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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, |
646134dc | 649 | UNIT(s)->id, |
09812eb7 | 650 | 0, |
646134dc | 651 | NULL, |
613b411c | 652 | s->exec_runtime, |
646134dc ZJS |
653 | &pid); |
654 | if (r < 0) | |
e04aad61 LP |
655 | goto fail; |
656 | ||
646134dc ZJS |
657 | r = unit_watch_pid(UNIT(s), pid); |
658 | if (r < 0) | |
e04aad61 LP |
659 | /* FIXME: we need to do something here */ |
660 | goto fail; | |
661 | ||
662 | *_pid = pid; | |
663 | ||
664 | return 0; | |
665 | ||
666 | fail: | |
718db961 | 667 | s->timer_event_source = sd_event_source_unref(s->timer_event_source); |
e04aad61 LP |
668 | |
669 | return r; | |
07b0b134 ML |
670 | } |
671 | ||
e1770af8 | 672 | static void swap_enter_dead(Swap *s, SwapResult f) { |
07b0b134 ML |
673 | assert(s); |
674 | ||
e1770af8 LP |
675 | if (f != SWAP_SUCCESS) |
676 | s->result = f; | |
e04aad61 | 677 | |
613b411c LP |
678 | exec_runtime_destroy(s->exec_runtime); |
679 | s->exec_runtime = exec_runtime_unref(s->exec_runtime); | |
680 | ||
e1770af8 | 681 | swap_set_state(s, s->result != SWAP_SUCCESS ? SWAP_FAILED : SWAP_DEAD); |
07b0b134 ML |
682 | } |
683 | ||
e1770af8 | 684 | static void swap_enter_active(Swap *s, SwapResult f) { |
e04aad61 LP |
685 | assert(s); |
686 | ||
e1770af8 LP |
687 | if (f != SWAP_SUCCESS) |
688 | s->result = f; | |
e04aad61 LP |
689 | |
690 | swap_set_state(s, SWAP_ACTIVE); | |
691 | } | |
692 | ||
e1770af8 | 693 | static void swap_enter_signal(Swap *s, SwapState state, SwapResult f) { |
07b0b134 ML |
694 | int r; |
695 | ||
696 | assert(s); | |
e04aad61 | 697 | |
e1770af8 LP |
698 | if (f != SWAP_SUCCESS) |
699 | s->result = f; | |
e04aad61 | 700 | |
cd2086fe LP |
701 | r = unit_kill_context( |
702 | UNIT(s), | |
703 | &s->kill_context, | |
704 | state != SWAP_ACTIVATING_SIGTERM && state != SWAP_DEACTIVATING_SIGTERM, | |
705 | -1, | |
706 | s->control_pid, | |
707 | false); | |
708 | if (r < 0) | |
709 | goto fail; | |
e04aad61 | 710 | |
cd2086fe | 711 | if (r > 0) { |
718db961 | 712 | r = swap_arm_timer(s); |
646134dc | 713 | if (r < 0) |
e04aad61 LP |
714 | goto fail; |
715 | ||
716 | swap_set_state(s, state); | |
ac84d1fb LP |
717 | } else if (state == SWAP_ACTIVATING_SIGTERM) |
718 | swap_enter_signal(s, SWAP_ACTIVATING_SIGKILL, SWAP_SUCCESS); | |
719 | else if (state == SWAP_DEACTIVATING_SIGTERM) | |
720 | swap_enter_signal(s, SWAP_DEACTIVATING_SIGKILL, SWAP_SUCCESS); | |
721 | else | |
e1770af8 | 722 | swap_enter_dead(s, SWAP_SUCCESS); |
e04aad61 LP |
723 | |
724 | return; | |
725 | ||
726 | fail: | |
66870f90 ZJS |
727 | log_warning_unit(UNIT(s)->id, |
728 | "%s failed to kill processes: %s", UNIT(s)->id, strerror(-r)); | |
e04aad61 | 729 | |
e1770af8 | 730 | swap_enter_dead(s, SWAP_FAILURE_RESOURCES); |
e04aad61 LP |
731 | } |
732 | ||
733 | static void swap_enter_activating(Swap *s) { | |
734 | int r, priority; | |
735 | ||
736 | assert(s); | |
737 | ||
738 | s->control_command_id = SWAP_EXEC_ACTIVATE; | |
739 | s->control_command = s->exec_command + SWAP_EXEC_ACTIVATE; | |
07b0b134 | 740 | |
4e85aff4 LP |
741 | if (s->from_fragment) |
742 | priority = s->parameters_fragment.priority; | |
e04aad61 LP |
743 | else |
744 | priority = -1; | |
4e85aff4 | 745 | |
e04aad61 | 746 | if (priority >= 0) { |
5bcb0f2b | 747 | char p[DECIMAL_STR_MAX(int)]; |
07b0b134 | 748 | |
5bcb0f2b | 749 | sprintf(p, "%i", priority); |
07b0b134 | 750 | |
e04aad61 LP |
751 | r = exec_command_set( |
752 | s->control_command, | |
753 | "/sbin/swapon", | |
754 | "-p", | |
755 | p, | |
756 | s->what, | |
757 | NULL); | |
758 | } else | |
759 | r = exec_command_set( | |
760 | s->control_command, | |
761 | "/sbin/swapon", | |
762 | s->what, | |
763 | NULL); | |
764 | ||
765 | if (r < 0) | |
766 | goto fail; | |
767 | ||
768 | swap_unwatch_control_pid(s); | |
769 | ||
646134dc ZJS |
770 | r = swap_spawn(s, s->control_command, &s->control_pid); |
771 | if (r < 0) | |
e04aad61 LP |
772 | goto fail; |
773 | ||
774 | swap_set_state(s, SWAP_ACTIVATING); | |
775 | ||
776 | return; | |
777 | ||
778 | fail: | |
66870f90 ZJS |
779 | log_warning_unit(UNIT(s)->id, |
780 | "%s failed to run 'swapon' task: %s", | |
781 | UNIT(s)->id, strerror(-r)); | |
e1770af8 | 782 | swap_enter_dead(s, SWAP_FAILURE_RESOURCES); |
e04aad61 LP |
783 | } |
784 | ||
e1770af8 | 785 | static void swap_enter_deactivating(Swap *s) { |
e04aad61 LP |
786 | int r; |
787 | ||
788 | assert(s); | |
789 | ||
e04aad61 LP |
790 | s->control_command_id = SWAP_EXEC_DEACTIVATE; |
791 | s->control_command = s->exec_command + SWAP_EXEC_DEACTIVATE; | |
792 | ||
646134dc | 793 | r = exec_command_set(s->control_command, |
e04aad61 LP |
794 | "/sbin/swapoff", |
795 | s->what, | |
646134dc ZJS |
796 | NULL); |
797 | if (r < 0) | |
e04aad61 LP |
798 | goto fail; |
799 | ||
800 | swap_unwatch_control_pid(s); | |
801 | ||
646134dc ZJS |
802 | r = swap_spawn(s, s->control_command, &s->control_pid); |
803 | if (r < 0) | |
e04aad61 LP |
804 | goto fail; |
805 | ||
806 | swap_set_state(s, SWAP_DEACTIVATING); | |
807 | ||
808 | return; | |
809 | ||
810 | fail: | |
66870f90 ZJS |
811 | log_warning_unit(UNIT(s)->id, |
812 | "%s failed to run 'swapoff' task: %s", | |
813 | UNIT(s)->id, strerror(-r)); | |
e1770af8 | 814 | swap_enter_active(s, SWAP_FAILURE_RESOURCES); |
e04aad61 LP |
815 | } |
816 | ||
817 | static int swap_start(Unit *u) { | |
818 | Swap *s = SWAP(u); | |
819 | ||
820 | assert(s); | |
821 | ||
822 | /* We cannot fulfill this request right now, try again later | |
823 | * please! */ | |
824 | ||
825 | if (s->state == SWAP_DEACTIVATING || | |
826 | s->state == SWAP_DEACTIVATING_SIGTERM || | |
827 | s->state == SWAP_DEACTIVATING_SIGKILL || | |
828 | s->state == SWAP_ACTIVATING_SIGTERM || | |
829 | s->state == SWAP_ACTIVATING_SIGKILL) | |
830 | return -EAGAIN; | |
831 | ||
832 | if (s->state == SWAP_ACTIVATING) | |
833 | return 0; | |
834 | ||
835 | assert(s->state == SWAP_DEAD || s->state == SWAP_FAILED); | |
836 | ||
a5c3034f LP |
837 | if (detect_container(NULL) > 0) |
838 | return -EPERM; | |
839 | ||
e1770af8 | 840 | s->result = SWAP_SUCCESS; |
e04aad61 | 841 | swap_enter_activating(s); |
07b0b134 ML |
842 | return 0; |
843 | } | |
844 | ||
845 | static int swap_stop(Unit *u) { | |
846 | Swap *s = SWAP(u); | |
07b0b134 ML |
847 | |
848 | assert(s); | |
849 | ||
e04aad61 LP |
850 | if (s->state == SWAP_DEACTIVATING || |
851 | s->state == SWAP_DEACTIVATING_SIGTERM || | |
852 | s->state == SWAP_DEACTIVATING_SIGKILL || | |
853 | s->state == SWAP_ACTIVATING_SIGTERM || | |
854 | s->state == SWAP_ACTIVATING_SIGKILL) | |
855 | return 0; | |
07b0b134 | 856 | |
e04aad61 | 857 | assert(s->state == SWAP_ACTIVATING || |
5bcb0f2b | 858 | s->state == SWAP_ACTIVATING_DONE || |
e04aad61 | 859 | s->state == SWAP_ACTIVE); |
07b0b134 | 860 | |
a5c3034f LP |
861 | if (detect_container(NULL) > 0) |
862 | return -EPERM; | |
863 | ||
e1770af8 | 864 | swap_enter_deactivating(s); |
07b0b134 ML |
865 | return 0; |
866 | } | |
867 | ||
868 | static int swap_serialize(Unit *u, FILE *f, FDSet *fds) { | |
869 | Swap *s = SWAP(u); | |
870 | ||
871 | assert(s); | |
872 | assert(f); | |
873 | assert(fds); | |
874 | ||
875 | unit_serialize_item(u, f, "state", swap_state_to_string(s->state)); | |
e1770af8 | 876 | unit_serialize_item(u, f, "result", swap_result_to_string(s->result)); |
e04aad61 LP |
877 | |
878 | if (s->control_pid > 0) | |
879 | unit_serialize_item_format(u, f, "control-pid", "%lu", (unsigned long) s->control_pid); | |
880 | ||
881 | if (s->control_command_id >= 0) | |
882 | unit_serialize_item(u, f, "control-command", swap_exec_command_to_string(s->control_command_id)); | |
07b0b134 ML |
883 | |
884 | return 0; | |
885 | } | |
886 | ||
887 | static int swap_deserialize_item(Unit *u, const char *key, const char *value, FDSet *fds) { | |
888 | Swap *s = SWAP(u); | |
889 | ||
890 | assert(s); | |
891 | assert(fds); | |
892 | ||
893 | if (streq(key, "state")) { | |
894 | SwapState state; | |
895 | ||
646134dc ZJS |
896 | state = swap_state_from_string(value); |
897 | if (state < 0) | |
66870f90 | 898 | log_debug_unit(u->id, "Failed to parse state value %s", value); |
07b0b134 ML |
899 | else |
900 | s->deserialized_state = state; | |
e1770af8 LP |
901 | } else if (streq(key, "result")) { |
902 | SwapResult f; | |
903 | ||
904 | f = swap_result_from_string(value); | |
905 | if (f < 0) | |
66870f90 | 906 | log_debug_unit(u->id, "Failed to parse result value %s", value); |
e1770af8 LP |
907 | else if (f != SWAP_SUCCESS) |
908 | s->result = f; | |
e04aad61 LP |
909 | } else if (streq(key, "control-pid")) { |
910 | pid_t pid; | |
911 | ||
912 | if (parse_pid(value, &pid) < 0) | |
66870f90 | 913 | log_debug_unit(u->id, "Failed to parse control-pid value %s", value); |
e04aad61 LP |
914 | else |
915 | s->control_pid = pid; | |
916 | ||
917 | } else if (streq(key, "control-command")) { | |
918 | SwapExecCommand id; | |
919 | ||
646134dc ZJS |
920 | id = swap_exec_command_from_string(value); |
921 | if (id < 0) | |
66870f90 | 922 | log_debug_unit(u->id, "Failed to parse exec-command value %s", value); |
e04aad61 LP |
923 | else { |
924 | s->control_command_id = id; | |
925 | s->control_command = s->exec_command + id; | |
926 | } | |
07b0b134 | 927 | } else |
66870f90 | 928 | log_debug_unit(u->id, "Unknown serialization key '%s'", key); |
07b0b134 ML |
929 | |
930 | return 0; | |
931 | } | |
932 | ||
44a6b1b6 | 933 | _pure_ static UnitActiveState swap_active_state(Unit *u) { |
07b0b134 ML |
934 | assert(u); |
935 | ||
936 | return state_translation_table[SWAP(u)->state]; | |
937 | } | |
938 | ||
44a6b1b6 | 939 | _pure_ static const char *swap_sub_state_to_string(Unit *u) { |
07b0b134 ML |
940 | assert(u); |
941 | ||
942 | return swap_state_to_string(SWAP(u)->state); | |
943 | } | |
944 | ||
44a6b1b6 | 945 | _pure_ static bool swap_check_gc(Unit *u) { |
07b0b134 ML |
946 | Swap *s = SWAP(u); |
947 | ||
948 | assert(s); | |
949 | ||
6b1dc2bd | 950 | return s->from_proc_swaps; |
07b0b134 ML |
951 | } |
952 | ||
e04aad61 LP |
953 | static void swap_sigchld_event(Unit *u, pid_t pid, int code, int status) { |
954 | Swap *s = SWAP(u); | |
e1770af8 | 955 | SwapResult f; |
e04aad61 LP |
956 | |
957 | assert(s); | |
958 | assert(pid >= 0); | |
959 | ||
960 | if (pid != s->control_pid) | |
961 | return; | |
962 | ||
963 | s->control_pid = 0; | |
964 | ||
96342de6 | 965 | if (is_clean_exit(code, status, NULL)) |
e1770af8 LP |
966 | f = SWAP_SUCCESS; |
967 | else if (code == CLD_EXITED) | |
968 | f = SWAP_FAILURE_EXIT_CODE; | |
969 | else if (code == CLD_KILLED) | |
970 | f = SWAP_FAILURE_SIGNAL; | |
971 | else if (code == CLD_DUMPED) | |
972 | f = SWAP_FAILURE_CORE_DUMP; | |
973 | else | |
974 | assert_not_reached("Unknown code"); | |
975 | ||
976 | if (f != SWAP_SUCCESS) | |
977 | s->result = f; | |
e04aad61 LP |
978 | |
979 | if (s->control_command) { | |
6ea832a2 | 980 | exec_status_exit(&s->control_command->exec_status, &s->exec_context, pid, code, status); |
e1770af8 | 981 | |
e04aad61 LP |
982 | s->control_command = NULL; |
983 | s->control_command_id = _SWAP_EXEC_COMMAND_INVALID; | |
984 | } | |
985 | ||
66870f90 ZJS |
986 | log_full_unit(f == SWAP_SUCCESS ? LOG_DEBUG : LOG_NOTICE, |
987 | u->id, | |
988 | "%s swap process exited, code=%s status=%i", | |
989 | u->id, sigchld_code_to_string(code), status); | |
e04aad61 LP |
990 | |
991 | switch (s->state) { | |
992 | ||
993 | case SWAP_ACTIVATING: | |
5bcb0f2b | 994 | case SWAP_ACTIVATING_DONE: |
e04aad61 LP |
995 | case SWAP_ACTIVATING_SIGTERM: |
996 | case SWAP_ACTIVATING_SIGKILL: | |
997 | ||
e1770af8 LP |
998 | if (f == SWAP_SUCCESS) |
999 | swap_enter_active(s, f); | |
e04aad61 | 1000 | else |
e1770af8 | 1001 | swap_enter_dead(s, f); |
e04aad61 LP |
1002 | break; |
1003 | ||
1004 | case SWAP_DEACTIVATING: | |
1005 | case SWAP_DEACTIVATING_SIGKILL: | |
1006 | case SWAP_DEACTIVATING_SIGTERM: | |
1007 | ||
7bb01eff | 1008 | swap_enter_dead(s, f); |
e04aad61 LP |
1009 | break; |
1010 | ||
1011 | default: | |
1012 | assert_not_reached("Uh, control process died at wrong time."); | |
1013 | } | |
1014 | ||
1015 | /* Notify clients about changed exit status */ | |
1016 | unit_add_to_dbus_queue(u); | |
e04aad61 LP |
1017 | } |
1018 | ||
718db961 LP |
1019 | static int swap_dispatch_timer(sd_event_source *source, usec_t usec, void *userdata) { |
1020 | Swap *s = SWAP(userdata); | |
e04aad61 LP |
1021 | |
1022 | assert(s); | |
718db961 | 1023 | assert(s->timer_event_source == source); |
e04aad61 LP |
1024 | |
1025 | switch (s->state) { | |
1026 | ||
1027 | case SWAP_ACTIVATING: | |
5bcb0f2b | 1028 | case SWAP_ACTIVATING_DONE: |
718db961 | 1029 | log_warning_unit(UNIT(s)->id, "%s activation timed out. Stopping.", UNIT(s)->id); |
e1770af8 | 1030 | swap_enter_signal(s, SWAP_ACTIVATING_SIGTERM, SWAP_FAILURE_TIMEOUT); |
e04aad61 LP |
1031 | break; |
1032 | ||
1033 | case SWAP_DEACTIVATING: | |
718db961 | 1034 | log_warning_unit(UNIT(s)->id, "%s deactivation timed out. Stopping.", UNIT(s)->id); |
e1770af8 | 1035 | swap_enter_signal(s, SWAP_DEACTIVATING_SIGTERM, SWAP_FAILURE_TIMEOUT); |
e04aad61 LP |
1036 | break; |
1037 | ||
1038 | case SWAP_ACTIVATING_SIGTERM: | |
4819ff03 | 1039 | if (s->kill_context.send_sigkill) { |
718db961 | 1040 | log_warning_unit(UNIT(s)->id, "%s activation timed out. Killing.", UNIT(s)->id); |
e1770af8 | 1041 | swap_enter_signal(s, SWAP_ACTIVATING_SIGKILL, SWAP_FAILURE_TIMEOUT); |
ba035df2 | 1042 | } else { |
718db961 | 1043 | log_warning_unit(UNIT(s)->id, "%s activation timed out. Skipping SIGKILL. Ignoring.", UNIT(s)->id); |
e1770af8 | 1044 | swap_enter_dead(s, SWAP_FAILURE_TIMEOUT); |
ba035df2 | 1045 | } |
e04aad61 LP |
1046 | break; |
1047 | ||
1048 | case SWAP_DEACTIVATING_SIGTERM: | |
4819ff03 | 1049 | if (s->kill_context.send_sigkill) { |
718db961 | 1050 | log_warning_unit(UNIT(s)->id, "%s deactivation timed out. Killing.", UNIT(s)->id); |
e1770af8 | 1051 | swap_enter_signal(s, SWAP_DEACTIVATING_SIGKILL, SWAP_FAILURE_TIMEOUT); |
ba035df2 | 1052 | } else { |
718db961 | 1053 | log_warning_unit(UNIT(s)->id, "%s deactivation timed out. Skipping SIGKILL. Ignoring.", UNIT(s)->id); |
e1770af8 | 1054 | swap_enter_dead(s, SWAP_FAILURE_TIMEOUT); |
ba035df2 | 1055 | } |
e04aad61 LP |
1056 | break; |
1057 | ||
1058 | case SWAP_ACTIVATING_SIGKILL: | |
1059 | case SWAP_DEACTIVATING_SIGKILL: | |
718db961 | 1060 | log_warning_unit(UNIT(s)->id, "%s swap process still around after SIGKILL. Ignoring.", UNIT(s)->id); |
e1770af8 | 1061 | swap_enter_dead(s, SWAP_FAILURE_TIMEOUT); |
e04aad61 LP |
1062 | break; |
1063 | ||
1064 | default: | |
1065 | assert_not_reached("Timeout at wrong time."); | |
1066 | } | |
718db961 LP |
1067 | |
1068 | return 0; | |
e04aad61 LP |
1069 | } |
1070 | ||
1071 | static int swap_load_proc_swaps(Manager *m, bool set_flags) { | |
1072 | unsigned i; | |
1073 | int r = 0; | |
1074 | ||
1075 | assert(m); | |
1076 | ||
07b0b134 | 1077 | rewind(m->proc_swaps); |
bab45044 | 1078 | |
4e85aff4 | 1079 | (void) fscanf(m->proc_swaps, "%*s %*s %*s %*s %*s\n"); |
07b0b134 | 1080 | |
e04aad61 | 1081 | for (i = 1;; i++) { |
9fb3675e | 1082 | _cleanup_free_ char *dev = NULL, *d = NULL; |
07b0b134 ML |
1083 | int prio = 0, k; |
1084 | ||
646134dc ZJS |
1085 | k = fscanf(m->proc_swaps, |
1086 | "%ms " /* device/file */ | |
1087 | "%*s " /* type of swap */ | |
1088 | "%*s " /* swap size */ | |
1089 | "%*s " /* used */ | |
1090 | "%i\n", /* priority */ | |
1091 | &dev, &prio); | |
1092 | if (k != 2) { | |
07b0b134 | 1093 | if (k == EOF) |
4e85aff4 | 1094 | break; |
07b0b134 | 1095 | |
646134dc | 1096 | log_warning("Failed to parse /proc/swaps:%u", i); |
e04aad61 | 1097 | continue; |
07b0b134 | 1098 | } |
07b0b134 | 1099 | |
4e85aff4 | 1100 | d = cunescape(dev); |
4e85aff4 LP |
1101 | if (!d) |
1102 | return -ENOMEM; | |
1103 | ||
e04aad61 | 1104 | k = swap_process_new_swap(m, d, prio, set_flags); |
07b0b134 | 1105 | if (k < 0) |
e04aad61 | 1106 | r = k; |
07b0b134 ML |
1107 | } |
1108 | ||
e04aad61 LP |
1109 | return r; |
1110 | } | |
1111 | ||
718db961 LP |
1112 | static int swap_dispatch_io(sd_event_source *source, int fd, uint32_t revents, void *userdata) { |
1113 | Manager *m = userdata; | |
595ed347 | 1114 | Unit *u; |
4e434314 LP |
1115 | int r; |
1116 | ||
1117 | assert(m); | |
718db961 | 1118 | assert(revents & EPOLLPRI); |
4e434314 | 1119 | |
646134dc ZJS |
1120 | r = swap_load_proc_swaps(m, true); |
1121 | if (r < 0) { | |
e04aad61 LP |
1122 | log_error("Failed to reread /proc/swaps: %s", strerror(-r)); |
1123 | ||
1124 | /* Reset flags, just in case, for late calls */ | |
595ed347 MS |
1125 | LIST_FOREACH(units_by_type, u, m->units_by_type[UNIT_SWAP]) { |
1126 | Swap *swap = SWAP(u); | |
e04aad61 LP |
1127 | |
1128 | swap->is_active = swap->just_activated = false; | |
1129 | } | |
1130 | ||
1131 | return 0; | |
1132 | } | |
1133 | ||
1134 | manager_dispatch_load_queue(m); | |
1135 | ||
595ed347 MS |
1136 | LIST_FOREACH(units_by_type, u, m->units_by_type[UNIT_SWAP]) { |
1137 | Swap *swap = SWAP(u); | |
e04aad61 LP |
1138 | |
1139 | if (!swap->is_active) { | |
1140 | /* This has just been deactivated */ | |
1141 | ||
e04aad61 LP |
1142 | swap_unset_proc_swaps(swap); |
1143 | ||
1144 | switch (swap->state) { | |
1145 | ||
1146 | case SWAP_ACTIVE: | |
e1770af8 | 1147 | swap_enter_dead(swap, SWAP_SUCCESS); |
e04aad61 LP |
1148 | break; |
1149 | ||
1150 | default: | |
5bcb0f2b | 1151 | /* Fire again */ |
e04aad61 LP |
1152 | swap_set_state(swap, swap->state); |
1153 | break; | |
1154 | } | |
1155 | ||
1156 | } else if (swap->just_activated) { | |
1157 | ||
1158 | /* New swap entry */ | |
1159 | ||
1160 | switch (swap->state) { | |
1161 | ||
1162 | case SWAP_DEAD: | |
1163 | case SWAP_FAILED: | |
e1770af8 | 1164 | swap_enter_active(swap, SWAP_SUCCESS); |
e04aad61 LP |
1165 | break; |
1166 | ||
5bcb0f2b LP |
1167 | case SWAP_ACTIVATING: |
1168 | swap_set_state(swap, SWAP_ACTIVATING_DONE); | |
1169 | break; | |
1170 | ||
e04aad61 LP |
1171 | default: |
1172 | /* Nothing really changed, but let's | |
1173 | * issue an notification call | |
1174 | * nonetheless, in case somebody is | |
1175 | * waiting for this. */ | |
1176 | swap_set_state(swap, swap->state); | |
1177 | break; | |
1178 | } | |
1179 | } | |
1180 | ||
1181 | /* Reset the flags for later calls */ | |
1182 | swap->is_active = swap->just_activated = false; | |
1183 | } | |
1184 | ||
1185 | return 1; | |
1186 | } | |
1187 | ||
1188 | static Unit *swap_following(Unit *u) { | |
1189 | Swap *s = SWAP(u); | |
1190 | Swap *other, *first = NULL; | |
1191 | ||
1192 | assert(s); | |
1193 | ||
9670d583 | 1194 | if (streq_ptr(s->what, s->devnode)) |
e04aad61 LP |
1195 | return NULL; |
1196 | ||
1197 | /* Make everybody follow the unit that's named after the swap | |
1198 | * device in the kernel */ | |
1199 | ||
9670d583 LP |
1200 | LIST_FOREACH_AFTER(same_devnode, other, s) |
1201 | if (streq_ptr(other->what, other->devnode)) | |
e04aad61 LP |
1202 | return UNIT(other); |
1203 | ||
9670d583 LP |
1204 | LIST_FOREACH_BEFORE(same_devnode, other, s) { |
1205 | if (streq_ptr(other->what, other->devnode)) | |
e04aad61 LP |
1206 | return UNIT(other); |
1207 | ||
1208 | first = other; | |
1209 | } | |
1210 | ||
1211 | return UNIT(first); | |
07b0b134 ML |
1212 | } |
1213 | ||
6210e7fc | 1214 | static int swap_following_set(Unit *u, Set **_set) { |
5bcb0f2b | 1215 | Swap *s = SWAP(u), *other; |
6210e7fc LP |
1216 | Set *set; |
1217 | int r; | |
1218 | ||
1219 | assert(s); | |
1220 | assert(_set); | |
1221 | ||
9670d583 | 1222 | if (LIST_JUST_US(same_devnode, s)) { |
6210e7fc LP |
1223 | *_set = NULL; |
1224 | return 0; | |
1225 | } | |
1226 | ||
5bcb0f2b LP |
1227 | set = set_new(NULL, NULL); |
1228 | if (!set) | |
6210e7fc LP |
1229 | return -ENOMEM; |
1230 | ||
9670d583 | 1231 | LIST_FOREACH_AFTER(same_devnode, other, s) { |
5bcb0f2b LP |
1232 | r = set_put(set, other); |
1233 | if (r < 0) | |
6210e7fc | 1234 | goto fail; |
5bcb0f2b | 1235 | } |
6210e7fc | 1236 | |
9670d583 | 1237 | LIST_FOREACH_BEFORE(same_devnode, other, s) { |
5bcb0f2b LP |
1238 | r = set_put(set, other); |
1239 | if (r < 0) | |
6210e7fc | 1240 | goto fail; |
5bcb0f2b | 1241 | } |
6210e7fc LP |
1242 | |
1243 | *_set = set; | |
1244 | return 1; | |
1245 | ||
1246 | fail: | |
1247 | set_free(set); | |
1248 | return r; | |
1249 | } | |
1250 | ||
07b0b134 ML |
1251 | static void swap_shutdown(Manager *m) { |
1252 | assert(m); | |
1253 | ||
718db961 LP |
1254 | m->swap_event_source = sd_event_source_unref(m->swap_event_source); |
1255 | ||
07b0b134 ML |
1256 | if (m->proc_swaps) { |
1257 | fclose(m->proc_swaps); | |
1258 | m->proc_swaps = NULL; | |
1259 | } | |
e04aad61 | 1260 | |
9670d583 LP |
1261 | hashmap_free(m->swaps_by_devnode); |
1262 | m->swaps_by_devnode = NULL; | |
07b0b134 ML |
1263 | } |
1264 | ||
07b0b134 ML |
1265 | static int swap_enumerate(Manager *m) { |
1266 | int r; | |
9670d583 | 1267 | |
07b0b134 ML |
1268 | assert(m); |
1269 | ||
4e434314 | 1270 | if (!m->proc_swaps) { |
646134dc ZJS |
1271 | m->proc_swaps = fopen("/proc/swaps", "re"); |
1272 | if (!m->proc_swaps) | |
718db961 | 1273 | return errno == ENOENT ? 0 : -errno; |
4e434314 | 1274 | |
151b9b96 | 1275 | r = sd_event_add_io(m->event, &m->swap_event_source, fileno(m->proc_swaps), EPOLLPRI, swap_dispatch_io, m); |
718db961 | 1276 | if (r < 0) |
29083707 LP |
1277 | goto fail; |
1278 | ||
1279 | /* Dispatch this before we dispatch SIGCHLD, so that | |
1280 | * we always get the events from /proc/swaps before | |
1281 | * the SIGCHLD of /sbin/swapon. */ | |
1282 | r = sd_event_source_set_priority(m->swap_event_source, -10); | |
1283 | if (r < 0) | |
718db961 | 1284 | goto fail; |
4e434314 LP |
1285 | } |
1286 | ||
646134dc ZJS |
1287 | r = swap_load_proc_swaps(m, false); |
1288 | if (r < 0) | |
718db961 LP |
1289 | goto fail; |
1290 | ||
1291 | return 0; | |
07b0b134 | 1292 | |
718db961 LP |
1293 | fail: |
1294 | swap_shutdown(m); | |
07b0b134 ML |
1295 | return r; |
1296 | } | |
1297 | ||
9670d583 LP |
1298 | int swap_process_new_device(Manager *m, struct udev_device *dev) { |
1299 | struct udev_list_entry *item = NULL, *first = NULL; | |
1300 | _cleanup_free_ char *e = NULL; | |
1301 | const char *dn; | |
1302 | Swap *s; | |
1303 | int r = 0; | |
1304 | ||
1305 | assert(m); | |
1306 | assert(dev); | |
1307 | ||
1308 | dn = udev_device_get_devnode(dev); | |
1309 | if (!dn) | |
1310 | return 0; | |
1311 | ||
1312 | e = unit_name_from_path(dn, ".swap"); | |
1313 | if (!e) | |
1314 | return -ENOMEM; | |
1315 | ||
1316 | s = hashmap_get(m->units, e); | |
1317 | if (s) | |
1318 | r = swap_set_devnode(s, dn); | |
1319 | ||
1320 | first = udev_device_get_devlinks_list_entry(dev); | |
1321 | udev_list_entry_foreach(item, first) { | |
1322 | _cleanup_free_ char *n = NULL; | |
1323 | ||
1324 | n = unit_name_from_path(udev_list_entry_get_name(item), ".swap"); | |
1325 | if (!n) | |
1326 | return -ENOMEM; | |
1327 | ||
1328 | s = hashmap_get(m->units, n); | |
1329 | if (s) { | |
1330 | int q; | |
1331 | ||
1332 | q = swap_set_devnode(s, dn); | |
1333 | if (q < 0) | |
1334 | r = q; | |
1335 | } | |
1336 | } | |
1337 | ||
1338 | return r; | |
1339 | } | |
1340 | ||
1341 | int swap_process_removed_device(Manager *m, struct udev_device *dev) { | |
9670d583 LP |
1342 | const char *dn; |
1343 | int r = 0; | |
1344 | Swap *s; | |
1345 | ||
1346 | dn = udev_device_get_devnode(dev); | |
1347 | if (!dn) | |
1348 | return 0; | |
1349 | ||
1350 | while ((s = hashmap_get(m->swaps_by_devnode, dn))) { | |
1351 | int q; | |
1352 | ||
1353 | q = swap_set_devnode(s, NULL); | |
1354 | if (q < 0) | |
1355 | r = q; | |
1356 | } | |
1357 | ||
1358 | return r; | |
1359 | } | |
1360 | ||
fdf20a31 | 1361 | static void swap_reset_failed(Unit *u) { |
5632e374 LP |
1362 | Swap *s = SWAP(u); |
1363 | ||
1364 | assert(s); | |
1365 | ||
fdf20a31 | 1366 | if (s->state == SWAP_FAILED) |
5632e374 | 1367 | swap_set_state(s, SWAP_DEAD); |
e04aad61 | 1368 | |
e1770af8 | 1369 | s->result = SWAP_SUCCESS; |
5632e374 LP |
1370 | } |
1371 | ||
718db961 | 1372 | static int swap_kill(Unit *u, KillWho who, int signo, sd_bus_error *error) { |
814cc562 | 1373 | return unit_kill_common(u, who, signo, -1, SWAP(u)->control_pid, error); |
8a0867d6 LP |
1374 | } |
1375 | ||
68db7a3b ZJS |
1376 | static int swap_get_timeout(Unit *u, uint64_t *timeout) { |
1377 | Swap *s = SWAP(u); | |
1378 | int r; | |
1379 | ||
1380 | if (!s->timer_event_source) | |
1381 | return 0; | |
1382 | ||
1383 | r = sd_event_source_get_time(s->timer_event_source, timeout); | |
1384 | if (r < 0) | |
1385 | return r; | |
1386 | ||
1387 | return 1; | |
1388 | } | |
1389 | ||
5632e374 LP |
1390 | static const char* const swap_state_table[_SWAP_STATE_MAX] = { |
1391 | [SWAP_DEAD] = "dead", | |
e04aad61 | 1392 | [SWAP_ACTIVATING] = "activating", |
5bcb0f2b | 1393 | [SWAP_ACTIVATING_DONE] = "activating-done", |
5632e374 | 1394 | [SWAP_ACTIVE] = "active", |
e04aad61 LP |
1395 | [SWAP_DEACTIVATING] = "deactivating", |
1396 | [SWAP_ACTIVATING_SIGTERM] = "activating-sigterm", | |
1397 | [SWAP_ACTIVATING_SIGKILL] = "activating-sigkill", | |
1398 | [SWAP_DEACTIVATING_SIGTERM] = "deactivating-sigterm", | |
1399 | [SWAP_DEACTIVATING_SIGKILL] = "deactivating-sigkill", | |
fdf20a31 | 1400 | [SWAP_FAILED] = "failed" |
5632e374 LP |
1401 | }; |
1402 | ||
1403 | DEFINE_STRING_TABLE_LOOKUP(swap_state, SwapState); | |
1404 | ||
e04aad61 LP |
1405 | static const char* const swap_exec_command_table[_SWAP_EXEC_COMMAND_MAX] = { |
1406 | [SWAP_EXEC_ACTIVATE] = "ExecActivate", | |
1407 | [SWAP_EXEC_DEACTIVATE] = "ExecDeactivate", | |
1408 | }; | |
1409 | ||
1410 | DEFINE_STRING_TABLE_LOOKUP(swap_exec_command, SwapExecCommand); | |
1411 | ||
e1770af8 LP |
1412 | static const char* const swap_result_table[_SWAP_RESULT_MAX] = { |
1413 | [SWAP_SUCCESS] = "success", | |
1414 | [SWAP_FAILURE_RESOURCES] = "resources", | |
1415 | [SWAP_FAILURE_TIMEOUT] = "timeout", | |
1416 | [SWAP_FAILURE_EXIT_CODE] = "exit-code", | |
1417 | [SWAP_FAILURE_SIGNAL] = "signal", | |
1418 | [SWAP_FAILURE_CORE_DUMP] = "core-dump" | |
1419 | }; | |
1420 | ||
1421 | DEFINE_STRING_TABLE_LOOKUP(swap_result, SwapResult); | |
1422 | ||
07b0b134 | 1423 | const UnitVTable swap_vtable = { |
7d17cfbc | 1424 | .object_size = sizeof(Swap), |
718db961 LP |
1425 | .exec_context_offset = offsetof(Swap, exec_context), |
1426 | .cgroup_context_offset = offsetof(Swap, cgroup_context), | |
1427 | .kill_context_offset = offsetof(Swap, kill_context), | |
613b411c | 1428 | .exec_runtime_offset = offsetof(Swap, exec_runtime), |
3ef63c31 | 1429 | |
f975e971 LP |
1430 | .sections = |
1431 | "Unit\0" | |
1432 | "Swap\0" | |
1433 | "Install\0", | |
4ad49000 | 1434 | .private_section = "Swap", |
71645aca | 1435 | |
e04aad61 | 1436 | .no_alias = true, |
07b0b134 ML |
1437 | .no_instances = true, |
1438 | ||
4e85aff4 | 1439 | .init = swap_init, |
07b0b134 | 1440 | .load = swap_load, |
6e620bec | 1441 | .done = swap_done, |
07b0b134 ML |
1442 | |
1443 | .coldplug = swap_coldplug, | |
1444 | ||
1445 | .dump = swap_dump, | |
1446 | ||
1447 | .start = swap_start, | |
1448 | .stop = swap_stop, | |
1449 | ||
8a0867d6 LP |
1450 | .kill = swap_kill, |
1451 | ||
68db7a3b ZJS |
1452 | .get_timeout = swap_get_timeout, |
1453 | ||
07b0b134 ML |
1454 | .serialize = swap_serialize, |
1455 | .deserialize_item = swap_deserialize_item, | |
1456 | ||
1457 | .active_state = swap_active_state, | |
1458 | .sub_state_to_string = swap_sub_state_to_string, | |
1459 | ||
1460 | .check_gc = swap_check_gc, | |
1461 | ||
e04aad61 | 1462 | .sigchld_event = swap_sigchld_event, |
e04aad61 LP |
1463 | |
1464 | .reset_failed = swap_reset_failed, | |
1465 | ||
c4e2ceae | 1466 | .bus_interface = "org.freedesktop.systemd1.Swap", |
718db961 | 1467 | .bus_vtable = bus_swap_vtable, |
74c964d3 LP |
1468 | .bus_set_property = bus_swap_set_property, |
1469 | .bus_commit_properties = bus_swap_commit_properties, | |
07b0b134 | 1470 | |
e04aad61 | 1471 | .following = swap_following, |
6210e7fc | 1472 | .following_set = swap_following_set, |
5632e374 | 1473 | |
6e620bec | 1474 | .enumerate = swap_enumerate, |
c6918296 MS |
1475 | .shutdown = swap_shutdown, |
1476 | ||
1477 | .status_message_formats = { | |
1478 | .starting_stopping = { | |
1479 | [0] = "Activating swap %s...", | |
1480 | [1] = "Deactivating swap %s...", | |
1481 | }, | |
1482 | .finished_start_job = { | |
1483 | [JOB_DONE] = "Activated swap %s.", | |
1484 | [JOB_FAILED] = "Failed to activate swap %s.", | |
1485 | [JOB_DEPENDENCY] = "Dependency failed for %s.", | |
1486 | [JOB_TIMEOUT] = "Timed out activating swap %s.", | |
1487 | }, | |
1488 | .finished_stop_job = { | |
1489 | [JOB_DONE] = "Deactivated swap %s.", | |
1490 | [JOB_FAILED] = "Failed deactivating swap %s.", | |
1491 | [JOB_TIMEOUT] = "Timed out deactivating swap %s.", | |
1492 | }, | |
1493 | }, | |
07b0b134 | 1494 | }; |