1 /* SPDX-License-Identifier: LGPL-2.1+ */
6 #include "sd-messages.h"
8 #include "alloc-util.h"
18 #include "parse-util.h"
19 #include "serialize.h"
21 #include "sort-util.h"
23 #include "stdio-util.h"
24 #include "string-table.h"
25 #include "string-util.h"
27 #include "terminal-util.h"
31 Job
* job_new_raw(Unit
*unit
) {
34 /* used for deserialization */
43 .manager
= unit
->manager
,
45 .type
= _JOB_TYPE_INVALID
,
51 Job
* job_new(Unit
*unit
, JobType type
) {
54 assert(type
< _JOB_TYPE_MAX
);
56 j
= job_new_raw(unit
);
60 j
->id
= j
->manager
->current_job_id
++;
63 /* We don't link it here, that's what job_dependency() is for */
68 void job_unlink(Job
*j
) {
70 assert(!j
->installed
);
71 assert(!j
->transaction_prev
);
72 assert(!j
->transaction_next
);
73 assert(!j
->subject_list
);
74 assert(!j
->object_list
);
76 if (j
->in_run_queue
) {
77 prioq_remove(j
->manager
->run_queue
, j
, &j
->run_queue_idx
);
78 j
->in_run_queue
= false;
81 if (j
->in_dbus_queue
) {
82 LIST_REMOVE(dbus_queue
, j
->manager
->dbus_job_queue
, j
);
83 j
->in_dbus_queue
= false;
87 LIST_REMOVE(gc_queue
, j
->manager
->gc_job_queue
, j
);
88 j
->in_gc_queue
= false;
91 j
->timer_event_source
= sd_event_source_unref(j
->timer_event_source
);
94 Job
* job_free(Job
*j
) {
96 assert(!j
->installed
);
97 assert(!j
->transaction_prev
);
98 assert(!j
->transaction_next
);
99 assert(!j
->subject_list
);
100 assert(!j
->object_list
);
104 sd_bus_track_unref(j
->bus_track
);
105 strv_free(j
->deserialized_clients
);
110 static void job_set_state(Job
*j
, JobState state
) {
113 assert(state
< _JOB_STATE_MAX
);
115 if (j
->state
== state
)
123 if (j
->state
== JOB_RUNNING
)
124 j
->unit
->manager
->n_running_jobs
++;
126 assert(j
->state
== JOB_WAITING
);
127 assert(j
->unit
->manager
->n_running_jobs
> 0);
129 j
->unit
->manager
->n_running_jobs
--;
131 if (j
->unit
->manager
->n_running_jobs
<= 0)
132 j
->unit
->manager
->jobs_in_progress_event_source
= sd_event_source_unref(j
->unit
->manager
->jobs_in_progress_event_source
);
136 void job_uninstall(Job
*j
) {
139 assert(j
->installed
);
141 job_set_state(j
, JOB_WAITING
);
143 pj
= (j
->type
== JOB_NOP
) ? &j
->unit
->nop_job
: &j
->unit
->job
;
146 /* Detach from next 'bigger' objects */
148 /* daemon-reload should be transparent to job observers */
149 if (!MANAGER_IS_RELOADING(j
->manager
))
150 bus_job_send_removed_signal(j
);
154 unit_add_to_gc_queue(j
->unit
);
156 unit_add_to_dbus_queue(j
->unit
); /* The Job property of the unit has changed now */
158 hashmap_remove_value(j
->manager
->jobs
, UINT32_TO_PTR(j
->id
), j
);
159 j
->installed
= false;
162 static bool job_type_allows_late_merge(JobType t
) {
163 /* Tells whether it is OK to merge a job of type 't' with an already
165 * Reloads cannot be merged this way. Think of the sequence:
166 * 1. Reload of a daemon is in progress; the daemon has already loaded
167 * its config file, but hasn't completed the reload operation yet.
168 * 2. Edit foo's config file.
169 * 3. Trigger another reload to have the daemon use the new config.
170 * Should the second reload job be merged into the first one, the daemon
171 * would not know about the new config.
172 * JOB_RESTART jobs on the other hand can be merged, because they get
173 * patched into JOB_START after stopping the unit. So if we see a
174 * JOB_RESTART running, it means the unit hasn't stopped yet and at
175 * this time the merge is still allowed. */
176 return t
!= JOB_RELOAD
;
179 static void job_merge_into_installed(Job
*j
, Job
*other
) {
180 assert(j
->installed
);
181 assert(j
->unit
== other
->unit
);
183 if (j
->type
!= JOB_NOP
)
184 assert_se(job_type_merge_and_collapse(&j
->type
, other
->type
, j
->unit
) == 0);
186 assert(other
->type
== JOB_NOP
);
188 j
->irreversible
= j
->irreversible
|| other
->irreversible
;
189 j
->ignore_order
= j
->ignore_order
|| other
->ignore_order
;
192 Job
* job_install(Job
*j
) {
196 assert(!j
->installed
);
197 assert(j
->type
< _JOB_TYPE_MAX_IN_TRANSACTION
);
198 assert(j
->state
== JOB_WAITING
);
200 pj
= (j
->type
== JOB_NOP
) ? &j
->unit
->nop_job
: &j
->unit
->job
;
204 if (job_type_is_conflicting(uj
->type
, j
->type
))
205 job_finish_and_invalidate(uj
, JOB_CANCELED
, false, false);
207 /* not conflicting, i.e. mergeable */
209 if (uj
->state
== JOB_WAITING
||
210 (job_type_allows_late_merge(j
->type
) && job_type_is_superset(uj
->type
, j
->type
))) {
211 job_merge_into_installed(uj
, j
);
212 log_unit_debug(uj
->unit
,
213 "Merged %s/%s into installed job %s/%s as %"PRIu32
,
214 j
->unit
->id
, job_type_to_string(j
->type
), uj
->unit
->id
,
215 job_type_to_string(uj
->type
), uj
->id
);
218 /* already running and not safe to merge into */
219 /* Patch uj to become a merged job and re-run it. */
220 /* XXX It should be safer to queue j to run after uj finishes, but it is
221 * not currently possible to have more than one installed job per unit. */
222 job_merge_into_installed(uj
, j
);
223 log_unit_debug(uj
->unit
,
224 "Merged into running job, re-running: %s/%s as %"PRIu32
,
225 uj
->unit
->id
, job_type_to_string(uj
->type
), uj
->id
);
227 job_set_state(uj
, JOB_WAITING
);
233 /* Install the job */
237 j
->manager
->n_installed_jobs
++;
238 log_unit_debug(j
->unit
,
239 "Installed new job %s/%s as %u",
240 j
->unit
->id
, job_type_to_string(j
->type
), (unsigned) j
->id
);
242 job_add_to_gc_queue(j
);
244 job_add_to_dbus_queue(j
); /* announce this job to clients */
245 unit_add_to_dbus_queue(j
->unit
); /* The Job property of the unit has changed now */
250 int job_install_deserialized(Job
*j
) {
254 assert(!j
->installed
);
256 if (j
->type
< 0 || j
->type
>= _JOB_TYPE_MAX_IN_TRANSACTION
)
257 return log_unit_debug_errno(j
->unit
, SYNTHETIC_ERRNO(EINVAL
),
258 "Invalid job type %s in deserialization.",
259 strna(job_type_to_string(j
->type
)));
261 pj
= (j
->type
== JOB_NOP
) ? &j
->unit
->nop_job
: &j
->unit
->job
;
263 return log_unit_debug_errno(j
->unit
, SYNTHETIC_ERRNO(EEXIST
),
264 "Unit already has a job installed. Not installing deserialized job.");
266 r
= hashmap_ensure_allocated(&j
->manager
->jobs
, NULL
);
270 r
= hashmap_put(j
->manager
->jobs
, UINT32_TO_PTR(j
->id
), j
);
272 return log_unit_debug_errno(j
->unit
, r
, "Job ID %" PRIu32
" already used, cannot deserialize job.", j
->id
);
274 return log_unit_debug_errno(j
->unit
, r
, "Failed to insert job into jobs hash table: %m");
279 if (j
->state
== JOB_RUNNING
)
280 j
->unit
->manager
->n_running_jobs
++;
282 log_unit_debug(j
->unit
,
283 "Reinstalled deserialized job %s/%s as %u",
284 j
->unit
->id
, job_type_to_string(j
->type
), (unsigned) j
->id
);
288 JobDependency
* job_dependency_new(Job
*subject
, Job
*object
, bool matters
, bool conflicts
) {
293 /* Adds a new job link, which encodes that the 'subject' job
294 * needs the 'object' job in some way. If 'subject' is NULL
295 * this means the 'anchor' job (i.e. the one the user
296 * explicitly asked for) is the requester. */
298 l
= new0(JobDependency
, 1);
302 l
->subject
= subject
;
304 l
->matters
= matters
;
305 l
->conflicts
= conflicts
;
308 LIST_PREPEND(subject
, subject
->subject_list
, l
);
310 LIST_PREPEND(object
, object
->object_list
, l
);
315 void job_dependency_free(JobDependency
*l
) {
319 LIST_REMOVE(subject
, l
->subject
->subject_list
, l
);
321 LIST_REMOVE(object
, l
->object
->object_list
, l
);
326 void job_dump(Job
*j
, FILE *f
, const char *prefix
) {
330 prefix
= strempty(prefix
);
334 "%s\tAction: %s -> %s\n"
336 "%s\tIrreversible: %s\n"
339 prefix
, j
->unit
->id
, job_type_to_string(j
->type
),
340 prefix
, job_state_to_string(j
->state
),
341 prefix
, yes_no(j
->irreversible
),
342 prefix
, yes_no(job_may_gc(j
)));
346 * Merging is commutative, so imagine the matrix as symmetric. We store only
347 * its lower triangle to avoid duplication. We don't store the main diagonal,
348 * because A merged with A is simply A.
350 * If the resulting type is collapsed immediately afterwards (to get rid of
351 * the JOB_RELOAD_OR_START, which lies outside the lookup function's domain),
352 * the following properties hold:
354 * Merging is associative! A merged with B, and then merged with C is the same
355 * as A merged with the result of B merged with C.
357 * Mergeability is transitive! If A can be merged with B and B with C then
360 * Also, if A merged with B cannot be merged with C, then either A or B cannot
361 * be merged with C either.
363 static const JobType job_merging_table
[] = {
364 /* What \ With * JOB_START JOB_VERIFY_ACTIVE JOB_STOP JOB_RELOAD */
365 /*********************************************************************************/
367 /*JOB_VERIFY_ACTIVE */ JOB_START
,
368 /*JOB_STOP */ -1, -1,
369 /*JOB_RELOAD */ JOB_RELOAD_OR_START
, JOB_RELOAD
, -1,
370 /*JOB_RESTART */ JOB_RESTART
, JOB_RESTART
, -1, JOB_RESTART
,
373 JobType
job_type_lookup_merge(JobType a
, JobType b
) {
374 assert_cc(ELEMENTSOF(job_merging_table
) == _JOB_TYPE_MAX_MERGING
* (_JOB_TYPE_MAX_MERGING
- 1) / 2);
375 assert(a
>= 0 && a
< _JOB_TYPE_MAX_MERGING
);
376 assert(b
>= 0 && b
< _JOB_TYPE_MAX_MERGING
);
387 return job_merging_table
[(a
- 1) * a
/ 2 + b
];
390 bool job_type_is_redundant(JobType a
, UnitActiveState b
) {
394 return IN_SET(b
, UNIT_ACTIVE
, UNIT_RELOADING
);
397 return IN_SET(b
, UNIT_INACTIVE
, UNIT_FAILED
);
399 case JOB_VERIFY_ACTIVE
:
400 return IN_SET(b
, UNIT_ACTIVE
, UNIT_RELOADING
);
408 b
== UNIT_ACTIVATING
;
414 assert_not_reached("Invalid job type");
418 JobType
job_type_collapse(JobType t
, Unit
*u
) {
423 case JOB_TRY_RESTART
:
424 s
= unit_active_state(u
);
425 if (!UNIT_IS_ACTIVE_OR_RELOADING(s
))
431 s
= unit_active_state(u
);
432 if (!UNIT_IS_ACTIVE_OR_RELOADING(s
))
437 case JOB_RELOAD_OR_START
:
438 s
= unit_active_state(u
);
439 if (!UNIT_IS_ACTIVE_OR_RELOADING(s
))
449 int job_type_merge_and_collapse(JobType
*a
, JobType b
, Unit
*u
) {
452 t
= job_type_lookup_merge(*a
, b
);
456 *a
= job_type_collapse(t
, u
);
460 static bool job_is_runnable(Job
*j
) {
465 assert(j
->installed
);
467 /* Checks whether there is any job running for the units this
468 * job needs to be running after (in the case of a 'positive'
469 * job type) or before (in the case of a 'negative' job
472 /* Note that unit types have a say in what is runnable,
473 * too. For example, if they return -EAGAIN from
474 * unit_start() they can indicate they are not
477 /* First check if there is an override */
481 if (j
->type
== JOB_NOP
)
484 HASHMAP_FOREACH_KEY(v
, other
, j
->unit
->dependencies
[UNIT_AFTER
])
485 if (other
->job
&& job_compare(j
, other
->job
, UNIT_AFTER
) > 0) {
486 log_unit_debug(j
->unit
,
487 "starting held back, waiting for: %s",
492 HASHMAP_FOREACH_KEY(v
, other
, j
->unit
->dependencies
[UNIT_BEFORE
])
493 if (other
->job
&& job_compare(j
, other
->job
, UNIT_BEFORE
) > 0) {
494 log_unit_debug(j
->unit
,
495 "stopping held back, waiting for: %s",
503 static void job_change_type(Job
*j
, JobType newtype
) {
506 log_unit_debug(j
->unit
,
507 "Converting job %s/%s -> %s/%s",
508 j
->unit
->id
, job_type_to_string(j
->type
),
509 j
->unit
->id
, job_type_to_string(newtype
));
514 _pure_
static const char* job_get_begin_status_message_format(Unit
*u
, JobType t
) {
520 return "Reloading %s.";
522 assert(IN_SET(t
, JOB_START
, JOB_STOP
));
524 format
= UNIT_VTABLE(u
)->status_message_formats
.starting_stopping
[t
== JOB_STOP
];
528 /* Return generic strings */
530 return "Starting %s.";
532 assert(t
== JOB_STOP
);
533 return "Stopping %s.";
537 static void job_print_begin_status_message(Unit
*u
, JobType t
) {
542 /* Reload status messages have traditionally not been printed to console. */
543 if (!IN_SET(t
, JOB_START
, JOB_STOP
))
546 format
= job_get_begin_status_message_format(u
, t
);
548 DISABLE_WARNING_FORMAT_NONLITERAL
;
549 unit_status_printf(u
, STATUS_TYPE_NORMAL
, "", format
);
553 static void job_log_begin_status_message(Unit
*u
, uint32_t job_id
, JobType t
) {
554 const char *format
, *mid
;
559 assert(t
< _JOB_TYPE_MAX
);
561 if (!IN_SET(t
, JOB_START
, JOB_STOP
, JOB_RELOAD
))
564 if (log_on_console()) /* Skip this if it would only go on the console anyway */
567 /* We log status messages for all units and all operations. */
569 format
= job_get_begin_status_message_format(u
, t
);
571 DISABLE_WARNING_FORMAT_NONLITERAL
;
572 (void) snprintf(buf
, sizeof buf
, format
, unit_status_string(u
));
575 mid
= t
== JOB_START
? "MESSAGE_ID=" SD_MESSAGE_UNIT_STARTING_STR
:
576 t
== JOB_STOP
? "MESSAGE_ID=" SD_MESSAGE_UNIT_STOPPING_STR
:
577 "MESSAGE_ID=" SD_MESSAGE_UNIT_RELOADING_STR
;
579 /* Note that we deliberately use LOG_MESSAGE() instead of
580 * LOG_UNIT_MESSAGE() here, since this is supposed to mimic
581 * closely what is written to screen using the status output,
582 * which is supposed the highest level, friendliest output
583 * possible, which means we should avoid the low-level unit
586 LOG_MESSAGE("%s", buf
),
587 "JOB_ID=%" PRIu32
, job_id
,
588 "JOB_TYPE=%s", job_type_to_string(t
),
590 LOG_UNIT_INVOCATION_ID(u
),
594 static void job_emit_begin_status_message(Unit
*u
, uint32_t job_id
, JobType t
) {
597 assert(t
< _JOB_TYPE_MAX
);
599 job_log_begin_status_message(u
, job_id
, t
);
600 job_print_begin_status_message(u
, t
);
603 static int job_perform_on_unit(Job
**j
) {
610 /* While we execute this operation the job might go away (for
611 * example: because it finishes immediately or is replaced by
612 * a new, conflicting job.) To make sure we don't access a
613 * freed job later on we store the id here, so that we can
614 * verify the job is still valid. */
641 assert_not_reached("Invalid job type");
644 /* Log if the job still exists and the start/stop/reload function actually did something. Note that this means
645 * for units for which there's no 'activating' phase (i.e. because we transition directly from 'inactive' to
646 * 'active') we'll possibly skip the "Starting..." message. */
647 *j
= manager_get_job(m
, id
);
649 job_emit_begin_status_message(u
, id
, t
);
654 int job_run_and_invalidate(Job
*j
) {
658 assert(j
->installed
);
659 assert(j
->type
< _JOB_TYPE_MAX_IN_TRANSACTION
);
660 assert(j
->in_run_queue
);
662 prioq_remove(j
->manager
->run_queue
, j
, &j
->run_queue_idx
);
663 j
->in_run_queue
= false;
665 if (j
->state
!= JOB_WAITING
)
668 if (!job_is_runnable(j
))
671 job_start_timer(j
, true);
672 job_set_state(j
, JOB_RUNNING
);
673 job_add_to_dbus_queue(j
);
677 case JOB_VERIFY_ACTIVE
: {
680 t
= unit_active_state(j
->unit
);
681 if (UNIT_IS_ACTIVE_OR_RELOADING(t
))
683 else if (t
== UNIT_ACTIVATING
)
693 r
= job_perform_on_unit(&j
);
695 /* If the unit type does not support starting/stopping, then simply wait. */
701 r
= job_perform_on_unit(&j
);
709 assert_not_reached("Unknown job type");
714 job_set_state(j
, JOB_WAITING
); /* Hmm, not ready after all, let's return to JOB_WAITING state */
715 else if (r
== -EALREADY
) /* already being executed */
716 r
= job_finish_and_invalidate(j
, JOB_DONE
, true, true);
717 else if (r
== -ECOMM
) /* condition failed, but all is good */
718 r
= job_finish_and_invalidate(j
, JOB_DONE
, true, false);
719 else if (r
== -EBADR
)
720 r
= job_finish_and_invalidate(j
, JOB_SKIPPED
, true, false);
721 else if (r
== -ENOEXEC
)
722 r
= job_finish_and_invalidate(j
, JOB_INVALID
, true, false);
723 else if (r
== -EPROTO
)
724 r
= job_finish_and_invalidate(j
, JOB_ASSERT
, true, false);
725 else if (r
== -EOPNOTSUPP
)
726 r
= job_finish_and_invalidate(j
, JOB_UNSUPPORTED
, true, false);
727 else if (r
== -ENOLINK
)
728 r
= job_finish_and_invalidate(j
, JOB_DEPENDENCY
, true, false);
729 else if (r
== -ESTALE
)
730 r
= job_finish_and_invalidate(j
, JOB_ONCE
, true, false);
732 r
= job_finish_and_invalidate(j
, JOB_FAILED
, true, false);
738 _pure_
static const char *job_get_done_status_message_format(Unit
*u
, JobType t
, JobResult result
) {
740 static const char *const generic_finished_start_job
[_JOB_RESULT_MAX
] = {
741 [JOB_DONE
] = "Started %s.",
742 [JOB_TIMEOUT
] = "Timed out starting %s.",
743 [JOB_FAILED
] = "Failed to start %s.",
744 [JOB_DEPENDENCY
] = "Dependency failed for %s.",
745 [JOB_ASSERT
] = "Assertion failed for %s.",
746 [JOB_UNSUPPORTED
] = "Starting of %s not supported.",
747 [JOB_COLLECTED
] = "Unnecessary job for %s was removed.",
748 [JOB_ONCE
] = "Unit %s has been started before and cannot be started again."
750 static const char *const generic_finished_stop_job
[_JOB_RESULT_MAX
] = {
751 [JOB_DONE
] = "Stopped %s.",
752 [JOB_FAILED
] = "Stopped (with error) %s.",
753 [JOB_TIMEOUT
] = "Timed out stopping %s.",
755 static const char *const generic_finished_reload_job
[_JOB_RESULT_MAX
] = {
756 [JOB_DONE
] = "Reloaded %s.",
757 [JOB_FAILED
] = "Reload failed for %s.",
758 [JOB_TIMEOUT
] = "Timed out reloading %s.",
760 /* When verify-active detects the unit is inactive, report it.
761 * Most likely a DEPEND warning from a requisiting unit will
762 * occur next and it's nice to see what was requisited. */
763 static const char *const generic_finished_verify_active_job
[_JOB_RESULT_MAX
] = {
764 [JOB_SKIPPED
] = "%s is not active.",
771 assert(t
< _JOB_TYPE_MAX
);
773 if (IN_SET(t
, JOB_START
, JOB_STOP
, JOB_RESTART
)) {
774 const UnitStatusMessageFormats
*formats
= &UNIT_VTABLE(u
)->status_message_formats
;
775 if (formats
->finished_job
) {
776 format
= formats
->finished_job(u
, t
, result
);
780 format
= t
== JOB_START
?
781 formats
->finished_start_job
[result
] :
782 formats
->finished_stop_job
[result
];
787 /* Return generic strings */
789 return generic_finished_start_job
[result
];
790 else if (IN_SET(t
, JOB_STOP
, JOB_RESTART
))
791 return generic_finished_stop_job
[result
];
792 else if (t
== JOB_RELOAD
)
793 return generic_finished_reload_job
[result
];
794 else if (t
== JOB_VERIFY_ACTIVE
)
795 return generic_finished_verify_active_job
[result
];
800 static const struct {
801 const char *color
, *word
;
802 } job_print_done_status_messages
[_JOB_RESULT_MAX
] = {
803 [JOB_DONE
] = { ANSI_OK_COLOR
, " OK " },
804 [JOB_TIMEOUT
] = { ANSI_HIGHLIGHT_RED
, " TIME " },
805 [JOB_FAILED
] = { ANSI_HIGHLIGHT_RED
, "FAILED" },
806 [JOB_DEPENDENCY
] = { ANSI_HIGHLIGHT_YELLOW
, "DEPEND" },
807 [JOB_SKIPPED
] = { ANSI_HIGHLIGHT
, " INFO " },
808 [JOB_ASSERT
] = { ANSI_HIGHLIGHT_YELLOW
, "ASSERT" },
809 [JOB_UNSUPPORTED
] = { ANSI_HIGHLIGHT_YELLOW
, "UNSUPP" },
811 [JOB_ONCE
] = { ANSI_HIGHLIGHT_RED
, " ONCE " },
814 static void job_print_done_status_message(Unit
*u
, JobType t
, JobResult result
) {
820 assert(t
< _JOB_TYPE_MAX
);
822 /* Reload status messages have traditionally not been printed to console. */
826 /* No message if the job did not actually do anything due to failed condition. */
827 if (t
== JOB_START
&& result
== JOB_DONE
&& !u
->condition_result
)
830 if (!job_print_done_status_messages
[result
].word
)
833 format
= job_get_done_status_message_format(u
, t
, result
);
837 if (log_get_show_color())
838 status
= strjoina(job_print_done_status_messages
[result
].color
,
839 job_print_done_status_messages
[result
].word
,
842 status
= job_print_done_status_messages
[result
].word
;
844 DISABLE_WARNING_FORMAT_NONLITERAL
;
845 unit_status_printf(u
,
846 result
== JOB_DONE
? STATUS_TYPE_NORMAL
: STATUS_TYPE_NOTICE
,
850 if (t
== JOB_START
&& result
== JOB_FAILED
) {
851 _cleanup_free_
char *quoted
;
853 quoted
= shell_maybe_quote(u
->id
, ESCAPE_BACKSLASH
);
854 manager_status_printf(u
->manager
, STATUS_TYPE_NORMAL
, NULL
, "See 'systemctl status %s' for details.", strna(quoted
));
858 static void job_log_done_status_message(Unit
*u
, uint32_t job_id
, JobType t
, JobResult result
) {
859 const char *format
, *mid
;
861 static const int job_result_log_level
[_JOB_RESULT_MAX
] = {
862 [JOB_DONE
] = LOG_INFO
,
863 [JOB_CANCELED
] = LOG_INFO
,
864 [JOB_TIMEOUT
] = LOG_ERR
,
865 [JOB_FAILED
] = LOG_ERR
,
866 [JOB_DEPENDENCY
] = LOG_WARNING
,
867 [JOB_SKIPPED
] = LOG_NOTICE
,
868 [JOB_INVALID
] = LOG_INFO
,
869 [JOB_ASSERT
] = LOG_WARNING
,
870 [JOB_UNSUPPORTED
] = LOG_WARNING
,
871 [JOB_COLLECTED
] = LOG_INFO
,
872 [JOB_ONCE
] = LOG_ERR
,
877 assert(t
< _JOB_TYPE_MAX
);
879 /* Skip printing if output goes to the console, and job_print_status_message()
880 will actually print something to the console. */
881 if (log_on_console() && job_print_done_status_messages
[result
].word
)
884 /* Show condition check message if the job did not actually do anything due to failed condition. */
885 if ((t
== JOB_START
&& result
== JOB_DONE
&& !u
->condition_result
) ||
886 (t
== JOB_START
&& result
== JOB_SKIPPED
)) {
888 "MESSAGE=Condition check resulted in %s being skipped.", unit_status_string(u
),
889 "JOB_ID=%" PRIu32
, job_id
,
890 "JOB_TYPE=%s", job_type_to_string(t
),
891 "JOB_RESULT=%s", job_result_to_string(result
),
893 LOG_UNIT_INVOCATION_ID(u
),
894 "MESSAGE_ID=" SD_MESSAGE_UNIT_STARTED_STR
);
899 format
= job_get_done_status_message_format(u
, t
, result
);
903 /* The description might be longer than the buffer, but that's OK,
904 * we'll just truncate it here. Note that we use snprintf() rather than
905 * xsprintf() on purpose here: we are fine with truncation and don't
906 * consider that an error. */
907 DISABLE_WARNING_FORMAT_NONLITERAL
;
908 (void) snprintf(buf
, sizeof(buf
), format
, unit_status_string(u
));
914 if (result
== JOB_DONE
)
915 mid
= "MESSAGE_ID=" SD_MESSAGE_UNIT_STARTED_STR
;
917 mid
= "MESSAGE_ID=" SD_MESSAGE_UNIT_FAILED_STR
;
921 mid
= "MESSAGE_ID=" SD_MESSAGE_UNIT_RELOADED_STR
;
926 mid
= "MESSAGE_ID=" SD_MESSAGE_UNIT_STOPPED_STR
;
930 log_struct(job_result_log_level
[result
],
931 LOG_MESSAGE("%s", buf
),
932 "JOB_ID=%" PRIu32
, job_id
,
933 "JOB_TYPE=%s", job_type_to_string(t
),
934 "JOB_RESULT=%s", job_result_to_string(result
),
936 LOG_UNIT_INVOCATION_ID(u
));
940 log_struct(job_result_log_level
[result
],
941 LOG_MESSAGE("%s", buf
),
942 "JOB_ID=%" PRIu32
, job_id
,
943 "JOB_TYPE=%s", job_type_to_string(t
),
944 "JOB_RESULT=%s", job_result_to_string(result
),
946 LOG_UNIT_INVOCATION_ID(u
),
950 static void job_emit_done_status_message(Unit
*u
, uint32_t job_id
, JobType t
, JobResult result
) {
953 job_log_done_status_message(u
, job_id
, t
, result
);
954 job_print_done_status_message(u
, t
, result
);
957 static void job_fail_dependencies(Unit
*u
, UnitDependency d
) {
963 HASHMAP_FOREACH_KEY(v
, other
, u
->dependencies
[d
]) {
968 if (!IN_SET(j
->type
, JOB_START
, JOB_VERIFY_ACTIVE
))
971 job_finish_and_invalidate(j
, JOB_DEPENDENCY
, true, false);
975 int job_finish_and_invalidate(Job
*j
, JobResult result
, bool recursive
, bool already
) {
982 assert(j
->installed
);
983 assert(j
->type
< _JOB_TYPE_MAX_IN_TRANSACTION
);
990 log_unit_debug(u
, "Job %" PRIu32
" %s/%s finished, result=%s",
991 j
->id
, u
->id
, job_type_to_string(t
), job_result_to_string(result
));
993 /* If this job did nothing to the respective unit we don't log the status message */
995 job_emit_done_status_message(u
, j
->id
, t
, result
);
997 /* Patch restart jobs so that they become normal start jobs */
998 if (result
== JOB_DONE
&& t
== JOB_RESTART
) {
1000 job_change_type(j
, JOB_START
);
1001 job_set_state(j
, JOB_WAITING
);
1003 job_add_to_dbus_queue(j
);
1004 job_add_to_run_queue(j
);
1005 job_add_to_gc_queue(j
);
1010 if (IN_SET(result
, JOB_FAILED
, JOB_INVALID
))
1011 j
->manager
->n_failed_jobs
++;
1016 /* Fail depending jobs on failure */
1017 if (result
!= JOB_DONE
&& recursive
) {
1018 if (IN_SET(t
, JOB_START
, JOB_VERIFY_ACTIVE
)) {
1019 job_fail_dependencies(u
, UNIT_REQUIRED_BY
);
1020 job_fail_dependencies(u
, UNIT_REQUISITE_OF
);
1021 job_fail_dependencies(u
, UNIT_BOUND_BY
);
1022 } else if (t
== JOB_STOP
)
1023 job_fail_dependencies(u
, UNIT_CONFLICTED_BY
);
1026 /* A special check to make sure we take down anything RequisiteOf if we
1027 * aren't active. This is when the verify-active job merges with a
1028 * satisfying job type, and then loses it's invalidation effect, as the
1029 * result there is JOB_DONE for the start job we merged into, while we
1030 * should be failing the depending job if the said unit isn't in fact
1031 * active. Oneshots are an example of this, where going directly from
1032 * activating to inactive is success.
1034 * This happens when you use ConditionXYZ= in a unit too, since in that
1035 * case the job completes with the JOB_DONE result, but the unit never
1036 * really becomes active. Note that such a case still involves merging:
1038 * A start job waits for something else, and a verify-active comes in
1039 * and merges in the installed job. Then, later, when it becomes
1040 * runnable, it finishes with JOB_DONE result as execution on conditions
1041 * not being met is skipped, breaking our dependency semantics.
1043 * Also, depending on if start job waits or not, the merging may or may
1044 * not happen (the verify-active job may trigger after it finishes), so
1045 * you get undeterministic results without this check.
1047 if (result
== JOB_DONE
&& recursive
&& !UNIT_IS_ACTIVE_OR_RELOADING(unit_active_state(u
))) {
1048 if (IN_SET(t
, JOB_START
, JOB_RELOAD
))
1049 job_fail_dependencies(u
, UNIT_REQUISITE_OF
);
1051 /* Trigger OnFailure dependencies that are not generated by
1052 * the unit itself. We don't treat JOB_CANCELED as failure in
1053 * this context. And JOB_FAILURE is already handled by the
1055 if (IN_SET(result
, JOB_TIMEOUT
, JOB_DEPENDENCY
)) {
1056 log_struct(LOG_NOTICE
,
1057 "JOB_TYPE=%s", job_type_to_string(t
),
1058 "JOB_RESULT=%s", job_result_to_string(result
),
1060 LOG_UNIT_MESSAGE(u
, "Job %s/%s failed with result '%s'.",
1062 job_type_to_string(t
),
1063 job_result_to_string(result
)));
1065 unit_start_on_failure(u
);
1068 unit_trigger_notify(u
);
1071 /* Try to start the next jobs that can be started */
1072 HASHMAP_FOREACH_KEY(v
, other
, u
->dependencies
[UNIT_AFTER
])
1074 job_add_to_run_queue(other
->job
);
1075 job_add_to_gc_queue(other
->job
);
1077 HASHMAP_FOREACH_KEY(v
, other
, u
->dependencies
[UNIT_BEFORE
])
1079 job_add_to_run_queue(other
->job
);
1080 job_add_to_gc_queue(other
->job
);
1083 manager_check_finished(u
->manager
);
1088 static int job_dispatch_timer(sd_event_source
*s
, uint64_t monotonic
, void *userdata
) {
1093 assert(s
== j
->timer_event_source
);
1095 log_unit_warning(j
->unit
, "Job %s/%s timed out.", j
->unit
->id
, job_type_to_string(j
->type
));
1098 job_finish_and_invalidate(j
, JOB_TIMEOUT
, true, false);
1100 emergency_action(u
->manager
, u
->job_timeout_action
,
1101 EMERGENCY_ACTION_IS_WATCHDOG
|EMERGENCY_ACTION_WARN
,
1102 u
->job_timeout_reboot_arg
, -1, "job timed out");
1107 int job_start_timer(Job
*j
, bool job_running
) {
1109 usec_t timeout_time
, old_timeout_time
;
1112 j
->begin_running_usec
= now(CLOCK_MONOTONIC
);
1114 if (j
->unit
->job_running_timeout
== USEC_INFINITY
)
1117 timeout_time
= usec_add(j
->begin_running_usec
, j
->unit
->job_running_timeout
);
1119 if (j
->timer_event_source
) {
1120 /* Update only if JobRunningTimeoutSec= results in earlier timeout */
1121 r
= sd_event_source_get_time(j
->timer_event_source
, &old_timeout_time
);
1125 if (old_timeout_time
<= timeout_time
)
1128 return sd_event_source_set_time(j
->timer_event_source
, timeout_time
);
1131 if (j
->timer_event_source
)
1134 j
->begin_usec
= now(CLOCK_MONOTONIC
);
1136 if (j
->unit
->job_timeout
== USEC_INFINITY
)
1139 timeout_time
= usec_add(j
->begin_usec
, j
->unit
->job_timeout
);
1142 r
= sd_event_add_time(
1144 &j
->timer_event_source
,
1147 job_dispatch_timer
, j
);
1151 (void) sd_event_source_set_description(j
->timer_event_source
, "job-start");
1156 void job_add_to_run_queue(Job
*j
) {
1160 assert(j
->installed
);
1162 if (j
->in_run_queue
)
1165 if (prioq_isempty(j
->manager
->run_queue
)) {
1166 r
= sd_event_source_set_enabled(j
->manager
->run_queue_event_source
, SD_EVENT_ONESHOT
);
1168 log_warning_errno(r
, "Failed to enable job run queue event source, ignoring: %m");
1171 r
= prioq_put(j
->manager
->run_queue
, j
, &j
->run_queue_idx
);
1173 log_warning_errno(r
, "Failed put job in run queue, ignoring: %m");
1175 j
->in_run_queue
= true;
1178 void job_add_to_dbus_queue(Job
*j
) {
1180 assert(j
->installed
);
1182 if (j
->in_dbus_queue
)
1185 /* We don't check if anybody is subscribed here, since this
1186 * job might just have been created and not yet assigned to a
1187 * connection/client. */
1189 LIST_PREPEND(dbus_queue
, j
->manager
->dbus_job_queue
, j
);
1190 j
->in_dbus_queue
= true;
1193 char *job_dbus_path(Job
*j
) {
1198 if (asprintf(&p
, "/org/freedesktop/systemd1/job/%"PRIu32
, j
->id
) < 0)
1204 int job_serialize(Job
*j
, FILE *f
) {
1208 (void) serialize_item_format(f
, "job-id", "%u", j
->id
);
1209 (void) serialize_item(f
, "job-type", job_type_to_string(j
->type
));
1210 (void) serialize_item(f
, "job-state", job_state_to_string(j
->state
));
1211 (void) serialize_bool(f
, "job-irreversible", j
->irreversible
);
1212 (void) serialize_bool(f
, "job-sent-dbus-new-signal", j
->sent_dbus_new_signal
);
1213 (void) serialize_bool(f
, "job-ignore-order", j
->ignore_order
);
1215 if (j
->begin_usec
> 0)
1216 (void) serialize_usec(f
, "job-begin", j
->begin_usec
);
1217 if (j
->begin_running_usec
> 0)
1218 (void) serialize_usec(f
, "job-begin-running", j
->begin_running_usec
);
1220 bus_track_serialize(j
->bus_track
, f
, "subscribed");
1227 int job_deserialize(Job
*j
, FILE *f
) {
1234 _cleanup_free_
char *line
= NULL
;
1238 r
= read_line(f
, LONG_LINE_MAX
, &line
);
1240 return log_error_errno(r
, "Failed to read serialization line: %m");
1250 k
= strcspn(l
, "=");
1258 if (streq(l
, "job-id")) {
1260 if (safe_atou32(v
, &j
->id
) < 0)
1261 log_debug("Failed to parse job id value: %s", v
);
1263 } else if (streq(l
, "job-type")) {
1266 t
= job_type_from_string(v
);
1268 log_debug("Failed to parse job type: %s", v
);
1269 else if (t
>= _JOB_TYPE_MAX_IN_TRANSACTION
)
1270 log_debug("Cannot deserialize job of type: %s", v
);
1274 } else if (streq(l
, "job-state")) {
1277 s
= job_state_from_string(v
);
1279 log_debug("Failed to parse job state: %s", v
);
1281 job_set_state(j
, s
);
1283 } else if (streq(l
, "job-irreversible")) {
1286 b
= parse_boolean(v
);
1288 log_debug("Failed to parse job irreversible flag: %s", v
);
1290 j
->irreversible
= j
->irreversible
|| b
;
1292 } else if (streq(l
, "job-sent-dbus-new-signal")) {
1295 b
= parse_boolean(v
);
1297 log_debug("Failed to parse job sent_dbus_new_signal flag: %s", v
);
1299 j
->sent_dbus_new_signal
= j
->sent_dbus_new_signal
|| b
;
1301 } else if (streq(l
, "job-ignore-order")) {
1304 b
= parse_boolean(v
);
1306 log_debug("Failed to parse job ignore_order flag: %s", v
);
1308 j
->ignore_order
= j
->ignore_order
|| b
;
1310 } else if (streq(l
, "job-begin"))
1311 (void) deserialize_usec(v
, &j
->begin_usec
);
1313 else if (streq(l
, "job-begin-running"))
1314 (void) deserialize_usec(v
, &j
->begin_running_usec
);
1316 else if (streq(l
, "subscribed")) {
1317 if (strv_extend(&j
->deserialized_clients
, v
) < 0)
1320 log_debug("Unknown job serialization key: %s", l
);
1324 int job_coldplug(Job
*j
) {
1326 usec_t timeout_time
= USEC_INFINITY
;
1330 /* After deserialization is complete and the bus connection
1331 * set up again, let's start watching our subscribers again */
1332 (void) bus_job_coldplug_bus_track(j
);
1334 if (j
->state
== JOB_WAITING
)
1335 job_add_to_run_queue(j
);
1337 /* Maybe due to new dependencies we don't actually need this job anymore? */
1338 job_add_to_gc_queue(j
);
1340 /* Create timer only when job began or began running and the respective timeout is finite.
1341 * Follow logic of job_start_timer() if both timeouts are finite */
1342 if (j
->begin_usec
== 0)
1345 if (j
->unit
->job_timeout
!= USEC_INFINITY
)
1346 timeout_time
= usec_add(j
->begin_usec
, j
->unit
->job_timeout
);
1348 if (timestamp_is_set(j
->begin_running_usec
))
1349 timeout_time
= MIN(timeout_time
, usec_add(j
->begin_running_usec
, j
->unit
->job_running_timeout
));
1351 if (timeout_time
== USEC_INFINITY
)
1354 j
->timer_event_source
= sd_event_source_unref(j
->timer_event_source
);
1356 r
= sd_event_add_time(
1358 &j
->timer_event_source
,
1361 job_dispatch_timer
, j
);
1363 log_debug_errno(r
, "Failed to restart timeout for job: %m");
1365 (void) sd_event_source_set_description(j
->timer_event_source
, "job-timeout");
1370 void job_shutdown_magic(Job
*j
) {
1373 /* The shutdown target gets some special treatment here: we
1374 * tell the kernel to begin with flushing its disk caches, to
1375 * optimize shutdown time a bit. Ideally we wouldn't hardcode
1376 * this magic into PID 1. However all other processes aren't
1377 * options either since they'd exit much sooner than PID 1 and
1378 * asynchronous sync() would cause their exit to be
1381 if (j
->type
!= JOB_START
)
1384 if (!MANAGER_IS_SYSTEM(j
->unit
->manager
))
1387 if (!unit_has_name(j
->unit
, SPECIAL_SHUTDOWN_TARGET
))
1390 /* In case messages on console has been disabled on boot */
1391 j
->unit
->manager
->no_console_output
= false;
1393 if (detect_container() > 0)
1396 (void) asynchronous_sync(NULL
);
1399 int job_get_timeout(Job
*j
, usec_t
*timeout
) {
1400 usec_t x
= USEC_INFINITY
, y
= USEC_INFINITY
;
1406 if (j
->timer_event_source
) {
1407 r
= sd_event_source_get_time(j
->timer_event_source
, &x
);
1412 if (UNIT_VTABLE(u
)->get_timeout
) {
1413 r
= UNIT_VTABLE(u
)->get_timeout(u
, &y
);
1418 if (x
== USEC_INFINITY
&& y
== USEC_INFINITY
)
1421 *timeout
= MIN(x
, y
);
1425 bool job_may_gc(Job
*j
) {
1431 /* Checks whether this job should be GC'ed away. We only do this for jobs of units that have no effect on their
1432 * own and just track external state. For now the only unit type that qualifies for this are .device units.
1433 * Returns true if the job can be collected. */
1435 if (!UNIT_VTABLE(j
->unit
)->gc_jobs
)
1438 if (sd_bus_track_count(j
->bus_track
) > 0)
1441 /* FIXME: So this is a bit ugly: for now we don't properly track references made via private bus connections
1442 * (because it's nasty, as sd_bus_track doesn't apply to it). We simply remember that the job was once
1443 * referenced by one, and reset this whenever we notice that no private bus connections are around. This means
1444 * the GC is a bit too conservative when it comes to jobs created by private bus connections. */
1445 if (j
->ref_by_private_bus
) {
1446 if (set_isempty(j
->unit
->manager
->private_buses
))
1447 j
->ref_by_private_bus
= false;
1452 if (j
->type
== JOB_NOP
)
1455 /* The logic is inverse to job_is_runnable, we cannot GC as long as we block any job. */
1456 HASHMAP_FOREACH_KEY(v
, other
, j
->unit
->dependencies
[UNIT_BEFORE
])
1457 if (other
->job
&& job_compare(j
, other
->job
, UNIT_BEFORE
) < 0)
1460 HASHMAP_FOREACH_KEY(v
, other
, j
->unit
->dependencies
[UNIT_AFTER
])
1461 if (other
->job
&& job_compare(j
, other
->job
, UNIT_AFTER
) < 0)
1467 void job_add_to_gc_queue(Job
*j
) {
1476 LIST_PREPEND(gc_queue
, j
->unit
->manager
->gc_job_queue
, j
);
1477 j
->in_gc_queue
= true;
1480 static int job_compare_id(Job
* const *a
, Job
* const *b
) {
1481 return CMP((*a
)->id
, (*b
)->id
);
1484 static size_t sort_job_list(Job
**list
, size_t n
) {
1485 Job
*previous
= NULL
;
1488 /* Order by numeric IDs */
1489 typesafe_qsort(list
, n
, job_compare_id
);
1491 /* Filter out duplicates */
1492 for (a
= 0, b
= 0; a
< n
; a
++) {
1494 if (previous
== list
[a
])
1497 previous
= list
[b
++] = list
[a
];
1503 int job_get_before(Job
*j
, Job
*** ret
) {
1504 _cleanup_free_ Job
** list
= NULL
;
1505 size_t n
= 0, n_allocated
= 0;
1509 /* Returns a list of all pending jobs that need to finish before this job may be started. */
1514 if (j
->ignore_order
) {
1519 HASHMAP_FOREACH_KEY(v
, other
, j
->unit
->dependencies
[UNIT_AFTER
]) {
1522 if (job_compare(j
, other
->job
, UNIT_AFTER
) <= 0)
1525 if (!GREEDY_REALLOC(list
, n_allocated
, n
+1))
1527 list
[n
++] = other
->job
;
1530 HASHMAP_FOREACH_KEY(v
, other
, j
->unit
->dependencies
[UNIT_BEFORE
]) {
1533 if (job_compare(j
, other
->job
, UNIT_BEFORE
) <= 0)
1536 if (!GREEDY_REALLOC(list
, n_allocated
, n
+1))
1538 list
[n
++] = other
->job
;
1541 n
= sort_job_list(list
, n
);
1543 *ret
= TAKE_PTR(list
);
1548 int job_get_after(Job
*j
, Job
*** ret
) {
1549 _cleanup_free_ Job
** list
= NULL
;
1550 size_t n
= 0, n_allocated
= 0;
1557 /* Returns a list of all pending jobs that are waiting for this job to finish. */
1559 HASHMAP_FOREACH_KEY(v
, other
, j
->unit
->dependencies
[UNIT_BEFORE
]) {
1563 if (other
->job
->ignore_order
)
1566 if (job_compare(j
, other
->job
, UNIT_BEFORE
) >= 0)
1569 if (!GREEDY_REALLOC(list
, n_allocated
, n
+1))
1571 list
[n
++] = other
->job
;
1574 HASHMAP_FOREACH_KEY(v
, other
, j
->unit
->dependencies
[UNIT_AFTER
]) {
1578 if (other
->job
->ignore_order
)
1581 if (job_compare(j
, other
->job
, UNIT_AFTER
) >= 0)
1584 if (!GREEDY_REALLOC(list
, n_allocated
, n
+1))
1586 list
[n
++] = other
->job
;
1589 n
= sort_job_list(list
, n
);
1591 *ret
= TAKE_PTR(list
);
1596 static const char* const job_state_table
[_JOB_STATE_MAX
] = {
1597 [JOB_WAITING
] = "waiting",
1598 [JOB_RUNNING
] = "running",
1601 DEFINE_STRING_TABLE_LOOKUP(job_state
, JobState
);
1603 static const char* const job_type_table
[_JOB_TYPE_MAX
] = {
1604 [JOB_START
] = "start",
1605 [JOB_VERIFY_ACTIVE
] = "verify-active",
1606 [JOB_STOP
] = "stop",
1607 [JOB_RELOAD
] = "reload",
1608 [JOB_RELOAD_OR_START
] = "reload-or-start",
1609 [JOB_RESTART
] = "restart",
1610 [JOB_TRY_RESTART
] = "try-restart",
1611 [JOB_TRY_RELOAD
] = "try-reload",
1615 DEFINE_STRING_TABLE_LOOKUP(job_type
, JobType
);
1617 static const char* const job_mode_table
[_JOB_MODE_MAX
] = {
1618 [JOB_FAIL
] = "fail",
1619 [JOB_REPLACE
] = "replace",
1620 [JOB_REPLACE_IRREVERSIBLY
] = "replace-irreversibly",
1621 [JOB_ISOLATE
] = "isolate",
1622 [JOB_FLUSH
] = "flush",
1623 [JOB_IGNORE_DEPENDENCIES
] = "ignore-dependencies",
1624 [JOB_IGNORE_REQUIREMENTS
] = "ignore-requirements",
1625 [JOB_TRIGGERING
] = "triggering",
1628 DEFINE_STRING_TABLE_LOOKUP(job_mode
, JobMode
);
1630 static const char* const job_result_table
[_JOB_RESULT_MAX
] = {
1631 [JOB_DONE
] = "done",
1632 [JOB_CANCELED
] = "canceled",
1633 [JOB_TIMEOUT
] = "timeout",
1634 [JOB_FAILED
] = "failed",
1635 [JOB_DEPENDENCY
] = "dependency",
1636 [JOB_SKIPPED
] = "skipped",
1637 [JOB_INVALID
] = "invalid",
1638 [JOB_ASSERT
] = "assert",
1639 [JOB_UNSUPPORTED
] = "unsupported",
1640 [JOB_COLLECTED
] = "collected",
1641 [JOB_ONCE
] = "once",
1644 DEFINE_STRING_TABLE_LOOKUP(job_result
, JobResult
);
1646 const char* job_type_to_access_method(JobType t
) {
1648 assert(t
< _JOB_TYPE_MAX
);
1650 if (IN_SET(t
, JOB_START
, JOB_RESTART
, JOB_TRY_RESTART
))
1652 else if (t
== JOB_STOP
)
1659 * assume_dep assumed dependency between units (a is before/after b)
1662 * 0 jobs are independent,
1663 * >0 a should run after b,
1664 * <0 a should run before b,
1666 * The logic means that for a service a and a service b where b.After=a:
1668 * start a + start b → 1st step start a, 2nd step start b
1669 * start a + stop b → 1st step stop b, 2nd step start a
1670 * stop a + start b → 1st step stop a, 2nd step start b
1671 * stop a + stop b → 1st step stop b, 2nd step stop a
1673 * This has the side effect that restarts are properly
1676 int job_compare(Job
*a
, Job
*b
, UnitDependency assume_dep
) {
1677 assert(a
->type
< _JOB_TYPE_MAX_IN_TRANSACTION
);
1678 assert(b
->type
< _JOB_TYPE_MAX_IN_TRANSACTION
);
1679 assert(IN_SET(assume_dep
, UNIT_AFTER
, UNIT_BEFORE
));
1681 /* Trivial cases first */
1682 if (a
->type
== JOB_NOP
|| b
->type
== JOB_NOP
)
1685 if (a
->ignore_order
|| b
->ignore_order
)
1688 if (assume_dep
== UNIT_AFTER
)
1689 return -job_compare(b
, a
, UNIT_BEFORE
);
1691 /* Let's make it simple, JOB_STOP goes always first (in case both ua and ub stop,
1692 * then ub's stop goes first anyway).
1693 * JOB_RESTART is JOB_STOP in disguise (before it is patched to JOB_START). */
1694 if (IN_SET(b
->type
, JOB_STOP
, JOB_RESTART
))