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7c0436b9 LP |
1 | /*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/ |
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 | |
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 | |
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 | |
16 | Lesser General Public License for more details. | |
17 | ||
18 | You should have received a copy of the GNU Lesser General Public License | |
19 | along with systemd; If not, see <http://www.gnu.org/licenses/>. | |
20 | ***/ | |
21 | ||
f2b68789 LP |
22 | #include <unistd.h> |
23 | #include <fcntl.h> | |
24 | ||
75778e21 | 25 | #include "bus-errors.h" |
718db961 LP |
26 | #include "bus-util.h" |
27 | #include "bus-error.h" | |
28 | #include "transaction.h" | |
75778e21 MS |
29 | |
30 | static void transaction_unlink_job(Transaction *tr, Job *j, bool delete_dependencies); | |
31 | ||
32 | static void transaction_delete_job(Transaction *tr, Job *j, bool delete_dependencies) { | |
33 | assert(tr); | |
34 | assert(j); | |
35 | ||
36 | /* Deletes one job from the transaction */ | |
37 | ||
38 | transaction_unlink_job(tr, j, delete_dependencies); | |
39 | ||
d6a093d0 | 40 | job_free(j); |
75778e21 MS |
41 | } |
42 | ||
43 | static void transaction_delete_unit(Transaction *tr, Unit *u) { | |
44 | Job *j; | |
45 | ||
46 | /* Deletes all jobs associated with a certain unit from the | |
47 | * transaction */ | |
48 | ||
49 | while ((j = hashmap_get(tr->jobs, u))) | |
50 | transaction_delete_job(tr, j, true); | |
51 | } | |
52 | ||
53 | void transaction_abort(Transaction *tr) { | |
54 | Job *j; | |
55 | ||
56 | assert(tr); | |
57 | ||
58 | while ((j = hashmap_first(tr->jobs))) | |
1b9cea0c | 59 | transaction_delete_job(tr, j, false); |
75778e21 MS |
60 | |
61 | assert(hashmap_isempty(tr->jobs)); | |
75778e21 MS |
62 | } |
63 | ||
0d9989aa | 64 | static void transaction_find_jobs_that_matter_to_anchor(Job *j, unsigned generation) { |
75778e21 MS |
65 | JobDependency *l; |
66 | ||
75778e21 MS |
67 | /* A recursive sweep through the graph that marks all units |
68 | * that matter to the anchor job, i.e. are directly or | |
69 | * indirectly a dependency of the anchor job via paths that | |
70 | * are fully marked as mattering. */ | |
71 | ||
0d9989aa MS |
72 | j->matters_to_anchor = true; |
73 | j->generation = generation; | |
75778e21 | 74 | |
0d9989aa | 75 | LIST_FOREACH(subject, l, j->subject_list) { |
75778e21 MS |
76 | |
77 | /* This link does not matter */ | |
78 | if (!l->matters) | |
79 | continue; | |
80 | ||
81 | /* This unit has already been marked */ | |
82 | if (l->object->generation == generation) | |
83 | continue; | |
84 | ||
0d9989aa | 85 | transaction_find_jobs_that_matter_to_anchor(l->object, generation); |
75778e21 MS |
86 | } |
87 | } | |
88 | ||
89 | static void transaction_merge_and_delete_job(Transaction *tr, Job *j, Job *other, JobType t) { | |
90 | JobDependency *l, *last; | |
91 | ||
92 | assert(j); | |
93 | assert(other); | |
94 | assert(j->unit == other->unit); | |
95 | assert(!j->installed); | |
96 | ||
97 | /* Merges 'other' into 'j' and then deletes 'other'. */ | |
98 | ||
99 | j->type = t; | |
100 | j->state = JOB_WAITING; | |
101 | j->override = j->override || other->override; | |
23ade460 | 102 | j->irreversible = j->irreversible || other->irreversible; |
75778e21 MS |
103 | |
104 | j->matters_to_anchor = j->matters_to_anchor || other->matters_to_anchor; | |
105 | ||
106 | /* Patch us in as new owner of the JobDependency objects */ | |
107 | last = NULL; | |
108 | LIST_FOREACH(subject, l, other->subject_list) { | |
109 | assert(l->subject == other); | |
110 | l->subject = j; | |
111 | last = l; | |
112 | } | |
113 | ||
114 | /* Merge both lists */ | |
115 | if (last) { | |
116 | last->subject_next = j->subject_list; | |
117 | if (j->subject_list) | |
118 | j->subject_list->subject_prev = last; | |
119 | j->subject_list = other->subject_list; | |
120 | } | |
121 | ||
122 | /* Patch us in as new owner of the JobDependency objects */ | |
123 | last = NULL; | |
124 | LIST_FOREACH(object, l, other->object_list) { | |
125 | assert(l->object == other); | |
126 | l->object = j; | |
127 | last = l; | |
128 | } | |
129 | ||
130 | /* Merge both lists */ | |
131 | if (last) { | |
132 | last->object_next = j->object_list; | |
133 | if (j->object_list) | |
134 | j->object_list->object_prev = last; | |
135 | j->object_list = other->object_list; | |
136 | } | |
137 | ||
138 | /* Kill the other job */ | |
139 | other->subject_list = NULL; | |
140 | other->object_list = NULL; | |
141 | transaction_delete_job(tr, other, true); | |
142 | } | |
143 | ||
44a6b1b6 | 144 | _pure_ static bool job_is_conflicted_by(Job *j) { |
75778e21 MS |
145 | JobDependency *l; |
146 | ||
147 | assert(j); | |
148 | ||
149 | /* Returns true if this job is pulled in by a least one | |
150 | * ConflictedBy dependency. */ | |
151 | ||
152 | LIST_FOREACH(object, l, j->object_list) | |
153 | if (l->conflicts) | |
154 | return true; | |
155 | ||
156 | return false; | |
157 | } | |
158 | ||
159 | static int delete_one_unmergeable_job(Transaction *tr, Job *j) { | |
160 | Job *k; | |
161 | ||
162 | assert(j); | |
163 | ||
164 | /* Tries to delete one item in the linked list | |
165 | * j->transaction_next->transaction_next->... that conflicts | |
166 | * with another one, in an attempt to make an inconsistent | |
167 | * transaction work. */ | |
168 | ||
169 | /* We rely here on the fact that if a merged with b does not | |
170 | * merge with c, either a or b merge with c neither */ | |
171 | LIST_FOREACH(transaction, j, j) | |
172 | LIST_FOREACH(transaction, k, j->transaction_next) { | |
173 | Job *d; | |
174 | ||
175 | /* Is this one mergeable? Then skip it */ | |
176 | if (job_type_is_mergeable(j->type, k->type)) | |
177 | continue; | |
178 | ||
179 | /* Ok, we found two that conflict, let's see if we can | |
180 | * drop one of them */ | |
181 | if (!j->matters_to_anchor && !k->matters_to_anchor) { | |
182 | ||
183 | /* Both jobs don't matter, so let's | |
184 | * find the one that is smarter to | |
185 | * remove. Let's think positive and | |
186 | * rather remove stops then starts -- | |
187 | * except if something is being | |
188 | * stopped because it is conflicted by | |
189 | * another unit in which case we | |
190 | * rather remove the start. */ | |
191 | ||
66870f90 ZJS |
192 | log_debug_unit(j->unit->id, |
193 | "Looking at job %s/%s conflicted_by=%s", | |
194 | j->unit->id, job_type_to_string(j->type), | |
195 | yes_no(j->type == JOB_STOP && job_is_conflicted_by(j))); | |
196 | log_debug_unit(k->unit->id, | |
197 | "Looking at job %s/%s conflicted_by=%s", | |
198 | k->unit->id, job_type_to_string(k->type), | |
199 | yes_no(k->type == JOB_STOP && job_is_conflicted_by(k))); | |
75778e21 MS |
200 | |
201 | if (j->type == JOB_STOP) { | |
202 | ||
203 | if (job_is_conflicted_by(j)) | |
204 | d = k; | |
205 | else | |
206 | d = j; | |
207 | ||
208 | } else if (k->type == JOB_STOP) { | |
209 | ||
210 | if (job_is_conflicted_by(k)) | |
211 | d = j; | |
212 | else | |
213 | d = k; | |
214 | } else | |
215 | d = j; | |
216 | ||
217 | } else if (!j->matters_to_anchor) | |
218 | d = j; | |
219 | else if (!k->matters_to_anchor) | |
220 | d = k; | |
221 | else | |
222 | return -ENOEXEC; | |
223 | ||
224 | /* Ok, we can drop one, so let's do so. */ | |
66870f90 | 225 | log_debug_unit(d->unit->id, |
75cb8502 ZJS |
226 | "Fixing conflicting jobs %s/%s,%s/%s by deleting job %s/%s", |
227 | j->unit->id, job_type_to_string(j->type), | |
228 | k->unit->id, job_type_to_string(k->type), | |
66870f90 | 229 | d->unit->id, job_type_to_string(d->type)); |
75778e21 MS |
230 | transaction_delete_job(tr, d, true); |
231 | return 0; | |
232 | } | |
233 | ||
234 | return -EINVAL; | |
235 | } | |
236 | ||
718db961 | 237 | static int transaction_merge_jobs(Transaction *tr, sd_bus_error *e) { |
75778e21 MS |
238 | Job *j; |
239 | Iterator i; | |
240 | int r; | |
241 | ||
242 | assert(tr); | |
243 | ||
244 | /* First step, check whether any of the jobs for one specific | |
245 | * task conflict. If so, try to drop one of them. */ | |
246 | HASHMAP_FOREACH(j, tr->jobs, i) { | |
247 | JobType t; | |
248 | Job *k; | |
249 | ||
250 | t = j->type; | |
251 | LIST_FOREACH(transaction, k, j->transaction_next) { | |
e0209d83 | 252 | if (job_type_merge_and_collapse(&t, k->type, j->unit) >= 0) |
75778e21 MS |
253 | continue; |
254 | ||
255 | /* OK, we could not merge all jobs for this | |
256 | * action. Let's see if we can get rid of one | |
257 | * of them */ | |
258 | ||
259 | r = delete_one_unmergeable_job(tr, j); | |
260 | if (r >= 0) | |
261 | /* Ok, we managed to drop one, now | |
262 | * let's ask our callers to call us | |
263 | * again after garbage collecting */ | |
264 | return -EAGAIN; | |
265 | ||
266 | /* We couldn't merge anything. Failure */ | |
7358dc02 ZJS |
267 | return sd_bus_error_setf(e, BUS_ERROR_TRANSACTION_JOBS_CONFLICTING, |
268 | "Transaction contains conflicting jobs '%s' and '%s' for %s. " | |
269 | "Probably contradicting requirement dependencies configured.", | |
270 | job_type_to_string(t), | |
271 | job_type_to_string(k->type), | |
272 | k->unit->id); | |
75778e21 MS |
273 | } |
274 | } | |
275 | ||
276 | /* Second step, merge the jobs. */ | |
277 | HASHMAP_FOREACH(j, tr->jobs, i) { | |
278 | JobType t = j->type; | |
279 | Job *k; | |
280 | ||
e0209d83 | 281 | /* Merge all transaction jobs for j->unit */ |
75778e21 | 282 | LIST_FOREACH(transaction, k, j->transaction_next) |
e0209d83 | 283 | assert_se(job_type_merge_and_collapse(&t, k->type, j->unit) == 0); |
75778e21 | 284 | |
75778e21 | 285 | while ((k = j->transaction_next)) { |
656bbffc | 286 | if (tr->anchor_job == k) { |
75778e21 MS |
287 | transaction_merge_and_delete_job(tr, k, j, t); |
288 | j = k; | |
289 | } else | |
290 | transaction_merge_and_delete_job(tr, j, k, t); | |
291 | } | |
292 | ||
75778e21 MS |
293 | assert(!j->transaction_next); |
294 | assert(!j->transaction_prev); | |
295 | } | |
296 | ||
297 | return 0; | |
298 | } | |
299 | ||
300 | static void transaction_drop_redundant(Transaction *tr) { | |
055163ad MS |
301 | Job *j; |
302 | Iterator i; | |
75778e21 | 303 | |
055163ad MS |
304 | /* Goes through the transaction and removes all jobs of the units |
305 | * whose jobs are all noops. If not all of a unit's jobs are | |
306 | * redundant, they are kept. */ | |
75778e21 | 307 | |
055163ad | 308 | assert(tr); |
75778e21 | 309 | |
055163ad MS |
310 | rescan: |
311 | HASHMAP_FOREACH(j, tr->jobs, i) { | |
312 | Job *k; | |
75778e21 | 313 | |
055163ad | 314 | LIST_FOREACH(transaction, k, j) { |
75778e21 | 315 | |
055163ad MS |
316 | if (tr->anchor_job == k || |
317 | !job_type_is_redundant(k->type, unit_active_state(k->unit)) || | |
318 | (k->unit->job && job_type_is_conflicting(k->type, k->unit->job->type))) | |
319 | goto next_unit; | |
75778e21 MS |
320 | } |
321 | ||
055163ad MS |
322 | /* log_debug("Found redundant job %s/%s, dropping.", j->unit->id, job_type_to_string(j->type)); */ |
323 | transaction_delete_job(tr, j, false); | |
324 | goto rescan; | |
325 | next_unit:; | |
326 | } | |
75778e21 MS |
327 | } |
328 | ||
44a6b1b6 | 329 | _pure_ static bool unit_matters_to_anchor(Unit *u, Job *j) { |
75778e21 MS |
330 | assert(u); |
331 | assert(!j->transaction_prev); | |
332 | ||
333 | /* Checks whether at least one of the jobs for this unit | |
334 | * matters to the anchor. */ | |
335 | ||
336 | LIST_FOREACH(transaction, j, j) | |
337 | if (j->matters_to_anchor) | |
338 | return true; | |
339 | ||
340 | return false; | |
341 | } | |
342 | ||
718db961 | 343 | static int transaction_verify_order_one(Transaction *tr, Job *j, Job *from, unsigned generation, sd_bus_error *e) { |
75778e21 MS |
344 | Iterator i; |
345 | Unit *u; | |
346 | int r; | |
347 | ||
348 | assert(tr); | |
349 | assert(j); | |
350 | assert(!j->transaction_prev); | |
351 | ||
352 | /* Does a recursive sweep through the ordering graph, looking | |
1244d8d6 | 353 | * for a cycle. If we find a cycle we try to break it. */ |
75778e21 MS |
354 | |
355 | /* Have we seen this before? */ | |
356 | if (j->generation == generation) { | |
357 | Job *k, *delete; | |
358 | ||
359 | /* If the marker is NULL we have been here already and | |
360 | * decided the job was loop-free from here. Hence | |
361 | * shortcut things and return right-away. */ | |
362 | if (!j->marker) | |
363 | return 0; | |
364 | ||
365 | /* So, the marker is not NULL and we already have been | |
366 | * here. We have a cycle. Let's try to break it. We go | |
367 | * backwards in our path and try to find a suitable | |
368 | * job to remove. We use the marker to find our way | |
369 | * back, since smart how we are we stored our way back | |
370 | * in there. */ | |
66870f90 ZJS |
371 | log_warning_unit(j->unit->id, |
372 | "Found ordering cycle on %s/%s", | |
373 | j->unit->id, job_type_to_string(j->type)); | |
75778e21 MS |
374 | |
375 | delete = NULL; | |
376 | for (k = from; k; k = ((k->generation == generation && k->marker != k) ? k->marker : NULL)) { | |
377 | ||
66870f90 | 378 | /* logging for j not k here here to provide consistent narrative */ |
14fe721b ZJS |
379 | log_warning_unit(j->unit->id, |
380 | "Found dependency on %s/%s", | |
381 | k->unit->id, job_type_to_string(k->type)); | |
75778e21 | 382 | |
375ae4aa | 383 | if (!delete && hashmap_get(tr->jobs, k->unit) && |
75778e21 MS |
384 | !unit_matters_to_anchor(k->unit, k)) { |
385 | /* Ok, we can drop this one, so let's | |
386 | * do so. */ | |
387 | delete = k; | |
388 | } | |
389 | ||
390 | /* Check if this in fact was the beginning of | |
391 | * the cycle */ | |
392 | if (k == j) | |
393 | break; | |
394 | } | |
395 | ||
396 | ||
397 | if (delete) { | |
66870f90 ZJS |
398 | /* logging for j not k here here to provide consistent narrative */ |
399 | log_warning_unit(j->unit->id, | |
400 | "Breaking ordering cycle by deleting job %s/%s", | |
401 | delete->unit->id, job_type_to_string(delete->type)); | |
402 | log_error_unit(delete->unit->id, | |
403 | "Job %s/%s deleted to break ordering cycle starting with %s/%s", | |
404 | delete->unit->id, job_type_to_string(delete->type), | |
405 | j->unit->id, job_type_to_string(j->type)); | |
297d0749 MS |
406 | unit_status_printf(delete->unit, ANSI_HIGHLIGHT_RED_ON " SKIP " ANSI_HIGHLIGHT_OFF, |
407 | "Ordering cycle found, skipping %s"); | |
75778e21 MS |
408 | transaction_delete_unit(tr, delete->unit); |
409 | return -EAGAIN; | |
410 | } | |
411 | ||
412 | log_error("Unable to break cycle"); | |
413 | ||
7358dc02 ZJS |
414 | return sd_bus_error_setf(e, BUS_ERROR_TRANSACTION_ORDER_IS_CYCLIC, |
415 | "Transaction order is cyclic. See system logs for details."); | |
75778e21 MS |
416 | } |
417 | ||
418 | /* Make the marker point to where we come from, so that we can | |
419 | * find our way backwards if we want to break a cycle. We use | |
420 | * a special marker for the beginning: we point to | |
421 | * ourselves. */ | |
422 | j->marker = from ? from : j; | |
423 | j->generation = generation; | |
424 | ||
c5315881 | 425 | /* We assume that the dependencies are bidirectional, and |
75778e21 MS |
426 | * hence can ignore UNIT_AFTER */ |
427 | SET_FOREACH(u, j->unit->dependencies[UNIT_BEFORE], i) { | |
428 | Job *o; | |
429 | ||
430 | /* Is there a job for this unit? */ | |
431 | o = hashmap_get(tr->jobs, u); | |
432 | if (!o) { | |
433 | /* Ok, there is no job for this in the | |
434 | * transaction, but maybe there is already one | |
435 | * running? */ | |
436 | o = u->job; | |
437 | if (!o) | |
438 | continue; | |
439 | } | |
440 | ||
441 | r = transaction_verify_order_one(tr, o, j, generation, e); | |
442 | if (r < 0) | |
443 | return r; | |
444 | } | |
445 | ||
446 | /* Ok, let's backtrack, and remember that this entry is not on | |
447 | * our path anymore. */ | |
448 | j->marker = NULL; | |
449 | ||
450 | return 0; | |
451 | } | |
452 | ||
718db961 | 453 | static int transaction_verify_order(Transaction *tr, unsigned *generation, sd_bus_error *e) { |
75778e21 MS |
454 | Job *j; |
455 | int r; | |
456 | Iterator i; | |
457 | unsigned g; | |
458 | ||
459 | assert(tr); | |
460 | assert(generation); | |
461 | ||
462 | /* Check if the ordering graph is cyclic. If it is, try to fix | |
463 | * that up by dropping one of the jobs. */ | |
464 | ||
465 | g = (*generation)++; | |
466 | ||
467 | HASHMAP_FOREACH(j, tr->jobs, i) | |
468 | if ((r = transaction_verify_order_one(tr, j, NULL, g, e)) < 0) | |
469 | return r; | |
470 | ||
471 | return 0; | |
472 | } | |
473 | ||
474 | static void transaction_collect_garbage(Transaction *tr) { | |
055163ad MS |
475 | Iterator i; |
476 | Job *j; | |
75778e21 MS |
477 | |
478 | assert(tr); | |
479 | ||
480 | /* Drop jobs that are not required by any other job */ | |
481 | ||
055163ad MS |
482 | rescan: |
483 | HASHMAP_FOREACH(j, tr->jobs, i) { | |
484 | if (tr->anchor_job == j || j->object_list) { | |
485 | /* log_debug("Keeping job %s/%s because of %s/%s", */ | |
486 | /* j->unit->id, job_type_to_string(j->type), */ | |
487 | /* j->object_list->subject ? j->object_list->subject->unit->id : "root", */ | |
488 | /* j->object_list->subject ? job_type_to_string(j->object_list->subject->type) : "root"); */ | |
489 | continue; | |
75778e21 MS |
490 | } |
491 | ||
055163ad MS |
492 | /* log_debug("Garbage collecting job %s/%s", j->unit->id, job_type_to_string(j->type)); */ |
493 | transaction_delete_job(tr, j, true); | |
494 | goto rescan; | |
495 | } | |
75778e21 MS |
496 | } |
497 | ||
718db961 | 498 | static int transaction_is_destructive(Transaction *tr, JobMode mode, sd_bus_error *e) { |
75778e21 MS |
499 | Iterator i; |
500 | Job *j; | |
501 | ||
502 | assert(tr); | |
503 | ||
504 | /* Checks whether applying this transaction means that | |
505 | * existing jobs would be replaced */ | |
506 | ||
507 | HASHMAP_FOREACH(j, tr->jobs, i) { | |
508 | ||
509 | /* Assume merged */ | |
510 | assert(!j->transaction_prev); | |
511 | assert(!j->transaction_next); | |
512 | ||
23ade460 | 513 | if (j->unit->job && (mode == JOB_FAIL || j->unit->job->irreversible) && |
e0312f4d | 514 | !job_type_is_superset(j->unit->job->type, j->type)) |
7358dc02 ZJS |
515 | return sd_bus_error_setf(e, BUS_ERROR_TRANSACTION_IS_DESTRUCTIVE, |
516 | "Transaction is destructive."); | |
75778e21 MS |
517 | } |
518 | ||
519 | return 0; | |
520 | } | |
521 | ||
522 | static void transaction_minimize_impact(Transaction *tr) { | |
055163ad MS |
523 | Job *j; |
524 | Iterator i; | |
525 | ||
75778e21 MS |
526 | assert(tr); |
527 | ||
528 | /* Drops all unnecessary jobs that reverse already active jobs | |
529 | * or that stop a running service. */ | |
530 | ||
055163ad MS |
531 | rescan: |
532 | HASHMAP_FOREACH(j, tr->jobs, i) { | |
533 | LIST_FOREACH(transaction, j, j) { | |
534 | bool stops_running_service, changes_existing_job; | |
75778e21 | 535 | |
055163ad MS |
536 | /* If it matters, we shouldn't drop it */ |
537 | if (j->matters_to_anchor) | |
538 | continue; | |
75778e21 | 539 | |
055163ad MS |
540 | /* Would this stop a running service? |
541 | * Would this change an existing job? | |
542 | * If so, let's drop this entry */ | |
75778e21 | 543 | |
055163ad MS |
544 | stops_running_service = |
545 | j->type == JOB_STOP && UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(j->unit)); | |
75778e21 | 546 | |
055163ad MS |
547 | changes_existing_job = |
548 | j->unit->job && | |
549 | job_type_is_conflicting(j->type, j->unit->job->type); | |
75778e21 | 550 | |
055163ad MS |
551 | if (!stops_running_service && !changes_existing_job) |
552 | continue; | |
75778e21 | 553 | |
055163ad | 554 | if (stops_running_service) |
66870f90 ZJS |
555 | log_debug_unit(j->unit->id, |
556 | "%s/%s would stop a running service.", | |
557 | j->unit->id, job_type_to_string(j->type)); | |
75778e21 | 558 | |
055163ad | 559 | if (changes_existing_job) |
66870f90 ZJS |
560 | log_debug_unit(j->unit->id, |
561 | "%s/%s would change existing job.", | |
562 | j->unit->id, job_type_to_string(j->type)); | |
75778e21 | 563 | |
055163ad | 564 | /* Ok, let's get rid of this */ |
66870f90 ZJS |
565 | log_debug_unit(j->unit->id, |
566 | "Deleting %s/%s to minimize impact.", | |
567 | j->unit->id, job_type_to_string(j->type)); | |
75778e21 | 568 | |
055163ad MS |
569 | transaction_delete_job(tr, j, true); |
570 | goto rescan; | |
75778e21 | 571 | } |
055163ad | 572 | } |
75778e21 MS |
573 | } |
574 | ||
575 | static int transaction_apply(Transaction *tr, Manager *m, JobMode mode) { | |
576 | Iterator i; | |
577 | Job *j; | |
578 | int r; | |
579 | ||
580 | /* Moves the transaction jobs to the set of active jobs */ | |
581 | ||
255baef6 | 582 | if (mode == JOB_ISOLATE || mode == JOB_FLUSH) { |
75778e21 MS |
583 | |
584 | /* When isolating first kill all installed jobs which | |
585 | * aren't part of the new transaction */ | |
75778e21 MS |
586 | HASHMAP_FOREACH(j, m->jobs, i) { |
587 | assert(j->installed); | |
588 | ||
589 | if (hashmap_get(tr->jobs, j->unit)) | |
590 | continue; | |
591 | ||
5273510e MS |
592 | /* Not invalidating recursively. Avoids triggering |
593 | * OnFailure= actions of dependent jobs. Also avoids | |
594 | * invalidating our iterator. */ | |
595 | job_finish_and_invalidate(j, JOB_CANCELED, false); | |
75778e21 MS |
596 | } |
597 | } | |
598 | ||
599 | HASHMAP_FOREACH(j, tr->jobs, i) { | |
600 | /* Assume merged */ | |
601 | assert(!j->transaction_prev); | |
602 | assert(!j->transaction_next); | |
603 | ||
75778e21 MS |
604 | r = hashmap_put(m->jobs, UINT32_TO_PTR(j->id), j); |
605 | if (r < 0) | |
606 | goto rollback; | |
607 | } | |
608 | ||
609 | while ((j = hashmap_steal_first(tr->jobs))) { | |
656bbffc MS |
610 | Job *installed_job; |
611 | ||
75778e21 MS |
612 | /* Clean the job dependencies */ |
613 | transaction_unlink_job(tr, j, false); | |
614 | ||
656bbffc MS |
615 | installed_job = job_install(j); |
616 | if (installed_job != j) { | |
617 | /* j has been merged into a previously installed job */ | |
618 | if (tr->anchor_job == j) | |
619 | tr->anchor_job = installed_job; | |
620 | hashmap_remove(m->jobs, UINT32_TO_PTR(j->id)); | |
621 | job_free(j); | |
622 | j = installed_job; | |
623 | } | |
05d576f1 | 624 | |
75778e21 MS |
625 | job_add_to_run_queue(j); |
626 | job_add_to_dbus_queue(j); | |
627 | job_start_timer(j); | |
c65eb836 | 628 | job_shutdown_magic(j); |
75778e21 MS |
629 | } |
630 | ||
75778e21 MS |
631 | return 0; |
632 | ||
633 | rollback: | |
634 | ||
d6a093d0 | 635 | HASHMAP_FOREACH(j, tr->jobs, i) |
75778e21 | 636 | hashmap_remove(m->jobs, UINT32_TO_PTR(j->id)); |
75778e21 MS |
637 | |
638 | return r; | |
639 | } | |
640 | ||
718db961 | 641 | int transaction_activate(Transaction *tr, Manager *m, JobMode mode, sd_bus_error *e) { |
4e7bd268 MS |
642 | Iterator i; |
643 | Job *j; | |
75778e21 MS |
644 | int r; |
645 | unsigned generation = 1; | |
646 | ||
647 | assert(tr); | |
648 | ||
649 | /* This applies the changes recorded in tr->jobs to | |
650 | * the actual list of jobs, if possible. */ | |
651 | ||
4e7bd268 MS |
652 | /* Reset the generation counter of all installed jobs. The detection of cycles |
653 | * looks at installed jobs. If they had a non-zero generation from some previous | |
654 | * walk of the graph, the algorithm would break. */ | |
655 | HASHMAP_FOREACH(j, m->jobs, i) | |
656 | j->generation = 0; | |
657 | ||
75778e21 | 658 | /* First step: figure out which jobs matter */ |
0d9989aa | 659 | transaction_find_jobs_that_matter_to_anchor(tr->anchor_job, generation++); |
75778e21 MS |
660 | |
661 | /* Second step: Try not to stop any running services if | |
662 | * we don't have to. Don't try to reverse running | |
663 | * jobs if we don't have to. */ | |
664 | if (mode == JOB_FAIL) | |
665 | transaction_minimize_impact(tr); | |
666 | ||
667 | /* Third step: Drop redundant jobs */ | |
668 | transaction_drop_redundant(tr); | |
669 | ||
670 | for (;;) { | |
671 | /* Fourth step: Let's remove unneeded jobs that might | |
672 | * be lurking. */ | |
673 | if (mode != JOB_ISOLATE) | |
674 | transaction_collect_garbage(tr); | |
675 | ||
676 | /* Fifth step: verify order makes sense and correct | |
677 | * cycles if necessary and possible */ | |
678 | r = transaction_verify_order(tr, &generation, e); | |
679 | if (r >= 0) | |
680 | break; | |
681 | ||
682 | if (r != -EAGAIN) { | |
718db961 | 683 | log_warning("Requested transaction contains an unfixable cyclic ordering dependency: %s", bus_error_message(e, r)); |
75778e21 MS |
684 | return r; |
685 | } | |
686 | ||
687 | /* Let's see if the resulting transaction ordering | |
688 | * graph is still cyclic... */ | |
689 | } | |
690 | ||
691 | for (;;) { | |
692 | /* Sixth step: let's drop unmergeable entries if | |
693 | * necessary and possible, merge entries we can | |
694 | * merge */ | |
695 | r = transaction_merge_jobs(tr, e); | |
696 | if (r >= 0) | |
697 | break; | |
698 | ||
699 | if (r != -EAGAIN) { | |
718db961 | 700 | log_warning("Requested transaction contains unmergeable jobs: %s", bus_error_message(e, r)); |
75778e21 MS |
701 | return r; |
702 | } | |
703 | ||
704 | /* Seventh step: an entry got dropped, let's garbage | |
705 | * collect its dependencies. */ | |
706 | if (mode != JOB_ISOLATE) | |
707 | transaction_collect_garbage(tr); | |
708 | ||
709 | /* Let's see if the resulting transaction still has | |
710 | * unmergeable entries ... */ | |
711 | } | |
712 | ||
713 | /* Eights step: Drop redundant jobs again, if the merging now allows us to drop more. */ | |
714 | transaction_drop_redundant(tr); | |
715 | ||
716 | /* Ninth step: check whether we can actually apply this */ | |
23ade460 MS |
717 | r = transaction_is_destructive(tr, mode, e); |
718 | if (r < 0) { | |
718db961 | 719 | log_notice("Requested transaction contradicts existing jobs: %s", bus_error_message(e, r)); |
23ade460 | 720 | return r; |
75778e21 MS |
721 | } |
722 | ||
723 | /* Tenth step: apply changes */ | |
724 | r = transaction_apply(tr, m, mode); | |
725 | if (r < 0) { | |
726 | log_warning("Failed to apply transaction: %s", strerror(-r)); | |
727 | return r; | |
728 | } | |
729 | ||
730 | assert(hashmap_isempty(tr->jobs)); | |
75778e21 | 731 | |
f2b68789 LP |
732 | if (!hashmap_isempty(m->jobs)) { |
733 | /* Are there any jobs now? Then make sure we have the | |
734 | * idle pipe around. We don't really care too much | |
735 | * whether this works or not, as the idle pipe is a | |
736 | * feature for cosmetics, not actually useful for | |
737 | * anything beyond that. */ | |
738 | ||
31a7eb86 ZJS |
739 | if (m->idle_pipe[0] < 0 && m->idle_pipe[1] < 0 && |
740 | m->idle_pipe[2] < 0 && m->idle_pipe[3] < 0) { | |
f2b68789 | 741 | pipe2(m->idle_pipe, O_NONBLOCK|O_CLOEXEC); |
31a7eb86 ZJS |
742 | pipe2(m->idle_pipe + 2, O_NONBLOCK|O_CLOEXEC); |
743 | } | |
f2b68789 LP |
744 | } |
745 | ||
75778e21 MS |
746 | return 0; |
747 | } | |
748 | ||
749 | static Job* transaction_add_one_job(Transaction *tr, JobType type, Unit *unit, bool override, bool *is_new) { | |
750 | Job *j, *f; | |
751 | ||
752 | assert(tr); | |
753 | assert(unit); | |
754 | ||
755 | /* Looks for an existing prospective job and returns that. If | |
756 | * it doesn't exist it is created and added to the prospective | |
757 | * jobs list. */ | |
758 | ||
759 | f = hashmap_get(tr->jobs, unit); | |
760 | ||
761 | LIST_FOREACH(transaction, j, f) { | |
762 | assert(j->unit == unit); | |
763 | ||
764 | if (j->type == type) { | |
765 | if (is_new) | |
766 | *is_new = false; | |
767 | return j; | |
768 | } | |
769 | } | |
770 | ||
3c956cfe MS |
771 | j = job_new(unit, type); |
772 | if (!j) | |
773 | return NULL; | |
75778e21 MS |
774 | |
775 | j->generation = 0; | |
776 | j->marker = NULL; | |
777 | j->matters_to_anchor = false; | |
778 | j->override = override; | |
23ade460 | 779 | j->irreversible = tr->irreversible; |
75778e21 | 780 | |
71fda00f | 781 | LIST_PREPEND(transaction, f, j); |
75778e21 MS |
782 | |
783 | if (hashmap_replace(tr->jobs, unit, f) < 0) { | |
71fda00f | 784 | LIST_REMOVE(transaction, f, j); |
75778e21 MS |
785 | job_free(j); |
786 | return NULL; | |
787 | } | |
788 | ||
789 | if (is_new) | |
790 | *is_new = true; | |
791 | ||
792 | /* log_debug("Added job %s/%s to transaction.", unit->id, job_type_to_string(type)); */ | |
793 | ||
794 | return j; | |
795 | } | |
796 | ||
797 | static void transaction_unlink_job(Transaction *tr, Job *j, bool delete_dependencies) { | |
798 | assert(tr); | |
799 | assert(j); | |
800 | ||
801 | if (j->transaction_prev) | |
802 | j->transaction_prev->transaction_next = j->transaction_next; | |
803 | else if (j->transaction_next) | |
804 | hashmap_replace(tr->jobs, j->unit, j->transaction_next); | |
805 | else | |
806 | hashmap_remove_value(tr->jobs, j->unit, j); | |
807 | ||
808 | if (j->transaction_next) | |
809 | j->transaction_next->transaction_prev = j->transaction_prev; | |
810 | ||
811 | j->transaction_prev = j->transaction_next = NULL; | |
812 | ||
813 | while (j->subject_list) | |
e6eda1f2 | 814 | job_dependency_free(j->subject_list); |
75778e21 MS |
815 | |
816 | while (j->object_list) { | |
817 | Job *other = j->object_list->matters ? j->object_list->subject : NULL; | |
818 | ||
e6eda1f2 | 819 | job_dependency_free(j->object_list); |
75778e21 MS |
820 | |
821 | if (other && delete_dependencies) { | |
66870f90 ZJS |
822 | log_debug_unit(other->unit->id, |
823 | "Deleting job %s/%s as dependency of job %s/%s", | |
824 | other->unit->id, job_type_to_string(other->type), | |
825 | j->unit->id, job_type_to_string(j->type)); | |
75778e21 MS |
826 | transaction_delete_job(tr, other, delete_dependencies); |
827 | } | |
828 | } | |
829 | } | |
830 | ||
831 | int transaction_add_job_and_dependencies( | |
832 | Transaction *tr, | |
833 | JobType type, | |
834 | Unit *unit, | |
835 | Job *by, | |
836 | bool matters, | |
837 | bool override, | |
838 | bool conflicts, | |
839 | bool ignore_requirements, | |
840 | bool ignore_order, | |
718db961 | 841 | sd_bus_error *e) { |
75778e21 MS |
842 | Job *ret; |
843 | Iterator i; | |
844 | Unit *dep; | |
845 | int r; | |
846 | bool is_new; | |
847 | ||
848 | assert(tr); | |
849 | assert(type < _JOB_TYPE_MAX); | |
e0209d83 | 850 | assert(type < _JOB_TYPE_MAX_IN_TRANSACTION); |
75778e21 MS |
851 | assert(unit); |
852 | ||
853 | /* log_debug("Pulling in %s/%s from %s/%s", */ | |
854 | /* unit->id, job_type_to_string(type), */ | |
855 | /* by ? by->unit->id : "NA", */ | |
856 | /* by ? job_type_to_string(by->type) : "NA"); */ | |
857 | ||
7358dc02 ZJS |
858 | if (!IN_SET(unit->load_state, UNIT_LOADED, UNIT_ERROR, UNIT_NOT_FOUND, UNIT_MASKED)) |
859 | return sd_bus_error_setf(e, BUS_ERROR_LOAD_FAILED, | |
860 | "Unit %s is not loaded properly.", unit->id); | |
75778e21 | 861 | |
1244d8d6 | 862 | if (type != JOB_STOP && unit->load_state == UNIT_ERROR) { |
d8aa69b9 | 863 | if (unit->load_error == -ENOENT || unit->manager->test_run) |
7358dc02 ZJS |
864 | return sd_bus_error_setf(e, BUS_ERROR_LOAD_FAILED, |
865 | "Unit %s failed to load: %s.", | |
866 | unit->id, | |
867 | strerror(-unit->load_error)); | |
04ef5b03 | 868 | else |
7358dc02 ZJS |
869 | return sd_bus_error_setf(e, BUS_ERROR_LOAD_FAILED, |
870 | "Unit %s failed to load: %s. " | |
871 | "See system logs and 'systemctl status %s' for details.", | |
872 | unit->id, | |
873 | strerror(-unit->load_error), | |
874 | unit->id); | |
75778e21 MS |
875 | } |
876 | ||
7358dc02 ZJS |
877 | if (type != JOB_STOP && unit->load_state == UNIT_NOT_FOUND) |
878 | return sd_bus_error_setf(e, BUS_ERROR_LOAD_FAILED, | |
879 | "Unit %s failed to load: %s.", | |
880 | unit->id, strerror(-unit->load_error)); | |
1244d8d6 | 881 | |
7358dc02 ZJS |
882 | if (type != JOB_STOP && unit->load_state == UNIT_MASKED) |
883 | return sd_bus_error_setf(e, BUS_ERROR_UNIT_MASKED, | |
884 | "Unit %s is masked.", unit->id); | |
885 | ||
886 | if (!unit_job_is_applicable(unit, type)) | |
887 | return sd_bus_error_setf(e, BUS_ERROR_JOB_TYPE_NOT_APPLICABLE, | |
888 | "Job type %s is not applicable for unit %s.", | |
889 | job_type_to_string(type), unit->id); | |
75778e21 | 890 | |
75778e21 MS |
891 | |
892 | /* First add the job. */ | |
893 | ret = transaction_add_one_job(tr, type, unit, override, &is_new); | |
894 | if (!ret) | |
895 | return -ENOMEM; | |
896 | ||
897 | ret->ignore_order = ret->ignore_order || ignore_order; | |
898 | ||
899 | /* Then, add a link to the job. */ | |
e6eda1f2 MS |
900 | if (by) { |
901 | if (!job_dependency_new(by, ret, matters, conflicts)) | |
902 | return -ENOMEM; | |
903 | } else { | |
904 | /* If the job has no parent job, it is the anchor job. */ | |
4483f694 MS |
905 | assert(!tr->anchor_job); |
906 | tr->anchor_job = ret; | |
b94fbd30 | 907 | } |
e0209d83 MS |
908 | |
909 | if (is_new && !ignore_requirements && type != JOB_NOP) { | |
75778e21 MS |
910 | Set *following; |
911 | ||
912 | /* If we are following some other unit, make sure we | |
913 | * add all dependencies of everybody following. */ | |
914 | if (unit_following_set(ret->unit, &following) > 0) { | |
915 | SET_FOREACH(dep, following, i) { | |
b94fbd30 | 916 | r = transaction_add_job_and_dependencies(tr, type, dep, ret, false, override, false, false, ignore_order, e); |
75778e21 | 917 | if (r < 0) { |
66870f90 ZJS |
918 | log_warning_unit(dep->id, |
919 | "Cannot add dependency job for unit %s, ignoring: %s", | |
718db961 | 920 | dep->id, bus_error_message(e, r)); |
75778e21 MS |
921 | |
922 | if (e) | |
718db961 | 923 | sd_bus_error_free(e); |
75778e21 MS |
924 | } |
925 | } | |
926 | ||
927 | set_free(following); | |
928 | } | |
929 | ||
930 | /* Finally, recursively add in all dependencies. */ | |
e0209d83 | 931 | if (type == JOB_START || type == JOB_RESTART) { |
75778e21 | 932 | SET_FOREACH(dep, ret->unit->dependencies[UNIT_REQUIRES], i) { |
b94fbd30 | 933 | r = transaction_add_job_and_dependencies(tr, JOB_START, dep, ret, true, override, false, false, ignore_order, e); |
75778e21 MS |
934 | if (r < 0) { |
935 | if (r != -EBADR) | |
936 | goto fail; | |
937 | ||
938 | if (e) | |
718db961 | 939 | sd_bus_error_free(e); |
75778e21 MS |
940 | } |
941 | } | |
942 | ||
7f2cddae | 943 | SET_FOREACH(dep, ret->unit->dependencies[UNIT_BINDS_TO], i) { |
b94fbd30 | 944 | r = transaction_add_job_and_dependencies(tr, JOB_START, dep, ret, true, override, false, false, ignore_order, e); |
75778e21 MS |
945 | if (r < 0) { |
946 | if (r != -EBADR) | |
947 | goto fail; | |
948 | ||
949 | if (e) | |
718db961 | 950 | sd_bus_error_free(e); |
75778e21 MS |
951 | } |
952 | } | |
953 | ||
954 | SET_FOREACH(dep, ret->unit->dependencies[UNIT_REQUIRES_OVERRIDABLE], i) { | |
b94fbd30 | 955 | r = transaction_add_job_and_dependencies(tr, JOB_START, dep, ret, !override, override, false, false, ignore_order, e); |
75778e21 | 956 | if (r < 0) { |
66870f90 ZJS |
957 | log_full_unit(r == -EADDRNOTAVAIL ? LOG_DEBUG : LOG_WARNING, dep->id, |
958 | "Cannot add dependency job for unit %s, ignoring: %s", | |
718db961 | 959 | dep->id, bus_error_message(e, r)); |
75778e21 MS |
960 | |
961 | if (e) | |
718db961 | 962 | sd_bus_error_free(e); |
75778e21 MS |
963 | } |
964 | } | |
965 | ||
966 | SET_FOREACH(dep, ret->unit->dependencies[UNIT_WANTS], i) { | |
b94fbd30 | 967 | r = transaction_add_job_and_dependencies(tr, JOB_START, dep, ret, false, false, false, false, ignore_order, e); |
75778e21 | 968 | if (r < 0) { |
66870f90 ZJS |
969 | log_full_unit(r == -EADDRNOTAVAIL ? LOG_DEBUG : LOG_WARNING, dep->id, |
970 | "Cannot add dependency job for unit %s, ignoring: %s", | |
718db961 | 971 | dep->id, bus_error_message(e, r)); |
75778e21 MS |
972 | |
973 | if (e) | |
718db961 | 974 | sd_bus_error_free(e); |
75778e21 MS |
975 | } |
976 | } | |
977 | ||
978 | SET_FOREACH(dep, ret->unit->dependencies[UNIT_REQUISITE], i) { | |
b94fbd30 | 979 | r = transaction_add_job_and_dependencies(tr, JOB_VERIFY_ACTIVE, dep, ret, true, override, false, false, ignore_order, e); |
75778e21 MS |
980 | if (r < 0) { |
981 | if (r != -EBADR) | |
982 | goto fail; | |
983 | ||
984 | if (e) | |
718db961 | 985 | sd_bus_error_free(e); |
75778e21 MS |
986 | } |
987 | } | |
988 | ||
989 | SET_FOREACH(dep, ret->unit->dependencies[UNIT_REQUISITE_OVERRIDABLE], i) { | |
b94fbd30 | 990 | r = transaction_add_job_and_dependencies(tr, JOB_VERIFY_ACTIVE, dep, ret, !override, override, false, false, ignore_order, e); |
75778e21 | 991 | if (r < 0) { |
66870f90 ZJS |
992 | log_full_unit(r == -EADDRNOTAVAIL ? LOG_DEBUG : LOG_WARNING, dep->id, |
993 | "Cannot add dependency job for unit %s, ignoring: %s", | |
718db961 | 994 | dep->id, bus_error_message(e, r)); |
75778e21 MS |
995 | |
996 | if (e) | |
718db961 | 997 | sd_bus_error_free(e); |
75778e21 MS |
998 | } |
999 | } | |
1000 | ||
1001 | SET_FOREACH(dep, ret->unit->dependencies[UNIT_CONFLICTS], i) { | |
b94fbd30 | 1002 | r = transaction_add_job_and_dependencies(tr, JOB_STOP, dep, ret, true, override, true, false, ignore_order, e); |
75778e21 MS |
1003 | if (r < 0) { |
1004 | if (r != -EBADR) | |
1005 | goto fail; | |
1006 | ||
1007 | if (e) | |
718db961 | 1008 | sd_bus_error_free(e); |
75778e21 MS |
1009 | } |
1010 | } | |
1011 | ||
1012 | SET_FOREACH(dep, ret->unit->dependencies[UNIT_CONFLICTED_BY], i) { | |
b94fbd30 | 1013 | r = transaction_add_job_and_dependencies(tr, JOB_STOP, dep, ret, false, override, false, false, ignore_order, e); |
75778e21 | 1014 | if (r < 0) { |
66870f90 ZJS |
1015 | log_warning_unit(dep->id, |
1016 | "Cannot add dependency job for unit %s, ignoring: %s", | |
718db961 | 1017 | dep->id, bus_error_message(e, r)); |
75778e21 MS |
1018 | |
1019 | if (e) | |
718db961 | 1020 | sd_bus_error_free(e); |
75778e21 MS |
1021 | } |
1022 | } | |
1023 | ||
1024 | } | |
1025 | ||
e0209d83 | 1026 | if (type == JOB_STOP || type == JOB_RESTART) { |
75778e21 MS |
1027 | |
1028 | SET_FOREACH(dep, ret->unit->dependencies[UNIT_REQUIRED_BY], i) { | |
b94fbd30 | 1029 | r = transaction_add_job_and_dependencies(tr, type, dep, ret, true, override, false, false, ignore_order, e); |
75778e21 MS |
1030 | if (r < 0) { |
1031 | if (r != -EBADR) | |
1032 | goto fail; | |
1033 | ||
1034 | if (e) | |
718db961 | 1035 | sd_bus_error_free(e); |
75778e21 MS |
1036 | } |
1037 | } | |
1038 | ||
1039 | SET_FOREACH(dep, ret->unit->dependencies[UNIT_BOUND_BY], i) { | |
b94fbd30 | 1040 | r = transaction_add_job_and_dependencies(tr, type, dep, ret, true, override, false, false, ignore_order, e); |
75778e21 MS |
1041 | if (r < 0) { |
1042 | if (r != -EBADR) | |
1043 | goto fail; | |
1044 | ||
1045 | if (e) | |
718db961 | 1046 | sd_bus_error_free(e); |
75778e21 MS |
1047 | } |
1048 | } | |
85e9a101 MS |
1049 | |
1050 | SET_FOREACH(dep, ret->unit->dependencies[UNIT_CONSISTS_OF], i) { | |
1051 | r = transaction_add_job_and_dependencies(tr, type, dep, ret, true, override, false, false, ignore_order, e); | |
1052 | if (r < 0) { | |
1053 | if (r != -EBADR) | |
1054 | goto fail; | |
1055 | ||
1056 | if (e) | |
718db961 | 1057 | sd_bus_error_free(e); |
85e9a101 MS |
1058 | } |
1059 | } | |
1060 | ||
75778e21 MS |
1061 | } |
1062 | ||
e0209d83 | 1063 | if (type == JOB_RELOAD) { |
75778e21 | 1064 | |
7f2cddae | 1065 | SET_FOREACH(dep, ret->unit->dependencies[UNIT_PROPAGATES_RELOAD_TO], i) { |
b94fbd30 | 1066 | r = transaction_add_job_and_dependencies(tr, JOB_RELOAD, dep, ret, false, override, false, false, ignore_order, e); |
75778e21 | 1067 | if (r < 0) { |
66870f90 ZJS |
1068 | log_warning_unit(dep->id, |
1069 | "Cannot add dependency reload job for unit %s, ignoring: %s", | |
718db961 | 1070 | dep->id, bus_error_message(e, r)); |
75778e21 MS |
1071 | |
1072 | if (e) | |
718db961 | 1073 | sd_bus_error_free(e); |
75778e21 MS |
1074 | } |
1075 | } | |
1076 | } | |
1077 | ||
e0209d83 | 1078 | /* JOB_VERIFY_STARTED require no dependency handling */ |
75778e21 MS |
1079 | } |
1080 | ||
75778e21 MS |
1081 | return 0; |
1082 | ||
1083 | fail: | |
1084 | return r; | |
1085 | } | |
1086 | ||
1087 | int transaction_add_isolate_jobs(Transaction *tr, Manager *m) { | |
1088 | Iterator i; | |
1089 | Unit *u; | |
1090 | char *k; | |
1091 | int r; | |
1092 | ||
1093 | assert(tr); | |
1094 | assert(m); | |
1095 | ||
1096 | HASHMAP_FOREACH_KEY(u, k, m->units, i) { | |
1097 | ||
1098 | /* ignore aliases */ | |
1099 | if (u->id != k) | |
1100 | continue; | |
1101 | ||
1102 | if (u->ignore_on_isolate) | |
1103 | continue; | |
1104 | ||
1105 | /* No need to stop inactive jobs */ | |
1106 | if (UNIT_IS_INACTIVE_OR_FAILED(unit_active_state(u)) && !u->job) | |
1107 | continue; | |
1108 | ||
1109 | /* Is there already something listed for this? */ | |
1110 | if (hashmap_get(tr->jobs, u)) | |
1111 | continue; | |
1112 | ||
4483f694 | 1113 | r = transaction_add_job_and_dependencies(tr, JOB_STOP, u, tr->anchor_job, true, false, false, false, false, NULL); |
75778e21 | 1114 | if (r < 0) |
66870f90 ZJS |
1115 | log_warning_unit(u->id, |
1116 | "Cannot add isolate job for unit %s, ignoring: %s", | |
1117 | u->id, strerror(-r)); | |
75778e21 MS |
1118 | } |
1119 | ||
1120 | return 0; | |
1121 | } | |
1122 | ||
23ade460 | 1123 | Transaction *transaction_new(bool irreversible) { |
75778e21 MS |
1124 | Transaction *tr; |
1125 | ||
1126 | tr = new0(Transaction, 1); | |
1127 | if (!tr) | |
1128 | return NULL; | |
1129 | ||
d5099efc | 1130 | tr->jobs = hashmap_new(NULL); |
75778e21 MS |
1131 | if (!tr->jobs) { |
1132 | free(tr); | |
1133 | return NULL; | |
1134 | } | |
1135 | ||
23ade460 MS |
1136 | tr->irreversible = irreversible; |
1137 | ||
75778e21 MS |
1138 | return tr; |
1139 | } | |
1140 | ||
1141 | void transaction_free(Transaction *tr) { | |
1142 | assert(hashmap_isempty(tr->jobs)); | |
1143 | hashmap_free(tr->jobs); | |
1144 | free(tr); | |
1145 | } |