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53e1b683 | 1 | /* SPDX-License-Identifier: LGPL-2.1+ */ |
7c0436b9 LP |
2 | /*** |
3 | This file is part of systemd. | |
4 | ||
5 | Copyright 2010 Lennart Poettering | |
6 | ||
7 | systemd is free software; you can redistribute it and/or modify it | |
8 | under the terms of the GNU Lesser General Public License as published by | |
9 | the Free Software Foundation; either version 2.1 of the License, or | |
10 | (at your option) any later version. | |
11 | ||
12 | systemd is distributed in the hope that it will be useful, but | |
13 | WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
15 | Lesser General Public License for more details. | |
16 | ||
17 | You should have received a copy of the GNU Lesser General Public License | |
18 | along with systemd; If not, see <http://www.gnu.org/licenses/>. | |
19 | ***/ | |
20 | ||
f2b68789 | 21 | #include <fcntl.h> |
cf0fbc49 | 22 | #include <unistd.h> |
f2b68789 | 23 | |
b5efdb8a | 24 | #include "alloc-util.h" |
96aad8d1 | 25 | #include "bus-common-errors.h" |
718db961 | 26 | #include "bus-error.h" |
288a74cc | 27 | #include "terminal-util.h" |
b5efdb8a | 28 | #include "transaction.h" |
ee87525c | 29 | #include "dbus-unit.h" |
75778e21 MS |
30 | |
31 | static void transaction_unlink_job(Transaction *tr, Job *j, bool delete_dependencies); | |
32 | ||
33 | static void transaction_delete_job(Transaction *tr, Job *j, bool delete_dependencies) { | |
34 | assert(tr); | |
35 | assert(j); | |
36 | ||
37 | /* Deletes one job from the transaction */ | |
38 | ||
39 | transaction_unlink_job(tr, j, delete_dependencies); | |
40 | ||
d6a093d0 | 41 | job_free(j); |
75778e21 MS |
42 | } |
43 | ||
44 | static void transaction_delete_unit(Transaction *tr, Unit *u) { | |
45 | Job *j; | |
46 | ||
47 | /* Deletes all jobs associated with a certain unit from the | |
48 | * transaction */ | |
49 | ||
50 | while ((j = hashmap_get(tr->jobs, u))) | |
51 | transaction_delete_job(tr, j, true); | |
52 | } | |
53 | ||
54 | void transaction_abort(Transaction *tr) { | |
55 | Job *j; | |
56 | ||
57 | assert(tr); | |
58 | ||
59 | while ((j = hashmap_first(tr->jobs))) | |
1b9cea0c | 60 | transaction_delete_job(tr, j, false); |
75778e21 MS |
61 | |
62 | assert(hashmap_isempty(tr->jobs)); | |
75778e21 MS |
63 | } |
64 | ||
0d9989aa | 65 | static void transaction_find_jobs_that_matter_to_anchor(Job *j, unsigned generation) { |
75778e21 MS |
66 | JobDependency *l; |
67 | ||
75778e21 MS |
68 | /* A recursive sweep through the graph that marks all units |
69 | * that matter to the anchor job, i.e. are directly or | |
70 | * indirectly a dependency of the anchor job via paths that | |
71 | * are fully marked as mattering. */ | |
72 | ||
0d9989aa MS |
73 | j->matters_to_anchor = true; |
74 | j->generation = generation; | |
75778e21 | 75 | |
0d9989aa | 76 | LIST_FOREACH(subject, l, j->subject_list) { |
75778e21 MS |
77 | |
78 | /* This link does not matter */ | |
79 | if (!l->matters) | |
80 | continue; | |
81 | ||
82 | /* This unit has already been marked */ | |
83 | if (l->object->generation == generation) | |
84 | continue; | |
85 | ||
0d9989aa | 86 | transaction_find_jobs_that_matter_to_anchor(l->object, generation); |
75778e21 MS |
87 | } |
88 | } | |
89 | ||
90 | static void transaction_merge_and_delete_job(Transaction *tr, Job *j, Job *other, JobType t) { | |
91 | JobDependency *l, *last; | |
92 | ||
93 | assert(j); | |
94 | assert(other); | |
95 | assert(j->unit == other->unit); | |
96 | assert(!j->installed); | |
97 | ||
98 | /* Merges 'other' into 'j' and then deletes 'other'. */ | |
99 | ||
100 | j->type = t; | |
101 | j->state = JOB_WAITING; | |
23ade460 | 102 | j->irreversible = j->irreversible || other->irreversible; |
75778e21 MS |
103 | j->matters_to_anchor = j->matters_to_anchor || other->matters_to_anchor; |
104 | ||
105 | /* Patch us in as new owner of the JobDependency objects */ | |
106 | last = NULL; | |
107 | LIST_FOREACH(subject, l, other->subject_list) { | |
108 | assert(l->subject == other); | |
109 | l->subject = j; | |
110 | last = l; | |
111 | } | |
112 | ||
113 | /* Merge both lists */ | |
114 | if (last) { | |
115 | last->subject_next = j->subject_list; | |
116 | if (j->subject_list) | |
117 | j->subject_list->subject_prev = last; | |
118 | j->subject_list = other->subject_list; | |
119 | } | |
120 | ||
121 | /* Patch us in as new owner of the JobDependency objects */ | |
122 | last = NULL; | |
123 | LIST_FOREACH(object, l, other->object_list) { | |
124 | assert(l->object == other); | |
125 | l->object = j; | |
126 | last = l; | |
127 | } | |
128 | ||
129 | /* Merge both lists */ | |
130 | if (last) { | |
131 | last->object_next = j->object_list; | |
132 | if (j->object_list) | |
133 | j->object_list->object_prev = last; | |
134 | j->object_list = other->object_list; | |
135 | } | |
136 | ||
137 | /* Kill the other job */ | |
138 | other->subject_list = NULL; | |
139 | other->object_list = NULL; | |
140 | transaction_delete_job(tr, other, true); | |
141 | } | |
142 | ||
44a6b1b6 | 143 | _pure_ static bool job_is_conflicted_by(Job *j) { |
75778e21 MS |
144 | JobDependency *l; |
145 | ||
146 | assert(j); | |
147 | ||
148 | /* Returns true if this job is pulled in by a least one | |
149 | * ConflictedBy dependency. */ | |
150 | ||
151 | LIST_FOREACH(object, l, j->object_list) | |
152 | if (l->conflicts) | |
153 | return true; | |
154 | ||
155 | return false; | |
156 | } | |
157 | ||
158 | static int delete_one_unmergeable_job(Transaction *tr, Job *j) { | |
159 | Job *k; | |
160 | ||
161 | assert(j); | |
162 | ||
163 | /* Tries to delete one item in the linked list | |
164 | * j->transaction_next->transaction_next->... that conflicts | |
165 | * with another one, in an attempt to make an inconsistent | |
166 | * transaction work. */ | |
167 | ||
168 | /* We rely here on the fact that if a merged with b does not | |
169 | * merge with c, either a or b merge with c neither */ | |
170 | LIST_FOREACH(transaction, j, j) | |
171 | LIST_FOREACH(transaction, k, j->transaction_next) { | |
172 | Job *d; | |
173 | ||
174 | /* Is this one mergeable? Then skip it */ | |
175 | if (job_type_is_mergeable(j->type, k->type)) | |
176 | continue; | |
177 | ||
178 | /* Ok, we found two that conflict, let's see if we can | |
179 | * drop one of them */ | |
180 | if (!j->matters_to_anchor && !k->matters_to_anchor) { | |
181 | ||
182 | /* Both jobs don't matter, so let's | |
183 | * find the one that is smarter to | |
184 | * remove. Let's think positive and | |
185 | * rather remove stops then starts -- | |
186 | * except if something is being | |
187 | * stopped because it is conflicted by | |
188 | * another unit in which case we | |
189 | * rather remove the start. */ | |
190 | ||
f2341e0a | 191 | log_unit_debug(j->unit, |
66870f90 ZJS |
192 | "Looking at job %s/%s conflicted_by=%s", |
193 | j->unit->id, job_type_to_string(j->type), | |
194 | yes_no(j->type == JOB_STOP && job_is_conflicted_by(j))); | |
f2341e0a | 195 | log_unit_debug(k->unit, |
66870f90 ZJS |
196 | "Looking at job %s/%s conflicted_by=%s", |
197 | k->unit->id, job_type_to_string(k->type), | |
198 | yes_no(k->type == JOB_STOP && job_is_conflicted_by(k))); | |
75778e21 MS |
199 | |
200 | if (j->type == JOB_STOP) { | |
201 | ||
202 | if (job_is_conflicted_by(j)) | |
203 | d = k; | |
204 | else | |
205 | d = j; | |
206 | ||
207 | } else if (k->type == JOB_STOP) { | |
208 | ||
209 | if (job_is_conflicted_by(k)) | |
210 | d = j; | |
211 | else | |
212 | d = k; | |
213 | } else | |
214 | d = j; | |
215 | ||
216 | } else if (!j->matters_to_anchor) | |
217 | d = j; | |
218 | else if (!k->matters_to_anchor) | |
219 | d = k; | |
220 | else | |
221 | return -ENOEXEC; | |
222 | ||
223 | /* Ok, we can drop one, so let's do so. */ | |
f2341e0a | 224 | log_unit_debug(d->unit, |
75cb8502 ZJS |
225 | "Fixing conflicting jobs %s/%s,%s/%s by deleting job %s/%s", |
226 | j->unit->id, job_type_to_string(j->type), | |
227 | k->unit->id, job_type_to_string(k->type), | |
66870f90 | 228 | d->unit->id, job_type_to_string(d->type)); |
75778e21 MS |
229 | transaction_delete_job(tr, d, true); |
230 | return 0; | |
231 | } | |
232 | ||
233 | return -EINVAL; | |
234 | } | |
235 | ||
718db961 | 236 | static int transaction_merge_jobs(Transaction *tr, sd_bus_error *e) { |
75778e21 MS |
237 | Job *j; |
238 | Iterator i; | |
239 | int r; | |
240 | ||
241 | assert(tr); | |
242 | ||
243 | /* First step, check whether any of the jobs for one specific | |
244 | * task conflict. If so, try to drop one of them. */ | |
245 | HASHMAP_FOREACH(j, tr->jobs, i) { | |
246 | JobType t; | |
247 | Job *k; | |
248 | ||
249 | t = j->type; | |
250 | LIST_FOREACH(transaction, k, j->transaction_next) { | |
e0209d83 | 251 | if (job_type_merge_and_collapse(&t, k->type, j->unit) >= 0) |
75778e21 MS |
252 | continue; |
253 | ||
254 | /* OK, we could not merge all jobs for this | |
255 | * action. Let's see if we can get rid of one | |
256 | * of them */ | |
257 | ||
258 | r = delete_one_unmergeable_job(tr, j); | |
259 | if (r >= 0) | |
260 | /* Ok, we managed to drop one, now | |
261 | * let's ask our callers to call us | |
262 | * again after garbage collecting */ | |
263 | return -EAGAIN; | |
264 | ||
265 | /* We couldn't merge anything. Failure */ | |
7358dc02 ZJS |
266 | return sd_bus_error_setf(e, BUS_ERROR_TRANSACTION_JOBS_CONFLICTING, |
267 | "Transaction contains conflicting jobs '%s' and '%s' for %s. " | |
268 | "Probably contradicting requirement dependencies configured.", | |
269 | job_type_to_string(t), | |
270 | job_type_to_string(k->type), | |
271 | k->unit->id); | |
75778e21 MS |
272 | } |
273 | } | |
274 | ||
275 | /* Second step, merge the jobs. */ | |
276 | HASHMAP_FOREACH(j, tr->jobs, i) { | |
277 | JobType t = j->type; | |
278 | Job *k; | |
279 | ||
e0209d83 | 280 | /* Merge all transaction jobs for j->unit */ |
75778e21 | 281 | LIST_FOREACH(transaction, k, j->transaction_next) |
e0209d83 | 282 | assert_se(job_type_merge_and_collapse(&t, k->type, j->unit) == 0); |
75778e21 | 283 | |
75778e21 | 284 | while ((k = j->transaction_next)) { |
656bbffc | 285 | if (tr->anchor_job == k) { |
75778e21 MS |
286 | transaction_merge_and_delete_job(tr, k, j, t); |
287 | j = k; | |
288 | } else | |
289 | transaction_merge_and_delete_job(tr, j, k, t); | |
290 | } | |
291 | ||
75778e21 MS |
292 | assert(!j->transaction_next); |
293 | assert(!j->transaction_prev); | |
294 | } | |
295 | ||
296 | return 0; | |
297 | } | |
298 | ||
299 | static void transaction_drop_redundant(Transaction *tr) { | |
055163ad MS |
300 | Job *j; |
301 | Iterator i; | |
75778e21 | 302 | |
055163ad MS |
303 | /* Goes through the transaction and removes all jobs of the units |
304 | * whose jobs are all noops. If not all of a unit's jobs are | |
305 | * redundant, they are kept. */ | |
75778e21 | 306 | |
055163ad | 307 | assert(tr); |
75778e21 | 308 | |
055163ad MS |
309 | rescan: |
310 | HASHMAP_FOREACH(j, tr->jobs, i) { | |
311 | Job *k; | |
75778e21 | 312 | |
055163ad | 313 | LIST_FOREACH(transaction, k, j) { |
75778e21 | 314 | |
055163ad MS |
315 | if (tr->anchor_job == k || |
316 | !job_type_is_redundant(k->type, unit_active_state(k->unit)) || | |
317 | (k->unit->job && job_type_is_conflicting(k->type, k->unit->job->type))) | |
318 | goto next_unit; | |
75778e21 MS |
319 | } |
320 | ||
055163ad MS |
321 | /* log_debug("Found redundant job %s/%s, dropping.", j->unit->id, job_type_to_string(j->type)); */ |
322 | transaction_delete_job(tr, j, false); | |
323 | goto rescan; | |
324 | next_unit:; | |
325 | } | |
75778e21 MS |
326 | } |
327 | ||
44a6b1b6 | 328 | _pure_ static bool unit_matters_to_anchor(Unit *u, Job *j) { |
75778e21 MS |
329 | assert(u); |
330 | assert(!j->transaction_prev); | |
331 | ||
332 | /* Checks whether at least one of the jobs for this unit | |
333 | * matters to the anchor. */ | |
334 | ||
335 | LIST_FOREACH(transaction, j, j) | |
336 | if (j->matters_to_anchor) | |
337 | return true; | |
338 | ||
339 | return false; | |
340 | } | |
341 | ||
924775e8 ZJS |
342 | static char* merge_unit_ids(const char* unit_log_field, char **pairs) { |
343 | char **unit_id, **job_type, *ans = NULL; | |
344 | size_t alloc = 0, size = 0, next; | |
345 | ||
346 | STRV_FOREACH_PAIR(unit_id, job_type, pairs) { | |
347 | next = strlen(unit_log_field) + strlen(*unit_id); | |
348 | if (!GREEDY_REALLOC(ans, alloc, size + next + 1)) { | |
5fecf46d | 349 | return mfree(ans); |
924775e8 ZJS |
350 | } |
351 | ||
352 | sprintf(ans + size, "%s%s", unit_log_field, *unit_id); | |
353 | if (*(unit_id+1)) | |
354 | ans[size + next] = '\n'; | |
355 | size += next + 1; | |
356 | } | |
357 | ||
358 | return ans; | |
359 | } | |
360 | ||
718db961 | 361 | static int transaction_verify_order_one(Transaction *tr, Job *j, Job *from, unsigned generation, sd_bus_error *e) { |
75778e21 MS |
362 | Iterator i; |
363 | Unit *u; | |
eef85c4a | 364 | void *v; |
75778e21 MS |
365 | int r; |
366 | ||
367 | assert(tr); | |
368 | assert(j); | |
369 | assert(!j->transaction_prev); | |
370 | ||
371 | /* Does a recursive sweep through the ordering graph, looking | |
1244d8d6 | 372 | * for a cycle. If we find a cycle we try to break it. */ |
75778e21 MS |
373 | |
374 | /* Have we seen this before? */ | |
375 | if (j->generation == generation) { | |
924775e8 ZJS |
376 | Job *k, *delete = NULL; |
377 | _cleanup_free_ char **array = NULL, *unit_ids = NULL; | |
378 | char **unit_id, **job_type; | |
75778e21 MS |
379 | |
380 | /* If the marker is NULL we have been here already and | |
381 | * decided the job was loop-free from here. Hence | |
382 | * shortcut things and return right-away. */ | |
383 | if (!j->marker) | |
384 | return 0; | |
385 | ||
924775e8 ZJS |
386 | /* So, the marker is not NULL and we already have been here. We have |
387 | * a cycle. Let's try to break it. We go backwards in our path and | |
388 | * try to find a suitable job to remove. We use the marker to find | |
389 | * our way back, since smart how we are we stored our way back in | |
390 | * there. */ | |
391 | ||
75778e21 MS |
392 | for (k = from; k; k = ((k->generation == generation && k->marker != k) ? k->marker : NULL)) { |
393 | ||
924775e8 ZJS |
394 | /* For logging below */ |
395 | if (strv_push_pair(&array, k->unit->id, (char*) job_type_to_string(k->type)) < 0) | |
396 | log_oom(); | |
75778e21 | 397 | |
ece174c5 | 398 | if (!delete && hashmap_get(tr->jobs, k->unit) && !unit_matters_to_anchor(k->unit, k)) |
924775e8 | 399 | /* Ok, we can drop this one, so let's do so. */ |
75778e21 | 400 | delete = k; |
75778e21 | 401 | |
924775e8 | 402 | /* Check if this in fact was the beginning of the cycle */ |
75778e21 MS |
403 | if (k == j) |
404 | break; | |
405 | } | |
406 | ||
924775e8 ZJS |
407 | unit_ids = merge_unit_ids(j->manager->unit_log_field, array); /* ignore error */ |
408 | ||
409 | STRV_FOREACH_PAIR(unit_id, job_type, array) | |
410 | /* logging for j not k here to provide a consistent narrative */ | |
411 | log_struct(LOG_WARNING, | |
412 | "MESSAGE=%s: Found %s on %s/%s", | |
413 | j->unit->id, | |
414 | unit_id == array ? "ordering cycle" : "dependency", | |
415 | *unit_id, *job_type, | |
416 | unit_ids, NULL); | |
75778e21 MS |
417 | |
418 | if (delete) { | |
dc9b5816 | 419 | const char *status; |
924775e8 ZJS |
420 | /* logging for j not k here to provide a consistent narrative */ |
421 | log_struct(LOG_ERR, | |
422 | "MESSAGE=%s: Job %s/%s deleted to break ordering cycle starting with %s/%s", | |
423 | j->unit->id, delete->unit->id, job_type_to_string(delete->type), | |
424 | j->unit->id, job_type_to_string(j->type), | |
425 | unit_ids, NULL); | |
dc9b5816 ZJS |
426 | |
427 | if (log_get_show_color()) | |
428 | status = ANSI_HIGHLIGHT_RED " SKIP " ANSI_NORMAL; | |
429 | else | |
430 | status = " SKIP "; | |
431 | ||
432 | unit_status_printf(delete->unit, status, | |
297d0749 | 433 | "Ordering cycle found, skipping %s"); |
75778e21 MS |
434 | transaction_delete_unit(tr, delete->unit); |
435 | return -EAGAIN; | |
436 | } | |
437 | ||
924775e8 ZJS |
438 | log_struct(LOG_ERR, |
439 | "MESSAGE=%s: Unable to break cycle starting with %s/%s", | |
440 | j->unit->id, j->unit->id, job_type_to_string(j->type), | |
441 | unit_ids, NULL); | |
75778e21 | 442 | |
7358dc02 ZJS |
443 | return sd_bus_error_setf(e, BUS_ERROR_TRANSACTION_ORDER_IS_CYCLIC, |
444 | "Transaction order is cyclic. See system logs for details."); | |
75778e21 MS |
445 | } |
446 | ||
447 | /* Make the marker point to where we come from, so that we can | |
448 | * find our way backwards if we want to break a cycle. We use | |
449 | * a special marker for the beginning: we point to | |
450 | * ourselves. */ | |
451 | j->marker = from ? from : j; | |
452 | j->generation = generation; | |
453 | ||
c5315881 | 454 | /* We assume that the dependencies are bidirectional, and |
75778e21 | 455 | * hence can ignore UNIT_AFTER */ |
eef85c4a | 456 | HASHMAP_FOREACH_KEY(v, u, j->unit->dependencies[UNIT_BEFORE], i) { |
75778e21 MS |
457 | Job *o; |
458 | ||
459 | /* Is there a job for this unit? */ | |
460 | o = hashmap_get(tr->jobs, u); | |
461 | if (!o) { | |
462 | /* Ok, there is no job for this in the | |
463 | * transaction, but maybe there is already one | |
464 | * running? */ | |
465 | o = u->job; | |
466 | if (!o) | |
467 | continue; | |
468 | } | |
469 | ||
470 | r = transaction_verify_order_one(tr, o, j, generation, e); | |
471 | if (r < 0) | |
472 | return r; | |
473 | } | |
474 | ||
475 | /* Ok, let's backtrack, and remember that this entry is not on | |
476 | * our path anymore. */ | |
477 | j->marker = NULL; | |
478 | ||
479 | return 0; | |
480 | } | |
481 | ||
718db961 | 482 | static int transaction_verify_order(Transaction *tr, unsigned *generation, sd_bus_error *e) { |
75778e21 MS |
483 | Job *j; |
484 | int r; | |
485 | Iterator i; | |
486 | unsigned g; | |
487 | ||
488 | assert(tr); | |
489 | assert(generation); | |
490 | ||
491 | /* Check if the ordering graph is cyclic. If it is, try to fix | |
492 | * that up by dropping one of the jobs. */ | |
493 | ||
494 | g = (*generation)++; | |
495 | ||
3cc2aff1 LP |
496 | HASHMAP_FOREACH(j, tr->jobs, i) { |
497 | r = transaction_verify_order_one(tr, j, NULL, g, e); | |
498 | if (r < 0) | |
75778e21 | 499 | return r; |
3cc2aff1 | 500 | } |
75778e21 MS |
501 | |
502 | return 0; | |
503 | } | |
504 | ||
505 | static void transaction_collect_garbage(Transaction *tr) { | |
055163ad MS |
506 | Iterator i; |
507 | Job *j; | |
75778e21 MS |
508 | |
509 | assert(tr); | |
510 | ||
511 | /* Drop jobs that are not required by any other job */ | |
512 | ||
055163ad MS |
513 | rescan: |
514 | HASHMAP_FOREACH(j, tr->jobs, i) { | |
515 | if (tr->anchor_job == j || j->object_list) { | |
516 | /* log_debug("Keeping job %s/%s because of %s/%s", */ | |
517 | /* j->unit->id, job_type_to_string(j->type), */ | |
518 | /* j->object_list->subject ? j->object_list->subject->unit->id : "root", */ | |
519 | /* j->object_list->subject ? job_type_to_string(j->object_list->subject->type) : "root"); */ | |
520 | continue; | |
75778e21 MS |
521 | } |
522 | ||
055163ad MS |
523 | /* log_debug("Garbage collecting job %s/%s", j->unit->id, job_type_to_string(j->type)); */ |
524 | transaction_delete_job(tr, j, true); | |
525 | goto rescan; | |
526 | } | |
75778e21 MS |
527 | } |
528 | ||
718db961 | 529 | static int transaction_is_destructive(Transaction *tr, JobMode mode, sd_bus_error *e) { |
75778e21 MS |
530 | Iterator i; |
531 | Job *j; | |
532 | ||
533 | assert(tr); | |
534 | ||
535 | /* Checks whether applying this transaction means that | |
536 | * existing jobs would be replaced */ | |
537 | ||
538 | HASHMAP_FOREACH(j, tr->jobs, i) { | |
539 | ||
540 | /* Assume merged */ | |
541 | assert(!j->transaction_prev); | |
542 | assert(!j->transaction_next); | |
543 | ||
23ade460 | 544 | if (j->unit->job && (mode == JOB_FAIL || j->unit->job->irreversible) && |
c21b92ff | 545 | job_type_is_conflicting(j->unit->job->type, j->type)) |
7358dc02 ZJS |
546 | return sd_bus_error_setf(e, BUS_ERROR_TRANSACTION_IS_DESTRUCTIVE, |
547 | "Transaction is destructive."); | |
75778e21 MS |
548 | } |
549 | ||
550 | return 0; | |
551 | } | |
552 | ||
553 | static void transaction_minimize_impact(Transaction *tr) { | |
055163ad MS |
554 | Job *j; |
555 | Iterator i; | |
556 | ||
75778e21 MS |
557 | assert(tr); |
558 | ||
559 | /* Drops all unnecessary jobs that reverse already active jobs | |
560 | * or that stop a running service. */ | |
561 | ||
055163ad MS |
562 | rescan: |
563 | HASHMAP_FOREACH(j, tr->jobs, i) { | |
564 | LIST_FOREACH(transaction, j, j) { | |
565 | bool stops_running_service, changes_existing_job; | |
75778e21 | 566 | |
055163ad MS |
567 | /* If it matters, we shouldn't drop it */ |
568 | if (j->matters_to_anchor) | |
569 | continue; | |
75778e21 | 570 | |
055163ad MS |
571 | /* Would this stop a running service? |
572 | * Would this change an existing job? | |
573 | * If so, let's drop this entry */ | |
75778e21 | 574 | |
055163ad MS |
575 | stops_running_service = |
576 | j->type == JOB_STOP && UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(j->unit)); | |
75778e21 | 577 | |
055163ad MS |
578 | changes_existing_job = |
579 | j->unit->job && | |
580 | job_type_is_conflicting(j->type, j->unit->job->type); | |
75778e21 | 581 | |
055163ad MS |
582 | if (!stops_running_service && !changes_existing_job) |
583 | continue; | |
75778e21 | 584 | |
055163ad | 585 | if (stops_running_service) |
f2341e0a | 586 | log_unit_debug(j->unit, |
66870f90 ZJS |
587 | "%s/%s would stop a running service.", |
588 | j->unit->id, job_type_to_string(j->type)); | |
75778e21 | 589 | |
055163ad | 590 | if (changes_existing_job) |
f2341e0a | 591 | log_unit_debug(j->unit, |
66870f90 ZJS |
592 | "%s/%s would change existing job.", |
593 | j->unit->id, job_type_to_string(j->type)); | |
75778e21 | 594 | |
055163ad | 595 | /* Ok, let's get rid of this */ |
f2341e0a | 596 | log_unit_debug(j->unit, |
66870f90 ZJS |
597 | "Deleting %s/%s to minimize impact.", |
598 | j->unit->id, job_type_to_string(j->type)); | |
75778e21 | 599 | |
055163ad MS |
600 | transaction_delete_job(tr, j, true); |
601 | goto rescan; | |
75778e21 | 602 | } |
055163ad | 603 | } |
75778e21 MS |
604 | } |
605 | ||
606 | static int transaction_apply(Transaction *tr, Manager *m, JobMode mode) { | |
607 | Iterator i; | |
608 | Job *j; | |
609 | int r; | |
610 | ||
611 | /* Moves the transaction jobs to the set of active jobs */ | |
612 | ||
3742095b | 613 | if (IN_SET(mode, JOB_ISOLATE, JOB_FLUSH)) { |
75778e21 MS |
614 | |
615 | /* When isolating first kill all installed jobs which | |
616 | * aren't part of the new transaction */ | |
75778e21 MS |
617 | HASHMAP_FOREACH(j, m->jobs, i) { |
618 | assert(j->installed); | |
619 | ||
2de0b9e9 MO |
620 | if (j->unit->ignore_on_isolate) |
621 | continue; | |
622 | ||
75778e21 MS |
623 | if (hashmap_get(tr->jobs, j->unit)) |
624 | continue; | |
625 | ||
5273510e MS |
626 | /* Not invalidating recursively. Avoids triggering |
627 | * OnFailure= actions of dependent jobs. Also avoids | |
628 | * invalidating our iterator. */ | |
833f92ad | 629 | job_finish_and_invalidate(j, JOB_CANCELED, false, false); |
75778e21 MS |
630 | } |
631 | } | |
632 | ||
633 | HASHMAP_FOREACH(j, tr->jobs, i) { | |
634 | /* Assume merged */ | |
635 | assert(!j->transaction_prev); | |
636 | assert(!j->transaction_next); | |
637 | ||
75778e21 MS |
638 | r = hashmap_put(m->jobs, UINT32_TO_PTR(j->id), j); |
639 | if (r < 0) | |
640 | goto rollback; | |
641 | } | |
642 | ||
643 | while ((j = hashmap_steal_first(tr->jobs))) { | |
656bbffc MS |
644 | Job *installed_job; |
645 | ||
75778e21 MS |
646 | /* Clean the job dependencies */ |
647 | transaction_unlink_job(tr, j, false); | |
648 | ||
656bbffc MS |
649 | installed_job = job_install(j); |
650 | if (installed_job != j) { | |
651 | /* j has been merged into a previously installed job */ | |
652 | if (tr->anchor_job == j) | |
653 | tr->anchor_job = installed_job; | |
654 | hashmap_remove(m->jobs, UINT32_TO_PTR(j->id)); | |
655 | job_free(j); | |
656 | j = installed_job; | |
657 | } | |
05d576f1 | 658 | |
75778e21 MS |
659 | job_add_to_run_queue(j); |
660 | job_add_to_dbus_queue(j); | |
a2df3ea4 | 661 | job_start_timer(j, false); |
c65eb836 | 662 | job_shutdown_magic(j); |
75778e21 MS |
663 | } |
664 | ||
75778e21 MS |
665 | return 0; |
666 | ||
667 | rollback: | |
668 | ||
d6a093d0 | 669 | HASHMAP_FOREACH(j, tr->jobs, i) |
75778e21 | 670 | hashmap_remove(m->jobs, UINT32_TO_PTR(j->id)); |
75778e21 MS |
671 | |
672 | return r; | |
673 | } | |
674 | ||
718db961 | 675 | int transaction_activate(Transaction *tr, Manager *m, JobMode mode, sd_bus_error *e) { |
4e7bd268 MS |
676 | Iterator i; |
677 | Job *j; | |
75778e21 MS |
678 | int r; |
679 | unsigned generation = 1; | |
680 | ||
681 | assert(tr); | |
682 | ||
683 | /* This applies the changes recorded in tr->jobs to | |
684 | * the actual list of jobs, if possible. */ | |
685 | ||
4e7bd268 MS |
686 | /* Reset the generation counter of all installed jobs. The detection of cycles |
687 | * looks at installed jobs. If they had a non-zero generation from some previous | |
688 | * walk of the graph, the algorithm would break. */ | |
689 | HASHMAP_FOREACH(j, m->jobs, i) | |
690 | j->generation = 0; | |
691 | ||
75778e21 | 692 | /* First step: figure out which jobs matter */ |
0d9989aa | 693 | transaction_find_jobs_that_matter_to_anchor(tr->anchor_job, generation++); |
75778e21 MS |
694 | |
695 | /* Second step: Try not to stop any running services if | |
696 | * we don't have to. Don't try to reverse running | |
697 | * jobs if we don't have to. */ | |
698 | if (mode == JOB_FAIL) | |
699 | transaction_minimize_impact(tr); | |
700 | ||
701 | /* Third step: Drop redundant jobs */ | |
702 | transaction_drop_redundant(tr); | |
703 | ||
704 | for (;;) { | |
705 | /* Fourth step: Let's remove unneeded jobs that might | |
706 | * be lurking. */ | |
707 | if (mode != JOB_ISOLATE) | |
708 | transaction_collect_garbage(tr); | |
709 | ||
710 | /* Fifth step: verify order makes sense and correct | |
711 | * cycles if necessary and possible */ | |
712 | r = transaction_verify_order(tr, &generation, e); | |
713 | if (r >= 0) | |
714 | break; | |
715 | ||
716 | if (r != -EAGAIN) { | |
718db961 | 717 | log_warning("Requested transaction contains an unfixable cyclic ordering dependency: %s", bus_error_message(e, r)); |
75778e21 MS |
718 | return r; |
719 | } | |
720 | ||
721 | /* Let's see if the resulting transaction ordering | |
722 | * graph is still cyclic... */ | |
723 | } | |
724 | ||
725 | for (;;) { | |
726 | /* Sixth step: let's drop unmergeable entries if | |
727 | * necessary and possible, merge entries we can | |
728 | * merge */ | |
729 | r = transaction_merge_jobs(tr, e); | |
730 | if (r >= 0) | |
731 | break; | |
732 | ||
733 | if (r != -EAGAIN) { | |
718db961 | 734 | log_warning("Requested transaction contains unmergeable jobs: %s", bus_error_message(e, r)); |
75778e21 MS |
735 | return r; |
736 | } | |
737 | ||
738 | /* Seventh step: an entry got dropped, let's garbage | |
739 | * collect its dependencies. */ | |
740 | if (mode != JOB_ISOLATE) | |
741 | transaction_collect_garbage(tr); | |
742 | ||
743 | /* Let's see if the resulting transaction still has | |
744 | * unmergeable entries ... */ | |
745 | } | |
746 | ||
747 | /* Eights step: Drop redundant jobs again, if the merging now allows us to drop more. */ | |
748 | transaction_drop_redundant(tr); | |
749 | ||
750 | /* Ninth step: check whether we can actually apply this */ | |
23ade460 MS |
751 | r = transaction_is_destructive(tr, mode, e); |
752 | if (r < 0) { | |
718db961 | 753 | log_notice("Requested transaction contradicts existing jobs: %s", bus_error_message(e, r)); |
23ade460 | 754 | return r; |
75778e21 MS |
755 | } |
756 | ||
757 | /* Tenth step: apply changes */ | |
758 | r = transaction_apply(tr, m, mode); | |
23bbb0de MS |
759 | if (r < 0) |
760 | return log_warning_errno(r, "Failed to apply transaction: %m"); | |
75778e21 MS |
761 | |
762 | assert(hashmap_isempty(tr->jobs)); | |
75778e21 | 763 | |
f2b68789 LP |
764 | if (!hashmap_isempty(m->jobs)) { |
765 | /* Are there any jobs now? Then make sure we have the | |
766 | * idle pipe around. We don't really care too much | |
767 | * whether this works or not, as the idle pipe is a | |
768 | * feature for cosmetics, not actually useful for | |
769 | * anything beyond that. */ | |
770 | ||
31a7eb86 ZJS |
771 | if (m->idle_pipe[0] < 0 && m->idle_pipe[1] < 0 && |
772 | m->idle_pipe[2] < 0 && m->idle_pipe[3] < 0) { | |
1afaa7e8 LP |
773 | (void) pipe2(m->idle_pipe, O_NONBLOCK|O_CLOEXEC); |
774 | (void) pipe2(m->idle_pipe + 2, O_NONBLOCK|O_CLOEXEC); | |
31a7eb86 | 775 | } |
f2b68789 LP |
776 | } |
777 | ||
75778e21 MS |
778 | return 0; |
779 | } | |
780 | ||
4bd29fe5 | 781 | static Job* transaction_add_one_job(Transaction *tr, JobType type, Unit *unit, bool *is_new) { |
75778e21 MS |
782 | Job *j, *f; |
783 | ||
784 | assert(tr); | |
785 | assert(unit); | |
786 | ||
787 | /* Looks for an existing prospective job and returns that. If | |
788 | * it doesn't exist it is created and added to the prospective | |
789 | * jobs list. */ | |
790 | ||
791 | f = hashmap_get(tr->jobs, unit); | |
792 | ||
793 | LIST_FOREACH(transaction, j, f) { | |
794 | assert(j->unit == unit); | |
795 | ||
796 | if (j->type == type) { | |
797 | if (is_new) | |
798 | *is_new = false; | |
799 | return j; | |
800 | } | |
801 | } | |
802 | ||
3c956cfe MS |
803 | j = job_new(unit, type); |
804 | if (!j) | |
805 | return NULL; | |
75778e21 MS |
806 | |
807 | j->generation = 0; | |
808 | j->marker = NULL; | |
809 | j->matters_to_anchor = false; | |
23ade460 | 810 | j->irreversible = tr->irreversible; |
75778e21 | 811 | |
71fda00f | 812 | LIST_PREPEND(transaction, f, j); |
75778e21 MS |
813 | |
814 | if (hashmap_replace(tr->jobs, unit, f) < 0) { | |
71fda00f | 815 | LIST_REMOVE(transaction, f, j); |
75778e21 MS |
816 | job_free(j); |
817 | return NULL; | |
818 | } | |
819 | ||
820 | if (is_new) | |
821 | *is_new = true; | |
822 | ||
823 | /* log_debug("Added job %s/%s to transaction.", unit->id, job_type_to_string(type)); */ | |
824 | ||
825 | return j; | |
826 | } | |
827 | ||
828 | static void transaction_unlink_job(Transaction *tr, Job *j, bool delete_dependencies) { | |
829 | assert(tr); | |
830 | assert(j); | |
831 | ||
832 | if (j->transaction_prev) | |
833 | j->transaction_prev->transaction_next = j->transaction_next; | |
834 | else if (j->transaction_next) | |
835 | hashmap_replace(tr->jobs, j->unit, j->transaction_next); | |
836 | else | |
837 | hashmap_remove_value(tr->jobs, j->unit, j); | |
838 | ||
839 | if (j->transaction_next) | |
840 | j->transaction_next->transaction_prev = j->transaction_prev; | |
841 | ||
842 | j->transaction_prev = j->transaction_next = NULL; | |
843 | ||
844 | while (j->subject_list) | |
e6eda1f2 | 845 | job_dependency_free(j->subject_list); |
75778e21 MS |
846 | |
847 | while (j->object_list) { | |
848 | Job *other = j->object_list->matters ? j->object_list->subject : NULL; | |
849 | ||
e6eda1f2 | 850 | job_dependency_free(j->object_list); |
75778e21 MS |
851 | |
852 | if (other && delete_dependencies) { | |
f2341e0a | 853 | log_unit_debug(other->unit, |
66870f90 ZJS |
854 | "Deleting job %s/%s as dependency of job %s/%s", |
855 | other->unit->id, job_type_to_string(other->type), | |
856 | j->unit->id, job_type_to_string(j->type)); | |
75778e21 MS |
857 | transaction_delete_job(tr, other, delete_dependencies); |
858 | } | |
859 | } | |
860 | } | |
861 | ||
15d167f8 JW |
862 | void transaction_add_propagate_reload_jobs(Transaction *tr, Unit *unit, Job *by, bool ignore_order, sd_bus_error *e) { |
863 | Iterator i; | |
15d167f8 | 864 | JobType nt; |
eef85c4a LP |
865 | Unit *dep; |
866 | void *v; | |
15d167f8 JW |
867 | int r; |
868 | ||
869 | assert(tr); | |
870 | assert(unit); | |
871 | ||
eef85c4a | 872 | HASHMAP_FOREACH_KEY(v, dep, unit->dependencies[UNIT_PROPAGATES_RELOAD_TO], i) { |
15d167f8 JW |
873 | nt = job_type_collapse(JOB_TRY_RELOAD, dep); |
874 | if (nt == JOB_NOP) | |
875 | continue; | |
876 | ||
877 | r = transaction_add_job_and_dependencies(tr, nt, dep, by, false, false, false, ignore_order, e); | |
878 | if (r < 0) { | |
879 | log_unit_warning(dep, | |
880 | "Cannot add dependency reload job, ignoring: %s", | |
881 | bus_error_message(e, r)); | |
882 | sd_bus_error_free(e); | |
883 | } | |
884 | } | |
885 | } | |
886 | ||
75778e21 MS |
887 | int transaction_add_job_and_dependencies( |
888 | Transaction *tr, | |
889 | JobType type, | |
890 | Unit *unit, | |
891 | Job *by, | |
892 | bool matters, | |
75778e21 MS |
893 | bool conflicts, |
894 | bool ignore_requirements, | |
895 | bool ignore_order, | |
718db961 | 896 | sd_bus_error *e) { |
eef85c4a LP |
897 | |
898 | bool is_new; | |
75778e21 MS |
899 | Iterator i; |
900 | Unit *dep; | |
eef85c4a LP |
901 | Job *ret; |
902 | void *v; | |
75778e21 | 903 | int r; |
75778e21 MS |
904 | |
905 | assert(tr); | |
906 | assert(type < _JOB_TYPE_MAX); | |
e0209d83 | 907 | assert(type < _JOB_TYPE_MAX_IN_TRANSACTION); |
75778e21 MS |
908 | assert(unit); |
909 | ||
43706330 IS |
910 | /* Before adding jobs for this unit, let's ensure that its state has been loaded |
911 | * This matters when jobs are spawned as part of coldplugging itself (see e. g. path_coldplug()). | |
912 | * This way, we "recursively" coldplug units, ensuring that we do not look at state of | |
913 | * not-yet-coldplugged units. */ | |
2c289ea8 | 914 | if (MANAGER_IS_RELOADING(unit->manager)) |
43706330 IS |
915 | unit_coldplug(unit); |
916 | ||
75778e21 MS |
917 | /* log_debug("Pulling in %s/%s from %s/%s", */ |
918 | /* unit->id, job_type_to_string(type), */ | |
919 | /* by ? by->unit->id : "NA", */ | |
920 | /* by ? job_type_to_string(by->type) : "NA"); */ | |
921 | ||
7358dc02 | 922 | if (!IN_SET(unit->load_state, UNIT_LOADED, UNIT_ERROR, UNIT_NOT_FOUND, UNIT_MASKED)) |
c6497ccb | 923 | return sd_bus_error_setf(e, BUS_ERROR_LOAD_FAILED, "Unit %s is not loaded properly.", unit->id); |
75778e21 | 924 | |
ee87525c FB |
925 | if (type != JOB_STOP) { |
926 | r = bus_unit_check_load_state(unit, e); | |
927 | if (r < 0) | |
928 | return r; | |
75778e21 MS |
929 | } |
930 | ||
7358dc02 ZJS |
931 | if (!unit_job_is_applicable(unit, type)) |
932 | return sd_bus_error_setf(e, BUS_ERROR_JOB_TYPE_NOT_APPLICABLE, | |
933 | "Job type %s is not applicable for unit %s.", | |
934 | job_type_to_string(type), unit->id); | |
75778e21 | 935 | |
75778e21 MS |
936 | |
937 | /* First add the job. */ | |
4bd29fe5 | 938 | ret = transaction_add_one_job(tr, type, unit, &is_new); |
75778e21 MS |
939 | if (!ret) |
940 | return -ENOMEM; | |
941 | ||
942 | ret->ignore_order = ret->ignore_order || ignore_order; | |
943 | ||
944 | /* Then, add a link to the job. */ | |
e6eda1f2 MS |
945 | if (by) { |
946 | if (!job_dependency_new(by, ret, matters, conflicts)) | |
947 | return -ENOMEM; | |
948 | } else { | |
949 | /* If the job has no parent job, it is the anchor job. */ | |
4483f694 MS |
950 | assert(!tr->anchor_job); |
951 | tr->anchor_job = ret; | |
b94fbd30 | 952 | } |
e0209d83 MS |
953 | |
954 | if (is_new && !ignore_requirements && type != JOB_NOP) { | |
75778e21 MS |
955 | Set *following; |
956 | ||
957 | /* If we are following some other unit, make sure we | |
958 | * add all dependencies of everybody following. */ | |
959 | if (unit_following_set(ret->unit, &following) > 0) { | |
960 | SET_FOREACH(dep, following, i) { | |
4bd29fe5 | 961 | r = transaction_add_job_and_dependencies(tr, type, dep, ret, false, false, false, ignore_order, e); |
75778e21 | 962 | if (r < 0) { |
e0f65994 ZJS |
963 | log_unit_full(dep, |
964 | r == -ERFKILL ? LOG_INFO : LOG_WARNING, | |
965 | r, "Cannot add dependency job, ignoring: %s", | |
966 | bus_error_message(e, r)); | |
69301c17 | 967 | sd_bus_error_free(e); |
75778e21 MS |
968 | } |
969 | } | |
970 | ||
971 | set_free(following); | |
972 | } | |
973 | ||
974 | /* Finally, recursively add in all dependencies. */ | |
3742095b | 975 | if (IN_SET(type, JOB_START, JOB_RESTART)) { |
eef85c4a | 976 | HASHMAP_FOREACH_KEY(v, dep, ret->unit->dependencies[UNIT_REQUIRES], i) { |
4bd29fe5 | 977 | r = transaction_add_job_and_dependencies(tr, JOB_START, dep, ret, true, false, false, ignore_order, e); |
75778e21 | 978 | if (r < 0) { |
114400df | 979 | if (r != -EBADR) /* job type not applicable */ |
75778e21 MS |
980 | goto fail; |
981 | ||
69301c17 | 982 | sd_bus_error_free(e); |
75778e21 MS |
983 | } |
984 | } | |
985 | ||
eef85c4a | 986 | HASHMAP_FOREACH_KEY(v, dep, ret->unit->dependencies[UNIT_BINDS_TO], i) { |
4bd29fe5 | 987 | r = transaction_add_job_and_dependencies(tr, JOB_START, dep, ret, true, false, false, ignore_order, e); |
75778e21 | 988 | if (r < 0) { |
114400df | 989 | if (r != -EBADR) /* job type not applicable */ |
75778e21 MS |
990 | goto fail; |
991 | ||
69301c17 | 992 | sd_bus_error_free(e); |
75778e21 MS |
993 | } |
994 | } | |
995 | ||
eef85c4a | 996 | HASHMAP_FOREACH_KEY(v, dep, ret->unit->dependencies[UNIT_WANTS], i) { |
4bd29fe5 | 997 | r = transaction_add_job_and_dependencies(tr, JOB_START, dep, ret, false, false, false, ignore_order, e); |
75778e21 | 998 | if (r < 0) { |
114400df | 999 | /* unit masked, job type not applicable and unit not found are not considered as errors. */ |
f2341e0a | 1000 | log_unit_full(dep, |
76ec966f | 1001 | IN_SET(r, -ERFKILL, -EBADR, -ENOENT) ? LOG_DEBUG : LOG_WARNING, |
f14637fc | 1002 | r, "Cannot add dependency job, ignoring: %s", |
f2341e0a | 1003 | bus_error_message(e, r)); |
69301c17 | 1004 | sd_bus_error_free(e); |
75778e21 MS |
1005 | } |
1006 | } | |
1007 | ||
eef85c4a | 1008 | HASHMAP_FOREACH_KEY(v, dep, ret->unit->dependencies[UNIT_REQUISITE], i) { |
4bd29fe5 | 1009 | r = transaction_add_job_and_dependencies(tr, JOB_VERIFY_ACTIVE, dep, ret, true, false, false, ignore_order, e); |
75778e21 | 1010 | if (r < 0) { |
114400df | 1011 | if (r != -EBADR) /* job type not applicable */ |
75778e21 MS |
1012 | goto fail; |
1013 | ||
69301c17 | 1014 | sd_bus_error_free(e); |
75778e21 MS |
1015 | } |
1016 | } | |
1017 | ||
eef85c4a | 1018 | HASHMAP_FOREACH_KEY(v, dep, ret->unit->dependencies[UNIT_CONFLICTS], i) { |
4bd29fe5 | 1019 | r = transaction_add_job_and_dependencies(tr, JOB_STOP, dep, ret, true, true, false, ignore_order, e); |
75778e21 | 1020 | if (r < 0) { |
114400df | 1021 | if (r != -EBADR) /* job type not applicable */ |
75778e21 MS |
1022 | goto fail; |
1023 | ||
69301c17 | 1024 | sd_bus_error_free(e); |
75778e21 MS |
1025 | } |
1026 | } | |
1027 | ||
eef85c4a | 1028 | HASHMAP_FOREACH_KEY(v, dep, ret->unit->dependencies[UNIT_CONFLICTED_BY], i) { |
4bd29fe5 | 1029 | r = transaction_add_job_and_dependencies(tr, JOB_STOP, dep, ret, false, false, false, ignore_order, e); |
75778e21 | 1030 | if (r < 0) { |
f2341e0a LP |
1031 | log_unit_warning(dep, |
1032 | "Cannot add dependency job, ignoring: %s", | |
1033 | bus_error_message(e, r)); | |
69301c17 | 1034 | sd_bus_error_free(e); |
75778e21 MS |
1035 | } |
1036 | } | |
1037 | ||
1038 | } | |
1039 | ||
3742095b | 1040 | if (IN_SET(type, JOB_STOP, JOB_RESTART)) { |
ce74e769 LP |
1041 | static const UnitDependency propagate_deps[] = { |
1042 | UNIT_REQUIRED_BY, | |
1043 | UNIT_REQUISITE_OF, | |
1044 | UNIT_BOUND_BY, | |
1045 | UNIT_CONSISTS_OF, | |
1046 | }; | |
75778e21 | 1047 | |
c6497ccb | 1048 | JobType ptype; |
ce74e769 | 1049 | unsigned j; |
75778e21 | 1050 | |
c6497ccb LP |
1051 | /* We propagate STOP as STOP, but RESTART only |
1052 | * as TRY_RESTART, in order not to start | |
1053 | * dependencies that are not around. */ | |
1054 | ptype = type == JOB_RESTART ? JOB_TRY_RESTART : type; | |
1055 | ||
ce74e769 | 1056 | for (j = 0; j < ELEMENTSOF(propagate_deps); j++) |
eef85c4a | 1057 | HASHMAP_FOREACH_KEY(v, dep, ret->unit->dependencies[propagate_deps[j]], i) { |
48894cd0 | 1058 | JobType nt; |
85e9a101 | 1059 | |
48894cd0 LP |
1060 | nt = job_type_collapse(ptype, dep); |
1061 | if (nt == JOB_NOP) | |
1062 | continue; | |
1063 | ||
4bd29fe5 | 1064 | r = transaction_add_job_and_dependencies(tr, nt, dep, ret, true, false, false, ignore_order, e); |
ce74e769 | 1065 | if (r < 0) { |
114400df | 1066 | if (r != -EBADR) /* job type not applicable */ |
ce74e769 | 1067 | goto fail; |
85e9a101 | 1068 | |
718db961 | 1069 | sd_bus_error_free(e); |
ce74e769 | 1070 | } |
85e9a101 | 1071 | } |
75778e21 MS |
1072 | } |
1073 | ||
15d167f8 JW |
1074 | if (type == JOB_RELOAD) |
1075 | transaction_add_propagate_reload_jobs(tr, ret->unit, ret, ignore_order, e); | |
75778e21 | 1076 | |
e0209d83 | 1077 | /* JOB_VERIFY_STARTED require no dependency handling */ |
75778e21 MS |
1078 | } |
1079 | ||
75778e21 MS |
1080 | return 0; |
1081 | ||
1082 | fail: | |
1083 | return r; | |
1084 | } | |
1085 | ||
1086 | int transaction_add_isolate_jobs(Transaction *tr, Manager *m) { | |
1087 | Iterator i; | |
1088 | Unit *u; | |
1089 | char *k; | |
1090 | int r; | |
1091 | ||
1092 | assert(tr); | |
1093 | assert(m); | |
1094 | ||
1095 | HASHMAP_FOREACH_KEY(u, k, m->units, i) { | |
1096 | ||
1097 | /* ignore aliases */ | |
1098 | if (u->id != k) | |
1099 | continue; | |
1100 | ||
1101 | if (u->ignore_on_isolate) | |
1102 | continue; | |
1103 | ||
1104 | /* No need to stop inactive jobs */ | |
1105 | if (UNIT_IS_INACTIVE_OR_FAILED(unit_active_state(u)) && !u->job) | |
1106 | continue; | |
1107 | ||
1108 | /* Is there already something listed for this? */ | |
1109 | if (hashmap_get(tr->jobs, u)) | |
1110 | continue; | |
1111 | ||
4bd29fe5 | 1112 | r = transaction_add_job_and_dependencies(tr, JOB_STOP, u, tr->anchor_job, true, false, false, false, NULL); |
75778e21 | 1113 | if (r < 0) |
f2341e0a | 1114 | log_unit_warning_errno(u, r, "Cannot add isolate job, ignoring: %m"); |
75778e21 MS |
1115 | } |
1116 | ||
1117 | return 0; | |
1118 | } | |
1119 | ||
23ade460 | 1120 | Transaction *transaction_new(bool irreversible) { |
75778e21 MS |
1121 | Transaction *tr; |
1122 | ||
1123 | tr = new0(Transaction, 1); | |
1124 | if (!tr) | |
1125 | return NULL; | |
1126 | ||
d5099efc | 1127 | tr->jobs = hashmap_new(NULL); |
6b430fdb ZJS |
1128 | if (!tr->jobs) |
1129 | return mfree(tr); | |
75778e21 | 1130 | |
23ade460 MS |
1131 | tr->irreversible = irreversible; |
1132 | ||
75778e21 MS |
1133 | return tr; |
1134 | } | |
1135 | ||
1136 | void transaction_free(Transaction *tr) { | |
1137 | assert(hashmap_isempty(tr->jobs)); | |
1138 | hashmap_free(tr->jobs); | |
1139 | free(tr); | |
1140 | } |