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d6c9574f | 1 | /*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/ |
07b0b134 ML |
2 | |
3 | /*** | |
4 | This file is part of systemd. | |
5 | ||
6 | Copyright 2010 Lennart Poettering | |
7 | ||
8 | systemd is free software; you can redistribute it and/or modify it | |
5430f7f2 LP |
9 | under the terms of the GNU Lesser General Public License as published by |
10 | the Free Software Foundation; either version 2.1 of the License, or | |
07b0b134 ML |
11 | (at your option) any later version. |
12 | ||
13 | systemd is distributed in the hope that it will be useful, but | |
14 | WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
5430f7f2 | 16 | Lesser General Public License for more details. |
07b0b134 | 17 | |
5430f7f2 | 18 | You should have received a copy of the GNU Lesser General Public License |
07b0b134 ML |
19 | along with systemd; If not, see <http://www.gnu.org/licenses/>. |
20 | ***/ | |
21 | ||
22 | #include <errno.h> | |
23 | #include <limits.h> | |
24 | #include <unistd.h> | |
25 | #include <fcntl.h> | |
26 | #include <sys/epoll.h> | |
27 | #include <sys/stat.h> | |
28 | #include <sys/swap.h> | |
e04aad61 | 29 | #include <libudev.h> |
07b0b134 ML |
30 | |
31 | #include "unit.h" | |
32 | #include "swap.h" | |
33 | #include "load-fragment.h" | |
34 | #include "load-dropin.h" | |
35 | #include "unit-name.h" | |
36 | #include "dbus-swap.h" | |
514f4ef5 | 37 | #include "special.h" |
8a0867d6 | 38 | #include "bus-errors.h" |
9a57c629 | 39 | #include "exit-status.h" |
f6a6225e | 40 | #include "def.h" |
9eb977db | 41 | #include "path-util.h" |
a5c3034f | 42 | #include "virt.h" |
07b0b134 ML |
43 | |
44 | static const UnitActiveState state_translation_table[_SWAP_STATE_MAX] = { | |
45 | [SWAP_DEAD] = UNIT_INACTIVE, | |
e04aad61 | 46 | [SWAP_ACTIVATING] = UNIT_ACTIVATING, |
07b0b134 | 47 | [SWAP_ACTIVE] = UNIT_ACTIVE, |
e04aad61 LP |
48 | [SWAP_DEACTIVATING] = UNIT_DEACTIVATING, |
49 | [SWAP_ACTIVATING_SIGTERM] = UNIT_DEACTIVATING, | |
50 | [SWAP_ACTIVATING_SIGKILL] = UNIT_DEACTIVATING, | |
51 | [SWAP_DEACTIVATING_SIGTERM] = UNIT_DEACTIVATING, | |
52 | [SWAP_DEACTIVATING_SIGKILL] = UNIT_DEACTIVATING, | |
fdf20a31 | 53 | [SWAP_FAILED] = UNIT_FAILED |
07b0b134 ML |
54 | }; |
55 | ||
e04aad61 LP |
56 | static void swap_unset_proc_swaps(Swap *s) { |
57 | Swap *first; | |
df326b84 | 58 | Hashmap *swaps; |
e04aad61 LP |
59 | |
60 | assert(s); | |
61 | ||
62 | if (!s->parameters_proc_swaps.what) | |
63 | return; | |
64 | ||
65 | /* Remove this unit from the chain of swaps which share the | |
66 | * same kernel swap device. */ | |
df326b84 ZJS |
67 | swaps = UNIT(s)->manager->swaps_by_proc_swaps; |
68 | first = hashmap_get(swaps, s->parameters_proc_swaps.what); | |
71fda00f | 69 | LIST_REMOVE(same_proc_swaps, first, s); |
e04aad61 LP |
70 | |
71 | if (first) | |
df326b84 ZJS |
72 | hashmap_remove_and_replace(swaps, |
73 | s->parameters_proc_swaps.what, | |
74 | first->parameters_proc_swaps.what, | |
75 | first); | |
e04aad61 | 76 | else |
df326b84 | 77 | hashmap_remove(swaps, s->parameters_proc_swaps.what); |
e04aad61 LP |
78 | |
79 | free(s->parameters_proc_swaps.what); | |
80 | s->parameters_proc_swaps.what = NULL; | |
81 | } | |
82 | ||
f6cebb3b | 83 | static void swap_init(Unit *u) { |
6e620bec LP |
84 | Swap *s = SWAP(u); |
85 | ||
86 | assert(s); | |
1124fe6f | 87 | assert(UNIT(s)->load_state == UNIT_STUB); |
6e620bec | 88 | |
e04aad61 LP |
89 | s->timeout_usec = DEFAULT_TIMEOUT_USEC; |
90 | ||
91 | exec_context_init(&s->exec_context); | |
ac155bb8 MS |
92 | s->exec_context.std_output = u->manager->default_std_output; |
93 | s->exec_context.std_error = u->manager->default_std_error; | |
4819ff03 | 94 | kill_context_init(&s->kill_context); |
4ad49000 | 95 | cgroup_context_init(&s->cgroup_context); |
e04aad61 | 96 | |
6b1dc2bd | 97 | s->parameters_proc_swaps.priority = s->parameters_fragment.priority = -1; |
e04aad61 LP |
98 | |
99 | s->timer_watch.type = WATCH_INVALID; | |
100 | ||
e1770af8 | 101 | s->control_command_id = _SWAP_EXEC_COMMAND_INVALID; |
c8f4d764 | 102 | |
1124fe6f | 103 | UNIT(s)->ignore_on_isolate = true; |
e04aad61 LP |
104 | } |
105 | ||
106 | static void swap_unwatch_control_pid(Swap *s) { | |
107 | assert(s); | |
108 | ||
109 | if (s->control_pid <= 0) | |
110 | return; | |
111 | ||
112 | unit_unwatch_pid(UNIT(s), s->control_pid); | |
113 | s->control_pid = 0; | |
6e620bec LP |
114 | } |
115 | ||
4e85aff4 LP |
116 | static void swap_done(Unit *u) { |
117 | Swap *s = SWAP(u); | |
07b0b134 | 118 | |
4e85aff4 | 119 | assert(s); |
07b0b134 | 120 | |
e04aad61 LP |
121 | swap_unset_proc_swaps(s); |
122 | ||
4e85aff4 | 123 | free(s->what); |
e04aad61 LP |
124 | s->what = NULL; |
125 | ||
4e85aff4 | 126 | free(s->parameters_fragment.what); |
6b1dc2bd | 127 | s->parameters_fragment.what = NULL; |
e04aad61 | 128 | |
c17ec25e | 129 | exec_context_done(&s->exec_context, manager_is_reloading_or_reexecuting(u->manager)); |
e04aad61 LP |
130 | exec_command_done_array(s->exec_command, _SWAP_EXEC_COMMAND_MAX); |
131 | s->control_command = NULL; | |
132 | ||
4ad49000 LP |
133 | cgroup_context_done(&s->cgroup_context); |
134 | ||
e04aad61 LP |
135 | swap_unwatch_control_pid(s); |
136 | ||
137 | unit_unwatch_timer(u, &s->timer_watch); | |
07b0b134 ML |
138 | } |
139 | ||
173a8d04 LP |
140 | static int swap_add_device_links(Swap *s) { |
141 | SwapParameters *p; | |
142 | ||
143 | assert(s); | |
144 | ||
145 | if (!s->what) | |
146 | return 0; | |
147 | ||
148 | if (s->from_fragment) | |
149 | p = &s->parameters_fragment; | |
173a8d04 LP |
150 | else |
151 | return 0; | |
152 | ||
cfcfd4ae | 153 | if (is_device_path(s->what)) |
b56a422a | 154 | return unit_add_node_link(UNIT(s), s->what, !p->noauto && |
67445f4e | 155 | UNIT(s)->manager->running_as == SYSTEMD_SYSTEM); |
cfcfd4ae LP |
156 | else |
157 | /* File based swap devices need to be ordered after | |
2b93b027 | 158 | * systemd-remount-fs.service, since they might need a |
cfcfd4ae | 159 | * writable file system. */ |
2b93b027 | 160 | return unit_add_dependency_by_name(UNIT(s), UNIT_AFTER, SPECIAL_REMOUNT_FS_SERVICE, NULL, true); |
173a8d04 LP |
161 | } |
162 | ||
2edd4434 | 163 | static int swap_add_default_dependencies(Swap *s) { |
64347fc2 | 164 | bool nofail = false, noauto = false; |
2edd4434 LP |
165 | int r; |
166 | ||
167 | assert(s); | |
168 | ||
67445f4e | 169 | if (UNIT(s)->manager->running_as != SYSTEMD_SYSTEM) |
6b1dc2bd | 170 | return 0; |
2edd4434 | 171 | |
c0387ebf LP |
172 | if (detect_container(NULL) > 0) |
173 | return 0; | |
174 | ||
6b1dc2bd LP |
175 | r = unit_add_two_dependencies_by_name(UNIT(s), UNIT_BEFORE, UNIT_CONFLICTS, SPECIAL_UMOUNT_TARGET, NULL, true); |
176 | if (r < 0) | |
177 | return r; | |
2edd4434 | 178 | |
64347fc2 TG |
179 | if (s->from_fragment) { |
180 | SwapParameters *p = &s->parameters_fragment; | |
181 | ||
182 | nofail = p->nofail; | |
183 | noauto = p->noauto; | |
184 | } | |
185 | ||
186 | if (!noauto) { | |
4e82fe52 TG |
187 | if (nofail) |
188 | r = unit_add_dependency_by_name_inverse(UNIT(s), | |
189 | UNIT_WANTS, SPECIAL_SWAP_TARGET, NULL, true); | |
190 | else | |
191 | r = unit_add_two_dependencies_by_name_inverse(UNIT(s), | |
192 | UNIT_AFTER, UNIT_REQUIRES, SPECIAL_SWAP_TARGET, NULL, true); | |
64347fc2 TG |
193 | if (r < 0) |
194 | return r; | |
195 | } | |
196 | ||
2edd4434 LP |
197 | return 0; |
198 | } | |
199 | ||
4e85aff4 LP |
200 | static int swap_verify(Swap *s) { |
201 | bool b; | |
7fd1b19b | 202 | _cleanup_free_ char *e = NULL; |
4e85aff4 | 203 | |
1124fe6f | 204 | if (UNIT(s)->load_state != UNIT_LOADED) |
4e85aff4 LP |
205 | return 0; |
206 | ||
170ca19e ZJS |
207 | e = unit_name_from_path(s->what, ".swap"); |
208 | if (e == NULL) | |
209 | return log_oom(); | |
4e85aff4 LP |
210 | |
211 | b = unit_has_name(UNIT(s), e); | |
4e85aff4 | 212 | if (!b) { |
66870f90 ZJS |
213 | log_error_unit(UNIT(s)->id, |
214 | "%s: Value of \"What\" and unit name do not match, not loading.", | |
215 | UNIT(s)->id); | |
4e85aff4 LP |
216 | return -EINVAL; |
217 | } | |
218 | ||
4819ff03 | 219 | if (s->exec_context.pam_name && s->kill_context.kill_mode != KILL_CONTROL_GROUP) { |
66870f90 ZJS |
220 | log_error_unit(UNIT(s)->id, |
221 | "%s has PAM enabled. Kill mode must be set to 'control-group'. Refusing to load.", | |
222 | UNIT(s)->id); | |
e04aad61 LP |
223 | return -EINVAL; |
224 | } | |
225 | ||
4e85aff4 LP |
226 | return 0; |
227 | } | |
228 | ||
07b0b134 ML |
229 | static int swap_load(Unit *u) { |
230 | int r; | |
231 | Swap *s = SWAP(u); | |
232 | ||
233 | assert(s); | |
ac155bb8 | 234 | assert(u->load_state == UNIT_STUB); |
07b0b134 ML |
235 | |
236 | /* Load a .swap file */ | |
646134dc ZJS |
237 | r = unit_load_fragment_and_dropin_optional(u); |
238 | if (r < 0) | |
07b0b134 ML |
239 | return r; |
240 | ||
ac155bb8 | 241 | if (u->load_state == UNIT_LOADED) { |
646134dc ZJS |
242 | r = unit_add_exec_dependencies(u, &s->exec_context); |
243 | if (r < 0) | |
27abbe82 | 244 | return r; |
4e85aff4 | 245 | |
1124fe6f | 246 | if (UNIT(s)->fragment_path) |
4e85aff4 LP |
247 | s->from_fragment = true; |
248 | ||
249 | if (!s->what) { | |
250 | if (s->parameters_fragment.what) | |
251 | s->what = strdup(s->parameters_fragment.what); | |
4e85aff4 LP |
252 | else if (s->parameters_proc_swaps.what) |
253 | s->what = strdup(s->parameters_proc_swaps.what); | |
254 | else | |
ac155bb8 | 255 | s->what = unit_name_to_path(u->id); |
4e85aff4 LP |
256 | |
257 | if (!s->what) | |
07b0b134 | 258 | return -ENOMEM; |
4e85aff4 | 259 | } |
07b0b134 ML |
260 | |
261 | path_kill_slashes(s->what); | |
262 | ||
1124fe6f | 263 | if (!UNIT(s)->description) |
4e85aff4 LP |
264 | if ((r = unit_set_description(u, s->what)) < 0) |
265 | return r; | |
266 | ||
a57f7e2c | 267 | r = unit_require_mounts_for(UNIT(s), s->what); |
646134dc | 268 | if (r < 0) |
07b0b134 ML |
269 | return r; |
270 | ||
a57f7e2c | 271 | r = swap_add_device_links(s); |
646134dc | 272 | if (r < 0) |
6e2ef85b | 273 | return r; |
07b0b134 | 274 | |
a016b922 LP |
275 | r = unit_add_default_slice(u); |
276 | if (r < 0) | |
277 | return r; | |
278 | ||
646134dc ZJS |
279 | if (UNIT(s)->default_dependencies) { |
280 | r = swap_add_default_dependencies(s); | |
281 | if (r < 0) | |
2edd4434 | 282 | return r; |
646134dc | 283 | } |
e06c73cc | 284 | |
cba6e062 | 285 | r = unit_exec_context_defaults(u, &s->exec_context); |
e06c73cc LP |
286 | if (r < 0) |
287 | return r; | |
07b0b134 ML |
288 | } |
289 | ||
290 | return swap_verify(s); | |
291 | } | |
292 | ||
6b1dc2bd | 293 | static int swap_add_one( |
4e85aff4 LP |
294 | Manager *m, |
295 | const char *what, | |
e04aad61 | 296 | const char *what_proc_swaps, |
4e85aff4 LP |
297 | int priority, |
298 | bool noauto, | |
173a8d04 | 299 | bool nofail, |
e04aad61 LP |
300 | bool set_flags) { |
301 | ||
4e85aff4 | 302 | Unit *u = NULL; |
7fd1b19b | 303 | _cleanup_free_ char *e = NULL; |
170ca19e | 304 | char *wp = NULL; |
2c7c6144 | 305 | bool delete = false; |
07b0b134 | 306 | int r; |
4e85aff4 | 307 | SwapParameters *p; |
6b1dc2bd | 308 | Swap *first; |
4e85aff4 LP |
309 | |
310 | assert(m); | |
311 | assert(what); | |
6b1dc2bd | 312 | assert(what_proc_swaps); |
07b0b134 | 313 | |
7d17cfbc MS |
314 | e = unit_name_from_path(what, ".swap"); |
315 | if (!e) | |
170ca19e | 316 | return log_oom(); |
07b0b134 | 317 | |
e04aad61 LP |
318 | u = manager_get_unit(m, e); |
319 | ||
6b1dc2bd | 320 | if (u && |
e04aad61 LP |
321 | SWAP(u)->from_proc_swaps && |
322 | !path_equal(SWAP(u)->parameters_proc_swaps.what, what_proc_swaps)) | |
323 | return -EEXIST; | |
4e85aff4 LP |
324 | |
325 | if (!u) { | |
07b0b134 ML |
326 | delete = true; |
327 | ||
7d17cfbc | 328 | u = unit_new(m, sizeof(Swap)); |
170ca19e ZJS |
329 | if (!u) |
330 | return log_oom(); | |
e04aad61 | 331 | |
7d17cfbc MS |
332 | r = unit_add_name(u, e); |
333 | if (r < 0) | |
e04aad61 LP |
334 | goto fail; |
335 | ||
7d17cfbc MS |
336 | SWAP(u)->what = strdup(what); |
337 | if (!SWAP(u)->what) { | |
646134dc | 338 | r = log_oom(); |
e04aad61 LP |
339 | goto fail; |
340 | } | |
341 | ||
342 | unit_add_to_load_queue(u); | |
4e85aff4 LP |
343 | } else |
344 | delete = false; | |
07b0b134 | 345 | |
6b1dc2bd | 346 | p = &SWAP(u)->parameters_proc_swaps; |
07b0b134 | 347 | |
6b1dc2bd | 348 | if (!p->what) { |
646134dc ZJS |
349 | wp = strdup(what_proc_swaps); |
350 | if (!wp) { | |
351 | r = log_oom(); | |
6b1dc2bd LP |
352 | goto fail; |
353 | } | |
e04aad61 | 354 | |
646134dc ZJS |
355 | if (!m->swaps_by_proc_swaps) { |
356 | m->swaps_by_proc_swaps = hashmap_new(string_hash_func, string_compare_func); | |
357 | if (!m->swaps_by_proc_swaps) { | |
358 | r = log_oom(); | |
e04aad61 LP |
359 | goto fail; |
360 | } | |
646134dc | 361 | } |
e04aad61 | 362 | |
6b1dc2bd LP |
363 | free(p->what); |
364 | p->what = wp; | |
e04aad61 | 365 | |
6b1dc2bd | 366 | first = hashmap_get(m->swaps_by_proc_swaps, wp); |
71fda00f | 367 | LIST_PREPEND(same_proc_swaps, first, SWAP(u)); |
e04aad61 | 368 | |
646134dc ZJS |
369 | r = hashmap_replace(m->swaps_by_proc_swaps, wp, first); |
370 | if (r < 0) | |
e04aad61 | 371 | goto fail; |
6b1dc2bd | 372 | } |
e04aad61 | 373 | |
6b1dc2bd LP |
374 | if (set_flags) { |
375 | SWAP(u)->is_active = true; | |
376 | SWAP(u)->just_activated = !SWAP(u)->from_proc_swaps; | |
4e85aff4 | 377 | } |
07b0b134 | 378 | |
6b1dc2bd LP |
379 | SWAP(u)->from_proc_swaps = true; |
380 | ||
4e85aff4 LP |
381 | p->priority = priority; |
382 | p->noauto = noauto; | |
173a8d04 | 383 | p->nofail = nofail; |
07b0b134 | 384 | |
4e85aff4 | 385 | unit_add_to_dbus_queue(u); |
07b0b134 | 386 | |
07b0b134 ML |
387 | return 0; |
388 | ||
389 | fail: | |
66870f90 | 390 | log_warning_unit(e, "Failed to load swap unit: %s", strerror(-r)); |
e04aad61 LP |
391 | |
392 | free(wp); | |
4e85aff4 LP |
393 | |
394 | if (delete && u) | |
07b0b134 ML |
395 | unit_free(u); |
396 | ||
4e85aff4 | 397 | return r; |
07b0b134 ML |
398 | } |
399 | ||
e04aad61 LP |
400 | static int swap_process_new_swap(Manager *m, const char *device, int prio, bool set_flags) { |
401 | struct stat st; | |
402 | int r = 0, k; | |
403 | ||
404 | assert(m); | |
405 | ||
406 | if (stat(device, &st) >= 0 && S_ISBLK(st.st_mode)) { | |
407 | struct udev_device *d; | |
408 | const char *dn; | |
409 | struct udev_list_entry *item = NULL, *first = NULL; | |
410 | ||
411 | /* So this is a proper swap device. Create swap units | |
412 | * for all names this swap device is known under */ | |
413 | ||
646134dc ZJS |
414 | d = udev_device_new_from_devnum(m->udev, 'b', st.st_rdev); |
415 | if (!d) | |
416 | return log_oom(); | |
e04aad61 | 417 | |
8d8e9456 | 418 | dn = udev_device_get_devnode(d); |
b61e8816 OB |
419 | /* Skip dn==device, since that case will be handled below */ |
420 | if (dn && !streq(dn, device)) | |
8d8e9456 | 421 | r = swap_add_one(m, dn, device, prio, false, false, set_flags); |
e04aad61 LP |
422 | |
423 | /* Add additional units for all symlinks */ | |
424 | first = udev_device_get_devlinks_list_entry(d); | |
425 | udev_list_entry_foreach(item, first) { | |
426 | const char *p; | |
427 | ||
428 | /* Don't bother with the /dev/block links */ | |
429 | p = udev_list_entry_get_name(item); | |
430 | ||
431 | if (path_startswith(p, "/dev/block/")) | |
432 | continue; | |
433 | ||
434 | if (stat(p, &st) >= 0) | |
646134dc ZJS |
435 | if ((!S_ISBLK(st.st_mode)) || |
436 | st.st_rdev != udev_device_get_devnum(d)) | |
e04aad61 LP |
437 | continue; |
438 | ||
8d8e9456 LP |
439 | k = swap_add_one(m, p, device, prio, false, false, set_flags); |
440 | if (k < 0) | |
e04aad61 LP |
441 | r = k; |
442 | } | |
443 | ||
444 | udev_device_unref(d); | |
445 | } | |
446 | ||
8d8e9456 LP |
447 | k = swap_add_one(m, device, device, prio, false, false, set_flags); |
448 | if (k < 0) | |
e04aad61 LP |
449 | r = k; |
450 | ||
451 | return r; | |
452 | } | |
453 | ||
07b0b134 ML |
454 | static void swap_set_state(Swap *s, SwapState state) { |
455 | SwapState old_state; | |
e04aad61 | 456 | |
07b0b134 ML |
457 | assert(s); |
458 | ||
459 | old_state = s->state; | |
460 | s->state = state; | |
461 | ||
e04aad61 LP |
462 | if (state != SWAP_ACTIVATING && |
463 | state != SWAP_ACTIVATING_SIGTERM && | |
464 | state != SWAP_ACTIVATING_SIGKILL && | |
465 | state != SWAP_DEACTIVATING && | |
466 | state != SWAP_DEACTIVATING_SIGTERM && | |
467 | state != SWAP_DEACTIVATING_SIGKILL) { | |
468 | unit_unwatch_timer(UNIT(s), &s->timer_watch); | |
469 | swap_unwatch_control_pid(s); | |
470 | s->control_command = NULL; | |
471 | s->control_command_id = _SWAP_EXEC_COMMAND_INVALID; | |
472 | } | |
473 | ||
07b0b134 | 474 | if (state != old_state) |
66870f90 ZJS |
475 | log_debug_unit(UNIT(s)->id, |
476 | "%s changed %s -> %s", | |
477 | UNIT(s)->id, | |
478 | swap_state_to_string(old_state), | |
479 | swap_state_to_string(state)); | |
07b0b134 | 480 | |
646134dc ZJS |
481 | unit_notify(UNIT(s), state_translation_table[old_state], |
482 | state_translation_table[state], true); | |
07b0b134 ML |
483 | } |
484 | ||
485 | static int swap_coldplug(Unit *u) { | |
486 | Swap *s = SWAP(u); | |
487 | SwapState new_state = SWAP_DEAD; | |
e04aad61 | 488 | int r; |
07b0b134 ML |
489 | |
490 | assert(s); | |
491 | assert(s->state == SWAP_DEAD); | |
492 | ||
493 | if (s->deserialized_state != s->state) | |
494 | new_state = s->deserialized_state; | |
4e85aff4 | 495 | else if (s->from_proc_swaps) |
07b0b134 ML |
496 | new_state = SWAP_ACTIVE; |
497 | ||
e04aad61 LP |
498 | if (new_state != s->state) { |
499 | ||
500 | if (new_state == SWAP_ACTIVATING || | |
501 | new_state == SWAP_ACTIVATING_SIGTERM || | |
502 | new_state == SWAP_ACTIVATING_SIGKILL || | |
503 | new_state == SWAP_DEACTIVATING || | |
504 | new_state == SWAP_DEACTIVATING_SIGTERM || | |
505 | new_state == SWAP_DEACTIVATING_SIGKILL) { | |
506 | ||
507 | if (s->control_pid <= 0) | |
508 | return -EBADMSG; | |
509 | ||
646134dc ZJS |
510 | r = unit_watch_pid(UNIT(s), s->control_pid); |
511 | if (r < 0) | |
e04aad61 LP |
512 | return r; |
513 | ||
36697dc0 | 514 | r = unit_watch_timer(UNIT(s), CLOCK_MONOTONIC, true, s->timeout_usec, &s->timer_watch); |
646134dc | 515 | if (r < 0) |
e04aad61 LP |
516 | return r; |
517 | } | |
518 | ||
4e85aff4 | 519 | swap_set_state(s, new_state); |
e04aad61 | 520 | } |
07b0b134 ML |
521 | |
522 | return 0; | |
523 | } | |
524 | ||
525 | static void swap_dump(Unit *u, FILE *f, const char *prefix) { | |
526 | Swap *s = SWAP(u); | |
4e85aff4 | 527 | SwapParameters *p; |
07b0b134 ML |
528 | |
529 | assert(s); | |
4e85aff4 LP |
530 | assert(f); |
531 | ||
532 | if (s->from_proc_swaps) | |
533 | p = &s->parameters_proc_swaps; | |
534 | else if (s->from_fragment) | |
535 | p = &s->parameters_fragment; | |
b6bfc7bb LP |
536 | else |
537 | p = NULL; | |
07b0b134 ML |
538 | |
539 | fprintf(f, | |
4e85aff4 | 540 | "%sSwap State: %s\n" |
e1770af8 | 541 | "%sResult: %s\n" |
07b0b134 | 542 | "%sWhat: %s\n" |
4e85aff4 LP |
543 | "%sFrom /proc/swaps: %s\n" |
544 | "%sFrom fragment: %s\n", | |
07b0b134 | 545 | prefix, swap_state_to_string(s->state), |
e1770af8 | 546 | prefix, swap_result_to_string(s->result), |
07b0b134 | 547 | prefix, s->what, |
4e85aff4 LP |
548 | prefix, yes_no(s->from_proc_swaps), |
549 | prefix, yes_no(s->from_fragment)); | |
e04aad61 | 550 | |
b6bfc7bb LP |
551 | if (p) |
552 | fprintf(f, | |
553 | "%sPriority: %i\n" | |
554 | "%sNoAuto: %s\n" | |
555 | "%sNoFail: %s\n", | |
556 | prefix, p->priority, | |
557 | prefix, yes_no(p->noauto), | |
558 | prefix, yes_no(p->nofail)); | |
559 | ||
e04aad61 LP |
560 | if (s->control_pid > 0) |
561 | fprintf(f, | |
562 | "%sControl PID: %lu\n", | |
563 | prefix, (unsigned long) s->control_pid); | |
564 | ||
565 | exec_context_dump(&s->exec_context, f, prefix); | |
4819ff03 | 566 | kill_context_dump(&s->kill_context, f, prefix); |
e04aad61 LP |
567 | } |
568 | ||
569 | static int swap_spawn(Swap *s, ExecCommand *c, pid_t *_pid) { | |
570 | pid_t pid; | |
571 | int r; | |
572 | ||
573 | assert(s); | |
574 | assert(c); | |
575 | assert(_pid); | |
576 | ||
4ad49000 LP |
577 | unit_realize_cgroup(UNIT(s)); |
578 | ||
36697dc0 | 579 | r = unit_watch_timer(UNIT(s), CLOCK_MONOTONIC, true, s->timeout_usec, &s->timer_watch); |
646134dc | 580 | if (r < 0) |
e04aad61 LP |
581 | goto fail; |
582 | ||
646134dc ZJS |
583 | r = exec_spawn(c, |
584 | NULL, | |
585 | &s->exec_context, | |
586 | NULL, 0, | |
587 | UNIT(s)->manager->environment, | |
588 | true, | |
589 | true, | |
590 | true, | |
591 | UNIT(s)->manager->confirm_spawn, | |
13b84ec7 | 592 | UNIT(s)->manager->cgroup_supported, |
4ad49000 | 593 | UNIT(s)->cgroup_path, |
646134dc ZJS |
594 | UNIT(s)->id, |
595 | NULL, | |
596 | &pid); | |
597 | if (r < 0) | |
e04aad61 LP |
598 | goto fail; |
599 | ||
646134dc ZJS |
600 | r = unit_watch_pid(UNIT(s), pid); |
601 | if (r < 0) | |
e04aad61 LP |
602 | /* FIXME: we need to do something here */ |
603 | goto fail; | |
604 | ||
605 | *_pid = pid; | |
606 | ||
607 | return 0; | |
608 | ||
609 | fail: | |
610 | unit_unwatch_timer(UNIT(s), &s->timer_watch); | |
611 | ||
612 | return r; | |
07b0b134 ML |
613 | } |
614 | ||
e1770af8 | 615 | static void swap_enter_dead(Swap *s, SwapResult f) { |
07b0b134 ML |
616 | assert(s); |
617 | ||
e1770af8 LP |
618 | if (f != SWAP_SUCCESS) |
619 | s->result = f; | |
e04aad61 | 620 | |
c17ec25e | 621 | exec_context_tmp_dirs_done(&s->exec_context); |
e1770af8 | 622 | swap_set_state(s, s->result != SWAP_SUCCESS ? SWAP_FAILED : SWAP_DEAD); |
07b0b134 ML |
623 | } |
624 | ||
e1770af8 | 625 | static void swap_enter_active(Swap *s, SwapResult f) { |
e04aad61 LP |
626 | assert(s); |
627 | ||
e1770af8 LP |
628 | if (f != SWAP_SUCCESS) |
629 | s->result = f; | |
e04aad61 LP |
630 | |
631 | swap_set_state(s, SWAP_ACTIVE); | |
632 | } | |
633 | ||
e1770af8 | 634 | static void swap_enter_signal(Swap *s, SwapState state, SwapResult f) { |
07b0b134 ML |
635 | int r; |
636 | ||
637 | assert(s); | |
e04aad61 | 638 | |
e1770af8 LP |
639 | if (f != SWAP_SUCCESS) |
640 | s->result = f; | |
e04aad61 | 641 | |
cd2086fe LP |
642 | r = unit_kill_context( |
643 | UNIT(s), | |
644 | &s->kill_context, | |
645 | state != SWAP_ACTIVATING_SIGTERM && state != SWAP_DEACTIVATING_SIGTERM, | |
646 | -1, | |
647 | s->control_pid, | |
648 | false); | |
649 | if (r < 0) | |
650 | goto fail; | |
e04aad61 | 651 | |
cd2086fe | 652 | if (r > 0) { |
36697dc0 | 653 | r = unit_watch_timer(UNIT(s), CLOCK_MONOTONIC, true, s->timeout_usec, &s->timer_watch); |
646134dc | 654 | if (r < 0) |
e04aad61 LP |
655 | goto fail; |
656 | ||
657 | swap_set_state(s, state); | |
658 | } else | |
e1770af8 | 659 | swap_enter_dead(s, SWAP_SUCCESS); |
e04aad61 LP |
660 | |
661 | return; | |
662 | ||
663 | fail: | |
66870f90 ZJS |
664 | log_warning_unit(UNIT(s)->id, |
665 | "%s failed to kill processes: %s", UNIT(s)->id, strerror(-r)); | |
e04aad61 | 666 | |
e1770af8 | 667 | swap_enter_dead(s, SWAP_FAILURE_RESOURCES); |
e04aad61 LP |
668 | } |
669 | ||
670 | static void swap_enter_activating(Swap *s) { | |
671 | int r, priority; | |
672 | ||
673 | assert(s); | |
674 | ||
675 | s->control_command_id = SWAP_EXEC_ACTIVATE; | |
676 | s->control_command = s->exec_command + SWAP_EXEC_ACTIVATE; | |
07b0b134 | 677 | |
4e85aff4 LP |
678 | if (s->from_fragment) |
679 | priority = s->parameters_fragment.priority; | |
e04aad61 LP |
680 | else |
681 | priority = -1; | |
4e85aff4 | 682 | |
e04aad61 LP |
683 | if (priority >= 0) { |
684 | char p[LINE_MAX]; | |
07b0b134 | 685 | |
e04aad61 LP |
686 | snprintf(p, sizeof(p), "%i", priority); |
687 | char_array_0(p); | |
07b0b134 | 688 | |
e04aad61 LP |
689 | r = exec_command_set( |
690 | s->control_command, | |
691 | "/sbin/swapon", | |
692 | "-p", | |
693 | p, | |
694 | s->what, | |
695 | NULL); | |
696 | } else | |
697 | r = exec_command_set( | |
698 | s->control_command, | |
699 | "/sbin/swapon", | |
700 | s->what, | |
701 | NULL); | |
702 | ||
703 | if (r < 0) | |
704 | goto fail; | |
705 | ||
706 | swap_unwatch_control_pid(s); | |
707 | ||
646134dc ZJS |
708 | r = swap_spawn(s, s->control_command, &s->control_pid); |
709 | if (r < 0) | |
e04aad61 LP |
710 | goto fail; |
711 | ||
712 | swap_set_state(s, SWAP_ACTIVATING); | |
713 | ||
714 | return; | |
715 | ||
716 | fail: | |
66870f90 ZJS |
717 | log_warning_unit(UNIT(s)->id, |
718 | "%s failed to run 'swapon' task: %s", | |
719 | UNIT(s)->id, strerror(-r)); | |
e1770af8 | 720 | swap_enter_dead(s, SWAP_FAILURE_RESOURCES); |
e04aad61 LP |
721 | } |
722 | ||
e1770af8 | 723 | static void swap_enter_deactivating(Swap *s) { |
e04aad61 LP |
724 | int r; |
725 | ||
726 | assert(s); | |
727 | ||
e04aad61 LP |
728 | s->control_command_id = SWAP_EXEC_DEACTIVATE; |
729 | s->control_command = s->exec_command + SWAP_EXEC_DEACTIVATE; | |
730 | ||
646134dc | 731 | r = exec_command_set(s->control_command, |
e04aad61 LP |
732 | "/sbin/swapoff", |
733 | s->what, | |
646134dc ZJS |
734 | NULL); |
735 | if (r < 0) | |
e04aad61 LP |
736 | goto fail; |
737 | ||
738 | swap_unwatch_control_pid(s); | |
739 | ||
646134dc ZJS |
740 | r = swap_spawn(s, s->control_command, &s->control_pid); |
741 | if (r < 0) | |
e04aad61 LP |
742 | goto fail; |
743 | ||
744 | swap_set_state(s, SWAP_DEACTIVATING); | |
745 | ||
746 | return; | |
747 | ||
748 | fail: | |
66870f90 ZJS |
749 | log_warning_unit(UNIT(s)->id, |
750 | "%s failed to run 'swapoff' task: %s", | |
751 | UNIT(s)->id, strerror(-r)); | |
e1770af8 | 752 | swap_enter_active(s, SWAP_FAILURE_RESOURCES); |
e04aad61 LP |
753 | } |
754 | ||
755 | static int swap_start(Unit *u) { | |
756 | Swap *s = SWAP(u); | |
757 | ||
758 | assert(s); | |
759 | ||
760 | /* We cannot fulfill this request right now, try again later | |
761 | * please! */ | |
762 | ||
763 | if (s->state == SWAP_DEACTIVATING || | |
764 | s->state == SWAP_DEACTIVATING_SIGTERM || | |
765 | s->state == SWAP_DEACTIVATING_SIGKILL || | |
766 | s->state == SWAP_ACTIVATING_SIGTERM || | |
767 | s->state == SWAP_ACTIVATING_SIGKILL) | |
768 | return -EAGAIN; | |
769 | ||
770 | if (s->state == SWAP_ACTIVATING) | |
771 | return 0; | |
772 | ||
773 | assert(s->state == SWAP_DEAD || s->state == SWAP_FAILED); | |
774 | ||
a5c3034f LP |
775 | if (detect_container(NULL) > 0) |
776 | return -EPERM; | |
777 | ||
e1770af8 | 778 | s->result = SWAP_SUCCESS; |
e04aad61 | 779 | swap_enter_activating(s); |
07b0b134 ML |
780 | return 0; |
781 | } | |
782 | ||
783 | static int swap_stop(Unit *u) { | |
784 | Swap *s = SWAP(u); | |
07b0b134 ML |
785 | |
786 | assert(s); | |
787 | ||
e04aad61 LP |
788 | if (s->state == SWAP_DEACTIVATING || |
789 | s->state == SWAP_DEACTIVATING_SIGTERM || | |
790 | s->state == SWAP_DEACTIVATING_SIGKILL || | |
791 | s->state == SWAP_ACTIVATING_SIGTERM || | |
792 | s->state == SWAP_ACTIVATING_SIGKILL) | |
793 | return 0; | |
07b0b134 | 794 | |
e04aad61 LP |
795 | assert(s->state == SWAP_ACTIVATING || |
796 | s->state == SWAP_ACTIVE); | |
07b0b134 | 797 | |
a5c3034f LP |
798 | if (detect_container(NULL) > 0) |
799 | return -EPERM; | |
800 | ||
e1770af8 | 801 | swap_enter_deactivating(s); |
07b0b134 ML |
802 | return 0; |
803 | } | |
804 | ||
805 | static int swap_serialize(Unit *u, FILE *f, FDSet *fds) { | |
806 | Swap *s = SWAP(u); | |
807 | ||
808 | assert(s); | |
809 | assert(f); | |
810 | assert(fds); | |
811 | ||
812 | unit_serialize_item(u, f, "state", swap_state_to_string(s->state)); | |
e1770af8 | 813 | unit_serialize_item(u, f, "result", swap_result_to_string(s->result)); |
e04aad61 LP |
814 | |
815 | if (s->control_pid > 0) | |
816 | unit_serialize_item_format(u, f, "control-pid", "%lu", (unsigned long) s->control_pid); | |
817 | ||
818 | if (s->control_command_id >= 0) | |
819 | unit_serialize_item(u, f, "control-command", swap_exec_command_to_string(s->control_command_id)); | |
07b0b134 | 820 | |
c17ec25e MS |
821 | exec_context_serialize(&s->exec_context, UNIT(s), f); |
822 | ||
07b0b134 ML |
823 | return 0; |
824 | } | |
825 | ||
826 | static int swap_deserialize_item(Unit *u, const char *key, const char *value, FDSet *fds) { | |
827 | Swap *s = SWAP(u); | |
828 | ||
829 | assert(s); | |
830 | assert(fds); | |
831 | ||
832 | if (streq(key, "state")) { | |
833 | SwapState state; | |
834 | ||
646134dc ZJS |
835 | state = swap_state_from_string(value); |
836 | if (state < 0) | |
66870f90 | 837 | log_debug_unit(u->id, "Failed to parse state value %s", value); |
07b0b134 ML |
838 | else |
839 | s->deserialized_state = state; | |
e1770af8 LP |
840 | } else if (streq(key, "result")) { |
841 | SwapResult f; | |
842 | ||
843 | f = swap_result_from_string(value); | |
844 | if (f < 0) | |
66870f90 | 845 | log_debug_unit(u->id, "Failed to parse result value %s", value); |
e1770af8 LP |
846 | else if (f != SWAP_SUCCESS) |
847 | s->result = f; | |
e04aad61 LP |
848 | } else if (streq(key, "control-pid")) { |
849 | pid_t pid; | |
850 | ||
851 | if (parse_pid(value, &pid) < 0) | |
66870f90 | 852 | log_debug_unit(u->id, "Failed to parse control-pid value %s", value); |
e04aad61 LP |
853 | else |
854 | s->control_pid = pid; | |
855 | ||
856 | } else if (streq(key, "control-command")) { | |
857 | SwapExecCommand id; | |
858 | ||
646134dc ZJS |
859 | id = swap_exec_command_from_string(value); |
860 | if (id < 0) | |
66870f90 | 861 | log_debug_unit(u->id, "Failed to parse exec-command value %s", value); |
e04aad61 LP |
862 | else { |
863 | s->control_command_id = id; | |
864 | s->control_command = s->exec_command + id; | |
865 | } | |
c17ec25e MS |
866 | } else if (streq(key, "tmp-dir")) { |
867 | char *t; | |
868 | ||
869 | t = strdup(value); | |
870 | if (!t) | |
871 | return log_oom(); | |
872 | ||
873 | s->exec_context.tmp_dir = t; | |
874 | } else if (streq(key, "var-tmp-dir")) { | |
875 | char *t; | |
876 | ||
877 | t = strdup(value); | |
878 | if (!t) | |
879 | return log_oom(); | |
e04aad61 | 880 | |
c17ec25e | 881 | s->exec_context.var_tmp_dir = t; |
07b0b134 | 882 | } else |
66870f90 | 883 | log_debug_unit(u->id, "Unknown serialization key '%s'", key); |
07b0b134 ML |
884 | |
885 | return 0; | |
886 | } | |
887 | ||
44a6b1b6 | 888 | _pure_ static UnitActiveState swap_active_state(Unit *u) { |
07b0b134 ML |
889 | assert(u); |
890 | ||
891 | return state_translation_table[SWAP(u)->state]; | |
892 | } | |
893 | ||
44a6b1b6 | 894 | _pure_ static const char *swap_sub_state_to_string(Unit *u) { |
07b0b134 ML |
895 | assert(u); |
896 | ||
897 | return swap_state_to_string(SWAP(u)->state); | |
898 | } | |
899 | ||
44a6b1b6 | 900 | _pure_ static bool swap_check_gc(Unit *u) { |
07b0b134 ML |
901 | Swap *s = SWAP(u); |
902 | ||
903 | assert(s); | |
904 | ||
6b1dc2bd | 905 | return s->from_proc_swaps; |
07b0b134 ML |
906 | } |
907 | ||
e04aad61 LP |
908 | static void swap_sigchld_event(Unit *u, pid_t pid, int code, int status) { |
909 | Swap *s = SWAP(u); | |
e1770af8 | 910 | SwapResult f; |
e04aad61 LP |
911 | |
912 | assert(s); | |
913 | assert(pid >= 0); | |
914 | ||
915 | if (pid != s->control_pid) | |
916 | return; | |
917 | ||
918 | s->control_pid = 0; | |
919 | ||
96342de6 | 920 | if (is_clean_exit(code, status, NULL)) |
e1770af8 LP |
921 | f = SWAP_SUCCESS; |
922 | else if (code == CLD_EXITED) | |
923 | f = SWAP_FAILURE_EXIT_CODE; | |
924 | else if (code == CLD_KILLED) | |
925 | f = SWAP_FAILURE_SIGNAL; | |
926 | else if (code == CLD_DUMPED) | |
927 | f = SWAP_FAILURE_CORE_DUMP; | |
928 | else | |
929 | assert_not_reached("Unknown code"); | |
930 | ||
931 | if (f != SWAP_SUCCESS) | |
932 | s->result = f; | |
e04aad61 LP |
933 | |
934 | if (s->control_command) { | |
6ea832a2 | 935 | exec_status_exit(&s->control_command->exec_status, &s->exec_context, pid, code, status); |
e1770af8 | 936 | |
e04aad61 LP |
937 | s->control_command = NULL; |
938 | s->control_command_id = _SWAP_EXEC_COMMAND_INVALID; | |
939 | } | |
940 | ||
66870f90 ZJS |
941 | log_full_unit(f == SWAP_SUCCESS ? LOG_DEBUG : LOG_NOTICE, |
942 | u->id, | |
943 | "%s swap process exited, code=%s status=%i", | |
944 | u->id, sigchld_code_to_string(code), status); | |
e04aad61 LP |
945 | |
946 | switch (s->state) { | |
947 | ||
948 | case SWAP_ACTIVATING: | |
949 | case SWAP_ACTIVATING_SIGTERM: | |
950 | case SWAP_ACTIVATING_SIGKILL: | |
951 | ||
e1770af8 LP |
952 | if (f == SWAP_SUCCESS) |
953 | swap_enter_active(s, f); | |
e04aad61 | 954 | else |
e1770af8 | 955 | swap_enter_dead(s, f); |
e04aad61 LP |
956 | break; |
957 | ||
958 | case SWAP_DEACTIVATING: | |
959 | case SWAP_DEACTIVATING_SIGKILL: | |
960 | case SWAP_DEACTIVATING_SIGTERM: | |
961 | ||
e1770af8 LP |
962 | if (f == SWAP_SUCCESS) |
963 | swap_enter_dead(s, f); | |
e04aad61 | 964 | else |
e1770af8 | 965 | swap_enter_dead(s, f); |
e04aad61 LP |
966 | break; |
967 | ||
968 | default: | |
969 | assert_not_reached("Uh, control process died at wrong time."); | |
970 | } | |
971 | ||
972 | /* Notify clients about changed exit status */ | |
973 | unit_add_to_dbus_queue(u); | |
974 | ||
975 | /* Request a reload of /proc/swaps, so that following units | |
976 | * can follow our state change */ | |
ac155bb8 | 977 | u->manager->request_reload = true; |
e04aad61 LP |
978 | } |
979 | ||
980 | static void swap_timer_event(Unit *u, uint64_t elapsed, Watch *w) { | |
981 | Swap *s = SWAP(u); | |
982 | ||
983 | assert(s); | |
984 | assert(elapsed == 1); | |
985 | assert(w == &s->timer_watch); | |
986 | ||
987 | switch (s->state) { | |
988 | ||
989 | case SWAP_ACTIVATING: | |
66870f90 | 990 | log_warning_unit(u->id, "%s activation timed out. Stopping.", u->id); |
e1770af8 | 991 | swap_enter_signal(s, SWAP_ACTIVATING_SIGTERM, SWAP_FAILURE_TIMEOUT); |
e04aad61 LP |
992 | break; |
993 | ||
994 | case SWAP_DEACTIVATING: | |
66870f90 | 995 | log_warning_unit(u->id, "%s deactivation timed out. Stopping.", u->id); |
e1770af8 | 996 | swap_enter_signal(s, SWAP_DEACTIVATING_SIGTERM, SWAP_FAILURE_TIMEOUT); |
e04aad61 LP |
997 | break; |
998 | ||
999 | case SWAP_ACTIVATING_SIGTERM: | |
4819ff03 | 1000 | if (s->kill_context.send_sigkill) { |
66870f90 | 1001 | log_warning_unit(u->id, "%s activation timed out. Killing.", u->id); |
e1770af8 | 1002 | swap_enter_signal(s, SWAP_ACTIVATING_SIGKILL, SWAP_FAILURE_TIMEOUT); |
ba035df2 | 1003 | } else { |
66870f90 | 1004 | log_warning_unit(u->id, "%s activation timed out. Skipping SIGKILL. Ignoring.", u->id); |
e1770af8 | 1005 | swap_enter_dead(s, SWAP_FAILURE_TIMEOUT); |
ba035df2 | 1006 | } |
e04aad61 LP |
1007 | break; |
1008 | ||
1009 | case SWAP_DEACTIVATING_SIGTERM: | |
4819ff03 | 1010 | if (s->kill_context.send_sigkill) { |
66870f90 | 1011 | log_warning_unit(u->id, "%s deactivation timed out. Killing.", u->id); |
e1770af8 | 1012 | swap_enter_signal(s, SWAP_DEACTIVATING_SIGKILL, SWAP_FAILURE_TIMEOUT); |
ba035df2 | 1013 | } else { |
66870f90 | 1014 | log_warning_unit(u->id, "%s deactivation timed out. Skipping SIGKILL. Ignoring.", u->id); |
e1770af8 | 1015 | swap_enter_dead(s, SWAP_FAILURE_TIMEOUT); |
ba035df2 | 1016 | } |
e04aad61 LP |
1017 | break; |
1018 | ||
1019 | case SWAP_ACTIVATING_SIGKILL: | |
1020 | case SWAP_DEACTIVATING_SIGKILL: | |
66870f90 | 1021 | log_warning_unit(u->id, "%s swap process still around after SIGKILL. Ignoring.", u->id); |
e1770af8 | 1022 | swap_enter_dead(s, SWAP_FAILURE_TIMEOUT); |
e04aad61 LP |
1023 | break; |
1024 | ||
1025 | default: | |
1026 | assert_not_reached("Timeout at wrong time."); | |
1027 | } | |
1028 | } | |
1029 | ||
1030 | static int swap_load_proc_swaps(Manager *m, bool set_flags) { | |
1031 | unsigned i; | |
1032 | int r = 0; | |
1033 | ||
1034 | assert(m); | |
1035 | ||
07b0b134 | 1036 | rewind(m->proc_swaps); |
bab45044 | 1037 | |
4e85aff4 | 1038 | (void) fscanf(m->proc_swaps, "%*s %*s %*s %*s %*s\n"); |
07b0b134 | 1039 | |
e04aad61 | 1040 | for (i = 1;; i++) { |
9fb3675e | 1041 | _cleanup_free_ char *dev = NULL, *d = NULL; |
07b0b134 ML |
1042 | int prio = 0, k; |
1043 | ||
646134dc ZJS |
1044 | k = fscanf(m->proc_swaps, |
1045 | "%ms " /* device/file */ | |
1046 | "%*s " /* type of swap */ | |
1047 | "%*s " /* swap size */ | |
1048 | "%*s " /* used */ | |
1049 | "%i\n", /* priority */ | |
1050 | &dev, &prio); | |
1051 | if (k != 2) { | |
07b0b134 | 1052 | if (k == EOF) |
4e85aff4 | 1053 | break; |
07b0b134 | 1054 | |
646134dc | 1055 | log_warning("Failed to parse /proc/swaps:%u", i); |
e04aad61 | 1056 | continue; |
07b0b134 | 1057 | } |
07b0b134 | 1058 | |
4e85aff4 | 1059 | d = cunescape(dev); |
4e85aff4 LP |
1060 | if (!d) |
1061 | return -ENOMEM; | |
1062 | ||
e04aad61 | 1063 | k = swap_process_new_swap(m, d, prio, set_flags); |
07b0b134 | 1064 | if (k < 0) |
e04aad61 | 1065 | r = k; |
07b0b134 ML |
1066 | } |
1067 | ||
e04aad61 LP |
1068 | return r; |
1069 | } | |
1070 | ||
1071 | int swap_dispatch_reload(Manager *m) { | |
4e434314 | 1072 | /* This function should go as soon as the kernel properly notifies us */ |
e04aad61 LP |
1073 | |
1074 | if (_likely_(!m->request_reload)) | |
1075 | return 0; | |
1076 | ||
1077 | m->request_reload = false; | |
1078 | ||
4e434314 LP |
1079 | return swap_fd_event(m, EPOLLPRI); |
1080 | } | |
1081 | ||
1082 | int swap_fd_event(Manager *m, int events) { | |
595ed347 | 1083 | Unit *u; |
4e434314 LP |
1084 | int r; |
1085 | ||
1086 | assert(m); | |
1087 | assert(events & EPOLLPRI); | |
1088 | ||
646134dc ZJS |
1089 | r = swap_load_proc_swaps(m, true); |
1090 | if (r < 0) { | |
e04aad61 LP |
1091 | log_error("Failed to reread /proc/swaps: %s", strerror(-r)); |
1092 | ||
1093 | /* Reset flags, just in case, for late calls */ | |
595ed347 MS |
1094 | LIST_FOREACH(units_by_type, u, m->units_by_type[UNIT_SWAP]) { |
1095 | Swap *swap = SWAP(u); | |
e04aad61 LP |
1096 | |
1097 | swap->is_active = swap->just_activated = false; | |
1098 | } | |
1099 | ||
1100 | return 0; | |
1101 | } | |
1102 | ||
1103 | manager_dispatch_load_queue(m); | |
1104 | ||
595ed347 MS |
1105 | LIST_FOREACH(units_by_type, u, m->units_by_type[UNIT_SWAP]) { |
1106 | Swap *swap = SWAP(u); | |
e04aad61 LP |
1107 | |
1108 | if (!swap->is_active) { | |
1109 | /* This has just been deactivated */ | |
1110 | ||
1111 | swap->from_proc_swaps = false; | |
1112 | swap_unset_proc_swaps(swap); | |
1113 | ||
1114 | switch (swap->state) { | |
1115 | ||
1116 | case SWAP_ACTIVE: | |
e1770af8 | 1117 | swap_enter_dead(swap, SWAP_SUCCESS); |
e04aad61 LP |
1118 | break; |
1119 | ||
1120 | default: | |
1121 | swap_set_state(swap, swap->state); | |
1122 | break; | |
1123 | } | |
1124 | ||
1125 | } else if (swap->just_activated) { | |
1126 | ||
1127 | /* New swap entry */ | |
1128 | ||
1129 | switch (swap->state) { | |
1130 | ||
1131 | case SWAP_DEAD: | |
1132 | case SWAP_FAILED: | |
e1770af8 | 1133 | swap_enter_active(swap, SWAP_SUCCESS); |
e04aad61 LP |
1134 | break; |
1135 | ||
1136 | default: | |
1137 | /* Nothing really changed, but let's | |
1138 | * issue an notification call | |
1139 | * nonetheless, in case somebody is | |
1140 | * waiting for this. */ | |
1141 | swap_set_state(swap, swap->state); | |
1142 | break; | |
1143 | } | |
1144 | } | |
1145 | ||
1146 | /* Reset the flags for later calls */ | |
1147 | swap->is_active = swap->just_activated = false; | |
1148 | } | |
1149 | ||
1150 | return 1; | |
1151 | } | |
1152 | ||
1153 | static Unit *swap_following(Unit *u) { | |
1154 | Swap *s = SWAP(u); | |
1155 | Swap *other, *first = NULL; | |
1156 | ||
1157 | assert(s); | |
1158 | ||
1159 | if (streq_ptr(s->what, s->parameters_proc_swaps.what)) | |
1160 | return NULL; | |
1161 | ||
1162 | /* Make everybody follow the unit that's named after the swap | |
1163 | * device in the kernel */ | |
1164 | ||
1165 | LIST_FOREACH_AFTER(same_proc_swaps, other, s) | |
1166 | if (streq_ptr(other->what, other->parameters_proc_swaps.what)) | |
1167 | return UNIT(other); | |
1168 | ||
1169 | LIST_FOREACH_BEFORE(same_proc_swaps, other, s) { | |
1170 | if (streq_ptr(other->what, other->parameters_proc_swaps.what)) | |
1171 | return UNIT(other); | |
1172 | ||
1173 | first = other; | |
1174 | } | |
1175 | ||
1176 | return UNIT(first); | |
07b0b134 ML |
1177 | } |
1178 | ||
6210e7fc LP |
1179 | static int swap_following_set(Unit *u, Set **_set) { |
1180 | Swap *s = SWAP(u); | |
1181 | Swap *other; | |
1182 | Set *set; | |
1183 | int r; | |
1184 | ||
1185 | assert(s); | |
1186 | assert(_set); | |
1187 | ||
1188 | if (LIST_JUST_US(same_proc_swaps, s)) { | |
1189 | *_set = NULL; | |
1190 | return 0; | |
1191 | } | |
1192 | ||
1193 | if (!(set = set_new(NULL, NULL))) | |
1194 | return -ENOMEM; | |
1195 | ||
1196 | LIST_FOREACH_AFTER(same_proc_swaps, other, s) | |
1197 | if ((r = set_put(set, other)) < 0) | |
1198 | goto fail; | |
1199 | ||
1200 | LIST_FOREACH_BEFORE(same_proc_swaps, other, s) | |
1201 | if ((r = set_put(set, other)) < 0) | |
1202 | goto fail; | |
1203 | ||
1204 | *_set = set; | |
1205 | return 1; | |
1206 | ||
1207 | fail: | |
1208 | set_free(set); | |
1209 | return r; | |
1210 | } | |
1211 | ||
07b0b134 ML |
1212 | static void swap_shutdown(Manager *m) { |
1213 | assert(m); | |
1214 | ||
1215 | if (m->proc_swaps) { | |
1216 | fclose(m->proc_swaps); | |
1217 | m->proc_swaps = NULL; | |
1218 | } | |
e04aad61 LP |
1219 | |
1220 | hashmap_free(m->swaps_by_proc_swaps); | |
1221 | m->swaps_by_proc_swaps = NULL; | |
07b0b134 ML |
1222 | } |
1223 | ||
07b0b134 ML |
1224 | static int swap_enumerate(Manager *m) { |
1225 | int r; | |
1226 | assert(m); | |
1227 | ||
4e434314 | 1228 | if (!m->proc_swaps) { |
b92bea5d ZJS |
1229 | struct epoll_event ev = { |
1230 | .events = EPOLLPRI, | |
1231 | .data.ptr = &m->swap_watch, | |
1232 | }; | |
1233 | ||
646134dc ZJS |
1234 | m->proc_swaps = fopen("/proc/swaps", "re"); |
1235 | if (!m->proc_swaps) | |
3f858732 | 1236 | return (errno == ENOENT) ? 0 : -errno; |
07b0b134 | 1237 | |
4e434314 LP |
1238 | m->swap_watch.type = WATCH_SWAP; |
1239 | m->swap_watch.fd = fileno(m->proc_swaps); | |
1240 | ||
4e434314 LP |
1241 | if (epoll_ctl(m->epoll_fd, EPOLL_CTL_ADD, m->swap_watch.fd, &ev) < 0) |
1242 | return -errno; | |
1243 | } | |
1244 | ||
646134dc ZJS |
1245 | r = swap_load_proc_swaps(m, false); |
1246 | if (r < 0) | |
07b0b134 ML |
1247 | swap_shutdown(m); |
1248 | ||
1249 | return r; | |
1250 | } | |
1251 | ||
fdf20a31 | 1252 | static void swap_reset_failed(Unit *u) { |
5632e374 LP |
1253 | Swap *s = SWAP(u); |
1254 | ||
1255 | assert(s); | |
1256 | ||
fdf20a31 | 1257 | if (s->state == SWAP_FAILED) |
5632e374 | 1258 | swap_set_state(s, SWAP_DEAD); |
e04aad61 | 1259 | |
e1770af8 | 1260 | s->result = SWAP_SUCCESS; |
5632e374 LP |
1261 | } |
1262 | ||
c74f17d9 | 1263 | static int swap_kill(Unit *u, KillWho who, int signo, DBusError *error) { |
814cc562 | 1264 | return unit_kill_common(u, who, signo, -1, SWAP(u)->control_pid, error); |
8a0867d6 LP |
1265 | } |
1266 | ||
5632e374 LP |
1267 | static const char* const swap_state_table[_SWAP_STATE_MAX] = { |
1268 | [SWAP_DEAD] = "dead", | |
e04aad61 | 1269 | [SWAP_ACTIVATING] = "activating", |
5632e374 | 1270 | [SWAP_ACTIVE] = "active", |
e04aad61 LP |
1271 | [SWAP_DEACTIVATING] = "deactivating", |
1272 | [SWAP_ACTIVATING_SIGTERM] = "activating-sigterm", | |
1273 | [SWAP_ACTIVATING_SIGKILL] = "activating-sigkill", | |
1274 | [SWAP_DEACTIVATING_SIGTERM] = "deactivating-sigterm", | |
1275 | [SWAP_DEACTIVATING_SIGKILL] = "deactivating-sigkill", | |
fdf20a31 | 1276 | [SWAP_FAILED] = "failed" |
5632e374 LP |
1277 | }; |
1278 | ||
1279 | DEFINE_STRING_TABLE_LOOKUP(swap_state, SwapState); | |
1280 | ||
e04aad61 LP |
1281 | static const char* const swap_exec_command_table[_SWAP_EXEC_COMMAND_MAX] = { |
1282 | [SWAP_EXEC_ACTIVATE] = "ExecActivate", | |
1283 | [SWAP_EXEC_DEACTIVATE] = "ExecDeactivate", | |
1284 | }; | |
1285 | ||
1286 | DEFINE_STRING_TABLE_LOOKUP(swap_exec_command, SwapExecCommand); | |
1287 | ||
e1770af8 LP |
1288 | static const char* const swap_result_table[_SWAP_RESULT_MAX] = { |
1289 | [SWAP_SUCCESS] = "success", | |
1290 | [SWAP_FAILURE_RESOURCES] = "resources", | |
1291 | [SWAP_FAILURE_TIMEOUT] = "timeout", | |
1292 | [SWAP_FAILURE_EXIT_CODE] = "exit-code", | |
1293 | [SWAP_FAILURE_SIGNAL] = "signal", | |
1294 | [SWAP_FAILURE_CORE_DUMP] = "core-dump" | |
1295 | }; | |
1296 | ||
1297 | DEFINE_STRING_TABLE_LOOKUP(swap_result, SwapResult); | |
1298 | ||
07b0b134 | 1299 | const UnitVTable swap_vtable = { |
7d17cfbc | 1300 | .object_size = sizeof(Swap), |
3ef63c31 | 1301 | |
f975e971 LP |
1302 | .sections = |
1303 | "Unit\0" | |
1304 | "Swap\0" | |
1305 | "Install\0", | |
07b0b134 | 1306 | |
4ad49000 | 1307 | .private_section = "Swap", |
71645aca | 1308 | .exec_context_offset = offsetof(Swap, exec_context), |
4ad49000 | 1309 | .cgroup_context_offset = offsetof(Swap, cgroup_context), |
71645aca | 1310 | |
e04aad61 | 1311 | .no_alias = true, |
07b0b134 ML |
1312 | .no_instances = true, |
1313 | ||
4e85aff4 | 1314 | .init = swap_init, |
07b0b134 | 1315 | .load = swap_load, |
6e620bec | 1316 | .done = swap_done, |
07b0b134 ML |
1317 | |
1318 | .coldplug = swap_coldplug, | |
1319 | ||
1320 | .dump = swap_dump, | |
1321 | ||
1322 | .start = swap_start, | |
1323 | .stop = swap_stop, | |
1324 | ||
8a0867d6 LP |
1325 | .kill = swap_kill, |
1326 | ||
07b0b134 ML |
1327 | .serialize = swap_serialize, |
1328 | .deserialize_item = swap_deserialize_item, | |
1329 | ||
1330 | .active_state = swap_active_state, | |
1331 | .sub_state_to_string = swap_sub_state_to_string, | |
1332 | ||
1333 | .check_gc = swap_check_gc, | |
1334 | ||
e04aad61 LP |
1335 | .sigchld_event = swap_sigchld_event, |
1336 | .timer_event = swap_timer_event, | |
1337 | ||
1338 | .reset_failed = swap_reset_failed, | |
1339 | ||
c4e2ceae | 1340 | .bus_interface = "org.freedesktop.systemd1.Swap", |
07b0b134 | 1341 | .bus_message_handler = bus_swap_message_handler, |
c4e2ceae | 1342 | .bus_invalidating_properties = bus_swap_invalidating_properties, |
74c964d3 LP |
1343 | .bus_set_property = bus_swap_set_property, |
1344 | .bus_commit_properties = bus_swap_commit_properties, | |
07b0b134 | 1345 | |
e04aad61 | 1346 | .following = swap_following, |
6210e7fc | 1347 | .following_set = swap_following_set, |
5632e374 | 1348 | |
6e620bec | 1349 | .enumerate = swap_enumerate, |
c6918296 MS |
1350 | .shutdown = swap_shutdown, |
1351 | ||
1352 | .status_message_formats = { | |
1353 | .starting_stopping = { | |
1354 | [0] = "Activating swap %s...", | |
1355 | [1] = "Deactivating swap %s...", | |
1356 | }, | |
1357 | .finished_start_job = { | |
1358 | [JOB_DONE] = "Activated swap %s.", | |
1359 | [JOB_FAILED] = "Failed to activate swap %s.", | |
1360 | [JOB_DEPENDENCY] = "Dependency failed for %s.", | |
1361 | [JOB_TIMEOUT] = "Timed out activating swap %s.", | |
1362 | }, | |
1363 | .finished_stop_job = { | |
1364 | [JOB_DONE] = "Deactivated swap %s.", | |
1365 | [JOB_FAILED] = "Failed deactivating swap %s.", | |
1366 | [JOB_TIMEOUT] = "Timed out deactivating swap %s.", | |
1367 | }, | |
1368 | }, | |
07b0b134 | 1369 | }; |