
316 | if (s->parameters_fragment.what) | |
317 | s->what = strdup(s->parameters_fragment.what); | |
4e85aff4 LP |
318 | else if (s->parameters_proc_swaps.what) |
319 | s->what = strdup(s->parameters_proc_swaps.what); | |
320 | else | |
ac155bb8 | 321 | s->what = unit_name_to_path(u->id); |
4e85aff4 LP |
322 | |
323 | if (!s->what) | |
07b0b134 | 324 | return -ENOMEM; |
4e85aff4 | 325 | } |
07b0b134 ML |
326 | |
327 | path_kill_slashes(s->what); | |
328 | ||
5bcb0f2b LP |
329 | if (!UNIT(s)->description) { |
330 | r = unit_set_description(u, s->what); | |
331 | if (r < 0) | |
4e85aff4 | 332 | return r; |
5bcb0f2b | 333 | } |
4e85aff4 | 334 | |
a57f7e2c | 335 | r = unit_require_mounts_for(UNIT(s), s->what); |
646134dc | 336 | if (r < 0) |
07b0b134 ML |
337 | return r; |
338 | ||
a57f7e2c | 339 | r = swap_add_device_links(s); |
646134dc | 340 | if (r < 0) |
6e2ef85b | 341 | return r; |
07b0b134 | 342 | |
9670d583 LP |
343 | r = swap_load_devnode(s); |
344 | if (r < 0) | |
345 | return r; | |
346 | ||
a016b922 LP |
347 | r = unit_add_default_slice(u); |
348 | if (r < 0) | |
349 | return r; | |
350 | ||
646134dc ZJS |
351 | if (UNIT(s)->default_dependencies) { |
352 | r = swap_add_default_dependencies(s); | |
353 | if (r < 0) | |
2edd4434 | 354 | return r; |
646134dc | 355 | } |
e06c73cc | 356 | |
085afe36 | 357 | r = unit_exec_context_patch_defaults(u, &s->exec_context); |
e06c73cc LP |
358 | if (r < 0) |
359 | return r; | |
07b0b134 ML |
360 | } |
361 | ||
362 | return swap_verify(s); | |
363 | } | |
364 | ||
6b1dc2bd | 365 | static int swap_add_one( |
4e85aff4 LP |
366 | Manager *m, |
367 | const char *what, | |
e04aad61 | 368 | const char *what_proc_swaps, |
4e85aff4 LP |
369 | int priority, |
370 | bool noauto, | |
173a8d04 | 371 | bool nofail, |
e04aad61 LP |
372 | bool set_flags) { |
373 | ||
7fd1b19b | 374 | _cleanup_free_ char *e = NULL; |
2c7c6144 | 375 | bool delete = false; |
5bcb0f2b | 376 | Unit *u = NULL; |
07b0b134 | 377 | int r; |
4e85aff4 LP |
378 | SwapParameters *p; |
379 | ||
380 | assert(m); | |
381 | assert(what); | |
6b1dc2bd | 382 | assert(what_proc_swaps); |
07b0b134 | 383 | |
7d17cfbc MS |
384 | e = unit_name_from_path(what, ".swap"); |
385 | if (!e) | |
170ca19e | 386 | return log_oom(); |
07b0b134 | 387 | |
e04aad61 LP |
388 | u = manager_get_unit(m, e); |
389 | ||
6b1dc2bd | 390 | if (u && |
e04aad61 LP |
391 | SWAP(u)->from_proc_swaps && |
392 | !path_equal(SWAP(u)->parameters_proc_swaps.what, what_proc_swaps)) | |
393 | return -EEXIST; | |
4e85aff4 LP |
394 | |
395 | if (!u) { | |
07b0b134 ML |
396 | delete = true; |
397 | ||
7d17cfbc | 398 | u = unit_new(m, sizeof(Swap)); |
170ca19e ZJS |
399 | if (!u) |
400 | return log_oom(); | |
e04aad61 | 401 | |
7d17cfbc MS |
402 | r = unit_add_name(u, e); |
403 | if (r < 0) | |
e04aad61 LP |
404 | goto fail; |
405 | ||
7d17cfbc MS |
406 | SWAP(u)->what = strdup(what); |
407 | if (!SWAP(u)->what) { | |
646134dc | 408 | r = log_oom(); |
e04aad61 LP |
409 | goto fail; |
410 | } | |
411 | ||
412 | unit_add_to_load_queue(u); | |
4e85aff4 LP |
413 | } else |
414 | delete = false; | |
07b0b134 | 415 | |
6b1dc2bd | 416 | p = &SWAP(u)->parameters_proc_swaps; |
07b0b134 | 417 | |
6b1dc2bd | 418 | if (!p->what) { |
5bcb0f2b LP |
419 | p->what = strdup(what_proc_swaps); |
420 | if (!p->what) { | |
421 | r = -ENOMEM; | |
6b1dc2bd LP |
422 | goto fail; |
423 | } | |
6b1dc2bd | 424 | } |
e04aad61 | 425 | |
6b1dc2bd LP |
426 | if (set_flags) { |
427 | SWAP(u)->is_active = true; | |
428 | SWAP(u)->just_activated = !SWAP(u)->from_proc_swaps; | |
4e85aff4 | 429 | } |
07b0b134 | 430 | |
6b1dc2bd LP |
431 | SWAP(u)->from_proc_swaps = true; |
432 | ||
4e85aff4 LP |
433 | p->priority = priority; |
434 | p->noauto = noauto; | |
173a8d04 | 435 | p->nofail = nofail; |
07b0b134 | 436 | |
4e85aff4 | 437 | unit_add_to_dbus_queue(u); |
07b0b134 | 438 | |
07b0b134 ML |
439 | return 0; |
440 | ||
441 | fail: | |
66870f90 | 442 | log_warning_unit(e, "Failed to load swap unit: %s", strerror(-r)); |
e04aad61 | 443 | |
4e85aff4 | 444 | if (delete && u) |
07b0b134 ML |
445 | unit_free(u); |
446 | ||
4e85aff4 | 447 | return r; |
07b0b134 ML |
448 | } |
449 | ||
e04aad61 | 450 | static int swap_process_new_swap(Manager *m, const char *device, int prio, bool set_flags) { |
5bcb0f2b LP |
451 | _cleanup_udev_device_unref_ struct udev_device *d = NULL; |
452 | struct udev_list_entry *item = NULL, *first = NULL; | |
453 | const char *dn; | |
e04aad61 | 454 | struct stat st; |
5bcb0f2b | 455 | int r; |
e04aad61 LP |
456 | |
457 | assert(m); | |
458 | ||
5bcb0f2b LP |
459 | r = swap_add_one(m, device, device, prio, false, false, set_flags); |
460 | if (r < 0) | |
461 | return r; | |
e04aad61 | 462 | |
5bcb0f2b LP |
463 | /* If this is a block device, then let's add duplicates for |
464 | * all other names of this block device */ | |
465 | if (stat(device, &st) < 0 || !S_ISBLK(st.st_mode)) | |
466 | return 0; | |
e04aad61 | 467 | |
5bcb0f2b LP |
468 | d = udev_device_new_from_devnum(m->udev, 'b', st.st_rdev); |
469 | if (!d) | |
470 | return 0; | |
e04aad61 | 471 | |
5bcb0f2b LP |
472 | /* Add the main device node */ |
473 | dn = udev_device_get_devnode(d); | |
474 | if (dn && !streq(dn, device)) | |
475 | swap_add_one(m, dn, device, prio, false, false, set_flags); | |
e04aad61 | 476 | |
5bcb0f2b LP |
477 | /* Add additional units for all symlinks */ |
478 | first = udev_device_get_devlinks_list_entry(d); | |
479 | udev_list_entry_foreach(item, first) { | |
480 | const char *p; | |
e04aad61 | 481 | |
5bcb0f2b LP |
482 | /* Don't bother with the /dev/block links */ |
483 | p = udev_list_entry_get_name(item); | |
e04aad61 | 484 | |
5bcb0f2b LP |
485 | if (streq(p, device)) |
486 | continue; | |
e04aad61 | 487 | |
5bcb0f2b LP |
488 | if (path_startswith(p, "/dev/block/")) |
489 | continue; | |
e04aad61 | 490 | |
5bcb0f2b LP |
491 | if (stat(p, &st) >= 0) |
492 | if (!S_ISBLK(st.st_mode) || | |
493 | st.st_rdev != udev_device_get_devnum(d)) | |
494 | continue; | |
e04aad61 | 495 | |
5bcb0f2b | 496 | swap_add_one(m, p, device, prio, false, false, set_flags); |
e04aad61 LP |
497 | } |
498 | ||
e04aad61 LP |
499 | return r; |
500 | } | |
501 | ||
07b0b134 ML |
502 | static void swap_set_state(Swap *s, SwapState state) { |
503 | SwapState old_state; | |
e04aad61 | 504 | |
07b0b134 ML |
505 | assert(s); |
506 | ||
507 | old_state = s->state; | |
508 | s->state = state; | |
509 | ||
e04aad61 LP |
510 | if (state != SWAP_ACTIVATING && |
511 | state != SWAP_ACTIVATING_SIGTERM && | |
512 | state != SWAP_ACTIVATING_SIGKILL && | |
5bcb0f2b | 513 | state != SWAP_ACTIVATING_DONE && |
e04aad61 LP |
514 | state != SWAP_DEACTIVATING && |
515 | state != SWAP_DEACTIVATING_SIGTERM && | |
516 | state != SWAP_DEACTIVATING_SIGKILL) { | |
718db961 | 517 | s->timer_event_source = sd_event_source_unref(s->timer_event_source); |
e04aad61 LP |
518 | swap_unwatch_control_pid(s); |
519 | s->control_command = NULL; | |
520 | s->control_command_id = _SWAP_EXEC_COMMAND_INVALID; | |
521 | } | |
522 | ||
07b0b134 | 523 | if (state != old_state) |
66870f90 ZJS |
524 | log_debug_unit(UNIT(s)->id, |
525 | "%s changed %s -> %s", | |
526 | UNIT(s)->id, | |
527 | swap_state_to_string(old_state), | |
528 | swap_state_to_string(state)); | |
07b0b134 | 529 | |
5bcb0f2b | 530 | unit_notify(UNIT(s), state_translation_table[old_state], state_translation_table[state], true); |
07b0b134 ML |
531 | } |
532 | ||
533 | static int swap_coldplug(Unit *u) { | |
534 | Swap *s = SWAP(u); | |
535 | SwapState new_state = SWAP_DEAD; | |
e04aad61 | 536 | int r; |
07b0b134 ML |
537 | |
538 | assert(s); | |
539 | assert(s->state == SWAP_DEAD); | |
540 | ||
541 | if (s->deserialized_state != s->state) | |
542 | new_state = s->deserialized_state; | |
4e85aff4 | 543 | else if (s->from_proc_swaps) |
07b0b134 ML |
544 | new_state = SWAP_ACTIVE; |
545 | ||
5bcb0f2b LP |
546 | if (new_state == s->state) |
547 | return 0; | |
e04aad61 | 548 | |
5bcb0f2b LP |
549 | if (new_state == SWAP_ACTIVATING || |
550 | new_state == SWAP_ACTIVATING_SIGTERM || | |
551 | new_state == SWAP_ACTIVATING_SIGKILL || | |
552 | new_state == SWAP_ACTIVATING_DONE || | |
553 | new_state == SWAP_DEACTIVATING || | |
554 | new_state == SWAP_DEACTIVATING_SIGTERM || | |
555 | new_state == SWAP_DEACTIVATING_SIGKILL) { | |
e04aad61 | 556 | |
5bcb0f2b LP |
557 | if (s->control_pid <= 0) |
558 | return -EBADMSG; | |
e04aad61 | 559 | |
5bcb0f2b LP |
560 | r = unit_watch_pid(UNIT(s), s->control_pid); |
561 | if (r < 0) | |
562 | return r; | |
e04aad61 | 563 | |
5bcb0f2b LP |
564 | r = swap_arm_timer(s); |
565 | if (r < 0) | |
566 | return r; | |
e04aad61 | 567 | } |
07b0b134 | 568 | |
5bcb0f2b | 569 | swap_set_state(s, new_state); |
07b0b134 ML |
570 | return 0; |
571 | } | |
572 | ||
573 | static void swap_dump(Unit *u, FILE *f, const char *prefix) { | |
574 | Swap *s = SWAP(u); | |
4e85aff4 | 575 | SwapParameters *p; |
07b0b134 ML |
576 | |
577 | assert(s); | |
4e85aff4 LP |
578 | assert(f); |
579 | ||
580 | if (s->from_proc_swaps) | |
581 | p = &s->parameters_proc_swaps; | |
582 | else if (s->from_fragment) | |
583 | p = &s->parameters_fragment; | |
b6bfc7bb LP |
584 | else |
585 | p = NULL; | |
07b0b134 ML |
586 | |
587 | fprintf(f, | |
4e85aff4 | 588 | "%sSwap State: %s\n" |
e1770af8 | 589 | "%sResult: %s\n" |
07b0b134 | 590 | "%sWhat: %s\n" |
4e85aff4 LP |
591 | "%sFrom /proc/swaps: %s\n" |
592 | "%sFrom fragment: %s\n", | |
07b0b134 | 593 | prefix, swap_state_to_string(s->state), |
e1770af8 | 594 | prefix, swap_result_to_string(s->result), |
07b0b134 | 595 | prefix, s->what, |
4e85aff4 LP |
596 | prefix, yes_no(s->from_proc_swaps), |
597 | prefix, yes_no(s->from_fragment)); | |
e04aad61 | 598 | |
9670d583 LP |
599 | if (s->devnode) |
600 | fprintf(f, "%sDevice Node: %s\n", prefix, s->devnode); | |
601 | ||
b6bfc7bb LP |
602 | if (p) |
603 | fprintf(f, | |
604 | "%sPriority: %i\n" | |
605 | "%sNoAuto: %s\n" | |
606 | "%sNoFail: %s\n", | |
607 | prefix, p->priority, | |
608 | prefix, yes_no(p->noauto), | |
609 | prefix, yes_no(p->nofail)); | |
610 | ||
e04aad61 LP |
611 | if (s->control_pid > 0) |
612 | fprintf(f, | |
613 | "%sControl PID: %lu\n", | |
614 | prefix, (unsigned long) s->control_pid); | |
615 | ||
616 | exec_context_dump(&s->exec_context, f, prefix); | |
4819ff03 | 617 | kill_context_dump(&s->kill_context, f, prefix); |
e04aad61 LP |
618 | } |
619 | ||
620 | static int swap_spawn(Swap *s, ExecCommand *c, pid_t *_pid) { | |
621 | pid_t pid; | |
622 | int r; | |
623 | ||
624 | assert(s); | |
625 | assert(c); | |
626 | assert(_pid); | |
627 | ||
4ad49000 LP |
628 | unit_realize_cgroup(UNIT(s)); |
629 | ||
613b411c LP |
630 | r = unit_setup_exec_runtime(UNIT(s)); |
631 | if (r < 0) | |
632 | goto fail; | |
633 | ||
718db961 | 634 | r = swap_arm_timer(s); |
646134dc | 635 | if (r < 0) |
e04aad61 LP |
636 | goto fail; |
637 | ||
646134dc ZJS |
638 | r = exec_spawn(c, |
639 | NULL, | |
640 | &s->exec_context, | |
641 | NULL, 0, | |
642 | UNIT(s)->manager->environment, | |
643 | true, | |
644 | true, | |
645 | true, | |
646 | UNIT(s)->manager->confirm_spawn, | |
13b84ec7 | 647 | UNIT(s)->manager->cgroup_supported, |
4ad49000 | 648 | UNIT(s)->cgroup_path, |
e66cf1a3 | 649 | manager_get_runtime_prefix(UNIT(s)->manager), |
646134dc | 650 | UNIT(s)->id, |
09812eb7 | 651 | 0, |
646134dc | 652 | NULL, |
613b411c | 653 | s->exec_runtime, |
646134dc ZJS |
654 | &pid); |
655 | if (r < 0) | |
e04aad61 LP |
656 | goto fail; |
657 | ||
646134dc ZJS |
658 | r = unit_watch_pid(UNIT(s), pid); |
659 | if (r < 0) | |
e04aad61 LP |
660 | /* FIXME: we need to do something here */ |
661 | goto fail; | |
662 | ||
663 | *_pid = pid; | |
664 | ||
665 | return 0; | |
666 | ||
667 | fail: | |
718db961 | 668 | s->timer_event_source = sd_event_source_unref(s->timer_event_source); |
e04aad61 LP |
669 | |
670 | return r; | |
07b0b134 ML |
671 | } |
672 | ||
e1770af8 | 673 | static void swap_enter_dead(Swap *s, SwapResult f) { |
07b0b134 ML |
674 | assert(s); |
675 | ||
e1770af8 LP |
676 | if (f != SWAP_SUCCESS) |
677 | s->result = f; | |
e04aad61 | 678 | |
613b411c LP |
679 | exec_runtime_destroy(s->exec_runtime); |
680 | s->exec_runtime = exec_runtime_unref(s->exec_runtime); | |
681 | ||
e66cf1a3 LP |
682 | exec_context_destroy_runtime_directory(&s->exec_context, manager_get_runtime_prefix(UNIT(s)->manager)); |
683 | ||
e1770af8 | 684 | swap_set_state(s, s->result != SWAP_SUCCESS ? SWAP_FAILED : SWAP_DEAD); |
07b0b134 ML |
685 | } |
686 | ||
e1770af8 | 687 | static void swap_enter_active(Swap *s, SwapResult f) { |
e04aad61 LP |
688 | assert(s); |
689 | ||
e1770af8 LP |
690 | if (f != SWAP_SUCCESS) |
691 | s->result = f; | |
e04aad61 LP |
692 | |
693 | swap_set_state(s, SWAP_ACTIVE); | |
694 | } | |
695 | ||
e1770af8 | 696 | static void swap_enter_signal(Swap *s, SwapState state, SwapResult f) { |
07b0b134 ML |
697 | int r; |
698 | ||
699 | assert(s); | |
e04aad61 | 700 | |
e1770af8 LP |
701 | if (f != SWAP_SUCCESS) |
702 | s->result = f; | |
e04aad61 | 703 | |
cd2086fe LP |
704 | r = unit_kill_context( |
705 | UNIT(s), | |
706 | &s->kill_context, | |
707 | state != SWAP_ACTIVATING_SIGTERM && state != SWAP_DEACTIVATING_SIGTERM, | |
708 | -1, | |
709 | s->control_pid, | |
710 | false); | |
711 | if (r < 0) | |
712 | goto fail; | |
e04aad61 | 713 | |
cd2086fe | 714 | if (r > 0) { |
718db961 | 715 | r = swap_arm_timer(s); |
646134dc | 716 | if (r < 0) |
e04aad61 LP |
717 | goto fail; |
718 | ||
719 | swap_set_state(s, state); | |
ac84d1fb LP |
720 | } else if (state == SWAP_ACTIVATING_SIGTERM) |
721 | swap_enter_signal(s, SWAP_ACTIVATING_SIGKILL, SWAP_SUCCESS); | |
722 | else if (state == SWAP_DEACTIVATING_SIGTERM) | |
723 | swap_enter_signal(s, SWAP_DEACTIVATING_SIGKILL, SWAP_SUCCESS); | |
724 | else | |
e1770af8 | 725 | swap_enter_dead(s, SWAP_SUCCESS); |
e04aad61 LP |
726 | |
727 | return; | |
728 | ||
729 | fail: | |
66870f90 ZJS |
730 | log_warning_unit(UNIT(s)->id, |
731 | "%s failed to kill processes: %s", UNIT(s)->id, strerror(-r)); | |
e04aad61 | 732 | |
e1770af8 | 733 | swap_enter_dead(s, SWAP_FAILURE_RESOURCES); |
e04aad61 LP |
734 | } |
735 | ||
736 | static void swap_enter_activating(Swap *s) { | |
737 | int r, priority; | |
738 | ||
739 | assert(s); | |
740 | ||
741 | s->control_command_id = SWAP_EXEC_ACTIVATE; | |
742 | s->control_command = s->exec_command + SWAP_EXEC_ACTIVATE; | |
07b0b134 | 743 | |
4e85aff4 LP |
744 | if (s->from_fragment) |
745 | priority = s->parameters_fragment.priority; | |
e04aad61 LP |
746 | else |
747 | priority = -1; | |
4e85aff4 | 748 | |
e04aad61 | 749 | if (priority >= 0) { |
5bcb0f2b | 750 | char p[DECIMAL_STR_MAX(int)]; |
07b0b134 | 751 | |
5bcb0f2b | 752 | sprintf(p, "%i", priority); |
07b0b134 | 753 | |
e04aad61 LP |
754 | r = exec_command_set( |
755 | s->control_command, | |
756 | "/sbin/swapon", | |
757 | "-p", | |
758 | p, | |
759 | s->what, | |
760 | NULL); | |
761 | } else | |
762 | r = exec_command_set( | |
763 | s->control_command, | |
764 | "/sbin/swapon", | |
765 | s->what, | |
766 | NULL); | |
767 | ||
768 | if (r < 0) | |
769 | goto fail; | |
770 | ||
771 | swap_unwatch_control_pid(s); | |
772 | ||
646134dc ZJS |
773 | r = swap_spawn(s, s->control_command, &s->control_pid); |
774 | if (r < 0) | |
e04aad61 LP |
775 | goto fail; |
776 | ||
777 | swap_set_state(s, SWAP_ACTIVATING); | |
778 | ||
779 | return; | |
780 | ||
781 | fail: | |
66870f90 ZJS |
782 | log_warning_unit(UNIT(s)->id, |
783 | "%s failed to run 'swapon' task: %s", | |
784 | UNIT(s)->id, strerror(-r)); | |
e1770af8 | 785 | swap_enter_dead(s, SWAP_FAILURE_RESOURCES); |
e04aad61 LP |
786 | } |
787 | ||
e1770af8 | 788 | static void swap_enter_deactivating(Swap *s) { |
e04aad61 LP |
789 | int r; |
790 | ||
791 | assert(s); | |
792 | ||
e04aad61 LP |
793 | s->control_command_id = SWAP_EXEC_DEACTIVATE; |
794 | s->control_command = s->exec_command + SWAP_EXEC_DEACTIVATE; | |
795 | ||
646134dc | 796 | r = exec_command_set(s->control_command, |
e04aad61 LP |
797 | "/sbin/swapoff", |
798 | s->what, | |
646134dc ZJS |
799 | NULL); |
800 | if (r < 0) | |
e04aad61 LP |
801 | goto fail; |
802 | ||
803 | swap_unwatch_control_pid(s); | |
804 | ||
646134dc ZJS |
805 | r = swap_spawn(s, s->control_command, &s->control_pid); |
806 | if (r < 0) | |
e04aad61 LP |
807 | goto fail; |
808 | ||
809 | swap_set_state(s, SWAP_DEACTIVATING); | |
810 | ||
811 | return; | |
812 | ||
813 | fail: | |
66870f90 ZJS |
814 | log_warning_unit(UNIT(s)->id, |
815 | "%s failed to run 'swapoff' task: %s", | |
816 | UNIT(s)->id, strerror(-r)); | |
e1770af8 | 817 | swap_enter_active(s, SWAP_FAILURE_RESOURCES); |
e04aad61 LP |
818 | } |
819 | ||
820 | static int swap_start(Unit *u) { | |
821 | Swap *s = SWAP(u); | |
822 | ||
823 | assert(s); | |
824 | ||
825 | /* We cannot fulfill this request right now, try again later | |
826 | * please! */ | |
827 | ||
828 | if (s->state == SWAP_DEACTIVATING || | |
829 | s->state == SWAP_DEACTIVATING_SIGTERM || | |
830 | s->state == SWAP_DEACTIVATING_SIGKILL || | |
831 | s->state == SWAP_ACTIVATING_SIGTERM || | |
832 | s->state == SWAP_ACTIVATING_SIGKILL) | |
833 | return -EAGAIN; | |
834 | ||
835 | if (s->state == SWAP_ACTIVATING) | |
836 | return 0; | |
837 | ||
838 | assert(s->state == SWAP_DEAD || s->state == SWAP_FAILED); | |
839 | ||
a5c3034f LP |
840 | if (detect_container(NULL) > 0) |
841 | return -EPERM; | |
842 | ||
e1770af8 | 843 | s->result = SWAP_SUCCESS; |
e04aad61 | 844 | swap_enter_activating(s); |
07b0b134 ML |
845 | return 0; |
846 | } | |
847 | ||
848 | static int swap_stop(Unit *u) { | |
849 | Swap *s = SWAP(u); | |
07b0b134 ML |
850 | |
851 | assert(s); | |
852 | ||
e04aad61 LP |
853 | if (s->state == SWAP_DEACTIVATING || |
854 | s->state == SWAP_DEACTIVATING_SIGTERM || | |
855 | s->state == SWAP_DEACTIVATING_SIGKILL || | |
856 | s->state == SWAP_ACTIVATING_SIGTERM || | |
857 | s->state == SWAP_ACTIVATING_SIGKILL) | |
858 | return 0; | |
07b0b134 | 859 | |
e04aad61 | 860 | assert(s->state == SWAP_ACTIVATING || |
5bcb0f2b | 861 | s->state == SWAP_ACTIVATING_DONE || |
e04aad61 | 862 | s->state == SWAP_ACTIVE); |
07b0b134 | 863 | |
a5c3034f LP |
864 | if (detect_container(NULL) > 0) |
865 | return -EPERM; | |
866 | ||
e1770af8 | 867 | swap_enter_deactivating(s); |
07b0b134 ML |
868 | return 0; |
869 | } | |
870 | ||
871 | static int swap_serialize(Unit *u, FILE *f, FDSet *fds) { | |
872 | Swap *s = SWAP(u); | |
873 | ||
874 | assert(s); | |
875 | assert(f); | |
876 | assert(fds); | |
877 | ||
878 | unit_serialize_item(u, f, "state", swap_state_to_string(s->state)); | |
e1770af8 | 879 | unit_serialize_item(u, f, "result", swap_result_to_string(s->result)); |
e04aad61 LP |
880 | |
881 | if (s->control_pid > 0) | |
882 | unit_serialize_item_format(u, f, "control-pid", "%lu", (unsigned long) s->control_pid); | |
883 | ||
884 | if (s->control_command_id >= 0) | |
885 | unit_serialize_item(u, f, "control-command", swap_exec_command_to_string(s->control_command_id)); | |
07b0b134 ML |
886 | |
887 | return 0; | |
888 | } | |
889 | ||
890 | static int swap_deserialize_item(Unit *u, const char *key, const char *value, FDSet *fds) { | |
891 | Swap *s = SWAP(u); | |
892 | ||
893 | assert(s); | |
894 | assert(fds); | |
895 | ||
896 | if (streq(key, "state")) { | |
897 | SwapState state; | |
898 | ||
646134dc ZJS |
899 | state = swap_state_from_string(value); |
900 | if (state < 0) | |
66870f90 | 901 | log_debug_unit(u->id, "Failed to parse state value %s", value); |
07b0b134 ML |
902 | else |
903 | s->deserialized_state = state; | |
e1770af8 LP |
904 | } else if (streq(key, "result")) { |
905 | SwapResult f; | |
906 | ||
907 | f = swap_result_from_string(value); | |
908 | if (f < 0) | |
66870f90 | 909 | log_debug_unit(u->id, "Failed to parse result value %s", value); |
e1770af8 LP |
910 | else if (f != SWAP_SUCCESS) |
911 | s->result = f; | |
e04aad61 LP |
912 | } else if (streq(key, "control-pid")) { |
913 | pid_t pid; | |
914 | ||
915 | if (parse_pid(value, &pid) < 0) | |
66870f90 | 916 | log_debug_unit(u->id, "Failed to parse control-pid value %s", value); |
e04aad61 LP |
917 | else |
918 | s->control_pid = pid; | |
919 | ||
920 | } else if (streq(key, "control-command")) { | |
921 | SwapExecCommand id; | |
922 | ||
646134dc ZJS |
923 | id = swap_exec_command_from_string(value); |
924 | if (id < 0) | |
66870f90 | 925 | log_debug_unit(u->id, "Failed to parse exec-command value %s", value); |
e04aad61 LP |
926 | else { |
927 | s->control_command_id = id; | |
928 | s->control_command = s->exec_command + id; | |
929 | } | |
07b0b134 | 930 | } else |
66870f90 | 931 | log_debug_unit(u->id, "Unknown serialization key '%s'", key); |
07b0b134 ML |
932 | |
933 | return 0; | |
934 | } | |
935 | ||
44a6b1b6 | 936 | _pure_ static UnitActiveState swap_active_state(Unit *u) { |
07b0b134 ML |
937 | assert(u); |
938 | ||
939 | return state_translation_table[SWAP(u)->state]; | |
940 | } | |
941 | ||
44a6b1b6 | 942 | _pure_ static const char *swap_sub_state_to_string(Unit *u) { |
07b0b134 ML |
943 | assert(u); |
944 | ||
945 | return swap_state_to_string(SWAP(u)->state); | |
946 | } | |
947 | ||
44a6b1b6 | 948 | _pure_ static bool swap_check_gc(Unit *u) { |
07b0b134 ML |
949 | Swap *s = SWAP(u); |
950 | ||
951 | assert(s); | |
952 | ||
6b1dc2bd | 953 | return s->from_proc_swaps; |
07b0b134 ML |
954 | } |
955 | ||
e04aad61 LP |
956 | static void swap_sigchld_event(Unit *u, pid_t pid, int code, int status) { |
957 | Swap *s = SWAP(u); | |
e1770af8 | 958 | SwapResult f; |
e04aad61 LP |
959 | |
960 | assert(s); | |
961 | assert(pid >= 0); | |
962 | ||
963 | if (pid != s->control_pid) | |
964 | return; | |
965 | ||
966 | s->control_pid = 0; | |
967 | ||
96342de6 | 968 | if (is_clean_exit(code, status, NULL)) |
e1770af8 LP |
969 | f = SWAP_SUCCESS; |
970 | else if (code == CLD_EXITED) | |
971 | f = SWAP_FAILURE_EXIT_CODE; | |
972 | else if (code == CLD_KILLED) | |
973 | f = SWAP_FAILURE_SIGNAL; | |
974 | else if (code == CLD_DUMPED) | |
975 | f = SWAP_FAILURE_CORE_DUMP; | |
976 | else | |
977 | assert_not_reached("Unknown code"); | |
978 | ||
979 | if (f != SWAP_SUCCESS) | |
980 | s->result = f; | |
e04aad61 LP |
981 | |
982 | if (s->control_command) { | |
6ea832a2 | 983 | exec_status_exit(&s->control_command->exec_status, &s->exec_context, pid, code, status); |
e1770af8 | 984 | |
e04aad61 LP |
985 | s->control_command = NULL; |
986 | s->control_command_id = _SWAP_EXEC_COMMAND_INVALID; | |
987 | } | |
988 | ||
66870f90 ZJS |
989 | log_full_unit(f == SWAP_SUCCESS ? LOG_DEBUG : LOG_NOTICE, |
990 | u->id, | |
991 | "%s swap process exited, code=%s status=%i", | |
992 | u->id, sigchld_code_to_string(code), status); | |
e04aad61 LP |
993 | |
994 | switch (s->state) { | |
995 | ||
996 | case SWAP_ACTIVATING: | |
5bcb0f2b | 997 | case SWAP_ACTIVATING_DONE: |
e04aad61 LP |
998 | case SWAP_ACTIVATING_SIGTERM: |
999 | case SWAP_ACTIVATING_SIGKILL: | |
1000 | ||
e1770af8 LP |
1001 | if (f == SWAP_SUCCESS) |
1002 | swap_enter_active(s, f); | |
e04aad61 | 1003 | else |
e1770af8 | 1004 | swap_enter_dead(s, f); |
e04aad61 LP |
1005 | break; |
1006 | ||
1007 | case SWAP_DEACTIVATING: | |
1008 | case SWAP_DEACTIVATING_SIGKILL: | |
1009 | case SWAP_DEACTIVATING_SIGTERM: | |
1010 | ||
7bb01eff | 1011 | swap_enter_dead(s, f); |
e04aad61 LP |
1012 | break; |
1013 | ||
1014 | default: | |
1015 | assert_not_reached("Uh, control process died at wrong time."); | |
1016 | } | |
1017 | ||
1018 | /* Notify clients about changed exit status */ | |
1019 | unit_add_to_dbus_queue(u); | |
e04aad61 LP |
1020 | } |
1021 | ||
718db961 LP |
1022 | static int swap_dispatch_timer(sd_event_source *source, usec_t usec, void *userdata) { |
1023 | Swap *s = SWAP(userdata); | |
e04aad61 LP |
1024 | |
1025 | assert(s); | |
718db961 | 1026 | assert(s->timer_event_source == source); |
e04aad61 LP |
1027 | |
1028 | switch (s->state) { | |
1029 | ||
1030 | case SWAP_ACTIVATING: | |
5bcb0f2b | 1031 | case SWAP_ACTIVATING_DONE: |
718db961 | 1032 | log_warning_unit(UNIT(s)->id, "%s activation timed out. Stopping.", UNIT(s)->id); |
e1770af8 | 1033 | swap_enter_signal(s, SWAP_ACTIVATING_SIGTERM, SWAP_FAILURE_TIMEOUT); |
e04aad61 LP |
1034 | break; |
1035 | ||
1036 | case SWAP_DEACTIVATING: | |
718db961 | 1037 | log_warning_unit(UNIT(s)->id, "%s deactivation timed out. Stopping.", UNIT(s)->id); |
e1770af8 | 1038 | swap_enter_signal(s, SWAP_DEACTIVATING_SIGTERM, SWAP_FAILURE_TIMEOUT); |
e04aad61 LP |
1039 | break; |
1040 | ||
1041 | case SWAP_ACTIVATING_SIGTERM: | |
4819ff03 | 1042 | if (s->kill_context.send_sigkill) { |
718db961 | 1043 | log_warning_unit(UNIT(s)->id, "%s activation timed out. Killing.", UNIT(s)->id); |
e1770af8 | 1044 | swap_enter_signal(s, SWAP_ACTIVATING_SIGKILL, SWAP_FAILURE_TIMEOUT); |
ba035df2 | 1045 | } else { |
718db961 | 1046 | log_warning_unit(UNIT(s)->id, "%s activation timed out. Skipping SIGKILL. Ignoring.", UNIT(s)->id); |
e1770af8 | 1047 | swap_enter_dead(s, SWAP_FAILURE_TIMEOUT); |
ba035df2 | 1048 | } |
e04aad61 LP |
1049 | break; |
1050 | ||
1051 | case SWAP_DEACTIVATING_SIGTERM: | |
4819ff03 | 1052 | if (s->kill_context.send_sigkill) { |
718db961 | 1053 | log_warning_unit(UNIT(s)->id, "%s deactivation timed out. Killing.", UNIT(s)->id); |
e1770af8 | 1054 | swap_enter_signal(s, SWAP_DEACTIVATING_SIGKILL, SWAP_FAILURE_TIMEOUT); |
ba035df2 | 1055 | } else { |
718db961 | 1056 | log_warning_unit(UNIT(s)->id, "%s deactivation timed out. Skipping SIGKILL. Ignoring.", UNIT(s)->id); |
e1770af8 | 1057 | swap_enter_dead(s, SWAP_FAILURE_TIMEOUT); |
ba035df2 | 1058 | } |
e04aad61 LP |
1059 | break; |
1060 | ||
1061 | case SWAP_ACTIVATING_SIGKILL: | |
1062 | case SWAP_DEACTIVATING_SIGKILL: | |
718db961 | 1063 | log_warning_unit(UNIT(s)->id, "%s swap process still around after SIGKILL. Ignoring.", UNIT(s)->id); |
e1770af8 | 1064 | swap_enter_dead(s, SWAP_FAILURE_TIMEOUT); |
e04aad61 LP |
1065 | break; |
1066 | ||
1067 | default: | |
1068 | assert_not_reached("Timeout at wrong time."); | |
1069 | } | |
718db961 LP |
1070 | |
1071 | return 0; | |
e04aad61 LP |
1072 | } |
1073 | ||
1074 | static int swap_load_proc_swaps(Manager *m, bool set_flags) { | |
1075 | unsigned i; | |
1076 | int r = 0; | |
1077 | ||
1078 | assert(m); | |
1079 | ||
07b0b134 | 1080 | rewind(m->proc_swaps); |
bab45044 | 1081 | |
4e85aff4 | 1082 | (void) fscanf(m->proc_swaps, "%*s %*s %*s %*s %*s\n"); |
07b0b134 | 1083 | |
e04aad61 | 1084 | for (i = 1;; i++) { |
9fb3675e | 1085 | _cleanup_free_ char *dev = NULL, *d = NULL; |
07b0b134 ML |
1086 | int prio = 0, k; |
1087 | ||
646134dc ZJS |
1088 | k = fscanf(m->proc_swaps, |
1089 | "%ms " /* device/file */ | |
1090 | "%*s " /* type of swap */ | |
1091 | "%*s " /* swap size */ | |
1092 | "%*s " /* used */ | |
1093 | "%i\n", /* priority */ | |
1094 | &dev, &prio); | |
1095 | if (k != 2) { | |
07b0b134 | 1096 | if (k == EOF) |
4e85aff4 | 1097 | break; |
07b0b134 | 1098 | |
646134dc | 1099 | log_warning("Failed to parse /proc/swaps:%u", i); |
e04aad61 | 1100 | continue; |
07b0b134 | 1101 | } |
07b0b134 | 1102 | |
4e85aff4 | 1103 | d = cunescape(dev); |
4e85aff4 LP |
1104 | if (!d) |
1105 | return -ENOMEM; | |
1106 | ||
e04aad61 | 1107 | k = swap_process_new_swap(m, d, prio, set_flags); |
07b0b134 | 1108 | if (k < 0) |
e04aad61 | 1109 | r = k; |
07b0b134 ML |
1110 | } |
1111 | ||
e04aad61 LP |
1112 | return r; |
1113 | } | |
1114 | ||
718db961 LP |
1115 | static int swap_dispatch_io(sd_event_source *source, int fd, uint32_t revents, void *userdata) { |
1116 | Manager *m = userdata; | |
595ed347 | 1117 | Unit *u; |
4e434314 LP |
1118 | int r; |
1119 | ||
1120 | assert(m); | |
718db961 | 1121 | assert(revents & EPOLLPRI); |
4e434314 | 1122 | |
646134dc ZJS |
1123 | r = swap_load_proc_swaps(m, true); |
1124 | if (r < 0) { | |
e04aad61 LP |
1125 | log_error("Failed to reread /proc/swaps: %s", strerror(-r)); |
1126 | ||
1127 | /* Reset flags, just in case, for late calls */ | |
595ed347 MS |
1128 | LIST_FOREACH(units_by_type, u, m->units_by_type[UNIT_SWAP]) { |
1129 | Swap *swap = SWAP(u); | |
e04aad61 LP |
1130 | |
1131 | swap->is_active = swap->just_activated = false; | |
1132 | } | |
1133 | ||
1134 | return 0; | |
1135 | } | |
1136 | ||
1137 | manager_dispatch_load_queue(m); | |
1138 | ||
595ed347 MS |
1139 | LIST_FOREACH(units_by_type, u, m->units_by_type[UNIT_SWAP]) { |
1140 | Swap *swap = SWAP(u); | |
e04aad61 LP |
1141 | |
1142 | if (!swap->is_active) { | |
1143 | /* This has just been deactivated */ | |
1144 | ||
e04aad61 LP |
1145 | swap_unset_proc_swaps(swap); |
1146 | ||
1147 | switch (swap->state) { | |
1148 | ||
1149 | case SWAP_ACTIVE: | |
e1770af8 | 1150 | swap_enter_dead(swap, SWAP_SUCCESS); |
e04aad61 LP |
1151 | break; |
1152 | ||
1153 | default: | |
5bcb0f2b | 1154 | /* Fire again */ |
e04aad61 LP |
1155 | swap_set_state(swap, swap->state); |
1156 | break; | |
1157 | } | |
1158 | ||
1159 | } else if (swap->just_activated) { | |
1160 | ||
1161 | /* New swap entry */ | |
1162 | ||
1163 | switch (swap->state) { | |
1164 | ||
1165 | case SWAP_DEAD: | |
1166 | case SWAP_FAILED: | |
e1770af8 | 1167 | swap_enter_active(swap, SWAP_SUCCESS); |
e04aad61 LP |
1168 | break; |
1169 | ||
5bcb0f2b LP |
1170 | case SWAP_ACTIVATING: |
1171 | swap_set_state(swap, SWAP_ACTIVATING_DONE); | |
1172 | break; | |
1173 | ||
e04aad61 LP |
1174 | default: |
1175 | /* Nothing really changed, but let's | |
1176 | * issue an notification call | |
1177 | * nonetheless, in case somebody is | |
1178 | * waiting for this. */ | |
1179 | swap_set_state(swap, swap->state); | |
1180 | break; | |
1181 | } | |
1182 | } | |
1183 | ||
1184 | /* Reset the flags for later calls */ | |
1185 | swap->is_active = swap->just_activated = false; | |
1186 | } | |
1187 | ||
1188 | return 1; | |
1189 | } | |
1190 | ||
1191 | static Unit *swap_following(Unit *u) { | |
1192 | Swap *s = SWAP(u); | |
1193 | Swap *other, *first = NULL; | |
1194 | ||
1195 | assert(s); | |
1196 | ||
9670d583 | 1197 | if (streq_ptr(s->what, s->devnode)) |
e04aad61 LP |
1198 | return NULL; |
1199 | ||
1200 | /* Make everybody follow the unit that's named after the swap | |
1201 | * device in the kernel */ | |
1202 | ||
9670d583 LP |
1203 | LIST_FOREACH_AFTER(same_devnode, other, s) |
1204 | if (streq_ptr(other->what, other->devnode)) | |
e04aad61 LP |
1205 | return UNIT(other); |
1206 | ||
9670d583 LP |
1207 | LIST_FOREACH_BEFORE(same_devnode, other, s) { |
1208 | if (streq_ptr(other->what, other->devnode)) | |
e04aad61 LP |
1209 | return UNIT(other); |
1210 | ||
1211 | first = other; | |
1212 | } | |
1213 | ||
1214 | return UNIT(first); | |
07b0b134 ML |
1215 | } |
1216 | ||
6210e7fc | 1217 | static int swap_following_set(Unit *u, Set **_set) { |
5bcb0f2b | 1218 | Swap *s = SWAP(u), *other; |
6210e7fc LP |
1219 | Set *set; |
1220 | int r; | |
1221 | ||
1222 | assert(s); | |
1223 | assert(_set); | |
1224 | ||
9670d583 | 1225 | if (LIST_JUST_US(same_devnode, s)) { |
6210e7fc LP |
1226 | *_set = NULL; |
1227 | return 0; | |
1228 | } | |
1229 | ||
5bcb0f2b LP |
1230 | set = set_new(NULL, NULL); |
1231 | if (!set) | |
6210e7fc LP |
1232 | return -ENOMEM; |
1233 | ||
9670d583 | 1234 | LIST_FOREACH_AFTER(same_devnode, other, s) { |
5bcb0f2b LP |
1235 | r = set_put(set, other); |
1236 | if (r < 0) | |
6210e7fc | 1237 | goto fail; |
5bcb0f2b | 1238 | } |
6210e7fc | 1239 | |
9670d583 | 1240 | LIST_FOREACH_BEFORE(same_devnode, other, s) { |
5bcb0f2b LP |
1241 | r = set_put(set, other); |
1242 | if (r < 0) | |
6210e7fc | 1243 | goto fail; |
5bcb0f2b | 1244 | } |
6210e7fc LP |
1245 | |
1246 | *_set = set; | |
1247 | return 1; | |
1248 | ||
1249 | fail: | |
1250 | set_free(set); | |
1251 | return r; | |
1252 | } | |
1253 | ||
07b0b134 ML |
1254 | static void swap_shutdown(Manager *m) { |
1255 | assert(m); | |
1256 | ||
718db961 LP |
1257 | m->swap_event_source = sd_event_source_unref(m->swap_event_source); |
1258 | ||
07b0b134 ML |
1259 | if (m->proc_swaps) { |
1260 | fclose(m->proc_swaps); | |
1261 | m->proc_swaps = NULL; | |
1262 | } | |
e04aad61 | 1263 | |
9670d583 LP |
1264 | hashmap_free(m->swaps_by_devnode); |
1265 | m->swaps_by_devnode = NULL; | |
07b0b134 ML |
1266 | } |
1267 | ||
07b0b134 ML |
1268 | static int swap_enumerate(Manager *m) { |
1269 | int r; | |
9670d583 | 1270 | |
07b0b134 ML |
1271 | assert(m); |
1272 | ||
4e434314 | 1273 | if (!m->proc_swaps) { |
646134dc ZJS |
1274 | m->proc_swaps = fopen("/proc/swaps", "re"); |
1275 | if (!m->proc_swaps) | |
718db961 | 1276 | return errno == ENOENT ? 0 : -errno; |
4e434314 | 1277 | |
151b9b96 | 1278 | r = sd_event_add_io(m->event, &m->swap_event_source, fileno(m->proc_swaps), EPOLLPRI, swap_dispatch_io, m); |
718db961 | 1279 | if (r < 0) |
29083707 LP |
1280 | goto fail; |
1281 | ||
1282 | /* Dispatch this before we dispatch SIGCHLD, so that | |
1283 | * we always get the events from /proc/swaps before | |
1284 | * the SIGCHLD of /sbin/swapon. */ | |
1285 | r = sd_event_source_set_priority(m->swap_event_source, -10); | |
1286 | if (r < 0) | |
718db961 | 1287 | goto fail; |
4e434314 LP |
1288 | } |
1289 | ||
646134dc ZJS |
1290 | r = swap_load_proc_swaps(m, false); |
1291 | if (r < 0) | |
718db961 LP |
1292 | goto fail; |
1293 | ||
1294 | return 0; | |
07b0b134 | 1295 | |
718db961 LP |
1296 | fail: |
1297 | swap_shutdown(m); | |
07b0b134 ML |
1298 | return r; |
1299 | } | |
1300 | ||
9670d583 LP |
1301 | int swap_process_new_device(Manager *m, struct udev_device *dev) { |
1302 | struct udev_list_entry *item = NULL, *first = NULL; | |
1303 | _cleanup_free_ char *e = NULL; | |
1304 | const char *dn; | |
1305 | Swap *s; | |
1306 | int r = 0; | |
1307 | ||
1308 | assert(m); | |
1309 | assert(dev); | |
1310 | ||
1311 | dn = udev_device_get_devnode(dev); | |
1312 | if (!dn) | |
1313 | return 0; | |
1314 | ||
1315 | e = unit_name_from_path(dn, ".swap"); | |
1316 | if (!e) | |
1317 | return -ENOMEM; | |
1318 | ||
1319 | s = hashmap_get(m->units, e); | |
1320 | if (s) | |
1321 | r = swap_set_devnode(s, dn); | |
1322 | ||
1323 | first = udev_device_get_devlinks_list_entry(dev); | |
1324 | udev_list_entry_foreach(item, first) { | |
1325 | _cleanup_free_ char *n = NULL; | |
1326 | ||
1327 | n = unit_name_from_path(udev_list_entry_get_name(item), ".swap"); | |
1328 | if (!n) | |
1329 | return -ENOMEM; | |
1330 | ||
1331 | s = hashmap_get(m->units, n); | |
1332 | if (s) { | |
1333 | int q; | |
1334 | ||
1335 | q = swap_set_devnode(s, dn); | |
1336 | if (q < 0) | |
1337 | r = q; | |
1338 | } | |
1339 | } | |
1340 | ||
1341 | return r; | |
1342 | } | |
1343 | ||
1344 | int swap_process_removed_device(Manager *m, struct udev_device *dev) { | |
9670d583 LP |
1345 | const char *dn; |
1346 | int r = 0; | |
1347 | Swap *s; | |
1348 | ||
1349 | dn = udev_device_get_devnode(dev); | |
1350 | if (!dn) | |
1351 | return 0; | |
1352 | ||
1353 | while ((s = hashmap_get(m->swaps_by_devnode, dn))) { | |
1354 | int q; | |
1355 | ||
1356 | q = swap_set_devnode(s, NULL); | |
1357 | if (q < 0) | |
1358 | r = q; | |
1359 | } | |
1360 | ||
1361 | return r; | |
1362 | } | |
1363 | ||
fdf20a31 | 1364 | static void swap_reset_failed(Unit *u) { |
5632e374 LP |
1365 | Swap *s = SWAP(u); |
1366 | ||
1367 | assert(s); | |
1368 | ||
fdf20a31 | 1369 | if (s->state == SWAP_FAILED) |
5632e374 | 1370 | swap_set_state(s, SWAP_DEAD); |
e04aad61 | 1371 | |
e1770af8 | 1372 | s->result = SWAP_SUCCESS; |
5632e374 LP |
1373 | } |
1374 | ||
718db961 | 1375 | static int swap_kill(Unit *u, KillWho who, int signo, sd_bus_error *error) { |
814cc562 | 1376 | return unit_kill_common(u, who, signo, -1, SWAP(u)->control_pid, error); |
8a0867d6 LP |
1377 | } |
1378 | ||
68db7a3b ZJS |
1379 | static int swap_get_timeout(Unit *u, uint64_t *timeout) { |
1380 | Swap *s = SWAP(u); | |
1381 | int r; | |
1382 | ||
1383 | if (!s->timer_event_source) | |
1384 | return 0; | |
1385 | ||
1386 | r = sd_event_source_get_time(s->timer_event_source, timeout); | |
1387 | if (r < 0) | |
1388 | return r; | |
1389 | ||
1390 | return 1; | |
1391 | } | |
1392 | ||
5632e374 LP |
1393 | static const char* const swap_state_table[_SWAP_STATE_MAX] = { |
1394 | [SWAP_DEAD] = "dead", | |
e04aad61 | 1395 | [SWAP_ACTIVATING] = "activating", |
5bcb0f2b | 1396 | [SWAP_ACTIVATING_DONE] = "activating-done", |
5632e374 | 1397 | [SWAP_ACTIVE] = "active", |
e04aad61 LP |
1398 | [SWAP_DEACTIVATING] = "deactivating", |
1399 | [SWAP_ACTIVATING_SIGTERM] = "activating-sigterm", | |
1400 | [SWAP_ACTIVATING_SIGKILL] = "activating-sigkill", | |
1401 | [SWAP_DEACTIVATING_SIGTERM] = "deactivating-sigterm", | |
1402 | [SWAP_DEACTIVATING_SIGKILL] = "deactivating-sigkill", | |
fdf20a31 | 1403 | [SWAP_FAILED] = "failed" |
5632e374 LP |
1404 | }; |
1405 | ||
1406 | DEFINE_STRING_TABLE_LOOKUP(swap_state, SwapState); | |
1407 | ||
e04aad61 LP |
1408 | static const char* const swap_exec_command_table[_SWAP_EXEC_COMMAND_MAX] = { |
1409 | [SWAP_EXEC_ACTIVATE] = "ExecActivate", | |
1410 | [SWAP_EXEC_DEACTIVATE] = "ExecDeactivate", | |
1411 | }; | |
1412 | ||
1413 | DEFINE_STRING_TABLE_LOOKUP(swap_exec_command, SwapExecCommand); | |
1414 | ||
e1770af8 LP |
1415 | static const char* const swap_result_table[_SWAP_RESULT_MAX] = { |
1416 | [SWAP_SUCCESS] = "success", | |
1417 | [SWAP_FAILURE_RESOURCES] = "resources", | |
1418 | [SWAP_FAILURE_TIMEOUT] = "timeout", | |
1419 | [SWAP_FAILURE_EXIT_CODE] = "exit-code", | |
1420 | [SWAP_FAILURE_SIGNAL] = "signal", | |
1421 | [SWAP_FAILURE_CORE_DUMP] = "core-dump" | |
1422 | }; | |
1423 | ||
1424 | DEFINE_STRING_TABLE_LOOKUP(swap_result, SwapResult); | |
1425 | ||
07b0b134 | 1426 | const UnitVTable swap_vtable = { |
7d17cfbc | 1427 | .object_size = sizeof(Swap), |
718db961 LP |
1428 | .exec_context_offset = offsetof(Swap, exec_context), |
1429 | .cgroup_context_offset = offsetof(Swap, cgroup_context), | |
1430 | .kill_context_offset = offsetof(Swap, kill_context), | |
613b411c | 1431 | .exec_runtime_offset = offsetof(Swap, exec_runtime), |
3ef63c31 | 1432 | |
f975e971 LP |
1433 | .sections = |
1434 | "Unit\0" | |
1435 | "Swap\0" | |
1436 | "Install\0", | |
4ad49000 | 1437 | .private_section = "Swap", |
71645aca | 1438 | |
e04aad61 | 1439 | .no_alias = true, |
07b0b134 ML |
1440 | .no_instances = true, |
1441 | ||
4e85aff4 | 1442 | .init = swap_init, |
07b0b134 | 1443 | .load = swap_load, |
6e620bec | 1444 | .done = swap_done, |
07b0b134 ML |
1445 | |
1446 | .coldplug = swap_coldplug, | |
1447 | ||
1448 | .dump = swap_dump, | |
1449 | ||
1450 | .start = swap_start, | |
1451 | .stop = swap_stop, | |
1452 | ||
8a0867d6 LP |
1453 | .kill = swap_kill, |
1454 | ||
68db7a3b ZJS |
1455 | .get_timeout = swap_get_timeout, |
1456 | ||
07b0b134 ML |
1457 | .serialize = swap_serialize, |
1458 | .deserialize_item = swap_deserialize_item, | |
1459 | ||
1460 | .active_state = swap_active_state, | |
1461 | .sub_state_to_string = swap_sub_state_to_string, | |
1462 | ||
1463 | .check_gc = swap_check_gc, | |
1464 | ||
e04aad61 | 1465 | .sigchld_event = swap_sigchld_event, |
e04aad61 LP |
1466 | |
1467 | .reset_failed = swap_reset_failed, | |
1468 | ||
c4e2ceae | 1469 | .bus_interface = "org.freedesktop.systemd1.Swap", |
718db961 | 1470 | .bus_vtable = bus_swap_vtable, |
74c964d3 LP |
1471 | .bus_set_property = bus_swap_set_property, |
1472 | .bus_commit_properties = bus_swap_commit_properties, | |
07b0b134 | 1473 | |
e04aad61 | 1474 | .following = swap_following, |
6210e7fc | 1475 | .following_set = swap_following_set, |
5632e374 | 1476 | |
6e620bec | 1477 | .enumerate = swap_enumerate, |
c6918296 MS |
1478 | .shutdown = swap_shutdown, |
1479 | ||
1480 | .status_message_formats = { | |
1481 | .starting_stopping = { | |
1482 | [0] = "Activating swap %s...", | |
1483 | [1] = "Deactivating swap %s...", | |
1484 | }, | |
1485 | .finished_start_job = { | |
1486 | [JOB_DONE] = "Activated swap %s.", | |
1487 | [JOB_FAILED] = "Failed to activate swap %s.", | |
1488 | [JOB_DEPENDENCY] = "Dependency failed for %s.", | |
1489 | [JOB_TIMEOUT] = "Timed out activating swap %s.", | |
1490 | }, | |
1491 | .finished_stop_job = { | |
1492 | [JOB_DONE] = "Deactivated swap %s.", | |
1493 | [JOB_FAILED] = "Failed deactivating swap %s.", | |
1494 | [JOB_TIMEOUT] = "Timed out deactivating swap %s.", | |
1495 | }, | |
1496 | }, | |
07b0b134 | 1497 | }; |