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7c0436b9 LP |
1 | /*** |
2 | This file is part of systemd. | |
3 | ||
4 | Copyright 2010 Lennart Poettering | |
5 | ||
6 | systemd is free software; you can redistribute it and/or modify it | |
7 | under the terms of the GNU Lesser General Public License as published by | |
8 | the Free Software Foundation; either version 2.1 of the License, or | |
9 | (at your option) any later version. | |
10 | ||
11 | systemd is distributed in the hope that it will be useful, but | |
12 | WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
14 | Lesser General Public License for more details. | |
15 | ||
16 | You should have received a copy of the GNU Lesser General Public License | |
17 | along with systemd; If not, see <http://www.gnu.org/licenses/>. | |
18 | ***/ | |
19 | ||
f2b68789 | 20 | #include <fcntl.h> |
cf0fbc49 | 21 | #include <unistd.h> |
f2b68789 | 22 | |
b5efdb8a | 23 | #include "alloc-util.h" |
96aad8d1 | 24 | #include "bus-common-errors.h" |
718db961 | 25 | #include "bus-error.h" |
288a74cc | 26 | #include "terminal-util.h" |
b5efdb8a | 27 | #include "transaction.h" |
ee87525c | 28 | #include "dbus-unit.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; | |
23ade460 | 101 | j->irreversible = j->irreversible || other->irreversible; |
75778e21 MS |
102 | j->matters_to_anchor = j->matters_to_anchor || other->matters_to_anchor; |
103 | ||
104 | /* Patch us in as new owner of the JobDependency objects */ | |
105 | last = NULL; | |
106 | LIST_FOREACH(subject, l, other->subject_list) { | |
107 | assert(l->subject == other); | |
108 | l->subject = j; | |
109 | last = l; | |
110 | } | |
111 | ||
112 | /* Merge both lists */ | |
113 | if (last) { | |
114 | last->subject_next = j->subject_list; | |
115 | if (j->subject_list) | |
116 | j->subject_list->subject_prev = last; | |
117 | j->subject_list = other->subject_list; | |
118 | } | |
119 | ||
120 | /* Patch us in as new owner of the JobDependency objects */ | |
121 | last = NULL; | |
122 | LIST_FOREACH(object, l, other->object_list) { | |
123 | assert(l->object == other); | |
124 | l->object = j; | |
125 | last = l; | |
126 | } | |
127 | ||
128 | /* Merge both lists */ | |
129 | if (last) { | |
130 | last->object_next = j->object_list; | |
131 | if (j->object_list) | |
132 | j->object_list->object_prev = last; | |
133 | j->object_list = other->object_list; | |
134 | } | |
135 | ||
136 | /* Kill the other job */ | |
137 | other->subject_list = NULL; | |
138 | other->object_list = NULL; | |
139 | transaction_delete_job(tr, other, true); | |
140 | } | |
141 | ||
44a6b1b6 | 142 | _pure_ static bool job_is_conflicted_by(Job *j) { |
75778e21 MS |
143 | JobDependency *l; |
144 | ||
145 | assert(j); | |
146 | ||
147 | /* Returns true if this job is pulled in by a least one | |
148 | * ConflictedBy dependency. */ | |
149 | ||
150 | LIST_FOREACH(object, l, j->object_list) | |
151 | if (l->conflicts) | |
152 | return true; | |
153 | ||
154 | return false; | |
155 | } | |
156 | ||
157 | static int delete_one_unmergeable_job(Transaction *tr, Job *j) { | |
158 | Job *k; | |
159 | ||
160 | assert(j); | |
161 | ||
162 | /* Tries to delete one item in the linked list | |
163 | * j->transaction_next->transaction_next->... that conflicts | |
164 | * with another one, in an attempt to make an inconsistent | |
165 | * transaction work. */ | |
166 | ||
167 | /* We rely here on the fact that if a merged with b does not | |
168 | * merge with c, either a or b merge with c neither */ | |
169 | LIST_FOREACH(transaction, j, j) | |
170 | LIST_FOREACH(transaction, k, j->transaction_next) { | |
171 | Job *d; | |
172 | ||
173 | /* Is this one mergeable? Then skip it */ | |
174 | if (job_type_is_mergeable(j->type, k->type)) | |
175 | continue; | |
176 | ||
177 | /* Ok, we found two that conflict, let's see if we can | |
178 | * drop one of them */ | |
179 | if (!j->matters_to_anchor && !k->matters_to_anchor) { | |
180 | ||
181 | /* Both jobs don't matter, so let's | |
182 | * find the one that is smarter to | |
183 | * remove. Let's think positive and | |
184 | * rather remove stops then starts -- | |
185 | * except if something is being | |
186 | * stopped because it is conflicted by | |
187 | * another unit in which case we | |
188 | * rather remove the start. */ | |
189 | ||
f2341e0a | 190 | log_unit_debug(j->unit, |
66870f90 ZJS |
191 | "Looking at job %s/%s conflicted_by=%s", |
192 | j->unit->id, job_type_to_string(j->type), | |
193 | yes_no(j->type == JOB_STOP && job_is_conflicted_by(j))); | |
f2341e0a | 194 | log_unit_debug(k->unit, |
66870f90 ZJS |
195 | "Looking at job %s/%s conflicted_by=%s", |
196 | k->unit->id, job_type_to_string(k->type), | |
197 | yes_no(k->type == JOB_STOP && job_is_conflicted_by(k))); | |
75778e21 MS |
198 | |
199 | if (j->type == JOB_STOP) { | |
200 | ||
201 | if (job_is_conflicted_by(j)) | |
202 | d = k; | |
203 | else | |
204 | d = j; | |
205 | ||
206 | } else if (k->type == JOB_STOP) { | |
207 | ||
208 | if (job_is_conflicted_by(k)) | |
209 | d = j; | |
210 | else | |
211 | d = k; | |
212 | } else | |
213 | d = j; | |
214 | ||
215 | } else if (!j->matters_to_anchor) | |
216 | d = j; | |
217 | else if (!k->matters_to_anchor) | |
218 | d = k; | |
219 | else | |
220 | return -ENOEXEC; | |
221 | ||
222 | /* Ok, we can drop one, so let's do so. */ | |
f2341e0a | 223 | log_unit_debug(d->unit, |
75cb8502 ZJS |
224 | "Fixing conflicting jobs %s/%s,%s/%s by deleting job %s/%s", |
225 | j->unit->id, job_type_to_string(j->type), | |
226 | k->unit->id, job_type_to_string(k->type), | |
66870f90 | 227 | d->unit->id, job_type_to_string(d->type)); |
75778e21 MS |
228 | transaction_delete_job(tr, d, true); |
229 | return 0; | |
230 | } | |
231 | ||
232 | return -EINVAL; | |
233 | } | |
234 | ||
718db961 | 235 | static int transaction_merge_jobs(Transaction *tr, sd_bus_error *e) { |
75778e21 MS |
236 | Job *j; |
237 | Iterator i; | |
238 | int r; | |
239 | ||
240 | assert(tr); | |
241 | ||
242 | /* First step, check whether any of the jobs for one specific | |
243 | * task conflict. If so, try to drop one of them. */ | |
244 | HASHMAP_FOREACH(j, tr->jobs, i) { | |
245 | JobType t; | |
246 | Job *k; | |
247 | ||
248 | t = j->type; | |
249 | LIST_FOREACH(transaction, k, j->transaction_next) { | |
e0209d83 | 250 | if (job_type_merge_and_collapse(&t, k->type, j->unit) >= 0) |
75778e21 MS |
251 | continue; |
252 | ||
253 | /* OK, we could not merge all jobs for this | |
254 | * action. Let's see if we can get rid of one | |
255 | * of them */ | |
256 | ||
257 | r = delete_one_unmergeable_job(tr, j); | |
258 | if (r >= 0) | |
259 | /* Ok, we managed to drop one, now | |
260 | * let's ask our callers to call us | |
261 | * again after garbage collecting */ | |
262 | return -EAGAIN; | |
263 | ||
264 | /* We couldn't merge anything. Failure */ | |
7358dc02 ZJS |
265 | return sd_bus_error_setf(e, BUS_ERROR_TRANSACTION_JOBS_CONFLICTING, |
266 | "Transaction contains conflicting jobs '%s' and '%s' for %s. " | |
267 | "Probably contradicting requirement dependencies configured.", | |
268 | job_type_to_string(t), | |
269 | job_type_to_string(k->type), | |
270 | k->unit->id); | |
75778e21 MS |
271 | } |
272 | } | |
273 | ||
274 | /* Second step, merge the jobs. */ | |
275 | HASHMAP_FOREACH(j, tr->jobs, i) { | |
276 | JobType t = j->type; | |
277 | Job *k; | |
278 | ||
e0209d83 | 279 | /* Merge all transaction jobs for j->unit */ |
75778e21 | 280 | LIST_FOREACH(transaction, k, j->transaction_next) |
e0209d83 | 281 | assert_se(job_type_merge_and_collapse(&t, k->type, j->unit) == 0); |
75778e21 | 282 | |
75778e21 | 283 | while ((k = j->transaction_next)) { |
656bbffc | 284 | if (tr->anchor_job == k) { |
75778e21 MS |
285 | transaction_merge_and_delete_job(tr, k, j, t); |
286 | j = k; | |
287 | } else | |
288 | transaction_merge_and_delete_job(tr, j, k, t); | |
289 | } | |
290 | ||
75778e21 MS |
291 | assert(!j->transaction_next); |
292 | assert(!j->transaction_prev); | |
293 | } | |
294 | ||
295 | return 0; | |
296 | } | |
297 | ||
298 | static void transaction_drop_redundant(Transaction *tr) { | |
055163ad MS |
299 | Job *j; |
300 | Iterator i; | |
75778e21 | 301 | |
055163ad MS |
302 | /* Goes through the transaction and removes all jobs of the units |
303 | * whose jobs are all noops. If not all of a unit's jobs are | |
304 | * redundant, they are kept. */ | |
75778e21 | 305 | |
055163ad | 306 | assert(tr); |
75778e21 | 307 | |
055163ad MS |
308 | rescan: |
309 | HASHMAP_FOREACH(j, tr->jobs, i) { | |
310 | Job *k; | |
75778e21 | 311 | |
055163ad | 312 | LIST_FOREACH(transaction, k, j) { |
75778e21 | 313 | |
055163ad MS |
314 | if (tr->anchor_job == k || |
315 | !job_type_is_redundant(k->type, unit_active_state(k->unit)) || | |
316 | (k->unit->job && job_type_is_conflicting(k->type, k->unit->job->type))) | |
317 | goto next_unit; | |
75778e21 MS |
318 | } |
319 | ||
055163ad MS |
320 | /* log_debug("Found redundant job %s/%s, dropping.", j->unit->id, job_type_to_string(j->type)); */ |
321 | transaction_delete_job(tr, j, false); | |
322 | goto rescan; | |
323 | next_unit:; | |
324 | } | |
75778e21 MS |
325 | } |
326 | ||
44a6b1b6 | 327 | _pure_ static bool unit_matters_to_anchor(Unit *u, Job *j) { |
75778e21 MS |
328 | assert(u); |
329 | assert(!j->transaction_prev); | |
330 | ||
331 | /* Checks whether at least one of the jobs for this unit | |
332 | * matters to the anchor. */ | |
333 | ||
334 | LIST_FOREACH(transaction, j, j) | |
335 | if (j->matters_to_anchor) | |
336 | return true; | |
337 | ||
338 | return false; | |
339 | } | |
340 | ||
924775e8 ZJS |
341 | static char* merge_unit_ids(const char* unit_log_field, char **pairs) { |
342 | char **unit_id, **job_type, *ans = NULL; | |
343 | size_t alloc = 0, size = 0, next; | |
344 | ||
345 | STRV_FOREACH_PAIR(unit_id, job_type, pairs) { | |
346 | next = strlen(unit_log_field) + strlen(*unit_id); | |
347 | if (!GREEDY_REALLOC(ans, alloc, size + next + 1)) { | |
348 | free(ans); | |
349 | return NULL; | |
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; | |
364 | int r; | |
365 | ||
366 | assert(tr); | |
367 | assert(j); | |
368 | assert(!j->transaction_prev); | |
369 | ||
370 | /* Does a recursive sweep through the ordering graph, looking | |
1244d8d6 | 371 | * for a cycle. If we find a cycle we try to break it. */ |
75778e21 MS |
372 | |
373 | /* Have we seen this before? */ | |
374 | if (j->generation == generation) { | |
924775e8 ZJS |
375 | Job *k, *delete = NULL; |
376 | _cleanup_free_ char **array = NULL, *unit_ids = NULL; | |
377 | char **unit_id, **job_type; | |
75778e21 MS |
378 | |
379 | /* If the marker is NULL we have been here already and | |
380 | * decided the job was loop-free from here. Hence | |
381 | * shortcut things and return right-away. */ | |
382 | if (!j->marker) | |
383 | return 0; | |
384 | ||
924775e8 ZJS |
385 | /* So, the marker is not NULL and we already have been here. We have |
386 | * a cycle. Let's try to break it. We go backwards in our path and | |
387 | * try to find a suitable job to remove. We use the marker to find | |
388 | * our way back, since smart how we are we stored our way back in | |
389 | * there. */ | |
390 | ||
75778e21 MS |
391 | for (k = from; k; k = ((k->generation == generation && k->marker != k) ? k->marker : NULL)) { |
392 | ||
924775e8 ZJS |
393 | /* For logging below */ |
394 | if (strv_push_pair(&array, k->unit->id, (char*) job_type_to_string(k->type)) < 0) | |
395 | log_oom(); | |
75778e21 | 396 | |
ece174c5 | 397 | if (!delete && hashmap_get(tr->jobs, k->unit) && !unit_matters_to_anchor(k->unit, k)) |
924775e8 | 398 | /* Ok, we can drop this one, so let's do so. */ |
75778e21 | 399 | delete = k; |
75778e21 | 400 | |
924775e8 | 401 | /* Check if this in fact was the beginning of the cycle */ |
75778e21 MS |
402 | if (k == j) |
403 | break; | |
404 | } | |
405 | ||
924775e8 ZJS |
406 | unit_ids = merge_unit_ids(j->manager->unit_log_field, array); /* ignore error */ |
407 | ||
408 | STRV_FOREACH_PAIR(unit_id, job_type, array) | |
409 | /* logging for j not k here to provide a consistent narrative */ | |
410 | log_struct(LOG_WARNING, | |
411 | "MESSAGE=%s: Found %s on %s/%s", | |
412 | j->unit->id, | |
413 | unit_id == array ? "ordering cycle" : "dependency", | |
414 | *unit_id, *job_type, | |
415 | unit_ids, NULL); | |
75778e21 MS |
416 | |
417 | if (delete) { | |
dc9b5816 | 418 | const char *status; |
924775e8 ZJS |
419 | /* logging for j not k here to provide a consistent narrative */ |
420 | log_struct(LOG_ERR, | |
421 | "MESSAGE=%s: Job %s/%s deleted to break ordering cycle starting with %s/%s", | |
422 | j->unit->id, delete->unit->id, job_type_to_string(delete->type), | |
423 | j->unit->id, job_type_to_string(j->type), | |
424 | unit_ids, NULL); | |
dc9b5816 ZJS |
425 | |
426 | if (log_get_show_color()) | |
427 | status = ANSI_HIGHLIGHT_RED " SKIP " ANSI_NORMAL; | |
428 | else | |
429 | status = " SKIP "; | |
430 | ||
431 | unit_status_printf(delete->unit, status, | |
297d0749 | 432 | "Ordering cycle found, skipping %s"); |
75778e21 MS |
433 | transaction_delete_unit(tr, delete->unit); |
434 | return -EAGAIN; | |
435 | } | |
436 | ||
924775e8 ZJS |
437 | log_struct(LOG_ERR, |
438 | "MESSAGE=%s: Unable to break cycle starting with %s/%s", | |
439 | j->unit->id, j->unit->id, job_type_to_string(j->type), | |
440 | unit_ids, NULL); | |
75778e21 | 441 | |
7358dc02 ZJS |
442 | return sd_bus_error_setf(e, BUS_ERROR_TRANSACTION_ORDER_IS_CYCLIC, |
443 | "Transaction order is cyclic. See system logs for details."); | |
75778e21 MS |
444 | } |
445 | ||
446 | /* Make the marker point to where we come from, so that we can | |
447 | * find our way backwards if we want to break a cycle. We use | |
448 | * a special marker for the beginning: we point to | |
449 | * ourselves. */ | |
450 | j->marker = from ? from : j; | |
451 | j->generation = generation; | |
452 | ||
c5315881 | 453 | /* We assume that the dependencies are bidirectional, and |
75778e21 MS |
454 | * hence can ignore UNIT_AFTER */ |
455 | SET_FOREACH(u, j->unit->dependencies[UNIT_BEFORE], i) { | |
456 | Job *o; | |
457 | ||
458 | /* Is there a job for this unit? */ | |
459 | o = hashmap_get(tr->jobs, u); | |
460 | if (!o) { | |
461 | /* Ok, there is no job for this in the | |
462 | * transaction, but maybe there is already one | |
463 | * running? */ | |
464 | o = u->job; | |
465 | if (!o) | |
466 | continue; | |
467 | } | |
468 | ||
469 | r = transaction_verify_order_one(tr, o, j, generation, e); | |
470 | if (r < 0) | |
471 | return r; | |
472 | } | |
473 | ||
474 | /* Ok, let's backtrack, and remember that this entry is not on | |
475 | * our path anymore. */ | |
476 | j->marker = NULL; | |
477 | ||
478 | return 0; | |
479 | } | |
480 | ||
718db961 | 481 | static int transaction_verify_order(Transaction *tr, unsigned *generation, sd_bus_error *e) { |
75778e21 MS |
482 | Job *j; |
483 | int r; | |
484 | Iterator i; | |
485 | unsigned g; | |
486 | ||
487 | assert(tr); | |
488 | assert(generation); | |
489 | ||
490 | /* Check if the ordering graph is cyclic. If it is, try to fix | |
491 | * that up by dropping one of the jobs. */ | |
492 | ||
493 | g = (*generation)++; | |
494 | ||
3cc2aff1 LP |
495 | HASHMAP_FOREACH(j, tr->jobs, i) { |
496 | r = transaction_verify_order_one(tr, j, NULL, g, e); | |
497 | if (r < 0) | |
75778e21 | 498 | return r; |
3cc2aff1 | 499 | } |
75778e21 MS |
500 | |
501 | return 0; | |
502 | } | |
503 | ||
504 | static void transaction_collect_garbage(Transaction *tr) { | |
055163ad MS |
505 | Iterator i; |
506 | Job *j; | |
75778e21 MS |
507 | |
508 | assert(tr); | |
509 | ||
510 | /* Drop jobs that are not required by any other job */ | |
511 | ||
055163ad MS |
512 | rescan: |
513 | HASHMAP_FOREACH(j, tr->jobs, i) { | |
514 | if (tr->anchor_job == j || j->object_list) { | |
515 | /* log_debug("Keeping job %s/%s because of %s/%s", */ | |
516 | /* j->unit->id, job_type_to_string(j->type), */ | |
517 | /* j->object_list->subject ? j->object_list->subject->unit->id : "root", */ | |
518 | /* j->object_list->subject ? job_type_to_string(j->object_list->subject->type) : "root"); */ | |
519 | continue; | |
75778e21 MS |
520 | } |
521 | ||
055163ad MS |
522 | /* log_debug("Garbage collecting job %s/%s", j->unit->id, job_type_to_string(j->type)); */ |
523 | transaction_delete_job(tr, j, true); | |
524 | goto rescan; | |
525 | } | |
75778e21 MS |
526 | } |
527 | ||
718db961 | 528 | static int transaction_is_destructive(Transaction *tr, JobMode mode, sd_bus_error *e) { |
75778e21 MS |
529 | Iterator i; |
530 | Job *j; | |
531 | ||
532 | assert(tr); | |
533 | ||
534 | /* Checks whether applying this transaction means that | |
535 | * existing jobs would be replaced */ | |
536 | ||
537 | HASHMAP_FOREACH(j, tr->jobs, i) { | |
538 | ||
539 | /* Assume merged */ | |
540 | assert(!j->transaction_prev); | |
541 | assert(!j->transaction_next); | |
542 | ||
23ade460 | 543 | if (j->unit->job && (mode == JOB_FAIL || j->unit->job->irreversible) && |
c21b92ff | 544 | job_type_is_conflicting(j->unit->job->type, j->type)) |
7358dc02 ZJS |
545 | return sd_bus_error_setf(e, BUS_ERROR_TRANSACTION_IS_DESTRUCTIVE, |
546 | "Transaction is destructive."); | |
75778e21 MS |
547 | } |
548 | ||
549 | return 0; | |
550 | } | |
551 | ||
552 | static void transaction_minimize_impact(Transaction *tr) { | |
055163ad MS |
553 | Job *j; |
554 | Iterator i; | |
555 | ||
75778e21 MS |
556 | assert(tr); |
557 | ||
558 | /* Drops all unnecessary jobs that reverse already active jobs | |
559 | * or that stop a running service. */ | |
560 | ||
055163ad MS |
561 | rescan: |
562 | HASHMAP_FOREACH(j, tr->jobs, i) { | |
563 | LIST_FOREACH(transaction, j, j) { | |
564 | bool stops_running_service, changes_existing_job; | |
75778e21 | 565 | |
055163ad MS |
566 | /* If it matters, we shouldn't drop it */ |
567 | if (j->matters_to_anchor) | |
568 | continue; | |
75778e21 | 569 | |
055163ad MS |
570 | /* Would this stop a running service? |
571 | * Would this change an existing job? | |
572 | * If so, let's drop this entry */ | |
75778e21 | 573 | |
055163ad MS |
574 | stops_running_service = |
575 | j->type == JOB_STOP && UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(j->unit)); | |
75778e21 | 576 | |
055163ad MS |
577 | changes_existing_job = |
578 | j->unit->job && | |
579 | job_type_is_conflicting(j->type, j->unit->job->type); | |
75778e21 | 580 | |
055163ad MS |
581 | if (!stops_running_service && !changes_existing_job) |
582 | continue; | |
75778e21 | 583 | |
055163ad | 584 | if (stops_running_service) |
f2341e0a | 585 | log_unit_debug(j->unit, |
66870f90 ZJS |
586 | "%s/%s would stop a running service.", |
587 | j->unit->id, job_type_to_string(j->type)); | |
75778e21 | 588 | |
055163ad | 589 | if (changes_existing_job) |
f2341e0a | 590 | log_unit_debug(j->unit, |
66870f90 ZJS |
591 | "%s/%s would change existing job.", |
592 | j->unit->id, job_type_to_string(j->type)); | |
75778e21 | 593 | |
055163ad | 594 | /* Ok, let's get rid of this */ |
f2341e0a | 595 | log_unit_debug(j->unit, |
66870f90 ZJS |
596 | "Deleting %s/%s to minimize impact.", |
597 | j->unit->id, job_type_to_string(j->type)); | |
75778e21 | 598 | |
055163ad MS |
599 | transaction_delete_job(tr, j, true); |
600 | goto rescan; | |
75778e21 | 601 | } |
055163ad | 602 | } |
75778e21 MS |
603 | } |
604 | ||
605 | static int transaction_apply(Transaction *tr, Manager *m, JobMode mode) { | |
606 | Iterator i; | |
607 | Job *j; | |
608 | int r; | |
609 | ||
610 | /* Moves the transaction jobs to the set of active jobs */ | |
611 | ||
255baef6 | 612 | if (mode == JOB_ISOLATE || mode == JOB_FLUSH) { |
75778e21 MS |
613 | |
614 | /* When isolating first kill all installed jobs which | |
615 | * aren't part of the new transaction */ | |
75778e21 MS |
616 | HASHMAP_FOREACH(j, m->jobs, i) { |
617 | assert(j->installed); | |
618 | ||
2de0b9e9 MO |
619 | if (j->unit->ignore_on_isolate) |
620 | continue; | |
621 | ||
75778e21 MS |
622 | if (hashmap_get(tr->jobs, j->unit)) |
623 | continue; | |
624 | ||
5273510e MS |
625 | /* Not invalidating recursively. Avoids triggering |
626 | * OnFailure= actions of dependent jobs. Also avoids | |
627 | * invalidating our iterator. */ | |
833f92ad | 628 | job_finish_and_invalidate(j, JOB_CANCELED, false, false); |
75778e21 MS |
629 | } |
630 | } | |
631 | ||
632 | HASHMAP_FOREACH(j, tr->jobs, i) { | |
633 | /* Assume merged */ | |
634 | assert(!j->transaction_prev); | |
635 | assert(!j->transaction_next); | |
636 | ||
75778e21 MS |
637 | r = hashmap_put(m->jobs, UINT32_TO_PTR(j->id), j); |
638 | if (r < 0) | |
639 | goto rollback; | |
640 | } | |
641 | ||
642 | while ((j = hashmap_steal_first(tr->jobs))) { | |
656bbffc MS |
643 | Job *installed_job; |
644 | ||
75778e21 MS |
645 | /* Clean the job dependencies */ |
646 | transaction_unlink_job(tr, j, false); | |
647 | ||
656bbffc MS |
648 | installed_job = job_install(j); |
649 | if (installed_job != j) { | |
650 | /* j has been merged into a previously installed job */ | |
651 | if (tr->anchor_job == j) | |
652 | tr->anchor_job = installed_job; | |
653 | hashmap_remove(m->jobs, UINT32_TO_PTR(j->id)); | |
654 | job_free(j); | |
655 | j = installed_job; | |
656 | } | |
05d576f1 | 657 | |
75778e21 MS |
658 | job_add_to_run_queue(j); |
659 | job_add_to_dbus_queue(j); | |
a2df3ea4 | 660 | job_start_timer(j, false); |
c65eb836 | 661 | job_shutdown_magic(j); |
75778e21 MS |
662 | } |
663 | ||
75778e21 MS |
664 | return 0; |
665 | ||
666 | rollback: | |
667 | ||
d6a093d0 | 668 | HASHMAP_FOREACH(j, tr->jobs, i) |
75778e21 | 669 | hashmap_remove(m->jobs, UINT32_TO_PTR(j->id)); |
75778e21 MS |
670 | |
671 | return r; | |
672 | } | |
673 | ||
718db961 | 674 | int transaction_activate(Transaction *tr, Manager *m, JobMode mode, sd_bus_error *e) { |
4e7bd268 MS |
675 | Iterator i; |
676 | Job *j; | |
75778e21 MS |
677 | int r; |
678 | unsigned generation = 1; | |
679 | ||
680 | assert(tr); | |
681 | ||
682 | /* This applies the changes recorded in tr->jobs to | |
683 | * the actual list of jobs, if possible. */ | |
684 | ||
4e7bd268 MS |
685 | /* Reset the generation counter of all installed jobs. The detection of cycles |
686 | * looks at installed jobs. If they had a non-zero generation from some previous | |
687 | * walk of the graph, the algorithm would break. */ | |
688 | HASHMAP_FOREACH(j, m->jobs, i) | |
689 | j->generation = 0; | |
690 | ||
75778e21 | 691 | /* First step: figure out which jobs matter */ |
0d9989aa | 692 | transaction_find_jobs_that_matter_to_anchor(tr->anchor_job, generation++); |
75778e21 MS |
693 | |
694 | /* Second step: Try not to stop any running services if | |
695 | * we don't have to. Don't try to reverse running | |
696 | * jobs if we don't have to. */ | |
697 | if (mode == JOB_FAIL) | |
698 | transaction_minimize_impact(tr); | |
699 | ||
700 | /* Third step: Drop redundant jobs */ | |
701 | transaction_drop_redundant(tr); | |
702 | ||
703 | for (;;) { | |
704 | /* Fourth step: Let's remove unneeded jobs that might | |
705 | * be lurking. */ | |
706 | if (mode != JOB_ISOLATE) | |
707 | transaction_collect_garbage(tr); | |
708 | ||
709 | /* Fifth step: verify order makes sense and correct | |
710 | * cycles if necessary and possible */ | |
711 | r = transaction_verify_order(tr, &generation, e); | |
712 | if (r >= 0) | |
713 | break; | |
714 | ||
715 | if (r != -EAGAIN) { | |
718db961 | 716 | log_warning("Requested transaction contains an unfixable cyclic ordering dependency: %s", bus_error_message(e, r)); |
75778e21 MS |
717 | return r; |
718 | } | |
719 | ||
720 | /* Let's see if the resulting transaction ordering | |
721 | * graph is still cyclic... */ | |
722 | } | |
723 | ||
724 | for (;;) { | |
725 | /* Sixth step: let's drop unmergeable entries if | |
726 | * necessary and possible, merge entries we can | |
727 | * merge */ | |
728 | r = transaction_merge_jobs(tr, e); | |
729 | if (r >= 0) | |
730 | break; | |
731 | ||
732 | if (r != -EAGAIN) { | |
718db961 | 733 | log_warning("Requested transaction contains unmergeable jobs: %s", bus_error_message(e, r)); |
75778e21 MS |
734 | return r; |
735 | } | |
736 | ||
737 | /* Seventh step: an entry got dropped, let's garbage | |
738 | * collect its dependencies. */ | |
739 | if (mode != JOB_ISOLATE) | |
740 | transaction_collect_garbage(tr); | |
741 | ||
742 | /* Let's see if the resulting transaction still has | |
743 | * unmergeable entries ... */ | |
744 | } | |
745 | ||
746 | /* Eights step: Drop redundant jobs again, if the merging now allows us to drop more. */ | |
747 | transaction_drop_redundant(tr); | |
748 | ||
749 | /* Ninth step: check whether we can actually apply this */ | |
23ade460 MS |
750 | r = transaction_is_destructive(tr, mode, e); |
751 | if (r < 0) { | |
718db961 | 752 | log_notice("Requested transaction contradicts existing jobs: %s", bus_error_message(e, r)); |
23ade460 | 753 | return r; |
75778e21 MS |
754 | } |
755 | ||
756 | /* Tenth step: apply changes */ | |
757 | r = transaction_apply(tr, m, mode); | |
23bbb0de MS |
758 | if (r < 0) |
759 | return log_warning_errno(r, "Failed to apply transaction: %m"); | |
75778e21 MS |
760 | |
761 | assert(hashmap_isempty(tr->jobs)); | |
75778e21 | 762 | |
f2b68789 LP |
763 | if (!hashmap_isempty(m->jobs)) { |
764 | /* Are there any jobs now? Then make sure we have the | |
765 | * idle pipe around. We don't really care too much | |
766 | * whether this works or not, as the idle pipe is a | |
767 | * feature for cosmetics, not actually useful for | |
768 | * anything beyond that. */ | |
769 | ||
31a7eb86 ZJS |
770 | if (m->idle_pipe[0] < 0 && m->idle_pipe[1] < 0 && |
771 | m->idle_pipe[2] < 0 && m->idle_pipe[3] < 0) { | |
1afaa7e8 LP |
772 | (void) pipe2(m->idle_pipe, O_NONBLOCK|O_CLOEXEC); |
773 | (void) pipe2(m->idle_pipe + 2, O_NONBLOCK|O_CLOEXEC); | |
31a7eb86 | 774 | } |
f2b68789 LP |
775 | } |
776 | ||
75778e21 MS |
777 | return 0; |
778 | } | |
779 | ||
4bd29fe5 | 780 | static Job* transaction_add_one_job(Transaction *tr, JobType type, Unit *unit, bool *is_new) { |
75778e21 MS |
781 | Job *j, *f; |
782 | ||
783 | assert(tr); | |
784 | assert(unit); | |
785 | ||
786 | /* Looks for an existing prospective job and returns that. If | |
787 | * it doesn't exist it is created and added to the prospective | |
788 | * jobs list. */ | |
789 | ||
790 | f = hashmap_get(tr->jobs, unit); | |
791 | ||
792 | LIST_FOREACH(transaction, j, f) { | |
793 | assert(j->unit == unit); | |
794 | ||
795 | if (j->type == type) { | |
796 | if (is_new) | |
797 | *is_new = false; | |
798 | return j; | |
799 | } | |
800 | } | |
801 | ||
3c956cfe MS |
802 | j = job_new(unit, type); |
803 | if (!j) | |
804 | return NULL; | |
75778e21 MS |
805 | |
806 | j->generation = 0; | |
807 | j->marker = NULL; | |
808 | j->matters_to_anchor = false; | |
23ade460 | 809 | j->irreversible = tr->irreversible; |
75778e21 | 810 | |
71fda00f | 811 | LIST_PREPEND(transaction, f, j); |
75778e21 MS |
812 | |
813 | if (hashmap_replace(tr->jobs, unit, f) < 0) { | |
71fda00f | 814 | LIST_REMOVE(transaction, f, j); |
75778e21 MS |
815 | job_free(j); |
816 | return NULL; | |
817 | } | |
818 | ||
819 | if (is_new) | |
820 | *is_new = true; | |
821 | ||
822 | /* log_debug("Added job %s/%s to transaction.", unit->id, job_type_to_string(type)); */ | |
823 | ||
824 | return j; | |
825 | } | |
826 | ||
827 | static void transaction_unlink_job(Transaction *tr, Job *j, bool delete_dependencies) { | |
828 | assert(tr); | |
829 | assert(j); | |
830 | ||
831 | if (j->transaction_prev) | |
832 | j->transaction_prev->transaction_next = j->transaction_next; | |
833 | else if (j->transaction_next) | |
834 | hashmap_replace(tr->jobs, j->unit, j->transaction_next); | |
835 | else | |
836 | hashmap_remove_value(tr->jobs, j->unit, j); | |
837 | ||
838 | if (j->transaction_next) | |
839 | j->transaction_next->transaction_prev = j->transaction_prev; | |
840 | ||
841 | j->transaction_prev = j->transaction_next = NULL; | |
842 | ||
843 | while (j->subject_list) | |
e6eda1f2 | 844 | job_dependency_free(j->subject_list); |
75778e21 MS |
845 | |
846 | while (j->object_list) { | |
847 | Job *other = j->object_list->matters ? j->object_list->subject : NULL; | |
848 | ||
e6eda1f2 | 849 | job_dependency_free(j->object_list); |
75778e21 MS |
850 | |
851 | if (other && delete_dependencies) { | |
f2341e0a | 852 | log_unit_debug(other->unit, |
66870f90 ZJS |
853 | "Deleting job %s/%s as dependency of job %s/%s", |
854 | other->unit->id, job_type_to_string(other->type), | |
855 | j->unit->id, job_type_to_string(j->type)); | |
75778e21 MS |
856 | transaction_delete_job(tr, other, delete_dependencies); |
857 | } | |
858 | } | |
859 | } | |
860 | ||
15d167f8 JW |
861 | void transaction_add_propagate_reload_jobs(Transaction *tr, Unit *unit, Job *by, bool ignore_order, sd_bus_error *e) { |
862 | Iterator i; | |
863 | Unit *dep; | |
864 | JobType nt; | |
865 | int r; | |
866 | ||
867 | assert(tr); | |
868 | assert(unit); | |
869 | ||
870 | SET_FOREACH(dep, unit->dependencies[UNIT_PROPAGATES_RELOAD_TO], i) { | |
871 | nt = job_type_collapse(JOB_TRY_RELOAD, dep); | |
872 | if (nt == JOB_NOP) | |
873 | continue; | |
874 | ||
875 | r = transaction_add_job_and_dependencies(tr, nt, dep, by, false, false, false, ignore_order, e); | |
876 | if (r < 0) { | |
877 | log_unit_warning(dep, | |
878 | "Cannot add dependency reload job, ignoring: %s", | |
879 | bus_error_message(e, r)); | |
880 | sd_bus_error_free(e); | |
881 | } | |
882 | } | |
883 | } | |
884 | ||
75778e21 MS |
885 | int transaction_add_job_and_dependencies( |
886 | Transaction *tr, | |
887 | JobType type, | |
888 | Unit *unit, | |
889 | Job *by, | |
890 | bool matters, | |
75778e21 MS |
891 | bool conflicts, |
892 | bool ignore_requirements, | |
893 | bool ignore_order, | |
718db961 | 894 | sd_bus_error *e) { |
75778e21 MS |
895 | Job *ret; |
896 | Iterator i; | |
897 | Unit *dep; | |
898 | int r; | |
899 | bool is_new; | |
900 | ||
901 | assert(tr); | |
902 | assert(type < _JOB_TYPE_MAX); | |
e0209d83 | 903 | assert(type < _JOB_TYPE_MAX_IN_TRANSACTION); |
75778e21 MS |
904 | assert(unit); |
905 | ||
43706330 IS |
906 | /* Before adding jobs for this unit, let's ensure that its state has been loaded |
907 | * This matters when jobs are spawned as part of coldplugging itself (see e. g. path_coldplug()). | |
908 | * This way, we "recursively" coldplug units, ensuring that we do not look at state of | |
909 | * not-yet-coldplugged units. */ | |
2c289ea8 | 910 | if (MANAGER_IS_RELOADING(unit->manager)) |
43706330 IS |
911 | unit_coldplug(unit); |
912 | ||
75778e21 MS |
913 | /* log_debug("Pulling in %s/%s from %s/%s", */ |
914 | /* unit->id, job_type_to_string(type), */ | |
915 | /* by ? by->unit->id : "NA", */ | |
916 | /* by ? job_type_to_string(by->type) : "NA"); */ | |
917 | ||
7358dc02 | 918 | if (!IN_SET(unit->load_state, UNIT_LOADED, UNIT_ERROR, UNIT_NOT_FOUND, UNIT_MASKED)) |
c6497ccb | 919 | return sd_bus_error_setf(e, BUS_ERROR_LOAD_FAILED, "Unit %s is not loaded properly.", unit->id); |
75778e21 | 920 | |
ee87525c FB |
921 | if (type != JOB_STOP) { |
922 | r = bus_unit_check_load_state(unit, e); | |
923 | if (r < 0) | |
924 | return r; | |
75778e21 MS |
925 | } |
926 | ||
7358dc02 ZJS |
927 | if (!unit_job_is_applicable(unit, type)) |
928 | return sd_bus_error_setf(e, BUS_ERROR_JOB_TYPE_NOT_APPLICABLE, | |
929 | "Job type %s is not applicable for unit %s.", | |
930 | job_type_to_string(type), unit->id); | |
75778e21 | 931 | |
75778e21 MS |
932 | |
933 | /* First add the job. */ | |
4bd29fe5 | 934 | ret = transaction_add_one_job(tr, type, unit, &is_new); |
75778e21 MS |
935 | if (!ret) |
936 | return -ENOMEM; | |
937 | ||
938 | ret->ignore_order = ret->ignore_order || ignore_order; | |
939 | ||
940 | /* Then, add a link to the job. */ | |
e6eda1f2 MS |
941 | if (by) { |
942 | if (!job_dependency_new(by, ret, matters, conflicts)) | |
943 | return -ENOMEM; | |
944 | } else { | |
945 | /* If the job has no parent job, it is the anchor job. */ | |
4483f694 MS |
946 | assert(!tr->anchor_job); |
947 | tr->anchor_job = ret; | |
b94fbd30 | 948 | } |
e0209d83 MS |
949 | |
950 | if (is_new && !ignore_requirements && type != JOB_NOP) { | |
75778e21 MS |
951 | Set *following; |
952 | ||
953 | /* If we are following some other unit, make sure we | |
954 | * add all dependencies of everybody following. */ | |
955 | if (unit_following_set(ret->unit, &following) > 0) { | |
956 | SET_FOREACH(dep, following, i) { | |
4bd29fe5 | 957 | r = transaction_add_job_and_dependencies(tr, type, dep, ret, false, false, false, ignore_order, e); |
75778e21 | 958 | if (r < 0) { |
e0f65994 ZJS |
959 | log_unit_full(dep, |
960 | r == -ERFKILL ? LOG_INFO : LOG_WARNING, | |
961 | r, "Cannot add dependency job, ignoring: %s", | |
962 | bus_error_message(e, r)); | |
69301c17 | 963 | sd_bus_error_free(e); |
75778e21 MS |
964 | } |
965 | } | |
966 | ||
967 | set_free(following); | |
968 | } | |
969 | ||
970 | /* Finally, recursively add in all dependencies. */ | |
e0209d83 | 971 | if (type == JOB_START || type == JOB_RESTART) { |
75778e21 | 972 | SET_FOREACH(dep, ret->unit->dependencies[UNIT_REQUIRES], i) { |
4bd29fe5 | 973 | r = transaction_add_job_and_dependencies(tr, JOB_START, dep, ret, true, false, false, ignore_order, e); |
75778e21 | 974 | if (r < 0) { |
114400df | 975 | if (r != -EBADR) /* job type not applicable */ |
75778e21 MS |
976 | goto fail; |
977 | ||
69301c17 | 978 | sd_bus_error_free(e); |
75778e21 MS |
979 | } |
980 | } | |
981 | ||
7f2cddae | 982 | SET_FOREACH(dep, ret->unit->dependencies[UNIT_BINDS_TO], i) { |
4bd29fe5 | 983 | r = transaction_add_job_and_dependencies(tr, JOB_START, dep, ret, true, false, false, ignore_order, e); |
75778e21 | 984 | if (r < 0) { |
114400df | 985 | if (r != -EBADR) /* job type not applicable */ |
75778e21 MS |
986 | goto fail; |
987 | ||
69301c17 | 988 | sd_bus_error_free(e); |
75778e21 MS |
989 | } |
990 | } | |
991 | ||
75778e21 | 992 | SET_FOREACH(dep, ret->unit->dependencies[UNIT_WANTS], i) { |
4bd29fe5 | 993 | r = transaction_add_job_and_dependencies(tr, JOB_START, dep, ret, false, false, false, ignore_order, e); |
75778e21 | 994 | if (r < 0) { |
114400df | 995 | /* unit masked, job type not applicable and unit not found are not considered as errors. */ |
f2341e0a | 996 | log_unit_full(dep, |
76ec966f | 997 | IN_SET(r, -ERFKILL, -EBADR, -ENOENT) ? LOG_DEBUG : LOG_WARNING, |
f14637fc | 998 | r, "Cannot add dependency job, ignoring: %s", |
f2341e0a | 999 | bus_error_message(e, r)); |
69301c17 | 1000 | sd_bus_error_free(e); |
75778e21 MS |
1001 | } |
1002 | } | |
1003 | ||
1004 | SET_FOREACH(dep, ret->unit->dependencies[UNIT_REQUISITE], i) { | |
4bd29fe5 | 1005 | r = transaction_add_job_and_dependencies(tr, JOB_VERIFY_ACTIVE, dep, ret, true, false, false, ignore_order, e); |
75778e21 | 1006 | if (r < 0) { |
114400df | 1007 | if (r != -EBADR) /* job type not applicable */ |
75778e21 MS |
1008 | goto fail; |
1009 | ||
69301c17 | 1010 | sd_bus_error_free(e); |
75778e21 MS |
1011 | } |
1012 | } | |
1013 | ||
75778e21 | 1014 | SET_FOREACH(dep, ret->unit->dependencies[UNIT_CONFLICTS], i) { |
4bd29fe5 | 1015 | r = transaction_add_job_and_dependencies(tr, JOB_STOP, dep, ret, true, true, false, ignore_order, e); |
75778e21 | 1016 | if (r < 0) { |
114400df | 1017 | if (r != -EBADR) /* job type not applicable */ |
75778e21 MS |
1018 | goto fail; |
1019 | ||
69301c17 | 1020 | sd_bus_error_free(e); |
75778e21 MS |
1021 | } |
1022 | } | |
1023 | ||
1024 | SET_FOREACH(dep, ret->unit->dependencies[UNIT_CONFLICTED_BY], i) { | |
4bd29fe5 | 1025 | r = transaction_add_job_and_dependencies(tr, JOB_STOP, dep, ret, false, false, false, ignore_order, e); |
75778e21 | 1026 | if (r < 0) { |
f2341e0a LP |
1027 | log_unit_warning(dep, |
1028 | "Cannot add dependency job, ignoring: %s", | |
1029 | bus_error_message(e, r)); | |
69301c17 | 1030 | sd_bus_error_free(e); |
75778e21 MS |
1031 | } |
1032 | } | |
1033 | ||
1034 | } | |
1035 | ||
e0209d83 | 1036 | if (type == JOB_STOP || type == JOB_RESTART) { |
ce74e769 LP |
1037 | static const UnitDependency propagate_deps[] = { |
1038 | UNIT_REQUIRED_BY, | |
1039 | UNIT_REQUISITE_OF, | |
1040 | UNIT_BOUND_BY, | |
1041 | UNIT_CONSISTS_OF, | |
1042 | }; | |
75778e21 | 1043 | |
c6497ccb | 1044 | JobType ptype; |
ce74e769 | 1045 | unsigned j; |
75778e21 | 1046 | |
c6497ccb LP |
1047 | /* We propagate STOP as STOP, but RESTART only |
1048 | * as TRY_RESTART, in order not to start | |
1049 | * dependencies that are not around. */ | |
1050 | ptype = type == JOB_RESTART ? JOB_TRY_RESTART : type; | |
1051 | ||
ce74e769 LP |
1052 | for (j = 0; j < ELEMENTSOF(propagate_deps); j++) |
1053 | SET_FOREACH(dep, ret->unit->dependencies[propagate_deps[j]], i) { | |
48894cd0 | 1054 | JobType nt; |
85e9a101 | 1055 | |
48894cd0 LP |
1056 | nt = job_type_collapse(ptype, dep); |
1057 | if (nt == JOB_NOP) | |
1058 | continue; | |
1059 | ||
4bd29fe5 | 1060 | r = transaction_add_job_and_dependencies(tr, nt, dep, ret, true, false, false, ignore_order, e); |
ce74e769 | 1061 | if (r < 0) { |
114400df | 1062 | if (r != -EBADR) /* job type not applicable */ |
ce74e769 | 1063 | goto fail; |
85e9a101 | 1064 | |
718db961 | 1065 | sd_bus_error_free(e); |
ce74e769 | 1066 | } |
85e9a101 | 1067 | } |
75778e21 MS |
1068 | } |
1069 | ||
15d167f8 JW |
1070 | if (type == JOB_RELOAD) |
1071 | transaction_add_propagate_reload_jobs(tr, ret->unit, ret, ignore_order, e); | |
75778e21 | 1072 | |
e0209d83 | 1073 | /* JOB_VERIFY_STARTED require no dependency handling */ |
75778e21 MS |
1074 | } |
1075 | ||
75778e21 MS |
1076 | return 0; |
1077 | ||
1078 | fail: | |
1079 | return r; | |
1080 | } | |
1081 | ||
1082 | int transaction_add_isolate_jobs(Transaction *tr, Manager *m) { | |
1083 | Iterator i; | |
1084 | Unit *u; | |
1085 | char *k; | |
1086 | int r; | |
1087 | ||
1088 | assert(tr); | |
1089 | assert(m); | |
1090 | ||
1091 | HASHMAP_FOREACH_KEY(u, k, m->units, i) { | |
1092 | ||
1093 | /* ignore aliases */ | |
1094 | if (u->id != k) | |
1095 | continue; | |
1096 | ||
1097 | if (u->ignore_on_isolate) | |
1098 | continue; | |
1099 | ||
1100 | /* No need to stop inactive jobs */ | |
1101 | if (UNIT_IS_INACTIVE_OR_FAILED(unit_active_state(u)) && !u->job) | |
1102 | continue; | |
1103 | ||
1104 | /* Is there already something listed for this? */ | |
1105 | if (hashmap_get(tr->jobs, u)) | |
1106 | continue; | |
1107 | ||
4bd29fe5 | 1108 | r = transaction_add_job_and_dependencies(tr, JOB_STOP, u, tr->anchor_job, true, false, false, false, NULL); |
75778e21 | 1109 | if (r < 0) |
f2341e0a | 1110 | log_unit_warning_errno(u, r, "Cannot add isolate job, ignoring: %m"); |
75778e21 MS |
1111 | } |
1112 | ||
1113 | return 0; | |
1114 | } | |
1115 | ||
23ade460 | 1116 | Transaction *transaction_new(bool irreversible) { |
75778e21 MS |
1117 | Transaction *tr; |
1118 | ||
1119 | tr = new0(Transaction, 1); | |
1120 | if (!tr) | |
1121 | return NULL; | |
1122 | ||
d5099efc | 1123 | tr->jobs = hashmap_new(NULL); |
6b430fdb ZJS |
1124 | if (!tr->jobs) |
1125 | return mfree(tr); | |
75778e21 | 1126 | |
23ade460 MS |
1127 | tr->irreversible = irreversible; |
1128 | ||
75778e21 MS |
1129 | return tr; |
1130 | } | |
1131 | ||
1132 | void transaction_free(Transaction *tr) { | |
1133 | assert(hashmap_isempty(tr->jobs)); | |
1134 | hashmap_free(tr->jobs); | |
1135 | free(tr); | |
1136 | } |