1 /* SPDX-License-Identifier: LGPL-2.1+ */
11 #include "sd-messages.h"
13 #include "all-units.h"
14 #include "alloc-util.h"
15 #include "bpf-firewall.h"
16 #include "bus-common-errors.h"
18 #include "cgroup-util.h"
19 #include "dbus-unit.h"
25 #include "fileio-label.h"
27 #include "format-util.h"
29 #include "id128-util.h"
32 #include "load-dropin.h"
33 #include "load-fragment.h"
38 #include "parse-util.h"
39 #include "path-util.h"
40 #include "process-util.h"
41 #include "serialize.h"
43 #include "signal-util.h"
44 #include "sparse-endian.h"
46 #include "specifier.h"
47 #include "stat-util.h"
48 #include "stdio-util.h"
49 #include "string-table.h"
50 #include "string-util.h"
52 #include "terminal-util.h"
53 #include "tmpfile-util.h"
54 #include "umask-util.h"
55 #include "unit-name.h"
57 #include "user-util.h"
60 /* Thresholds for logging at INFO level about resource consumption */
61 #define MENTIONWORTHY_CPU_NSEC (1 * NSEC_PER_SEC)
62 #define MENTIONWORTHY_IO_BYTES (1024 * 1024ULL)
63 #define MENTIONWORTHY_IP_BYTES (0ULL)
65 /* Thresholds for logging at INFO level about resource consumption */
66 #define NOTICEWORTHY_CPU_NSEC (10*60 * NSEC_PER_SEC) /* 10 minutes */
67 #define NOTICEWORTHY_IO_BYTES (10 * 1024 * 1024ULL) /* 10 MB */
68 #define NOTICEWORTHY_IP_BYTES (128 * 1024 * 1024ULL) /* 128 MB */
70 const UnitVTable
* const unit_vtable
[_UNIT_TYPE_MAX
] = {
71 [UNIT_SERVICE
] = &service_vtable
,
72 [UNIT_SOCKET
] = &socket_vtable
,
73 [UNIT_TARGET
] = &target_vtable
,
74 [UNIT_DEVICE
] = &device_vtable
,
75 [UNIT_MOUNT
] = &mount_vtable
,
76 [UNIT_AUTOMOUNT
] = &automount_vtable
,
77 [UNIT_SWAP
] = &swap_vtable
,
78 [UNIT_TIMER
] = &timer_vtable
,
79 [UNIT_PATH
] = &path_vtable
,
80 [UNIT_SLICE
] = &slice_vtable
,
81 [UNIT_SCOPE
] = &scope_vtable
,
84 static void maybe_warn_about_dependency(Unit
*u
, const char *other
, UnitDependency dependency
);
86 Unit
*unit_new(Manager
*m
, size_t size
) {
90 assert(size
>= sizeof(Unit
));
96 u
->names
= set_new(&string_hash_ops
);
101 u
->type
= _UNIT_TYPE_INVALID
;
102 u
->default_dependencies
= true;
103 u
->unit_file_state
= _UNIT_FILE_STATE_INVALID
;
104 u
->unit_file_preset
= -1;
105 u
->on_failure_job_mode
= JOB_REPLACE
;
106 u
->cgroup_control_inotify_wd
= -1;
107 u
->cgroup_memory_inotify_wd
= -1;
108 u
->job_timeout
= USEC_INFINITY
;
109 u
->job_running_timeout
= USEC_INFINITY
;
110 u
->ref_uid
= UID_INVALID
;
111 u
->ref_gid
= GID_INVALID
;
112 u
->cpu_usage_last
= NSEC_INFINITY
;
113 u
->cgroup_invalidated_mask
|= CGROUP_MASK_BPF_FIREWALL
;
114 u
->failure_action_exit_status
= u
->success_action_exit_status
= -1;
116 u
->ip_accounting_ingress_map_fd
= -1;
117 u
->ip_accounting_egress_map_fd
= -1;
118 u
->ipv4_allow_map_fd
= -1;
119 u
->ipv6_allow_map_fd
= -1;
120 u
->ipv4_deny_map_fd
= -1;
121 u
->ipv6_deny_map_fd
= -1;
123 u
->last_section_private
= -1;
125 RATELIMIT_INIT(u
->start_limit
, m
->default_start_limit_interval
, m
->default_start_limit_burst
);
126 RATELIMIT_INIT(u
->auto_stop_ratelimit
, 10 * USEC_PER_SEC
, 16);
128 for (CGroupIOAccountingMetric i
= 0; i
< _CGROUP_IO_ACCOUNTING_METRIC_MAX
; i
++)
129 u
->io_accounting_last
[i
] = UINT64_MAX
;
134 int unit_new_for_name(Manager
*m
, size_t size
, const char *name
, Unit
**ret
) {
135 _cleanup_(unit_freep
) Unit
*u
= NULL
;
138 u
= unit_new(m
, size
);
142 r
= unit_add_name(u
, name
);
151 bool unit_has_name(const Unit
*u
, const char *name
) {
155 return set_contains(u
->names
, (char*) name
);
158 static void unit_init(Unit
*u
) {
165 assert(u
->type
>= 0);
167 cc
= unit_get_cgroup_context(u
);
169 cgroup_context_init(cc
);
171 /* Copy in the manager defaults into the cgroup
172 * context, _before_ the rest of the settings have
173 * been initialized */
175 cc
->cpu_accounting
= u
->manager
->default_cpu_accounting
;
176 cc
->io_accounting
= u
->manager
->default_io_accounting
;
177 cc
->blockio_accounting
= u
->manager
->default_blockio_accounting
;
178 cc
->memory_accounting
= u
->manager
->default_memory_accounting
;
179 cc
->tasks_accounting
= u
->manager
->default_tasks_accounting
;
180 cc
->ip_accounting
= u
->manager
->default_ip_accounting
;
182 if (u
->type
!= UNIT_SLICE
)
183 cc
->tasks_max
= u
->manager
->default_tasks_max
;
186 ec
= unit_get_exec_context(u
);
188 exec_context_init(ec
);
190 ec
->keyring_mode
= MANAGER_IS_SYSTEM(u
->manager
) ?
191 EXEC_KEYRING_SHARED
: EXEC_KEYRING_INHERIT
;
194 kc
= unit_get_kill_context(u
);
196 kill_context_init(kc
);
198 if (UNIT_VTABLE(u
)->init
)
199 UNIT_VTABLE(u
)->init(u
);
202 int unit_add_name(Unit
*u
, const char *text
) {
203 _cleanup_free_
char *s
= NULL
, *i
= NULL
;
210 if (unit_name_is_valid(text
, UNIT_NAME_TEMPLATE
)) {
215 r
= unit_name_replace_instance(text
, u
->instance
, &s
);
224 if (set_contains(u
->names
, s
))
226 if (hashmap_contains(u
->manager
->units
, s
))
229 if (!unit_name_is_valid(s
, UNIT_NAME_PLAIN
|UNIT_NAME_INSTANCE
))
232 t
= unit_name_to_type(s
);
236 if (u
->type
!= _UNIT_TYPE_INVALID
&& t
!= u
->type
)
239 r
= unit_name_to_instance(s
, &i
);
243 if (i
&& !unit_type_may_template(t
))
246 /* Ensure that this unit is either instanced or not instanced,
247 * but not both. Note that we do allow names with different
248 * instance names however! */
249 if (u
->type
!= _UNIT_TYPE_INVALID
&& !u
->instance
!= !i
)
252 if (!unit_type_may_alias(t
) && !set_isempty(u
->names
))
255 if (hashmap_size(u
->manager
->units
) >= MANAGER_MAX_NAMES
)
258 r
= set_put(u
->names
, s
);
263 r
= hashmap_put(u
->manager
->units
, s
, u
);
265 (void) set_remove(u
->names
, s
);
269 if (u
->type
== _UNIT_TYPE_INVALID
) {
272 u
->instance
= TAKE_PTR(i
);
274 LIST_PREPEND(units_by_type
, u
->manager
->units_by_type
[t
], u
);
281 unit_add_to_dbus_queue(u
);
285 int unit_choose_id(Unit
*u
, const char *name
) {
286 _cleanup_free_
char *t
= NULL
;
293 if (unit_name_is_valid(name
, UNIT_NAME_TEMPLATE
)) {
298 r
= unit_name_replace_instance(name
, u
->instance
, &t
);
305 /* Selects one of the names of this unit as the id */
306 s
= set_get(u
->names
, (char*) name
);
310 /* Determine the new instance from the new id */
311 r
= unit_name_to_instance(s
, &i
);
320 unit_add_to_dbus_queue(u
);
325 int unit_set_description(Unit
*u
, const char *description
) {
330 r
= free_and_strdup(&u
->description
, empty_to_null(description
));
334 unit_add_to_dbus_queue(u
);
339 bool unit_may_gc(Unit
*u
) {
340 UnitActiveState state
;
345 /* Checks whether the unit is ready to be unloaded for garbage collection.
346 * Returns true when the unit may be collected, and false if there's some
347 * reason to keep it loaded.
349 * References from other units are *not* checked here. Instead, this is done
350 * in unit_gc_sweep(), but using markers to properly collect dependency loops.
359 state
= unit_active_state(u
);
361 /* If the unit is inactive and failed and no job is queued for it, then release its runtime resources */
362 if (UNIT_IS_INACTIVE_OR_FAILED(state
) &&
363 UNIT_VTABLE(u
)->release_resources
)
364 UNIT_VTABLE(u
)->release_resources(u
);
369 if (sd_bus_track_count(u
->bus_track
) > 0)
372 /* But we keep the unit object around for longer when it is referenced or configured to not be gc'ed */
373 switch (u
->collect_mode
) {
375 case COLLECT_INACTIVE
:
376 if (state
!= UNIT_INACTIVE
)
381 case COLLECT_INACTIVE_OR_FAILED
:
382 if (!IN_SET(state
, UNIT_INACTIVE
, UNIT_FAILED
))
388 assert_not_reached("Unknown garbage collection mode");
391 if (u
->cgroup_path
) {
392 /* If the unit has a cgroup, then check whether there's anything in it. If so, we should stay
393 * around. Units with active processes should never be collected. */
395 r
= cg_is_empty_recursive(SYSTEMD_CGROUP_CONTROLLER
, u
->cgroup_path
);
397 log_unit_debug_errno(u
, r
, "Failed to determine whether cgroup %s is empty: %m", u
->cgroup_path
);
402 if (UNIT_VTABLE(u
)->may_gc
&& !UNIT_VTABLE(u
)->may_gc(u
))
408 void unit_add_to_load_queue(Unit
*u
) {
410 assert(u
->type
!= _UNIT_TYPE_INVALID
);
412 if (u
->load_state
!= UNIT_STUB
|| u
->in_load_queue
)
415 LIST_PREPEND(load_queue
, u
->manager
->load_queue
, u
);
416 u
->in_load_queue
= true;
419 void unit_add_to_cleanup_queue(Unit
*u
) {
422 if (u
->in_cleanup_queue
)
425 LIST_PREPEND(cleanup_queue
, u
->manager
->cleanup_queue
, u
);
426 u
->in_cleanup_queue
= true;
429 void unit_add_to_gc_queue(Unit
*u
) {
432 if (u
->in_gc_queue
|| u
->in_cleanup_queue
)
438 LIST_PREPEND(gc_queue
, u
->manager
->gc_unit_queue
, u
);
439 u
->in_gc_queue
= true;
442 void unit_add_to_dbus_queue(Unit
*u
) {
444 assert(u
->type
!= _UNIT_TYPE_INVALID
);
446 if (u
->load_state
== UNIT_STUB
|| u
->in_dbus_queue
)
449 /* Shortcut things if nobody cares */
450 if (sd_bus_track_count(u
->manager
->subscribed
) <= 0 &&
451 sd_bus_track_count(u
->bus_track
) <= 0 &&
452 set_isempty(u
->manager
->private_buses
)) {
453 u
->sent_dbus_new_signal
= true;
457 LIST_PREPEND(dbus_queue
, u
->manager
->dbus_unit_queue
, u
);
458 u
->in_dbus_queue
= true;
461 void unit_submit_to_stop_when_unneeded_queue(Unit
*u
) {
464 if (u
->in_stop_when_unneeded_queue
)
467 if (!u
->stop_when_unneeded
)
470 if (!UNIT_IS_ACTIVE_OR_RELOADING(unit_active_state(u
)))
473 LIST_PREPEND(stop_when_unneeded_queue
, u
->manager
->stop_when_unneeded_queue
, u
);
474 u
->in_stop_when_unneeded_queue
= true;
477 static void bidi_set_free(Unit
*u
, Hashmap
*h
) {
484 /* Frees the hashmap and makes sure we are dropped from the inverse pointers */
486 HASHMAP_FOREACH_KEY(v
, other
, h
, i
) {
489 for (d
= 0; d
< _UNIT_DEPENDENCY_MAX
; d
++)
490 hashmap_remove(other
->dependencies
[d
], u
);
492 unit_add_to_gc_queue(other
);
498 static void unit_remove_transient(Unit
*u
) {
506 if (u
->fragment_path
)
507 (void) unlink(u
->fragment_path
);
509 STRV_FOREACH(i
, u
->dropin_paths
) {
510 _cleanup_free_
char *p
= NULL
, *pp
= NULL
;
512 p
= dirname_malloc(*i
); /* Get the drop-in directory from the drop-in file */
516 pp
= dirname_malloc(p
); /* Get the config directory from the drop-in directory */
520 /* Only drop transient drop-ins */
521 if (!path_equal(u
->manager
->lookup_paths
.transient
, pp
))
529 static void unit_free_requires_mounts_for(Unit
*u
) {
533 _cleanup_free_
char *path
;
535 path
= hashmap_steal_first_key(u
->requires_mounts_for
);
539 char s
[strlen(path
) + 1];
541 PATH_FOREACH_PREFIX_MORE(s
, path
) {
545 x
= hashmap_get2(u
->manager
->units_requiring_mounts_for
, s
, (void**) &y
);
549 (void) set_remove(x
, u
);
551 if (set_isempty(x
)) {
552 (void) hashmap_remove(u
->manager
->units_requiring_mounts_for
, y
);
560 u
->requires_mounts_for
= hashmap_free(u
->requires_mounts_for
);
563 static void unit_done(Unit
*u
) {
572 if (UNIT_VTABLE(u
)->done
)
573 UNIT_VTABLE(u
)->done(u
);
575 ec
= unit_get_exec_context(u
);
577 exec_context_done(ec
);
579 cc
= unit_get_cgroup_context(u
);
581 cgroup_context_done(cc
);
584 void unit_free(Unit
*u
) {
592 if (UNIT_ISSET(u
->slice
)) {
593 /* A unit is being dropped from the tree, make sure our parent slice recalculates the member mask */
594 unit_invalidate_cgroup_members_masks(UNIT_DEREF(u
->slice
));
596 /* And make sure the parent is realized again, updating cgroup memberships */
597 unit_add_to_cgroup_realize_queue(UNIT_DEREF(u
->slice
));
600 u
->transient_file
= safe_fclose(u
->transient_file
);
602 if (!MANAGER_IS_RELOADING(u
->manager
))
603 unit_remove_transient(u
);
605 bus_unit_send_removed_signal(u
);
609 unit_dequeue_rewatch_pids(u
);
611 sd_bus_slot_unref(u
->match_bus_slot
);
612 sd_bus_track_unref(u
->bus_track
);
613 u
->deserialized_refs
= strv_free(u
->deserialized_refs
);
615 unit_free_requires_mounts_for(u
);
617 SET_FOREACH(t
, u
->names
, i
)
618 hashmap_remove_value(u
->manager
->units
, t
, u
);
620 if (!sd_id128_is_null(u
->invocation_id
))
621 hashmap_remove_value(u
->manager
->units_by_invocation_id
, &u
->invocation_id
, u
);
635 for (d
= 0; d
< _UNIT_DEPENDENCY_MAX
; d
++)
636 bidi_set_free(u
, u
->dependencies
[d
]);
639 manager_unref_console(u
->manager
);
641 unit_release_cgroup(u
);
643 if (!MANAGER_IS_RELOADING(u
->manager
))
644 unit_unlink_state_files(u
);
646 unit_unref_uid_gid(u
, false);
648 (void) manager_update_failed_units(u
->manager
, u
, false);
649 set_remove(u
->manager
->startup_units
, u
);
651 unit_unwatch_all_pids(u
);
653 unit_ref_unset(&u
->slice
);
654 while (u
->refs_by_target
)
655 unit_ref_unset(u
->refs_by_target
);
657 if (u
->type
!= _UNIT_TYPE_INVALID
)
658 LIST_REMOVE(units_by_type
, u
->manager
->units_by_type
[u
->type
], u
);
660 if (u
->in_load_queue
)
661 LIST_REMOVE(load_queue
, u
->manager
->load_queue
, u
);
663 if (u
->in_dbus_queue
)
664 LIST_REMOVE(dbus_queue
, u
->manager
->dbus_unit_queue
, u
);
667 LIST_REMOVE(gc_queue
, u
->manager
->gc_unit_queue
, u
);
669 if (u
->in_cgroup_realize_queue
)
670 LIST_REMOVE(cgroup_realize_queue
, u
->manager
->cgroup_realize_queue
, u
);
672 if (u
->in_cgroup_empty_queue
)
673 LIST_REMOVE(cgroup_empty_queue
, u
->manager
->cgroup_empty_queue
, u
);
675 if (u
->in_cleanup_queue
)
676 LIST_REMOVE(cleanup_queue
, u
->manager
->cleanup_queue
, u
);
678 if (u
->in_target_deps_queue
)
679 LIST_REMOVE(target_deps_queue
, u
->manager
->target_deps_queue
, u
);
681 if (u
->in_stop_when_unneeded_queue
)
682 LIST_REMOVE(stop_when_unneeded_queue
, u
->manager
->stop_when_unneeded_queue
, u
);
684 safe_close(u
->ip_accounting_ingress_map_fd
);
685 safe_close(u
->ip_accounting_egress_map_fd
);
687 safe_close(u
->ipv4_allow_map_fd
);
688 safe_close(u
->ipv6_allow_map_fd
);
689 safe_close(u
->ipv4_deny_map_fd
);
690 safe_close(u
->ipv6_deny_map_fd
);
692 bpf_program_unref(u
->ip_bpf_ingress
);
693 bpf_program_unref(u
->ip_bpf_ingress_installed
);
694 bpf_program_unref(u
->ip_bpf_egress
);
695 bpf_program_unref(u
->ip_bpf_egress_installed
);
697 set_free(u
->ip_bpf_custom_ingress
);
698 set_free(u
->ip_bpf_custom_egress
);
699 set_free(u
->ip_bpf_custom_ingress_installed
);
700 set_free(u
->ip_bpf_custom_egress_installed
);
702 bpf_program_unref(u
->bpf_device_control_installed
);
704 condition_free_list(u
->conditions
);
705 condition_free_list(u
->asserts
);
707 free(u
->description
);
708 strv_free(u
->documentation
);
709 free(u
->fragment_path
);
710 free(u
->source_path
);
711 strv_free(u
->dropin_paths
);
714 free(u
->job_timeout_reboot_arg
);
716 set_free_free(u
->names
);
723 UnitActiveState
unit_active_state(Unit
*u
) {
726 if (u
->load_state
== UNIT_MERGED
)
727 return unit_active_state(unit_follow_merge(u
));
729 /* After a reload it might happen that a unit is not correctly
730 * loaded but still has a process around. That's why we won't
731 * shortcut failed loading to UNIT_INACTIVE_FAILED. */
733 return UNIT_VTABLE(u
)->active_state(u
);
736 const char* unit_sub_state_to_string(Unit
*u
) {
739 return UNIT_VTABLE(u
)->sub_state_to_string(u
);
742 static int set_complete_move(Set
**s
, Set
**other
) {
750 return set_move(*s
, *other
);
752 *s
= TAKE_PTR(*other
);
757 static int hashmap_complete_move(Hashmap
**s
, Hashmap
**other
) {
765 return hashmap_move(*s
, *other
);
767 *s
= TAKE_PTR(*other
);
772 static int merge_names(Unit
*u
, Unit
*other
) {
780 r
= set_complete_move(&u
->names
, &other
->names
);
784 set_free_free(other
->names
);
788 SET_FOREACH(t
, u
->names
, i
)
789 assert_se(hashmap_replace(u
->manager
->units
, t
, u
) == 0);
794 static int reserve_dependencies(Unit
*u
, Unit
*other
, UnitDependency d
) {
799 assert(d
< _UNIT_DEPENDENCY_MAX
);
802 * If u does not have this dependency set allocated, there is no need
803 * to reserve anything. In that case other's set will be transferred
804 * as a whole to u by complete_move().
806 if (!u
->dependencies
[d
])
809 /* merge_dependencies() will skip a u-on-u dependency */
810 n_reserve
= hashmap_size(other
->dependencies
[d
]) - !!hashmap_get(other
->dependencies
[d
], u
);
812 return hashmap_reserve(u
->dependencies
[d
], n_reserve
);
815 static void merge_dependencies(Unit
*u
, Unit
*other
, const char *other_id
, UnitDependency d
) {
821 /* Merges all dependencies of type 'd' of the unit 'other' into the deps of the unit 'u' */
825 assert(d
< _UNIT_DEPENDENCY_MAX
);
827 /* Fix backwards pointers. Let's iterate through all dependent units of the other unit. */
828 HASHMAP_FOREACH_KEY(v
, back
, other
->dependencies
[d
], i
) {
831 /* Let's now iterate through the dependencies of that dependencies of the other units, looking for
832 * pointers back, and let's fix them up, to instead point to 'u'. */
834 for (k
= 0; k
< _UNIT_DEPENDENCY_MAX
; k
++) {
836 /* Do not add dependencies between u and itself. */
837 if (hashmap_remove(back
->dependencies
[k
], other
))
838 maybe_warn_about_dependency(u
, other_id
, k
);
840 UnitDependencyInfo di_u
, di_other
, di_merged
;
842 /* Let's drop this dependency between "back" and "other", and let's create it between
843 * "back" and "u" instead. Let's merge the bit masks of the dependency we are moving,
844 * and any such dependency which might already exist */
846 di_other
.data
= hashmap_get(back
->dependencies
[k
], other
);
848 continue; /* dependency isn't set, let's try the next one */
850 di_u
.data
= hashmap_get(back
->dependencies
[k
], u
);
852 di_merged
= (UnitDependencyInfo
) {
853 .origin_mask
= di_u
.origin_mask
| di_other
.origin_mask
,
854 .destination_mask
= di_u
.destination_mask
| di_other
.destination_mask
,
857 r
= hashmap_remove_and_replace(back
->dependencies
[k
], other
, u
, di_merged
.data
);
859 log_warning_errno(r
, "Failed to remove/replace: back=%s other=%s u=%s: %m", back
->id
, other_id
, u
->id
);
862 /* assert_se(hashmap_remove_and_replace(back->dependencies[k], other, u, di_merged.data) >= 0); */
868 /* Also do not move dependencies on u to itself */
869 back
= hashmap_remove(other
->dependencies
[d
], u
);
871 maybe_warn_about_dependency(u
, other_id
, d
);
873 /* The move cannot fail. The caller must have performed a reservation. */
874 assert_se(hashmap_complete_move(&u
->dependencies
[d
], &other
->dependencies
[d
]) == 0);
876 other
->dependencies
[d
] = hashmap_free(other
->dependencies
[d
]);
879 int unit_merge(Unit
*u
, Unit
*other
) {
881 const char *other_id
= NULL
;
886 assert(u
->manager
== other
->manager
);
887 assert(u
->type
!= _UNIT_TYPE_INVALID
);
889 other
= unit_follow_merge(other
);
894 if (u
->type
!= other
->type
)
897 if (!u
->instance
!= !other
->instance
)
900 if (!unit_type_may_alias(u
->type
)) /* Merging only applies to unit names that support aliases */
903 if (!IN_SET(other
->load_state
, UNIT_STUB
, UNIT_NOT_FOUND
))
912 if (!UNIT_IS_INACTIVE_OR_FAILED(unit_active_state(other
)))
916 other_id
= strdupa(other
->id
);
918 /* Make reservations to ensure merge_dependencies() won't fail */
919 for (d
= 0; d
< _UNIT_DEPENDENCY_MAX
; d
++) {
920 r
= reserve_dependencies(u
, other
, d
);
922 * We don't rollback reservations if we fail. We don't have
923 * a way to undo reservations. A reservation is not a leak.
930 r
= merge_names(u
, other
);
934 /* Redirect all references */
935 while (other
->refs_by_target
)
936 unit_ref_set(other
->refs_by_target
, other
->refs_by_target
->source
, u
);
938 /* Merge dependencies */
939 for (d
= 0; d
< _UNIT_DEPENDENCY_MAX
; d
++)
940 merge_dependencies(u
, other
, other_id
, d
);
942 other
->load_state
= UNIT_MERGED
;
943 other
->merged_into
= u
;
945 /* If there is still some data attached to the other node, we
946 * don't need it anymore, and can free it. */
947 if (other
->load_state
!= UNIT_STUB
)
948 if (UNIT_VTABLE(other
)->done
)
949 UNIT_VTABLE(other
)->done(other
);
951 unit_add_to_dbus_queue(u
);
952 unit_add_to_cleanup_queue(other
);
957 int unit_merge_by_name(Unit
*u
, const char *name
) {
958 _cleanup_free_
char *s
= NULL
;
962 /* Either add name to u, or if a unit with name already exists, merge it with u.
963 * If name is a template, do the same for name@instance, where instance is u's instance. */
968 if (unit_name_is_valid(name
, UNIT_NAME_TEMPLATE
)) {
972 r
= unit_name_replace_instance(name
, u
->instance
, &s
);
979 other
= manager_get_unit(u
->manager
, name
);
981 return unit_merge(u
, other
);
983 return unit_add_name(u
, name
);
986 Unit
* unit_follow_merge(Unit
*u
) {
989 while (u
->load_state
== UNIT_MERGED
)
990 assert_se(u
= u
->merged_into
);
995 int unit_add_exec_dependencies(Unit
*u
, ExecContext
*c
) {
996 ExecDirectoryType dt
;
1003 if (c
->working_directory
&& !c
->working_directory_missing_ok
) {
1004 r
= unit_require_mounts_for(u
, c
->working_directory
, UNIT_DEPENDENCY_FILE
);
1009 if (c
->root_directory
) {
1010 r
= unit_require_mounts_for(u
, c
->root_directory
, UNIT_DEPENDENCY_FILE
);
1015 if (c
->root_image
) {
1016 r
= unit_require_mounts_for(u
, c
->root_image
, UNIT_DEPENDENCY_FILE
);
1021 for (dt
= 0; dt
< _EXEC_DIRECTORY_TYPE_MAX
; dt
++) {
1022 if (!u
->manager
->prefix
[dt
])
1025 STRV_FOREACH(dp
, c
->directories
[dt
].paths
) {
1026 _cleanup_free_
char *p
;
1028 p
= path_join(u
->manager
->prefix
[dt
], *dp
);
1032 r
= unit_require_mounts_for(u
, p
, UNIT_DEPENDENCY_FILE
);
1038 if (!MANAGER_IS_SYSTEM(u
->manager
))
1041 if (c
->private_tmp
) {
1044 FOREACH_STRING(p
, "/tmp", "/var/tmp") {
1045 r
= unit_require_mounts_for(u
, p
, UNIT_DEPENDENCY_FILE
);
1050 r
= unit_add_dependency_by_name(u
, UNIT_AFTER
, SPECIAL_TMPFILES_SETUP_SERVICE
, true, UNIT_DEPENDENCY_FILE
);
1055 if (!IN_SET(c
->std_output
,
1056 EXEC_OUTPUT_JOURNAL
, EXEC_OUTPUT_JOURNAL_AND_CONSOLE
,
1057 EXEC_OUTPUT_KMSG
, EXEC_OUTPUT_KMSG_AND_CONSOLE
,
1058 EXEC_OUTPUT_SYSLOG
, EXEC_OUTPUT_SYSLOG_AND_CONSOLE
) &&
1059 !IN_SET(c
->std_error
,
1060 EXEC_OUTPUT_JOURNAL
, EXEC_OUTPUT_JOURNAL_AND_CONSOLE
,
1061 EXEC_OUTPUT_KMSG
, EXEC_OUTPUT_KMSG_AND_CONSOLE
,
1062 EXEC_OUTPUT_SYSLOG
, EXEC_OUTPUT_SYSLOG_AND_CONSOLE
))
1065 /* If syslog or kernel logging is requested, make sure our own
1066 * logging daemon is run first. */
1068 r
= unit_add_dependency_by_name(u
, UNIT_AFTER
, SPECIAL_JOURNALD_SOCKET
, true, UNIT_DEPENDENCY_FILE
);
1075 const char *unit_description(Unit
*u
) {
1079 return u
->description
;
1081 return strna(u
->id
);
1084 const char *unit_status_string(Unit
*u
) {
1087 if (u
->manager
->status_unit_format
== STATUS_UNIT_FORMAT_NAME
&& u
->id
)
1090 return unit_description(u
);
1093 static void print_unit_dependency_mask(FILE *f
, const char *kind
, UnitDependencyMask mask
, bool *space
) {
1095 UnitDependencyMask mask
;
1098 { UNIT_DEPENDENCY_FILE
, "file" },
1099 { UNIT_DEPENDENCY_IMPLICIT
, "implicit" },
1100 { UNIT_DEPENDENCY_DEFAULT
, "default" },
1101 { UNIT_DEPENDENCY_UDEV
, "udev" },
1102 { UNIT_DEPENDENCY_PATH
, "path" },
1103 { UNIT_DEPENDENCY_MOUNTINFO_IMPLICIT
, "mountinfo-implicit" },
1104 { UNIT_DEPENDENCY_MOUNTINFO_DEFAULT
, "mountinfo-default" },
1105 { UNIT_DEPENDENCY_PROC_SWAP
, "proc-swap" },
1113 for (i
= 0; i
< ELEMENTSOF(table
); i
++) {
1118 if (FLAGS_SET(mask
, table
[i
].mask
)) {
1126 fputs(table
[i
].name
, f
);
1128 mask
&= ~table
[i
].mask
;
1135 void unit_dump(Unit
*u
, FILE *f
, const char *prefix
) {
1139 const char *prefix2
;
1140 char timestamp
[5][FORMAT_TIMESTAMP_MAX
], timespan
[FORMAT_TIMESPAN_MAX
];
1142 _cleanup_set_free_ Set
*following_set
= NULL
;
1148 assert(u
->type
>= 0);
1150 prefix
= strempty(prefix
);
1151 prefix2
= strjoina(prefix
, "\t");
1157 SET_FOREACH(t
, u
->names
, i
)
1158 if (!streq(t
, u
->id
))
1159 fprintf(f
, "%s\tAlias: %s\n", prefix
, t
);
1162 "%s\tDescription: %s\n"
1163 "%s\tInstance: %s\n"
1164 "%s\tUnit Load State: %s\n"
1165 "%s\tUnit Active State: %s\n"
1166 "%s\tState Change Timestamp: %s\n"
1167 "%s\tInactive Exit Timestamp: %s\n"
1168 "%s\tActive Enter Timestamp: %s\n"
1169 "%s\tActive Exit Timestamp: %s\n"
1170 "%s\tInactive Enter Timestamp: %s\n"
1172 "%s\tNeed Daemon Reload: %s\n"
1173 "%s\tTransient: %s\n"
1174 "%s\tPerpetual: %s\n"
1175 "%s\tGarbage Collection Mode: %s\n"
1178 "%s\tCGroup realized: %s\n",
1179 prefix
, unit_description(u
),
1180 prefix
, strna(u
->instance
),
1181 prefix
, unit_load_state_to_string(u
->load_state
),
1182 prefix
, unit_active_state_to_string(unit_active_state(u
)),
1183 prefix
, strna(format_timestamp(timestamp
[0], sizeof(timestamp
[0]), u
->state_change_timestamp
.realtime
)),
1184 prefix
, strna(format_timestamp(timestamp
[1], sizeof(timestamp
[1]), u
->inactive_exit_timestamp
.realtime
)),
1185 prefix
, strna(format_timestamp(timestamp
[2], sizeof(timestamp
[2]), u
->active_enter_timestamp
.realtime
)),
1186 prefix
, strna(format_timestamp(timestamp
[3], sizeof(timestamp
[3]), u
->active_exit_timestamp
.realtime
)),
1187 prefix
, strna(format_timestamp(timestamp
[4], sizeof(timestamp
[4]), u
->inactive_enter_timestamp
.realtime
)),
1188 prefix
, yes_no(unit_may_gc(u
)),
1189 prefix
, yes_no(unit_need_daemon_reload(u
)),
1190 prefix
, yes_no(u
->transient
),
1191 prefix
, yes_no(u
->perpetual
),
1192 prefix
, collect_mode_to_string(u
->collect_mode
),
1193 prefix
, strna(unit_slice_name(u
)),
1194 prefix
, strna(u
->cgroup_path
),
1195 prefix
, yes_no(u
->cgroup_realized
));
1197 if (u
->cgroup_realized_mask
!= 0) {
1198 _cleanup_free_
char *s
= NULL
;
1199 (void) cg_mask_to_string(u
->cgroup_realized_mask
, &s
);
1200 fprintf(f
, "%s\tCGroup realized mask: %s\n", prefix
, strnull(s
));
1203 if (u
->cgroup_enabled_mask
!= 0) {
1204 _cleanup_free_
char *s
= NULL
;
1205 (void) cg_mask_to_string(u
->cgroup_enabled_mask
, &s
);
1206 fprintf(f
, "%s\tCGroup enabled mask: %s\n", prefix
, strnull(s
));
1209 m
= unit_get_own_mask(u
);
1211 _cleanup_free_
char *s
= NULL
;
1212 (void) cg_mask_to_string(m
, &s
);
1213 fprintf(f
, "%s\tCGroup own mask: %s\n", prefix
, strnull(s
));
1216 m
= unit_get_members_mask(u
);
1218 _cleanup_free_
char *s
= NULL
;
1219 (void) cg_mask_to_string(m
, &s
);
1220 fprintf(f
, "%s\tCGroup members mask: %s\n", prefix
, strnull(s
));
1223 m
= unit_get_delegate_mask(u
);
1225 _cleanup_free_
char *s
= NULL
;
1226 (void) cg_mask_to_string(m
, &s
);
1227 fprintf(f
, "%s\tCGroup delegate mask: %s\n", prefix
, strnull(s
));
1230 if (!sd_id128_is_null(u
->invocation_id
))
1231 fprintf(f
, "%s\tInvocation ID: " SD_ID128_FORMAT_STR
"\n",
1232 prefix
, SD_ID128_FORMAT_VAL(u
->invocation_id
));
1234 STRV_FOREACH(j
, u
->documentation
)
1235 fprintf(f
, "%s\tDocumentation: %s\n", prefix
, *j
);
1237 following
= unit_following(u
);
1239 fprintf(f
, "%s\tFollowing: %s\n", prefix
, following
->id
);
1241 r
= unit_following_set(u
, &following_set
);
1245 SET_FOREACH(other
, following_set
, i
)
1246 fprintf(f
, "%s\tFollowing Set Member: %s\n", prefix
, other
->id
);
1249 if (u
->fragment_path
)
1250 fprintf(f
, "%s\tFragment Path: %s\n", prefix
, u
->fragment_path
);
1253 fprintf(f
, "%s\tSource Path: %s\n", prefix
, u
->source_path
);
1255 STRV_FOREACH(j
, u
->dropin_paths
)
1256 fprintf(f
, "%s\tDropIn Path: %s\n", prefix
, *j
);
1258 if (u
->failure_action
!= EMERGENCY_ACTION_NONE
)
1259 fprintf(f
, "%s\tFailure Action: %s\n", prefix
, emergency_action_to_string(u
->failure_action
));
1260 if (u
->failure_action_exit_status
>= 0)
1261 fprintf(f
, "%s\tFailure Action Exit Status: %i\n", prefix
, u
->failure_action_exit_status
);
1262 if (u
->success_action
!= EMERGENCY_ACTION_NONE
)
1263 fprintf(f
, "%s\tSuccess Action: %s\n", prefix
, emergency_action_to_string(u
->success_action
));
1264 if (u
->success_action_exit_status
>= 0)
1265 fprintf(f
, "%s\tSuccess Action Exit Status: %i\n", prefix
, u
->success_action_exit_status
);
1267 if (u
->job_timeout
!= USEC_INFINITY
)
1268 fprintf(f
, "%s\tJob Timeout: %s\n", prefix
, format_timespan(timespan
, sizeof(timespan
), u
->job_timeout
, 0));
1270 if (u
->job_timeout_action
!= EMERGENCY_ACTION_NONE
)
1271 fprintf(f
, "%s\tJob Timeout Action: %s\n", prefix
, emergency_action_to_string(u
->job_timeout_action
));
1273 if (u
->job_timeout_reboot_arg
)
1274 fprintf(f
, "%s\tJob Timeout Reboot Argument: %s\n", prefix
, u
->job_timeout_reboot_arg
);
1276 condition_dump_list(u
->conditions
, f
, prefix
, condition_type_to_string
);
1277 condition_dump_list(u
->asserts
, f
, prefix
, assert_type_to_string
);
1279 if (dual_timestamp_is_set(&u
->condition_timestamp
))
1281 "%s\tCondition Timestamp: %s\n"
1282 "%s\tCondition Result: %s\n",
1283 prefix
, strna(format_timestamp(timestamp
[0], sizeof(timestamp
[0]), u
->condition_timestamp
.realtime
)),
1284 prefix
, yes_no(u
->condition_result
));
1286 if (dual_timestamp_is_set(&u
->assert_timestamp
))
1288 "%s\tAssert Timestamp: %s\n"
1289 "%s\tAssert Result: %s\n",
1290 prefix
, strna(format_timestamp(timestamp
[0], sizeof(timestamp
[0]), u
->assert_timestamp
.realtime
)),
1291 prefix
, yes_no(u
->assert_result
));
1293 for (d
= 0; d
< _UNIT_DEPENDENCY_MAX
; d
++) {
1294 UnitDependencyInfo di
;
1297 HASHMAP_FOREACH_KEY(di
.data
, other
, u
->dependencies
[d
], i
) {
1300 fprintf(f
, "%s\t%s: %s (", prefix
, unit_dependency_to_string(d
), other
->id
);
1302 print_unit_dependency_mask(f
, "origin", di
.origin_mask
, &space
);
1303 print_unit_dependency_mask(f
, "destination", di
.destination_mask
, &space
);
1309 if (!hashmap_isempty(u
->requires_mounts_for
)) {
1310 UnitDependencyInfo di
;
1313 HASHMAP_FOREACH_KEY(di
.data
, path
, u
->requires_mounts_for
, i
) {
1316 fprintf(f
, "%s\tRequiresMountsFor: %s (", prefix
, path
);
1318 print_unit_dependency_mask(f
, "origin", di
.origin_mask
, &space
);
1319 print_unit_dependency_mask(f
, "destination", di
.destination_mask
, &space
);
1325 if (u
->load_state
== UNIT_LOADED
) {
1328 "%s\tStopWhenUnneeded: %s\n"
1329 "%s\tRefuseManualStart: %s\n"
1330 "%s\tRefuseManualStop: %s\n"
1331 "%s\tDefaultDependencies: %s\n"
1332 "%s\tOnFailureJobMode: %s\n"
1333 "%s\tIgnoreOnIsolate: %s\n",
1334 prefix
, yes_no(u
->stop_when_unneeded
),
1335 prefix
, yes_no(u
->refuse_manual_start
),
1336 prefix
, yes_no(u
->refuse_manual_stop
),
1337 prefix
, yes_no(u
->default_dependencies
),
1338 prefix
, job_mode_to_string(u
->on_failure_job_mode
),
1339 prefix
, yes_no(u
->ignore_on_isolate
));
1341 if (UNIT_VTABLE(u
)->dump
)
1342 UNIT_VTABLE(u
)->dump(u
, f
, prefix2
);
1344 } else if (u
->load_state
== UNIT_MERGED
)
1346 "%s\tMerged into: %s\n",
1347 prefix
, u
->merged_into
->id
);
1348 else if (u
->load_state
== UNIT_ERROR
)
1349 fprintf(f
, "%s\tLoad Error Code: %s\n", prefix
, strerror_safe(u
->load_error
));
1351 for (n
= sd_bus_track_first(u
->bus_track
); n
; n
= sd_bus_track_next(u
->bus_track
))
1352 fprintf(f
, "%s\tBus Ref: %s\n", prefix
, n
);
1355 job_dump(u
->job
, f
, prefix2
);
1358 job_dump(u
->nop_job
, f
, prefix2
);
1361 /* Common implementation for multiple backends */
1362 int unit_load_fragment_and_dropin(Unit
*u
) {
1367 /* Load a .{service,socket,...} file */
1368 r
= unit_load_fragment(u
);
1372 if (u
->load_state
== UNIT_STUB
)
1375 /* Load drop-in directory data. If u is an alias, we might be reloading the
1376 * target unit needlessly. But we cannot be sure which drops-ins have already
1377 * been loaded and which not, at least without doing complicated book-keeping,
1378 * so let's always reread all drop-ins. */
1379 return unit_load_dropin(unit_follow_merge(u
));
1382 /* Common implementation for multiple backends */
1383 int unit_load_fragment_and_dropin_optional(Unit
*u
) {
1388 /* Same as unit_load_fragment_and_dropin(), but whether
1389 * something can be loaded or not doesn't matter. */
1391 /* Load a .service/.socket/.slice/… file */
1392 r
= unit_load_fragment(u
);
1396 if (u
->load_state
== UNIT_STUB
)
1397 u
->load_state
= UNIT_LOADED
;
1399 /* Load drop-in directory data */
1400 return unit_load_dropin(unit_follow_merge(u
));
1403 void unit_add_to_target_deps_queue(Unit
*u
) {
1404 Manager
*m
= u
->manager
;
1408 if (u
->in_target_deps_queue
)
1411 LIST_PREPEND(target_deps_queue
, m
->target_deps_queue
, u
);
1412 u
->in_target_deps_queue
= true;
1415 int unit_add_default_target_dependency(Unit
*u
, Unit
*target
) {
1419 if (target
->type
!= UNIT_TARGET
)
1422 /* Only add the dependency if both units are loaded, so that
1423 * that loop check below is reliable */
1424 if (u
->load_state
!= UNIT_LOADED
||
1425 target
->load_state
!= UNIT_LOADED
)
1428 /* If either side wants no automatic dependencies, then let's
1430 if (!u
->default_dependencies
||
1431 !target
->default_dependencies
)
1434 /* Don't create loops */
1435 if (hashmap_get(target
->dependencies
[UNIT_BEFORE
], u
))
1438 return unit_add_dependency(target
, UNIT_AFTER
, u
, true, UNIT_DEPENDENCY_DEFAULT
);
1441 static int unit_add_slice_dependencies(Unit
*u
) {
1442 UnitDependencyMask mask
;
1445 if (!UNIT_HAS_CGROUP_CONTEXT(u
))
1448 /* Slice units are implicitly ordered against their parent slices (as this relationship is encoded in the
1449 name), while all other units are ordered based on configuration (as in their case Slice= configures the
1451 mask
= u
->type
== UNIT_SLICE
? UNIT_DEPENDENCY_IMPLICIT
: UNIT_DEPENDENCY_FILE
;
1453 if (UNIT_ISSET(u
->slice
))
1454 return unit_add_two_dependencies(u
, UNIT_AFTER
, UNIT_REQUIRES
, UNIT_DEREF(u
->slice
), true, mask
);
1456 if (unit_has_name(u
, SPECIAL_ROOT_SLICE
))
1459 return unit_add_two_dependencies_by_name(u
, UNIT_AFTER
, UNIT_REQUIRES
, SPECIAL_ROOT_SLICE
, true, mask
);
1462 static int unit_add_mount_dependencies(Unit
*u
) {
1463 UnitDependencyInfo di
;
1470 HASHMAP_FOREACH_KEY(di
.data
, path
, u
->requires_mounts_for
, i
) {
1471 char prefix
[strlen(path
) + 1];
1473 PATH_FOREACH_PREFIX_MORE(prefix
, path
) {
1474 _cleanup_free_
char *p
= NULL
;
1477 r
= unit_name_from_path(prefix
, ".mount", &p
);
1481 m
= manager_get_unit(u
->manager
, p
);
1483 /* Make sure to load the mount unit if
1484 * it exists. If so the dependencies
1485 * on this unit will be added later
1486 * during the loading of the mount
1488 (void) manager_load_unit_prepare(u
->manager
, p
, NULL
, NULL
, &m
);
1494 if (m
->load_state
!= UNIT_LOADED
)
1497 r
= unit_add_dependency(u
, UNIT_AFTER
, m
, true, di
.origin_mask
);
1501 if (m
->fragment_path
) {
1502 r
= unit_add_dependency(u
, UNIT_REQUIRES
, m
, true, di
.origin_mask
);
1512 static int unit_add_startup_units(Unit
*u
) {
1516 c
= unit_get_cgroup_context(u
);
1520 if (c
->startup_cpu_shares
== CGROUP_CPU_SHARES_INVALID
&&
1521 c
->startup_io_weight
== CGROUP_WEIGHT_INVALID
&&
1522 c
->startup_blockio_weight
== CGROUP_BLKIO_WEIGHT_INVALID
)
1525 r
= set_ensure_allocated(&u
->manager
->startup_units
, NULL
);
1529 return set_put(u
->manager
->startup_units
, u
);
1532 int unit_load(Unit
*u
) {
1537 if (u
->in_load_queue
) {
1538 LIST_REMOVE(load_queue
, u
->manager
->load_queue
, u
);
1539 u
->in_load_queue
= false;
1542 if (u
->type
== _UNIT_TYPE_INVALID
)
1545 if (u
->load_state
!= UNIT_STUB
)
1548 if (u
->transient_file
) {
1549 /* Finalize transient file: if this is a transient unit file, as soon as we reach unit_load() the setup
1550 * is complete, hence let's synchronize the unit file we just wrote to disk. */
1552 r
= fflush_and_check(u
->transient_file
);
1556 u
->transient_file
= safe_fclose(u
->transient_file
);
1557 u
->fragment_mtime
= now(CLOCK_REALTIME
);
1560 if (UNIT_VTABLE(u
)->load
) {
1561 r
= UNIT_VTABLE(u
)->load(u
);
1566 if (u
->load_state
== UNIT_STUB
) {
1571 if (u
->load_state
== UNIT_LOADED
) {
1572 unit_add_to_target_deps_queue(u
);
1574 r
= unit_add_slice_dependencies(u
);
1578 r
= unit_add_mount_dependencies(u
);
1582 r
= unit_add_startup_units(u
);
1586 if (u
->on_failure_job_mode
== JOB_ISOLATE
&& hashmap_size(u
->dependencies
[UNIT_ON_FAILURE
]) > 1) {
1587 log_unit_error(u
, "More than one OnFailure= dependencies specified but OnFailureJobMode=isolate set. Refusing.");
1592 if (u
->job_running_timeout
!= USEC_INFINITY
&& u
->job_running_timeout
> u
->job_timeout
)
1593 log_unit_warning(u
, "JobRunningTimeoutSec= is greater than JobTimeoutSec=, it has no effect.");
1595 /* We finished loading, let's ensure our parents recalculate the members mask */
1596 unit_invalidate_cgroup_members_masks(u
);
1599 assert((u
->load_state
!= UNIT_MERGED
) == !u
->merged_into
);
1601 unit_add_to_dbus_queue(unit_follow_merge(u
));
1602 unit_add_to_gc_queue(u
);
1607 /* We convert ENOEXEC errors to the UNIT_BAD_SETTING load state here. Configuration parsing code should hence
1608 * return ENOEXEC to ensure units are placed in this state after loading */
1610 u
->load_state
= u
->load_state
== UNIT_STUB
? UNIT_NOT_FOUND
:
1611 r
== -ENOEXEC
? UNIT_BAD_SETTING
:
1615 unit_add_to_dbus_queue(u
);
1616 unit_add_to_gc_queue(u
);
1618 return log_unit_debug_errno(u
, r
, "Failed to load configuration: %m");
1622 static int log_unit_internal(void *userdata
, int level
, int error
, const char *file
, int line
, const char *func
, const char *format
, ...) {
1627 va_start(ap
, format
);
1629 r
= log_object_internalv(level
, error
, file
, line
, func
,
1630 u
->manager
->unit_log_field
,
1632 u
->manager
->invocation_log_field
,
1633 u
->invocation_id_string
,
1636 r
= log_internalv(level
, error
, file
, line
, func
, format
, ap
);
1642 static bool unit_test_condition(Unit
*u
) {
1645 dual_timestamp_get(&u
->condition_timestamp
);
1646 u
->condition_result
= condition_test_list(u
->conditions
, condition_type_to_string
, log_unit_internal
, u
);
1648 unit_add_to_dbus_queue(u
);
1650 return u
->condition_result
;
1653 static bool unit_test_assert(Unit
*u
) {
1656 dual_timestamp_get(&u
->assert_timestamp
);
1657 u
->assert_result
= condition_test_list(u
->asserts
, assert_type_to_string
, log_unit_internal
, u
);
1659 unit_add_to_dbus_queue(u
);
1661 return u
->assert_result
;
1664 void unit_status_printf(Unit
*u
, const char *status
, const char *unit_status_msg_format
) {
1667 d
= unit_status_string(u
);
1668 if (log_get_show_color())
1669 d
= strjoina(ANSI_HIGHLIGHT
, d
, ANSI_NORMAL
);
1671 DISABLE_WARNING_FORMAT_NONLITERAL
;
1672 manager_status_printf(u
->manager
, STATUS_TYPE_NORMAL
, status
, unit_status_msg_format
, d
);
1676 int unit_test_start_limit(Unit
*u
) {
1681 if (ratelimit_below(&u
->start_limit
)) {
1682 u
->start_limit_hit
= false;
1686 log_unit_warning(u
, "Start request repeated too quickly.");
1687 u
->start_limit_hit
= true;
1689 reason
= strjoina("unit ", u
->id
, " failed");
1691 emergency_action(u
->manager
, u
->start_limit_action
,
1692 EMERGENCY_ACTION_IS_WATCHDOG
|EMERGENCY_ACTION_WARN
,
1693 u
->reboot_arg
, -1, reason
);
1698 bool unit_shall_confirm_spawn(Unit
*u
) {
1701 if (manager_is_confirm_spawn_disabled(u
->manager
))
1704 /* For some reasons units remaining in the same process group
1705 * as PID 1 fail to acquire the console even if it's not used
1706 * by any process. So skip the confirmation question for them. */
1707 return !unit_get_exec_context(u
)->same_pgrp
;
1710 static bool unit_verify_deps(Unit
*u
) {
1717 /* Checks whether all BindsTo= dependencies of this unit are fulfilled — if they are also combined with
1718 * After=. We do not check Requires= or Requisite= here as they only should have an effect on the job
1719 * processing, but do not have any effect afterwards. We don't check BindsTo= dependencies that are not used in
1720 * conjunction with After= as for them any such check would make things entirely racy. */
1722 HASHMAP_FOREACH_KEY(v
, other
, u
->dependencies
[UNIT_BINDS_TO
], j
) {
1724 if (!hashmap_contains(u
->dependencies
[UNIT_AFTER
], other
))
1727 if (!UNIT_IS_ACTIVE_OR_RELOADING(unit_active_state(other
))) {
1728 log_unit_notice(u
, "Bound to unit %s, but unit isn't active.", other
->id
);
1736 /* Errors that aren't really errors:
1737 * -EALREADY: Unit is already started.
1738 * -ECOMM: Condition failed
1739 * -EAGAIN: An operation is already in progress. Retry later.
1741 * Errors that are real errors:
1742 * -EBADR: This unit type does not support starting.
1743 * -ECANCELED: Start limit hit, too many requests for now
1744 * -EPROTO: Assert failed
1745 * -EINVAL: Unit not loaded
1746 * -EOPNOTSUPP: Unit type not supported
1747 * -ENOLINK: The necessary dependencies are not fulfilled.
1748 * -ESTALE: This unit has been started before and can't be started a second time
1749 * -ENOENT: This is a triggering unit and unit to trigger is not loaded
1751 int unit_start(Unit
*u
) {
1752 UnitActiveState state
;
1758 /* If this is already started, then this will succeed. Note that this will even succeed if this unit
1759 * is not startable by the user. This is relied on to detect when we need to wait for units and when
1760 * waiting is finished. */
1761 state
= unit_active_state(u
);
1762 if (UNIT_IS_ACTIVE_OR_RELOADING(state
))
1764 if (state
== UNIT_MAINTENANCE
)
1767 /* Units that aren't loaded cannot be started */
1768 if (u
->load_state
!= UNIT_LOADED
)
1771 /* Refuse starting scope units more than once */
1772 if (UNIT_VTABLE(u
)->once_only
&& dual_timestamp_is_set(&u
->inactive_enter_timestamp
))
1775 /* If the conditions failed, don't do anything at all. If we already are activating this call might
1776 * still be useful to speed up activation in case there is some hold-off time, but we don't want to
1777 * recheck the condition in that case. */
1778 if (state
!= UNIT_ACTIVATING
&&
1779 !unit_test_condition(u
)) {
1781 /* Let's also check the start limit here. Normally, the start limit is only checked by the
1782 * .start() method of the unit type after it did some additional checks verifying everything
1783 * is in order (so that those other checks can propagate errors properly). However, if a
1784 * condition check doesn't hold we don't get that far but we should still ensure we are not
1785 * called in a tight loop without a rate limit check enforced, hence do the check here. Note
1786 * that ECOMM is generally not a reason for a job to fail, unlike most other errors here,
1787 * hence the chance is big that any triggering unit for us will trigger us again. Note this
1788 * condition check is a bit different from the condition check inside the per-unit .start()
1789 * function, as this one will not change the unit's state in any way (and we shouldn't here,
1790 * after all the condition failed). */
1792 r
= unit_test_start_limit(u
);
1796 return log_unit_debug_errno(u
, SYNTHETIC_ERRNO(ECOMM
), "Starting requested but condition failed. Not starting unit.");
1799 /* If the asserts failed, fail the entire job */
1800 if (state
!= UNIT_ACTIVATING
&&
1801 !unit_test_assert(u
))
1802 return log_unit_notice_errno(u
, SYNTHETIC_ERRNO(EPROTO
), "Starting requested but asserts failed.");
1804 /* Units of types that aren't supported cannot be started. Note that we do this test only after the
1805 * condition checks, so that we rather return condition check errors (which are usually not
1806 * considered a true failure) than "not supported" errors (which are considered a failure).
1808 if (!unit_type_supported(u
->type
))
1811 /* Let's make sure that the deps really are in order before we start this. Normally the job engine
1812 * should have taken care of this already, but let's check this here again. After all, our
1813 * dependencies might not be in effect anymore, due to a reload or due to a failed condition. */
1814 if (!unit_verify_deps(u
))
1817 /* Forward to the main object, if we aren't it. */
1818 following
= unit_following(u
);
1820 log_unit_debug(u
, "Redirecting start request from %s to %s.", u
->id
, following
->id
);
1821 return unit_start(following
);
1824 /* If it is stopped, but we cannot start it, then fail */
1825 if (!UNIT_VTABLE(u
)->start
)
1828 /* We don't suppress calls to ->start() here when we are already starting, to allow this request to
1829 * be used as a "hurry up" call, for example when the unit is in some "auto restart" state where it
1830 * waits for a holdoff timer to elapse before it will start again. */
1832 unit_add_to_dbus_queue(u
);
1834 return UNIT_VTABLE(u
)->start(u
);
1837 bool unit_can_start(Unit
*u
) {
1840 if (u
->load_state
!= UNIT_LOADED
)
1843 if (!unit_type_supported(u
->type
))
1846 /* Scope units may be started only once */
1847 if (UNIT_VTABLE(u
)->once_only
&& dual_timestamp_is_set(&u
->inactive_exit_timestamp
))
1850 return !!UNIT_VTABLE(u
)->start
;
1853 bool unit_can_isolate(Unit
*u
) {
1856 return unit_can_start(u
) &&
1861 * -EBADR: This unit type does not support stopping.
1862 * -EALREADY: Unit is already stopped.
1863 * -EAGAIN: An operation is already in progress. Retry later.
1865 int unit_stop(Unit
*u
) {
1866 UnitActiveState state
;
1871 state
= unit_active_state(u
);
1872 if (UNIT_IS_INACTIVE_OR_FAILED(state
))
1875 following
= unit_following(u
);
1877 log_unit_debug(u
, "Redirecting stop request from %s to %s.", u
->id
, following
->id
);
1878 return unit_stop(following
);
1881 if (!UNIT_VTABLE(u
)->stop
)
1884 unit_add_to_dbus_queue(u
);
1886 return UNIT_VTABLE(u
)->stop(u
);
1889 bool unit_can_stop(Unit
*u
) {
1892 if (!unit_type_supported(u
->type
))
1898 return !!UNIT_VTABLE(u
)->stop
;
1902 * -EBADR: This unit type does not support reloading.
1903 * -ENOEXEC: Unit is not started.
1904 * -EAGAIN: An operation is already in progress. Retry later.
1906 int unit_reload(Unit
*u
) {
1907 UnitActiveState state
;
1912 if (u
->load_state
!= UNIT_LOADED
)
1915 if (!unit_can_reload(u
))
1918 state
= unit_active_state(u
);
1919 if (state
== UNIT_RELOADING
)
1922 if (state
!= UNIT_ACTIVE
) {
1923 log_unit_warning(u
, "Unit cannot be reloaded because it is inactive.");
1927 following
= unit_following(u
);
1929 log_unit_debug(u
, "Redirecting reload request from %s to %s.", u
->id
, following
->id
);
1930 return unit_reload(following
);
1933 unit_add_to_dbus_queue(u
);
1935 if (!UNIT_VTABLE(u
)->reload
) {
1936 /* Unit doesn't have a reload function, but we need to propagate the reload anyway */
1937 unit_notify(u
, unit_active_state(u
), unit_active_state(u
), 0);
1941 return UNIT_VTABLE(u
)->reload(u
);
1944 bool unit_can_reload(Unit
*u
) {
1947 if (UNIT_VTABLE(u
)->can_reload
)
1948 return UNIT_VTABLE(u
)->can_reload(u
);
1950 if (!hashmap_isempty(u
->dependencies
[UNIT_PROPAGATES_RELOAD_TO
]))
1953 return UNIT_VTABLE(u
)->reload
;
1956 bool unit_is_unneeded(Unit
*u
) {
1957 static const UnitDependency deps
[] = {
1967 if (!u
->stop_when_unneeded
)
1970 /* Don't clean up while the unit is transitioning or is even inactive. */
1971 if (!UNIT_IS_ACTIVE_OR_RELOADING(unit_active_state(u
)))
1976 for (j
= 0; j
< ELEMENTSOF(deps
); j
++) {
1981 /* If a dependent unit has a job queued, is active or transitioning, or is marked for
1982 * restart, then don't clean this one up. */
1984 HASHMAP_FOREACH_KEY(v
, other
, u
->dependencies
[deps
[j
]], i
) {
1988 if (!UNIT_IS_INACTIVE_OR_FAILED(unit_active_state(other
)))
1991 if (unit_will_restart(other
))
1999 static void check_unneeded_dependencies(Unit
*u
) {
2001 static const UnitDependency deps
[] = {
2011 /* Add all units this unit depends on to the queue that processes StopWhenUnneeded= behaviour. */
2013 for (j
= 0; j
< ELEMENTSOF(deps
); j
++) {
2018 HASHMAP_FOREACH_KEY(v
, other
, u
->dependencies
[deps
[j
]], i
)
2019 unit_submit_to_stop_when_unneeded_queue(other
);
2023 static void unit_check_binds_to(Unit
*u
) {
2024 _cleanup_(sd_bus_error_free
) sd_bus_error error
= SD_BUS_ERROR_NULL
;
2036 if (unit_active_state(u
) != UNIT_ACTIVE
)
2039 HASHMAP_FOREACH_KEY(v
, other
, u
->dependencies
[UNIT_BINDS_TO
], i
) {
2043 if (!other
->coldplugged
)
2044 /* We might yet create a job for the other unit… */
2047 if (!UNIT_IS_INACTIVE_OR_FAILED(unit_active_state(other
)))
2057 /* If stopping a unit fails continuously we might enter a stop
2058 * loop here, hence stop acting on the service being
2059 * unnecessary after a while. */
2060 if (!ratelimit_below(&u
->auto_stop_ratelimit
)) {
2061 log_unit_warning(u
, "Unit is bound to inactive unit %s, but not stopping since we tried this too often recently.", other
->id
);
2066 log_unit_info(u
, "Unit is bound to inactive unit %s. Stopping, too.", other
->id
);
2068 /* A unit we need to run is gone. Sniff. Let's stop this. */
2069 r
= manager_add_job(u
->manager
, JOB_STOP
, u
, JOB_FAIL
, NULL
, &error
, NULL
);
2071 log_unit_warning_errno(u
, r
, "Failed to enqueue stop job, ignoring: %s", bus_error_message(&error
, r
));
2074 static void retroactively_start_dependencies(Unit
*u
) {
2080 assert(UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(u
)));
2082 HASHMAP_FOREACH_KEY(v
, other
, u
->dependencies
[UNIT_REQUIRES
], i
)
2083 if (!hashmap_get(u
->dependencies
[UNIT_AFTER
], other
) &&
2084 !UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(other
)))
2085 manager_add_job(u
->manager
, JOB_START
, other
, JOB_REPLACE
, NULL
, NULL
, NULL
);
2087 HASHMAP_FOREACH_KEY(v
, other
, u
->dependencies
[UNIT_BINDS_TO
], i
)
2088 if (!hashmap_get(u
->dependencies
[UNIT_AFTER
], other
) &&
2089 !UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(other
)))
2090 manager_add_job(u
->manager
, JOB_START
, other
, JOB_REPLACE
, NULL
, NULL
, NULL
);
2092 HASHMAP_FOREACH_KEY(v
, other
, u
->dependencies
[UNIT_WANTS
], i
)
2093 if (!hashmap_get(u
->dependencies
[UNIT_AFTER
], other
) &&
2094 !UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(other
)))
2095 manager_add_job(u
->manager
, JOB_START
, other
, JOB_FAIL
, NULL
, NULL
, NULL
);
2097 HASHMAP_FOREACH_KEY(v
, other
, u
->dependencies
[UNIT_CONFLICTS
], i
)
2098 if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other
)))
2099 manager_add_job(u
->manager
, JOB_STOP
, other
, JOB_REPLACE
, NULL
, NULL
, NULL
);
2101 HASHMAP_FOREACH_KEY(v
, other
, u
->dependencies
[UNIT_CONFLICTED_BY
], i
)
2102 if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other
)))
2103 manager_add_job(u
->manager
, JOB_STOP
, other
, JOB_REPLACE
, NULL
, NULL
, NULL
);
2106 static void retroactively_stop_dependencies(Unit
*u
) {
2112 assert(UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(u
)));
2114 /* Pull down units which are bound to us recursively if enabled */
2115 HASHMAP_FOREACH_KEY(v
, other
, u
->dependencies
[UNIT_BOUND_BY
], i
)
2116 if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other
)))
2117 manager_add_job(u
->manager
, JOB_STOP
, other
, JOB_REPLACE
, NULL
, NULL
, NULL
);
2120 void unit_start_on_failure(Unit
*u
) {
2128 if (hashmap_size(u
->dependencies
[UNIT_ON_FAILURE
]) <= 0)
2131 log_unit_info(u
, "Triggering OnFailure= dependencies.");
2133 HASHMAP_FOREACH_KEY(v
, other
, u
->dependencies
[UNIT_ON_FAILURE
], i
) {
2134 _cleanup_(sd_bus_error_free
) sd_bus_error error
= SD_BUS_ERROR_NULL
;
2136 r
= manager_add_job(u
->manager
, JOB_START
, other
, u
->on_failure_job_mode
, NULL
, &error
, NULL
);
2138 log_unit_warning_errno(u
, r
, "Failed to enqueue OnFailure= job, ignoring: %s", bus_error_message(&error
, r
));
2142 void unit_trigger_notify(Unit
*u
) {
2149 HASHMAP_FOREACH_KEY(v
, other
, u
->dependencies
[UNIT_TRIGGERED_BY
], i
)
2150 if (UNIT_VTABLE(other
)->trigger_notify
)
2151 UNIT_VTABLE(other
)->trigger_notify(other
, u
);
2154 static int raise_level(int log_level
, bool condition_info
, bool condition_notice
) {
2155 if (condition_notice
&& log_level
> LOG_NOTICE
)
2157 if (condition_info
&& log_level
> LOG_INFO
)
2162 static int unit_log_resources(Unit
*u
) {
2163 struct iovec iovec
[1 + _CGROUP_IP_ACCOUNTING_METRIC_MAX
+ _CGROUP_IO_ACCOUNTING_METRIC_MAX
+ 4];
2164 bool any_traffic
= false, have_ip_accounting
= false, any_io
= false, have_io_accounting
= false;
2165 _cleanup_free_
char *igress
= NULL
, *egress
= NULL
, *rr
= NULL
, *wr
= NULL
;
2166 int log_level
= LOG_DEBUG
; /* May be raised if resources consumed over a treshold */
2167 size_t n_message_parts
= 0, n_iovec
= 0;
2168 char* message_parts
[1 + 2 + 2 + 1], *t
;
2169 nsec_t nsec
= NSEC_INFINITY
;
2170 CGroupIPAccountingMetric m
;
2173 const char* const ip_fields
[_CGROUP_IP_ACCOUNTING_METRIC_MAX
] = {
2174 [CGROUP_IP_INGRESS_BYTES
] = "IP_METRIC_INGRESS_BYTES",
2175 [CGROUP_IP_INGRESS_PACKETS
] = "IP_METRIC_INGRESS_PACKETS",
2176 [CGROUP_IP_EGRESS_BYTES
] = "IP_METRIC_EGRESS_BYTES",
2177 [CGROUP_IP_EGRESS_PACKETS
] = "IP_METRIC_EGRESS_PACKETS",
2179 const char* const io_fields
[_CGROUP_IO_ACCOUNTING_METRIC_MAX
] = {
2180 [CGROUP_IO_READ_BYTES
] = "IO_METRIC_READ_BYTES",
2181 [CGROUP_IO_WRITE_BYTES
] = "IO_METRIC_WRITE_BYTES",
2182 [CGROUP_IO_READ_OPERATIONS
] = "IO_METRIC_READ_OPERATIONS",
2183 [CGROUP_IO_WRITE_OPERATIONS
] = "IO_METRIC_WRITE_OPERATIONS",
2188 /* Invoked whenever a unit enters failed or dead state. Logs information about consumed resources if resource
2189 * accounting was enabled for a unit. It does this in two ways: a friendly human readable string with reduced
2190 * information and the complete data in structured fields. */
2192 (void) unit_get_cpu_usage(u
, &nsec
);
2193 if (nsec
!= NSEC_INFINITY
) {
2194 char buf
[FORMAT_TIMESPAN_MAX
] = "";
2196 /* Format the CPU time for inclusion in the structured log message */
2197 if (asprintf(&t
, "CPU_USAGE_NSEC=%" PRIu64
, nsec
) < 0) {
2201 iovec
[n_iovec
++] = IOVEC_MAKE_STRING(t
);
2203 /* Format the CPU time for inclusion in the human language message string */
2204 format_timespan(buf
, sizeof(buf
), nsec
/ NSEC_PER_USEC
, USEC_PER_MSEC
);
2205 t
= strjoin("consumed ", buf
, " CPU time");
2211 message_parts
[n_message_parts
++] = t
;
2213 log_level
= raise_level(log_level
,
2214 nsec
> NOTICEWORTHY_CPU_NSEC
,
2215 nsec
> MENTIONWORTHY_CPU_NSEC
);
2218 for (CGroupIOAccountingMetric k
= 0; k
< _CGROUP_IO_ACCOUNTING_METRIC_MAX
; k
++) {
2219 char buf
[FORMAT_BYTES_MAX
] = "";
2220 uint64_t value
= UINT64_MAX
;
2222 assert(io_fields
[k
]);
2224 (void) unit_get_io_accounting(u
, k
, k
> 0, &value
);
2225 if (value
== UINT64_MAX
)
2228 have_io_accounting
= true;
2232 /* Format IO accounting data for inclusion in the structured log message */
2233 if (asprintf(&t
, "%s=%" PRIu64
, io_fields
[k
], value
) < 0) {
2237 iovec
[n_iovec
++] = IOVEC_MAKE_STRING(t
);
2239 /* Format the IO accounting data for inclusion in the human language message string, but only
2240 * for the bytes counters (and not for the operations counters) */
2241 if (k
== CGROUP_IO_READ_BYTES
) {
2243 rr
= strjoin("read ", format_bytes(buf
, sizeof(buf
), value
), " from disk");
2248 } else if (k
== CGROUP_IO_WRITE_BYTES
) {
2250 wr
= strjoin("written ", format_bytes(buf
, sizeof(buf
), value
), " to disk");
2257 if (IN_SET(k
, CGROUP_IO_READ_BYTES
, CGROUP_IO_WRITE_BYTES
))
2258 log_level
= raise_level(log_level
,
2259 value
> MENTIONWORTHY_IO_BYTES
,
2260 value
> NOTICEWORTHY_IO_BYTES
);
2263 if (have_io_accounting
) {
2266 message_parts
[n_message_parts
++] = TAKE_PTR(rr
);
2268 message_parts
[n_message_parts
++] = TAKE_PTR(wr
);
2273 k
= strdup("no IO");
2279 message_parts
[n_message_parts
++] = k
;
2283 for (m
= 0; m
< _CGROUP_IP_ACCOUNTING_METRIC_MAX
; m
++) {
2284 char buf
[FORMAT_BYTES_MAX
] = "";
2285 uint64_t value
= UINT64_MAX
;
2287 assert(ip_fields
[m
]);
2289 (void) unit_get_ip_accounting(u
, m
, &value
);
2290 if (value
== UINT64_MAX
)
2293 have_ip_accounting
= true;
2297 /* Format IP accounting data for inclusion in the structured log message */
2298 if (asprintf(&t
, "%s=%" PRIu64
, ip_fields
[m
], value
) < 0) {
2302 iovec
[n_iovec
++] = IOVEC_MAKE_STRING(t
);
2304 /* Format the IP accounting data for inclusion in the human language message string, but only for the
2305 * bytes counters (and not for the packets counters) */
2306 if (m
== CGROUP_IP_INGRESS_BYTES
) {
2308 igress
= strjoin("received ", format_bytes(buf
, sizeof(buf
), value
), " IP traffic");
2313 } else if (m
== CGROUP_IP_EGRESS_BYTES
) {
2315 egress
= strjoin("sent ", format_bytes(buf
, sizeof(buf
), value
), " IP traffic");
2322 if (IN_SET(m
, CGROUP_IP_INGRESS_BYTES
, CGROUP_IP_EGRESS_BYTES
))
2323 log_level
= raise_level(log_level
,
2324 value
> MENTIONWORTHY_IP_BYTES
,
2325 value
> NOTICEWORTHY_IP_BYTES
);
2328 if (have_ip_accounting
) {
2331 message_parts
[n_message_parts
++] = TAKE_PTR(igress
);
2333 message_parts
[n_message_parts
++] = TAKE_PTR(egress
);
2338 k
= strdup("no IP traffic");
2344 message_parts
[n_message_parts
++] = k
;
2348 /* Is there any accounting data available at all? */
2354 if (n_message_parts
== 0)
2355 t
= strjoina("MESSAGE=", u
->id
, ": Completed.");
2357 _cleanup_free_
char *joined
;
2359 message_parts
[n_message_parts
] = NULL
;
2361 joined
= strv_join(message_parts
, ", ");
2367 joined
[0] = ascii_toupper(joined
[0]);
2368 t
= strjoina("MESSAGE=", u
->id
, ": ", joined
, ".");
2371 /* The following four fields we allocate on the stack or are static strings, we hence don't want to free them,
2372 * and hence don't increase n_iovec for them */
2373 iovec
[n_iovec
] = IOVEC_MAKE_STRING(t
);
2374 iovec
[n_iovec
+ 1] = IOVEC_MAKE_STRING("MESSAGE_ID=" SD_MESSAGE_UNIT_RESOURCES_STR
);
2376 t
= strjoina(u
->manager
->unit_log_field
, u
->id
);
2377 iovec
[n_iovec
+ 2] = IOVEC_MAKE_STRING(t
);
2379 t
= strjoina(u
->manager
->invocation_log_field
, u
->invocation_id_string
);
2380 iovec
[n_iovec
+ 3] = IOVEC_MAKE_STRING(t
);
2382 log_struct_iovec(log_level
, iovec
, n_iovec
+ 4);
2386 for (i
= 0; i
< n_message_parts
; i
++)
2387 free(message_parts
[i
]);
2389 for (i
= 0; i
< n_iovec
; i
++)
2390 free(iovec
[i
].iov_base
);
2396 static void unit_update_on_console(Unit
*u
) {
2401 b
= unit_needs_console(u
);
2402 if (u
->on_console
== b
)
2407 manager_ref_console(u
->manager
);
2409 manager_unref_console(u
->manager
);
2412 static void unit_emit_audit_start(Unit
*u
) {
2415 if (u
->type
!= UNIT_SERVICE
)
2418 /* Write audit record if we have just finished starting up */
2419 manager_send_unit_audit(u
->manager
, u
, AUDIT_SERVICE_START
, true);
2423 static void unit_emit_audit_stop(Unit
*u
, UnitActiveState state
) {
2426 if (u
->type
!= UNIT_SERVICE
)
2430 /* Write audit record if we have just finished shutting down */
2431 manager_send_unit_audit(u
->manager
, u
, AUDIT_SERVICE_STOP
, state
== UNIT_INACTIVE
);
2432 u
->in_audit
= false;
2434 /* Hmm, if there was no start record written write it now, so that we always have a nice pair */
2435 manager_send_unit_audit(u
->manager
, u
, AUDIT_SERVICE_START
, state
== UNIT_INACTIVE
);
2437 if (state
== UNIT_INACTIVE
)
2438 manager_send_unit_audit(u
->manager
, u
, AUDIT_SERVICE_STOP
, true);
2442 static bool unit_process_job(Job
*j
, UnitActiveState ns
, UnitNotifyFlags flags
) {
2443 bool unexpected
= false;
2448 if (j
->state
== JOB_WAITING
)
2450 /* So we reached a different state for this job. Let's see if we can run it now if it failed previously
2452 job_add_to_run_queue(j
);
2454 /* Let's check whether the unit's new state constitutes a finished job, or maybe contradicts a running job and
2455 * hence needs to invalidate jobs. */
2460 case JOB_VERIFY_ACTIVE
:
2462 if (UNIT_IS_ACTIVE_OR_RELOADING(ns
))
2463 job_finish_and_invalidate(j
, JOB_DONE
, true, false);
2464 else if (j
->state
== JOB_RUNNING
&& ns
!= UNIT_ACTIVATING
) {
2467 if (UNIT_IS_INACTIVE_OR_FAILED(ns
)) {
2468 if (ns
== UNIT_FAILED
)
2469 result
= JOB_FAILED
;
2470 else if (FLAGS_SET(flags
, UNIT_NOTIFY_SKIP_CONDITION
))
2471 result
= JOB_SKIPPED
;
2475 job_finish_and_invalidate(j
, result
, true, false);
2482 case JOB_RELOAD_OR_START
:
2483 case JOB_TRY_RELOAD
:
2485 if (j
->state
== JOB_RUNNING
) {
2486 if (ns
== UNIT_ACTIVE
)
2487 job_finish_and_invalidate(j
, (flags
& UNIT_NOTIFY_RELOAD_FAILURE
) ? JOB_FAILED
: JOB_DONE
, true, false);
2488 else if (!IN_SET(ns
, UNIT_ACTIVATING
, UNIT_RELOADING
)) {
2491 if (UNIT_IS_INACTIVE_OR_FAILED(ns
))
2492 job_finish_and_invalidate(j
, ns
== UNIT_FAILED
? JOB_FAILED
: JOB_DONE
, true, false);
2500 case JOB_TRY_RESTART
:
2502 if (UNIT_IS_INACTIVE_OR_FAILED(ns
))
2503 job_finish_and_invalidate(j
, JOB_DONE
, true, false);
2504 else if (j
->state
== JOB_RUNNING
&& ns
!= UNIT_DEACTIVATING
) {
2506 job_finish_and_invalidate(j
, JOB_FAILED
, true, false);
2512 assert_not_reached("Job type unknown");
2518 void unit_notify(Unit
*u
, UnitActiveState os
, UnitActiveState ns
, UnitNotifyFlags flags
) {
2523 assert(os
< _UNIT_ACTIVE_STATE_MAX
);
2524 assert(ns
< _UNIT_ACTIVE_STATE_MAX
);
2526 /* Note that this is called for all low-level state changes, even if they might map to the same high-level
2527 * UnitActiveState! That means that ns == os is an expected behavior here. For example: if a mount point is
2528 * remounted this function will be called too! */
2532 /* Let's enqueue the change signal early. In case this unit has a job associated we want that this unit is in
2533 * the bus queue, so that any job change signal queued will force out the unit change signal first. */
2534 unit_add_to_dbus_queue(u
);
2536 /* Update timestamps for state changes */
2537 if (!MANAGER_IS_RELOADING(m
)) {
2538 dual_timestamp_get(&u
->state_change_timestamp
);
2540 if (UNIT_IS_INACTIVE_OR_FAILED(os
) && !UNIT_IS_INACTIVE_OR_FAILED(ns
))
2541 u
->inactive_exit_timestamp
= u
->state_change_timestamp
;
2542 else if (!UNIT_IS_INACTIVE_OR_FAILED(os
) && UNIT_IS_INACTIVE_OR_FAILED(ns
))
2543 u
->inactive_enter_timestamp
= u
->state_change_timestamp
;
2545 if (!UNIT_IS_ACTIVE_OR_RELOADING(os
) && UNIT_IS_ACTIVE_OR_RELOADING(ns
))
2546 u
->active_enter_timestamp
= u
->state_change_timestamp
;
2547 else if (UNIT_IS_ACTIVE_OR_RELOADING(os
) && !UNIT_IS_ACTIVE_OR_RELOADING(ns
))
2548 u
->active_exit_timestamp
= u
->state_change_timestamp
;
2551 /* Keep track of failed units */
2552 (void) manager_update_failed_units(m
, u
, ns
== UNIT_FAILED
);
2554 /* Make sure the cgroup and state files are always removed when we become inactive */
2555 if (UNIT_IS_INACTIVE_OR_FAILED(ns
)) {
2556 unit_prune_cgroup(u
);
2557 unit_unlink_state_files(u
);
2560 unit_update_on_console(u
);
2562 if (!MANAGER_IS_RELOADING(m
)) {
2565 /* Let's propagate state changes to the job */
2567 unexpected
= unit_process_job(u
->job
, ns
, flags
);
2571 /* If this state change happened without being requested by a job, then let's retroactively start or
2572 * stop dependencies. We skip that step when deserializing, since we don't want to create any
2573 * additional jobs just because something is already activated. */
2576 if (UNIT_IS_INACTIVE_OR_FAILED(os
) && UNIT_IS_ACTIVE_OR_ACTIVATING(ns
))
2577 retroactively_start_dependencies(u
);
2578 else if (UNIT_IS_ACTIVE_OR_ACTIVATING(os
) && UNIT_IS_INACTIVE_OR_DEACTIVATING(ns
))
2579 retroactively_stop_dependencies(u
);
2582 /* stop unneeded units regardless if going down was expected or not */
2583 if (UNIT_IS_INACTIVE_OR_FAILED(ns
))
2584 check_unneeded_dependencies(u
);
2586 if (ns
!= os
&& ns
== UNIT_FAILED
) {
2587 log_unit_debug(u
, "Unit entered failed state.");
2589 if (!(flags
& UNIT_NOTIFY_WILL_AUTO_RESTART
))
2590 unit_start_on_failure(u
);
2593 if (UNIT_IS_ACTIVE_OR_RELOADING(ns
) && !UNIT_IS_ACTIVE_OR_RELOADING(os
)) {
2594 /* This unit just finished starting up */
2596 unit_emit_audit_start(u
);
2597 manager_send_unit_plymouth(m
, u
);
2600 if (UNIT_IS_INACTIVE_OR_FAILED(ns
) && !UNIT_IS_INACTIVE_OR_FAILED(os
)) {
2601 /* This unit just stopped/failed. */
2603 unit_emit_audit_stop(u
, ns
);
2604 unit_log_resources(u
);
2608 manager_recheck_journal(m
);
2609 manager_recheck_dbus(m
);
2611 unit_trigger_notify(u
);
2613 if (!MANAGER_IS_RELOADING(m
)) {
2614 /* Maybe we finished startup and are now ready for being stopped because unneeded? */
2615 unit_submit_to_stop_when_unneeded_queue(u
);
2617 /* Maybe we finished startup, but something we needed has vanished? Let's die then. (This happens when
2618 * something BindsTo= to a Type=oneshot unit, as these units go directly from starting to inactive,
2619 * without ever entering started.) */
2620 unit_check_binds_to(u
);
2622 if (os
!= UNIT_FAILED
&& ns
== UNIT_FAILED
) {
2623 reason
= strjoina("unit ", u
->id
, " failed");
2624 emergency_action(m
, u
->failure_action
, 0, u
->reboot_arg
, unit_failure_action_exit_status(u
), reason
);
2625 } else if (!UNIT_IS_INACTIVE_OR_FAILED(os
) && ns
== UNIT_INACTIVE
) {
2626 reason
= strjoina("unit ", u
->id
, " succeeded");
2627 emergency_action(m
, u
->success_action
, 0, u
->reboot_arg
, unit_success_action_exit_status(u
), reason
);
2631 unit_add_to_gc_queue(u
);
2634 int unit_watch_pid(Unit
*u
, pid_t pid
, bool exclusive
) {
2638 assert(pid_is_valid(pid
));
2640 /* Watch a specific PID */
2642 /* Caller might be sure that this PID belongs to this unit only. Let's take this
2643 * opportunity to remove any stalled references to this PID as they can be created
2644 * easily (when watching a process which is not our direct child). */
2646 manager_unwatch_pid(u
->manager
, pid
);
2648 r
= set_ensure_allocated(&u
->pids
, NULL
);
2652 r
= hashmap_ensure_allocated(&u
->manager
->watch_pids
, NULL
);
2656 /* First try, let's add the unit keyed by "pid". */
2657 r
= hashmap_put(u
->manager
->watch_pids
, PID_TO_PTR(pid
), u
);
2663 /* OK, the "pid" key is already assigned to a different unit. Let's see if the "-pid" key (which points
2664 * to an array of Units rather than just a Unit), lists us already. */
2666 array
= hashmap_get(u
->manager
->watch_pids
, PID_TO_PTR(-pid
));
2668 for (; array
[n
]; n
++)
2672 if (found
) /* Found it already? if so, do nothing */
2677 /* Allocate a new array */
2678 new_array
= new(Unit
*, n
+ 2);
2682 memcpy_safe(new_array
, array
, sizeof(Unit
*) * n
);
2684 new_array
[n
+1] = NULL
;
2686 /* Add or replace the old array */
2687 r
= hashmap_replace(u
->manager
->watch_pids
, PID_TO_PTR(-pid
), new_array
);
2698 r
= set_put(u
->pids
, PID_TO_PTR(pid
));
2705 void unit_unwatch_pid(Unit
*u
, pid_t pid
) {
2709 assert(pid_is_valid(pid
));
2711 /* First let's drop the unit in case it's keyed as "pid". */
2712 (void) hashmap_remove_value(u
->manager
->watch_pids
, PID_TO_PTR(pid
), u
);
2714 /* Then, let's also drop the unit, in case it's in the array keyed by -pid */
2715 array
= hashmap_get(u
->manager
->watch_pids
, PID_TO_PTR(-pid
));
2719 /* Let's iterate through the array, dropping our own entry */
2720 for (n
= 0; array
[n
]; n
++)
2722 array
[m
++] = array
[n
];
2726 /* The array is now empty, remove the entire entry */
2727 assert(hashmap_remove(u
->manager
->watch_pids
, PID_TO_PTR(-pid
)) == array
);
2732 (void) set_remove(u
->pids
, PID_TO_PTR(pid
));
2735 void unit_unwatch_all_pids(Unit
*u
) {
2738 while (!set_isempty(u
->pids
))
2739 unit_unwatch_pid(u
, PTR_TO_PID(set_first(u
->pids
)));
2741 u
->pids
= set_free(u
->pids
);
2744 static void unit_tidy_watch_pids(Unit
*u
) {
2745 pid_t except1
, except2
;
2751 /* Cleans dead PIDs from our list */
2753 except1
= unit_main_pid(u
);
2754 except2
= unit_control_pid(u
);
2756 SET_FOREACH(e
, u
->pids
, i
) {
2757 pid_t pid
= PTR_TO_PID(e
);
2759 if (pid
== except1
|| pid
== except2
)
2762 if (!pid_is_unwaited(pid
))
2763 unit_unwatch_pid(u
, pid
);
2767 static int on_rewatch_pids_event(sd_event_source
*s
, void *userdata
) {
2773 unit_tidy_watch_pids(u
);
2774 unit_watch_all_pids(u
);
2776 /* If the PID set is empty now, then let's finish this off. */
2777 unit_synthesize_cgroup_empty_event(u
);
2782 int unit_enqueue_rewatch_pids(Unit
*u
) {
2787 if (!u
->cgroup_path
)
2790 r
= cg_unified_controller(SYSTEMD_CGROUP_CONTROLLER
);
2793 if (r
> 0) /* On unified we can use proper notifications */
2796 /* Enqueues a low-priority job that will clean up dead PIDs from our list of PIDs to watch and subscribe to new
2797 * PIDs that might have appeared. We do this in a delayed job because the work might be quite slow, as it
2798 * involves issuing kill(pid, 0) on all processes we watch. */
2800 if (!u
->rewatch_pids_event_source
) {
2801 _cleanup_(sd_event_source_unrefp
) sd_event_source
*s
= NULL
;
2803 r
= sd_event_add_defer(u
->manager
->event
, &s
, on_rewatch_pids_event
, u
);
2805 return log_error_errno(r
, "Failed to allocate event source for tidying watched PIDs: %m");
2807 r
= sd_event_source_set_priority(s
, SD_EVENT_PRIORITY_IDLE
);
2809 return log_error_errno(r
, "Failed to adjust priority of event source for tidying watched PIDs: m");
2811 (void) sd_event_source_set_description(s
, "tidy-watch-pids");
2813 u
->rewatch_pids_event_source
= TAKE_PTR(s
);
2816 r
= sd_event_source_set_enabled(u
->rewatch_pids_event_source
, SD_EVENT_ONESHOT
);
2818 return log_error_errno(r
, "Failed to enable event source for tidying watched PIDs: %m");
2823 void unit_dequeue_rewatch_pids(Unit
*u
) {
2827 if (!u
->rewatch_pids_event_source
)
2830 r
= sd_event_source_set_enabled(u
->rewatch_pids_event_source
, SD_EVENT_OFF
);
2832 log_warning_errno(r
, "Failed to disable event source for tidying watched PIDs, ignoring: %m");
2834 u
->rewatch_pids_event_source
= sd_event_source_unref(u
->rewatch_pids_event_source
);
2837 bool unit_job_is_applicable(Unit
*u
, JobType j
) {
2839 assert(j
>= 0 && j
< _JOB_TYPE_MAX
);
2843 case JOB_VERIFY_ACTIVE
:
2846 /* Note that we don't check unit_can_start() here. That's because .device units and suchlike are not
2847 * startable by us but may appear due to external events, and it thus makes sense to permit enqueing
2852 /* Similar as above. However, perpetual units can never be stopped (neither explicitly nor due to
2853 * external events), hence it makes no sense to permit enqueing such a request either. */
2854 return !u
->perpetual
;
2857 case JOB_TRY_RESTART
:
2858 return unit_can_stop(u
) && unit_can_start(u
);
2861 case JOB_TRY_RELOAD
:
2862 return unit_can_reload(u
);
2864 case JOB_RELOAD_OR_START
:
2865 return unit_can_reload(u
) && unit_can_start(u
);
2868 assert_not_reached("Invalid job type");
2872 static void maybe_warn_about_dependency(Unit
*u
, const char *other
, UnitDependency dependency
) {
2875 /* Only warn about some unit types */
2876 if (!IN_SET(dependency
, UNIT_CONFLICTS
, UNIT_CONFLICTED_BY
, UNIT_BEFORE
, UNIT_AFTER
, UNIT_ON_FAILURE
, UNIT_TRIGGERS
, UNIT_TRIGGERED_BY
))
2879 if (streq_ptr(u
->id
, other
))
2880 log_unit_warning(u
, "Dependency %s=%s dropped", unit_dependency_to_string(dependency
), u
->id
);
2882 log_unit_warning(u
, "Dependency %s=%s dropped, merged into %s", unit_dependency_to_string(dependency
), strna(other
), u
->id
);
2885 static int unit_add_dependency_hashmap(
2888 UnitDependencyMask origin_mask
,
2889 UnitDependencyMask destination_mask
) {
2891 UnitDependencyInfo info
;
2896 assert(origin_mask
< _UNIT_DEPENDENCY_MASK_FULL
);
2897 assert(destination_mask
< _UNIT_DEPENDENCY_MASK_FULL
);
2898 assert(origin_mask
> 0 || destination_mask
> 0);
2900 r
= hashmap_ensure_allocated(h
, NULL
);
2904 assert_cc(sizeof(void*) == sizeof(info
));
2906 info
.data
= hashmap_get(*h
, other
);
2908 /* Entry already exists. Add in our mask. */
2910 if (FLAGS_SET(origin_mask
, info
.origin_mask
) &&
2911 FLAGS_SET(destination_mask
, info
.destination_mask
))
2914 info
.origin_mask
|= origin_mask
;
2915 info
.destination_mask
|= destination_mask
;
2917 r
= hashmap_update(*h
, other
, info
.data
);
2919 info
= (UnitDependencyInfo
) {
2920 .origin_mask
= origin_mask
,
2921 .destination_mask
= destination_mask
,
2924 r
= hashmap_put(*h
, other
, info
.data
);
2932 int unit_add_dependency(
2937 UnitDependencyMask mask
) {
2939 static const UnitDependency inverse_table
[_UNIT_DEPENDENCY_MAX
] = {
2940 [UNIT_REQUIRES
] = UNIT_REQUIRED_BY
,
2941 [UNIT_WANTS
] = UNIT_WANTED_BY
,
2942 [UNIT_REQUISITE
] = UNIT_REQUISITE_OF
,
2943 [UNIT_BINDS_TO
] = UNIT_BOUND_BY
,
2944 [UNIT_PART_OF
] = UNIT_CONSISTS_OF
,
2945 [UNIT_REQUIRED_BY
] = UNIT_REQUIRES
,
2946 [UNIT_REQUISITE_OF
] = UNIT_REQUISITE
,
2947 [UNIT_WANTED_BY
] = UNIT_WANTS
,
2948 [UNIT_BOUND_BY
] = UNIT_BINDS_TO
,
2949 [UNIT_CONSISTS_OF
] = UNIT_PART_OF
,
2950 [UNIT_CONFLICTS
] = UNIT_CONFLICTED_BY
,
2951 [UNIT_CONFLICTED_BY
] = UNIT_CONFLICTS
,
2952 [UNIT_BEFORE
] = UNIT_AFTER
,
2953 [UNIT_AFTER
] = UNIT_BEFORE
,
2954 [UNIT_ON_FAILURE
] = _UNIT_DEPENDENCY_INVALID
,
2955 [UNIT_REFERENCES
] = UNIT_REFERENCED_BY
,
2956 [UNIT_REFERENCED_BY
] = UNIT_REFERENCES
,
2957 [UNIT_TRIGGERS
] = UNIT_TRIGGERED_BY
,
2958 [UNIT_TRIGGERED_BY
] = UNIT_TRIGGERS
,
2959 [UNIT_PROPAGATES_RELOAD_TO
] = UNIT_RELOAD_PROPAGATED_FROM
,
2960 [UNIT_RELOAD_PROPAGATED_FROM
] = UNIT_PROPAGATES_RELOAD_TO
,
2961 [UNIT_JOINS_NAMESPACE_OF
] = UNIT_JOINS_NAMESPACE_OF
,
2963 Unit
*original_u
= u
, *original_other
= other
;
2967 assert(d
>= 0 && d
< _UNIT_DEPENDENCY_MAX
);
2970 u
= unit_follow_merge(u
);
2971 other
= unit_follow_merge(other
);
2973 /* We won't allow dependencies on ourselves. We will not
2974 * consider them an error however. */
2976 maybe_warn_about_dependency(original_u
, original_other
->id
, d
);
2980 if ((d
== UNIT_BEFORE
&& other
->type
== UNIT_DEVICE
) ||
2981 (d
== UNIT_AFTER
&& u
->type
== UNIT_DEVICE
)) {
2982 log_unit_warning(u
, "Dependency Before=%s ignored (.device units cannot be delayed)", other
->id
);
2986 r
= unit_add_dependency_hashmap(u
->dependencies
+ d
, other
, mask
, 0);
2990 if (inverse_table
[d
] != _UNIT_DEPENDENCY_INVALID
&& inverse_table
[d
] != d
) {
2991 r
= unit_add_dependency_hashmap(other
->dependencies
+ inverse_table
[d
], u
, 0, mask
);
2996 if (add_reference
) {
2997 r
= unit_add_dependency_hashmap(u
->dependencies
+ UNIT_REFERENCES
, other
, mask
, 0);
3001 r
= unit_add_dependency_hashmap(other
->dependencies
+ UNIT_REFERENCED_BY
, u
, 0, mask
);
3006 unit_add_to_dbus_queue(u
);
3010 int unit_add_two_dependencies(Unit
*u
, UnitDependency d
, UnitDependency e
, Unit
*other
, bool add_reference
, UnitDependencyMask mask
) {
3015 r
= unit_add_dependency(u
, d
, other
, add_reference
, mask
);
3019 return unit_add_dependency(u
, e
, other
, add_reference
, mask
);
3022 static int resolve_template(Unit
*u
, const char *name
, char **buf
, const char **ret
) {
3030 if (!unit_name_is_valid(name
, UNIT_NAME_TEMPLATE
)) {
3037 r
= unit_name_replace_instance(name
, u
->instance
, buf
);
3039 _cleanup_free_
char *i
= NULL
;
3041 r
= unit_name_to_prefix(u
->id
, &i
);
3045 r
= unit_name_replace_instance(name
, i
, buf
);
3054 int unit_add_dependency_by_name(Unit
*u
, UnitDependency d
, const char *name
, bool add_reference
, UnitDependencyMask mask
) {
3055 _cleanup_free_
char *buf
= NULL
;
3062 r
= resolve_template(u
, name
, &buf
, &name
);
3066 r
= manager_load_unit(u
->manager
, name
, NULL
, NULL
, &other
);
3070 return unit_add_dependency(u
, d
, other
, add_reference
, mask
);
3073 int unit_add_two_dependencies_by_name(Unit
*u
, UnitDependency d
, UnitDependency e
, const char *name
, bool add_reference
, UnitDependencyMask mask
) {
3074 _cleanup_free_
char *buf
= NULL
;
3081 r
= resolve_template(u
, name
, &buf
, &name
);
3085 r
= manager_load_unit(u
->manager
, name
, NULL
, NULL
, &other
);
3089 return unit_add_two_dependencies(u
, d
, e
, other
, add_reference
, mask
);
3092 int set_unit_path(const char *p
) {
3093 /* This is mostly for debug purposes */
3094 if (setenv("SYSTEMD_UNIT_PATH", p
, 1) < 0)
3100 char *unit_dbus_path(Unit
*u
) {
3106 return unit_dbus_path_from_name(u
->id
);
3109 char *unit_dbus_path_invocation_id(Unit
*u
) {
3112 if (sd_id128_is_null(u
->invocation_id
))
3115 return unit_dbus_path_from_name(u
->invocation_id_string
);
3118 int unit_set_slice(Unit
*u
, Unit
*slice
) {
3122 /* Sets the unit slice if it has not been set before. Is extra
3123 * careful, to only allow this for units that actually have a
3124 * cgroup context. Also, we don't allow to set this for slices
3125 * (since the parent slice is derived from the name). Make
3126 * sure the unit we set is actually a slice. */
3128 if (!UNIT_HAS_CGROUP_CONTEXT(u
))
3131 if (u
->type
== UNIT_SLICE
)
3134 if (unit_active_state(u
) != UNIT_INACTIVE
)
3137 if (slice
->type
!= UNIT_SLICE
)
3140 if (unit_has_name(u
, SPECIAL_INIT_SCOPE
) &&
3141 !unit_has_name(slice
, SPECIAL_ROOT_SLICE
))
3144 if (UNIT_DEREF(u
->slice
) == slice
)
3147 /* Disallow slice changes if @u is already bound to cgroups */
3148 if (UNIT_ISSET(u
->slice
) && u
->cgroup_realized
)
3151 unit_ref_set(&u
->slice
, u
, slice
);
3155 int unit_set_default_slice(Unit
*u
) {
3156 const char *slice_name
;
3162 if (UNIT_ISSET(u
->slice
))
3166 _cleanup_free_
char *prefix
= NULL
, *escaped
= NULL
;
3168 /* Implicitly place all instantiated units in their
3169 * own per-template slice */
3171 r
= unit_name_to_prefix(u
->id
, &prefix
);
3175 /* The prefix is already escaped, but it might include
3176 * "-" which has a special meaning for slice units,
3177 * hence escape it here extra. */
3178 escaped
= unit_name_escape(prefix
);
3182 if (MANAGER_IS_SYSTEM(u
->manager
))
3183 slice_name
= strjoina("system-", escaped
, ".slice");
3185 slice_name
= strjoina(escaped
, ".slice");
3188 MANAGER_IS_SYSTEM(u
->manager
) && !unit_has_name(u
, SPECIAL_INIT_SCOPE
)
3189 ? SPECIAL_SYSTEM_SLICE
3190 : SPECIAL_ROOT_SLICE
;
3192 r
= manager_load_unit(u
->manager
, slice_name
, NULL
, NULL
, &slice
);
3196 return unit_set_slice(u
, slice
);
3199 const char *unit_slice_name(Unit
*u
) {
3202 if (!UNIT_ISSET(u
->slice
))
3205 return UNIT_DEREF(u
->slice
)->id
;
3208 int unit_load_related_unit(Unit
*u
, const char *type
, Unit
**_found
) {
3209 _cleanup_free_
char *t
= NULL
;
3216 r
= unit_name_change_suffix(u
->id
, type
, &t
);
3219 if (unit_has_name(u
, t
))
3222 r
= manager_load_unit(u
->manager
, t
, NULL
, NULL
, _found
);
3223 assert(r
< 0 || *_found
!= u
);
3227 static int signal_name_owner_changed(sd_bus_message
*message
, void *userdata
, sd_bus_error
*error
) {
3228 const char *name
, *old_owner
, *new_owner
;
3235 r
= sd_bus_message_read(message
, "sss", &name
, &old_owner
, &new_owner
);
3237 bus_log_parse_error(r
);
3241 old_owner
= empty_to_null(old_owner
);
3242 new_owner
= empty_to_null(new_owner
);
3244 if (UNIT_VTABLE(u
)->bus_name_owner_change
)
3245 UNIT_VTABLE(u
)->bus_name_owner_change(u
, old_owner
, new_owner
);
3250 static int get_name_owner_handler(sd_bus_message
*message
, void *userdata
, sd_bus_error
*error
) {
3251 const sd_bus_error
*e
;
3252 const char *new_owner
;
3259 u
->get_name_owner_slot
= sd_bus_slot_unref(u
->get_name_owner_slot
);
3261 if (sd_bus_error_is_set(error
)) {
3262 log_error("Failed to get name owner from bus: %s", error
->message
);
3266 e
= sd_bus_message_get_error(message
);
3267 if (sd_bus_error_has_name(e
, "org.freedesktop.DBus.Error.NameHasNoOwner"))
3271 log_error("Unexpected error response from GetNameOwner: %s", e
->message
);
3275 r
= sd_bus_message_read(message
, "s", &new_owner
);
3277 bus_log_parse_error(r
);
3281 new_owner
= empty_to_null(new_owner
);
3283 if (UNIT_VTABLE(u
)->bus_name_owner_change
)
3284 UNIT_VTABLE(u
)->bus_name_owner_change(u
, NULL
, new_owner
);
3289 int unit_install_bus_match(Unit
*u
, sd_bus
*bus
, const char *name
) {
3296 if (u
->match_bus_slot
)
3299 match
= strjoina("type='signal',"
3300 "sender='org.freedesktop.DBus',"
3301 "path='/org/freedesktop/DBus',"
3302 "interface='org.freedesktop.DBus',"
3303 "member='NameOwnerChanged',"
3304 "arg0='", name
, "'");
3306 int r
= sd_bus_add_match_async(bus
, &u
->match_bus_slot
, match
, signal_name_owner_changed
, NULL
, u
);
3310 return sd_bus_call_method_async(bus
,
3311 &u
->get_name_owner_slot
,
3312 "org.freedesktop.DBus",
3313 "/org/freedesktop/DBus",
3314 "org.freedesktop.DBus",
3316 get_name_owner_handler
,
3321 int unit_watch_bus_name(Unit
*u
, const char *name
) {
3327 /* Watch a specific name on the bus. We only support one unit
3328 * watching each name for now. */
3330 if (u
->manager
->api_bus
) {
3331 /* If the bus is already available, install the match directly.
3332 * Otherwise, just put the name in the list. bus_setup_api() will take care later. */
3333 r
= unit_install_bus_match(u
, u
->manager
->api_bus
, name
);
3335 return log_warning_errno(r
, "Failed to subscribe to NameOwnerChanged signal for '%s': %m", name
);
3338 r
= hashmap_put(u
->manager
->watch_bus
, name
, u
);
3340 u
->match_bus_slot
= sd_bus_slot_unref(u
->match_bus_slot
);
3341 return log_warning_errno(r
, "Failed to put bus name to hashmap: %m");
3347 void unit_unwatch_bus_name(Unit
*u
, const char *name
) {
3351 (void) hashmap_remove_value(u
->manager
->watch_bus
, name
, u
);
3352 u
->match_bus_slot
= sd_bus_slot_unref(u
->match_bus_slot
);
3353 u
->get_name_owner_slot
= sd_bus_slot_unref(u
->get_name_owner_slot
);
3356 bool unit_can_serialize(Unit
*u
) {
3359 return UNIT_VTABLE(u
)->serialize
&& UNIT_VTABLE(u
)->deserialize_item
;
3362 static int serialize_cgroup_mask(FILE *f
, const char *key
, CGroupMask mask
) {
3363 _cleanup_free_
char *s
= NULL
;
3372 r
= cg_mask_to_string(mask
, &s
);
3374 return log_error_errno(r
, "Failed to format cgroup mask: %m");
3376 return serialize_item(f
, key
, s
);
3379 static const char *const ip_accounting_metric_field
[_CGROUP_IP_ACCOUNTING_METRIC_MAX
] = {
3380 [CGROUP_IP_INGRESS_BYTES
] = "ip-accounting-ingress-bytes",
3381 [CGROUP_IP_INGRESS_PACKETS
] = "ip-accounting-ingress-packets",
3382 [CGROUP_IP_EGRESS_BYTES
] = "ip-accounting-egress-bytes",
3383 [CGROUP_IP_EGRESS_PACKETS
] = "ip-accounting-egress-packets",
3386 static const char *const io_accounting_metric_field_base
[_CGROUP_IO_ACCOUNTING_METRIC_MAX
] = {
3387 [CGROUP_IO_READ_BYTES
] = "io-accounting-read-bytes-base",
3388 [CGROUP_IO_WRITE_BYTES
] = "io-accounting-write-bytes-base",
3389 [CGROUP_IO_READ_OPERATIONS
] = "io-accounting-read-operations-base",
3390 [CGROUP_IO_WRITE_OPERATIONS
] = "io-accounting-write-operations-base",
3393 static const char *const io_accounting_metric_field_last
[_CGROUP_IO_ACCOUNTING_METRIC_MAX
] = {
3394 [CGROUP_IO_READ_BYTES
] = "io-accounting-read-bytes-last",
3395 [CGROUP_IO_WRITE_BYTES
] = "io-accounting-write-bytes-last",
3396 [CGROUP_IO_READ_OPERATIONS
] = "io-accounting-read-operations-last",
3397 [CGROUP_IO_WRITE_OPERATIONS
] = "io-accounting-write-operations-last",
3400 int unit_serialize(Unit
*u
, FILE *f
, FDSet
*fds
, bool serialize_jobs
) {
3401 CGroupIPAccountingMetric m
;
3408 if (unit_can_serialize(u
)) {
3409 r
= UNIT_VTABLE(u
)->serialize(u
, f
, fds
);
3414 (void) serialize_dual_timestamp(f
, "state-change-timestamp", &u
->state_change_timestamp
);
3416 (void) serialize_dual_timestamp(f
, "inactive-exit-timestamp", &u
->inactive_exit_timestamp
);
3417 (void) serialize_dual_timestamp(f
, "active-enter-timestamp", &u
->active_enter_timestamp
);
3418 (void) serialize_dual_timestamp(f
, "active-exit-timestamp", &u
->active_exit_timestamp
);
3419 (void) serialize_dual_timestamp(f
, "inactive-enter-timestamp", &u
->inactive_enter_timestamp
);
3421 (void) serialize_dual_timestamp(f
, "condition-timestamp", &u
->condition_timestamp
);
3422 (void) serialize_dual_timestamp(f
, "assert-timestamp", &u
->assert_timestamp
);
3424 if (dual_timestamp_is_set(&u
->condition_timestamp
))
3425 (void) serialize_bool(f
, "condition-result", u
->condition_result
);
3427 if (dual_timestamp_is_set(&u
->assert_timestamp
))
3428 (void) serialize_bool(f
, "assert-result", u
->assert_result
);
3430 (void) serialize_bool(f
, "transient", u
->transient
);
3431 (void) serialize_bool(f
, "in-audit", u
->in_audit
);
3433 (void) serialize_bool(f
, "exported-invocation-id", u
->exported_invocation_id
);
3434 (void) serialize_bool(f
, "exported-log-level-max", u
->exported_log_level_max
);
3435 (void) serialize_bool(f
, "exported-log-extra-fields", u
->exported_log_extra_fields
);
3436 (void) serialize_bool(f
, "exported-log-rate-limit-interval", u
->exported_log_rate_limit_interval
);
3437 (void) serialize_bool(f
, "exported-log-rate-limit-burst", u
->exported_log_rate_limit_burst
);
3439 (void) serialize_item_format(f
, "cpu-usage-base", "%" PRIu64
, u
->cpu_usage_base
);
3440 if (u
->cpu_usage_last
!= NSEC_INFINITY
)
3441 (void) serialize_item_format(f
, "cpu-usage-last", "%" PRIu64
, u
->cpu_usage_last
);
3443 if (u
->oom_kill_last
> 0)
3444 (void) serialize_item_format(f
, "oom-kill-last", "%" PRIu64
, u
->oom_kill_last
);
3446 for (CGroupIOAccountingMetric im
= 0; im
< _CGROUP_IO_ACCOUNTING_METRIC_MAX
; im
++) {
3447 (void) serialize_item_format(f
, io_accounting_metric_field_base
[im
], "%" PRIu64
, u
->io_accounting_base
[im
]);
3449 if (u
->io_accounting_last
[im
] != UINT64_MAX
)
3450 (void) serialize_item_format(f
, io_accounting_metric_field_last
[im
], "%" PRIu64
, u
->io_accounting_last
[im
]);
3454 (void) serialize_item(f
, "cgroup", u
->cgroup_path
);
3456 (void) serialize_bool(f
, "cgroup-realized", u
->cgroup_realized
);
3457 (void) serialize_cgroup_mask(f
, "cgroup-realized-mask", u
->cgroup_realized_mask
);
3458 (void) serialize_cgroup_mask(f
, "cgroup-enabled-mask", u
->cgroup_enabled_mask
);
3459 (void) serialize_cgroup_mask(f
, "cgroup-invalidated-mask", u
->cgroup_invalidated_mask
);
3461 if (uid_is_valid(u
->ref_uid
))
3462 (void) serialize_item_format(f
, "ref-uid", UID_FMT
, u
->ref_uid
);
3463 if (gid_is_valid(u
->ref_gid
))
3464 (void) serialize_item_format(f
, "ref-gid", GID_FMT
, u
->ref_gid
);
3466 if (!sd_id128_is_null(u
->invocation_id
))
3467 (void) serialize_item_format(f
, "invocation-id", SD_ID128_FORMAT_STR
, SD_ID128_FORMAT_VAL(u
->invocation_id
));
3469 bus_track_serialize(u
->bus_track
, f
, "ref");
3471 for (m
= 0; m
< _CGROUP_IP_ACCOUNTING_METRIC_MAX
; m
++) {
3474 r
= unit_get_ip_accounting(u
, m
, &v
);
3476 (void) serialize_item_format(f
, ip_accounting_metric_field
[m
], "%" PRIu64
, v
);
3479 if (serialize_jobs
) {
3482 job_serialize(u
->job
, f
);
3487 job_serialize(u
->nop_job
, f
);
3496 static int unit_deserialize_job(Unit
*u
, FILE *f
) {
3497 _cleanup_(job_freep
) Job
*j
= NULL
;
3507 r
= job_deserialize(j
, f
);
3511 r
= job_install_deserialized(j
);
3519 int unit_deserialize(Unit
*u
, FILE *f
, FDSet
*fds
) {
3527 _cleanup_free_
char *line
= NULL
;
3532 r
= read_line(f
, LONG_LINE_MAX
, &line
);
3534 return log_error_errno(r
, "Failed to read serialization line: %m");
3535 if (r
== 0) /* eof */
3539 if (isempty(l
)) /* End marker */
3542 k
= strcspn(l
, "=");
3550 if (streq(l
, "job")) {
3552 /* New-style serialized job */
3553 r
= unit_deserialize_job(u
, f
);
3556 } else /* Legacy for pre-44 */
3557 log_unit_warning(u
, "Update from too old systemd versions are unsupported, cannot deserialize job: %s", v
);
3559 } else if (streq(l
, "state-change-timestamp")) {
3560 (void) deserialize_dual_timestamp(v
, &u
->state_change_timestamp
);
3562 } else if (streq(l
, "inactive-exit-timestamp")) {
3563 (void) deserialize_dual_timestamp(v
, &u
->inactive_exit_timestamp
);
3565 } else if (streq(l
, "active-enter-timestamp")) {
3566 (void) deserialize_dual_timestamp(v
, &u
->active_enter_timestamp
);
3568 } else if (streq(l
, "active-exit-timestamp")) {
3569 (void) deserialize_dual_timestamp(v
, &u
->active_exit_timestamp
);
3571 } else if (streq(l
, "inactive-enter-timestamp")) {
3572 (void) deserialize_dual_timestamp(v
, &u
->inactive_enter_timestamp
);
3574 } else if (streq(l
, "condition-timestamp")) {
3575 (void) deserialize_dual_timestamp(v
, &u
->condition_timestamp
);
3577 } else if (streq(l
, "assert-timestamp")) {
3578 (void) deserialize_dual_timestamp(v
, &u
->assert_timestamp
);
3580 } else if (streq(l
, "condition-result")) {
3582 r
= parse_boolean(v
);
3584 log_unit_debug(u
, "Failed to parse condition result value %s, ignoring.", v
);
3586 u
->condition_result
= r
;
3590 } else if (streq(l
, "assert-result")) {
3592 r
= parse_boolean(v
);
3594 log_unit_debug(u
, "Failed to parse assert result value %s, ignoring.", v
);
3596 u
->assert_result
= r
;
3600 } else if (streq(l
, "transient")) {
3602 r
= parse_boolean(v
);
3604 log_unit_debug(u
, "Failed to parse transient bool %s, ignoring.", v
);
3610 } else if (streq(l
, "in-audit")) {
3612 r
= parse_boolean(v
);
3614 log_unit_debug(u
, "Failed to parse in-audit bool %s, ignoring.", v
);
3620 } else if (streq(l
, "exported-invocation-id")) {
3622 r
= parse_boolean(v
);
3624 log_unit_debug(u
, "Failed to parse exported invocation ID bool %s, ignoring.", v
);
3626 u
->exported_invocation_id
= r
;
3630 } else if (streq(l
, "exported-log-level-max")) {
3632 r
= parse_boolean(v
);
3634 log_unit_debug(u
, "Failed to parse exported log level max bool %s, ignoring.", v
);
3636 u
->exported_log_level_max
= r
;
3640 } else if (streq(l
, "exported-log-extra-fields")) {
3642 r
= parse_boolean(v
);
3644 log_unit_debug(u
, "Failed to parse exported log extra fields bool %s, ignoring.", v
);
3646 u
->exported_log_extra_fields
= r
;
3650 } else if (streq(l
, "exported-log-rate-limit-interval")) {
3652 r
= parse_boolean(v
);
3654 log_unit_debug(u
, "Failed to parse exported log rate limit interval %s, ignoring.", v
);
3656 u
->exported_log_rate_limit_interval
= r
;
3660 } else if (streq(l
, "exported-log-rate-limit-burst")) {
3662 r
= parse_boolean(v
);
3664 log_unit_debug(u
, "Failed to parse exported log rate limit burst %s, ignoring.", v
);
3666 u
->exported_log_rate_limit_burst
= r
;
3670 } else if (STR_IN_SET(l
, "cpu-usage-base", "cpuacct-usage-base")) {
3672 r
= safe_atou64(v
, &u
->cpu_usage_base
);
3674 log_unit_debug(u
, "Failed to parse CPU usage base %s, ignoring.", v
);
3678 } else if (streq(l
, "cpu-usage-last")) {
3680 r
= safe_atou64(v
, &u
->cpu_usage_last
);
3682 log_unit_debug(u
, "Failed to read CPU usage last %s, ignoring.", v
);
3686 } else if (streq(l
, "oom-kill-last")) {
3688 r
= safe_atou64(v
, &u
->oom_kill_last
);
3690 log_unit_debug(u
, "Failed to read OOM kill last %s, ignoring.", v
);
3694 } else if (streq(l
, "cgroup")) {
3696 r
= unit_set_cgroup_path(u
, v
);
3698 log_unit_debug_errno(u
, r
, "Failed to set cgroup path %s, ignoring: %m", v
);
3700 (void) unit_watch_cgroup(u
);
3701 (void) unit_watch_cgroup_memory(u
);
3704 } else if (streq(l
, "cgroup-realized")) {
3707 b
= parse_boolean(v
);
3709 log_unit_debug(u
, "Failed to parse cgroup-realized bool %s, ignoring.", v
);
3711 u
->cgroup_realized
= b
;
3715 } else if (streq(l
, "cgroup-realized-mask")) {
3717 r
= cg_mask_from_string(v
, &u
->cgroup_realized_mask
);
3719 log_unit_debug(u
, "Failed to parse cgroup-realized-mask %s, ignoring.", v
);
3722 } else if (streq(l
, "cgroup-enabled-mask")) {
3724 r
= cg_mask_from_string(v
, &u
->cgroup_enabled_mask
);
3726 log_unit_debug(u
, "Failed to parse cgroup-enabled-mask %s, ignoring.", v
);
3729 } else if (streq(l
, "cgroup-invalidated-mask")) {
3731 r
= cg_mask_from_string(v
, &u
->cgroup_invalidated_mask
);
3733 log_unit_debug(u
, "Failed to parse cgroup-invalidated-mask %s, ignoring.", v
);
3736 } else if (streq(l
, "ref-uid")) {
3739 r
= parse_uid(v
, &uid
);
3741 log_unit_debug(u
, "Failed to parse referenced UID %s, ignoring.", v
);
3743 unit_ref_uid_gid(u
, uid
, GID_INVALID
);
3747 } else if (streq(l
, "ref-gid")) {
3750 r
= parse_gid(v
, &gid
);
3752 log_unit_debug(u
, "Failed to parse referenced GID %s, ignoring.", v
);
3754 unit_ref_uid_gid(u
, UID_INVALID
, gid
);
3758 } else if (streq(l
, "ref")) {
3760 r
= strv_extend(&u
->deserialized_refs
, v
);
3765 } else if (streq(l
, "invocation-id")) {
3768 r
= sd_id128_from_string(v
, &id
);
3770 log_unit_debug(u
, "Failed to parse invocation id %s, ignoring.", v
);
3772 r
= unit_set_invocation_id(u
, id
);
3774 log_unit_warning_errno(u
, r
, "Failed to set invocation ID for unit: %m");
3780 /* Check if this is an IP accounting metric serialization field */
3781 m
= string_table_lookup(ip_accounting_metric_field
, ELEMENTSOF(ip_accounting_metric_field
), l
);
3785 r
= safe_atou64(v
, &c
);
3787 log_unit_debug(u
, "Failed to parse IP accounting value %s, ignoring.", v
);
3789 u
->ip_accounting_extra
[m
] = c
;
3793 m
= string_table_lookup(io_accounting_metric_field_base
, ELEMENTSOF(io_accounting_metric_field_base
), l
);
3797 r
= safe_atou64(v
, &c
);
3799 log_unit_debug(u
, "Failed to parse IO accounting base value %s, ignoring.", v
);
3801 u
->io_accounting_base
[m
] = c
;
3805 m
= string_table_lookup(io_accounting_metric_field_last
, ELEMENTSOF(io_accounting_metric_field_last
), l
);
3809 r
= safe_atou64(v
, &c
);
3811 log_unit_debug(u
, "Failed to parse IO accounting last value %s, ignoring.", v
);
3813 u
->io_accounting_last
[m
] = c
;
3817 if (unit_can_serialize(u
)) {
3818 r
= exec_runtime_deserialize_compat(u
, l
, v
, fds
);
3820 log_unit_warning(u
, "Failed to deserialize runtime parameter '%s', ignoring.", l
);
3824 /* Returns positive if key was handled by the call */
3828 r
= UNIT_VTABLE(u
)->deserialize_item(u
, l
, v
, fds
);
3830 log_unit_warning(u
, "Failed to deserialize unit parameter '%s', ignoring.", l
);
3834 /* Versions before 228 did not carry a state change timestamp. In this case, take the current time. This is
3835 * useful, so that timeouts based on this timestamp don't trigger too early, and is in-line with the logic from
3836 * before 228 where the base for timeouts was not persistent across reboots. */
3838 if (!dual_timestamp_is_set(&u
->state_change_timestamp
))
3839 dual_timestamp_get(&u
->state_change_timestamp
);
3841 /* Let's make sure that everything that is deserialized also gets any potential new cgroup settings applied
3842 * after we are done. For that we invalidate anything already realized, so that we can realize it again. */
3843 unit_invalidate_cgroup(u
, _CGROUP_MASK_ALL
);
3844 unit_invalidate_cgroup_bpf(u
);
3849 int unit_deserialize_skip(FILE *f
) {
3853 /* Skip serialized data for this unit. We don't know what it is. */
3856 _cleanup_free_
char *line
= NULL
;
3859 r
= read_line(f
, LONG_LINE_MAX
, &line
);
3861 return log_error_errno(r
, "Failed to read serialization line: %m");
3873 int unit_add_node_dependency(Unit
*u
, const char *what
, bool wants
, UnitDependency dep
, UnitDependencyMask mask
) {
3875 _cleanup_free_
char *e
= NULL
;
3880 /* Adds in links to the device node that this unit is based on */
3884 if (!is_device_path(what
))
3887 /* When device units aren't supported (such as in a
3888 * container), don't create dependencies on them. */
3889 if (!unit_type_supported(UNIT_DEVICE
))
3892 r
= unit_name_from_path(what
, ".device", &e
);
3896 r
= manager_load_unit(u
->manager
, e
, NULL
, NULL
, &device
);
3900 if (dep
== UNIT_REQUIRES
&& device_shall_be_bound_by(device
, u
))
3901 dep
= UNIT_BINDS_TO
;
3903 r
= unit_add_two_dependencies(u
, UNIT_AFTER
,
3904 MANAGER_IS_SYSTEM(u
->manager
) ? dep
: UNIT_WANTS
,
3905 device
, true, mask
);
3910 r
= unit_add_dependency(device
, UNIT_WANTS
, u
, false, mask
);
3918 int unit_coldplug(Unit
*u
) {
3924 /* Make sure we don't enter a loop, when coldplugging recursively. */
3928 u
->coldplugged
= true;
3930 STRV_FOREACH(i
, u
->deserialized_refs
) {
3931 q
= bus_unit_track_add_name(u
, *i
);
3932 if (q
< 0 && r
>= 0)
3935 u
->deserialized_refs
= strv_free(u
->deserialized_refs
);
3937 if (UNIT_VTABLE(u
)->coldplug
) {
3938 q
= UNIT_VTABLE(u
)->coldplug(u
);
3939 if (q
< 0 && r
>= 0)
3944 q
= job_coldplug(u
->job
);
3945 if (q
< 0 && r
>= 0)
3952 void unit_catchup(Unit
*u
) {
3955 if (UNIT_VTABLE(u
)->catchup
)
3956 UNIT_VTABLE(u
)->catchup(u
);
3959 static bool fragment_mtime_newer(const char *path
, usec_t mtime
, bool path_masked
) {
3965 /* If the source is some virtual kernel file system, then we assume we watch it anyway, and hence pretend we
3966 * are never out-of-date. */
3967 if (PATH_STARTSWITH_SET(path
, "/proc", "/sys"))
3970 if (stat(path
, &st
) < 0)
3971 /* What, cannot access this anymore? */
3975 /* For masked files check if they are still so */
3976 return !null_or_empty(&st
);
3978 /* For non-empty files check the mtime */
3979 return timespec_load(&st
.st_mtim
) > mtime
;
3984 bool unit_need_daemon_reload(Unit
*u
) {
3985 _cleanup_strv_free_
char **t
= NULL
;
3990 /* For unit files, we allow masking… */
3991 if (fragment_mtime_newer(u
->fragment_path
, u
->fragment_mtime
,
3992 u
->load_state
== UNIT_MASKED
))
3995 /* Source paths should not be masked… */
3996 if (fragment_mtime_newer(u
->source_path
, u
->source_mtime
, false))
3999 if (u
->load_state
== UNIT_LOADED
)
4000 (void) unit_find_dropin_paths(u
, &t
);
4001 if (!strv_equal(u
->dropin_paths
, t
))
4004 /* … any drop-ins that are masked are simply omitted from the list. */
4005 STRV_FOREACH(path
, u
->dropin_paths
)
4006 if (fragment_mtime_newer(*path
, u
->dropin_mtime
, false))
4012 void unit_reset_failed(Unit
*u
) {
4015 if (UNIT_VTABLE(u
)->reset_failed
)
4016 UNIT_VTABLE(u
)->reset_failed(u
);
4018 RATELIMIT_RESET(u
->start_limit
);
4019 u
->start_limit_hit
= false;
4022 Unit
*unit_following(Unit
*u
) {
4025 if (UNIT_VTABLE(u
)->following
)
4026 return UNIT_VTABLE(u
)->following(u
);
4031 bool unit_stop_pending(Unit
*u
) {
4034 /* This call does check the current state of the unit. It's
4035 * hence useful to be called from state change calls of the
4036 * unit itself, where the state isn't updated yet. This is
4037 * different from unit_inactive_or_pending() which checks both
4038 * the current state and for a queued job. */
4040 return u
->job
&& u
->job
->type
== JOB_STOP
;
4043 bool unit_inactive_or_pending(Unit
*u
) {
4046 /* Returns true if the unit is inactive or going down */
4048 if (UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(u
)))
4051 if (unit_stop_pending(u
))
4057 bool unit_active_or_pending(Unit
*u
) {
4060 /* Returns true if the unit is active or going up */
4062 if (UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(u
)))
4066 IN_SET(u
->job
->type
, JOB_START
, JOB_RELOAD_OR_START
, JOB_RESTART
))
4072 bool unit_will_restart(Unit
*u
) {
4075 if (!UNIT_VTABLE(u
)->will_restart
)
4078 return UNIT_VTABLE(u
)->will_restart(u
);
4081 int unit_kill(Unit
*u
, KillWho w
, int signo
, sd_bus_error
*error
) {
4083 assert(w
>= 0 && w
< _KILL_WHO_MAX
);
4084 assert(SIGNAL_VALID(signo
));
4086 if (!UNIT_VTABLE(u
)->kill
)
4089 return UNIT_VTABLE(u
)->kill(u
, w
, signo
, error
);
4092 static Set
*unit_pid_set(pid_t main_pid
, pid_t control_pid
) {
4093 _cleanup_set_free_ Set
*pid_set
= NULL
;
4096 pid_set
= set_new(NULL
);
4100 /* Exclude the main/control pids from being killed via the cgroup */
4102 r
= set_put(pid_set
, PID_TO_PTR(main_pid
));
4107 if (control_pid
> 0) {
4108 r
= set_put(pid_set
, PID_TO_PTR(control_pid
));
4113 return TAKE_PTR(pid_set
);
4116 int unit_kill_common(
4122 sd_bus_error
*error
) {
4125 bool killed
= false;
4127 if (IN_SET(who
, KILL_MAIN
, KILL_MAIN_FAIL
)) {
4129 return sd_bus_error_setf(error
, BUS_ERROR_NO_SUCH_PROCESS
, "%s units have no main processes", unit_type_to_string(u
->type
));
4130 else if (main_pid
== 0)
4131 return sd_bus_error_set_const(error
, BUS_ERROR_NO_SUCH_PROCESS
, "No main process to kill");
4134 if (IN_SET(who
, KILL_CONTROL
, KILL_CONTROL_FAIL
)) {
4135 if (control_pid
< 0)
4136 return sd_bus_error_setf(error
, BUS_ERROR_NO_SUCH_PROCESS
, "%s units have no control processes", unit_type_to_string(u
->type
));
4137 else if (control_pid
== 0)
4138 return sd_bus_error_set_const(error
, BUS_ERROR_NO_SUCH_PROCESS
, "No control process to kill");
4141 if (IN_SET(who
, KILL_CONTROL
, KILL_CONTROL_FAIL
, KILL_ALL
, KILL_ALL_FAIL
))
4142 if (control_pid
> 0) {
4143 if (kill(control_pid
, signo
) < 0)
4149 if (IN_SET(who
, KILL_MAIN
, KILL_MAIN_FAIL
, KILL_ALL
, KILL_ALL_FAIL
))
4151 if (kill(main_pid
, signo
) < 0)
4157 if (IN_SET(who
, KILL_ALL
, KILL_ALL_FAIL
) && u
->cgroup_path
) {
4158 _cleanup_set_free_ Set
*pid_set
= NULL
;
4161 /* Exclude the main/control pids from being killed via the cgroup */
4162 pid_set
= unit_pid_set(main_pid
, control_pid
);
4166 q
= cg_kill_recursive(SYSTEMD_CGROUP_CONTROLLER
, u
->cgroup_path
, signo
, 0, pid_set
, NULL
, NULL
);
4167 if (q
< 0 && !IN_SET(q
, -EAGAIN
, -ESRCH
, -ENOENT
))
4173 if (r
== 0 && !killed
&& IN_SET(who
, KILL_ALL_FAIL
, KILL_CONTROL_FAIL
))
4179 int unit_following_set(Unit
*u
, Set
**s
) {
4183 if (UNIT_VTABLE(u
)->following_set
)
4184 return UNIT_VTABLE(u
)->following_set(u
, s
);
4190 UnitFileState
unit_get_unit_file_state(Unit
*u
) {
4195 if (u
->unit_file_state
< 0 && u
->fragment_path
) {
4196 r
= unit_file_get_state(
4197 u
->manager
->unit_file_scope
,
4200 &u
->unit_file_state
);
4202 u
->unit_file_state
= UNIT_FILE_BAD
;
4205 return u
->unit_file_state
;
4208 int unit_get_unit_file_preset(Unit
*u
) {
4211 if (u
->unit_file_preset
< 0 && u
->fragment_path
)
4212 u
->unit_file_preset
= unit_file_query_preset(
4213 u
->manager
->unit_file_scope
,
4215 basename(u
->fragment_path
));
4217 return u
->unit_file_preset
;
4220 Unit
* unit_ref_set(UnitRef
*ref
, Unit
*source
, Unit
*target
) {
4226 unit_ref_unset(ref
);
4228 ref
->source
= source
;
4229 ref
->target
= target
;
4230 LIST_PREPEND(refs_by_target
, target
->refs_by_target
, ref
);
4234 void unit_ref_unset(UnitRef
*ref
) {
4240 /* We are about to drop a reference to the unit, make sure the garbage collection has a look at it as it might
4241 * be unreferenced now. */
4242 unit_add_to_gc_queue(ref
->target
);
4244 LIST_REMOVE(refs_by_target
, ref
->target
->refs_by_target
, ref
);
4245 ref
->source
= ref
->target
= NULL
;
4248 static int user_from_unit_name(Unit
*u
, char **ret
) {
4250 static const uint8_t hash_key
[] = {
4251 0x58, 0x1a, 0xaf, 0xe6, 0x28, 0x58, 0x4e, 0x96,
4252 0xb4, 0x4e, 0xf5, 0x3b, 0x8c, 0x92, 0x07, 0xec
4255 _cleanup_free_
char *n
= NULL
;
4258 r
= unit_name_to_prefix(u
->id
, &n
);
4262 if (valid_user_group_name(n
)) {
4267 /* If we can't use the unit name as a user name, then let's hash it and use that */
4268 if (asprintf(ret
, "_du%016" PRIx64
, siphash24(n
, strlen(n
), hash_key
)) < 0)
4274 int unit_patch_contexts(Unit
*u
) {
4282 /* Patch in the manager defaults into the exec and cgroup
4283 * contexts, _after_ the rest of the settings have been
4286 ec
= unit_get_exec_context(u
);
4288 /* This only copies in the ones that need memory */
4289 for (i
= 0; i
< _RLIMIT_MAX
; i
++)
4290 if (u
->manager
->rlimit
[i
] && !ec
->rlimit
[i
]) {
4291 ec
->rlimit
[i
] = newdup(struct rlimit
, u
->manager
->rlimit
[i
], 1);
4296 if (MANAGER_IS_USER(u
->manager
) &&
4297 !ec
->working_directory
) {
4299 r
= get_home_dir(&ec
->working_directory
);
4303 /* Allow user services to run, even if the
4304 * home directory is missing */
4305 ec
->working_directory_missing_ok
= true;
4308 if (ec
->private_devices
)
4309 ec
->capability_bounding_set
&= ~((UINT64_C(1) << CAP_MKNOD
) | (UINT64_C(1) << CAP_SYS_RAWIO
));
4311 if (ec
->protect_kernel_modules
)
4312 ec
->capability_bounding_set
&= ~(UINT64_C(1) << CAP_SYS_MODULE
);
4314 if (ec
->dynamic_user
) {
4316 r
= user_from_unit_name(u
, &ec
->user
);
4322 ec
->group
= strdup(ec
->user
);
4327 /* If the dynamic user option is on, let's make sure that the unit can't leave its
4328 * UID/GID around in the file system or on IPC objects. Hence enforce a strict
4331 ec
->private_tmp
= true;
4332 ec
->remove_ipc
= true;
4333 ec
->protect_system
= PROTECT_SYSTEM_STRICT
;
4334 if (ec
->protect_home
== PROTECT_HOME_NO
)
4335 ec
->protect_home
= PROTECT_HOME_READ_ONLY
;
4337 /* Make sure this service can neither benefit from SUID/SGID binaries nor create
4339 ec
->no_new_privileges
= true;
4340 ec
->restrict_suid_sgid
= true;
4344 cc
= unit_get_cgroup_context(u
);
4347 if (ec
->private_devices
&&
4348 cc
->device_policy
== CGROUP_AUTO
)
4349 cc
->device_policy
= CGROUP_CLOSED
;
4351 if (ec
->root_image
&&
4352 (cc
->device_policy
!= CGROUP_AUTO
|| cc
->device_allow
)) {
4354 /* When RootImage= is specified, the following devices are touched. */
4355 r
= cgroup_add_device_allow(cc
, "/dev/loop-control", "rw");
4359 r
= cgroup_add_device_allow(cc
, "block-loop", "rwm");
4363 r
= cgroup_add_device_allow(cc
, "block-blkext", "rwm");
4372 ExecContext
*unit_get_exec_context(Unit
*u
) {
4379 offset
= UNIT_VTABLE(u
)->exec_context_offset
;
4383 return (ExecContext
*) ((uint8_t*) u
+ offset
);
4386 KillContext
*unit_get_kill_context(Unit
*u
) {
4393 offset
= UNIT_VTABLE(u
)->kill_context_offset
;
4397 return (KillContext
*) ((uint8_t*) u
+ offset
);
4400 CGroupContext
*unit_get_cgroup_context(Unit
*u
) {
4406 offset
= UNIT_VTABLE(u
)->cgroup_context_offset
;
4410 return (CGroupContext
*) ((uint8_t*) u
+ offset
);
4413 ExecRuntime
*unit_get_exec_runtime(Unit
*u
) {
4419 offset
= UNIT_VTABLE(u
)->exec_runtime_offset
;
4423 return *(ExecRuntime
**) ((uint8_t*) u
+ offset
);
4426 static const char* unit_drop_in_dir(Unit
*u
, UnitWriteFlags flags
) {
4429 if (UNIT_WRITE_FLAGS_NOOP(flags
))
4432 if (u
->transient
) /* Redirect drop-ins for transient units always into the transient directory. */
4433 return u
->manager
->lookup_paths
.transient
;
4435 if (flags
& UNIT_PERSISTENT
)
4436 return u
->manager
->lookup_paths
.persistent_control
;
4438 if (flags
& UNIT_RUNTIME
)
4439 return u
->manager
->lookup_paths
.runtime_control
;
4444 char* unit_escape_setting(const char *s
, UnitWriteFlags flags
, char **buf
) {
4450 /* Escapes the input string as requested. Returns the escaped string. If 'buf' is specified then the allocated
4451 * return buffer pointer is also written to *buf, except if no escaping was necessary, in which case *buf is
4452 * set to NULL, and the input pointer is returned as-is. This means the return value always contains a properly
4453 * escaped version, but *buf when passed only contains a pointer if an allocation was necessary. If *buf is
4454 * not specified, then the return value always needs to be freed. Callers can use this to optimize memory
4457 if (flags
& UNIT_ESCAPE_SPECIFIERS
) {
4458 ret
= specifier_escape(s
);
4465 if (flags
& UNIT_ESCAPE_C
) {
4478 return ret
?: (char*) s
;
4481 return ret
?: strdup(s
);
4484 char* unit_concat_strv(char **l
, UnitWriteFlags flags
) {
4485 _cleanup_free_
char *result
= NULL
;
4486 size_t n
= 0, allocated
= 0;
4489 /* Takes a list of strings, escapes them, and concatenates them. This may be used to format command lines in a
4490 * way suitable for ExecStart= stanzas */
4492 STRV_FOREACH(i
, l
) {
4493 _cleanup_free_
char *buf
= NULL
;
4498 p
= unit_escape_setting(*i
, flags
, &buf
);
4502 a
= (n
> 0) + 1 + strlen(p
) + 1; /* separating space + " + entry + " */
4503 if (!GREEDY_REALLOC(result
, allocated
, n
+ a
+ 1))
4517 if (!GREEDY_REALLOC(result
, allocated
, n
+ 1))
4522 return TAKE_PTR(result
);
4525 int unit_write_setting(Unit
*u
, UnitWriteFlags flags
, const char *name
, const char *data
) {
4526 _cleanup_free_
char *p
= NULL
, *q
= NULL
, *escaped
= NULL
;
4527 const char *dir
, *wrapped
;
4534 if (UNIT_WRITE_FLAGS_NOOP(flags
))
4537 data
= unit_escape_setting(data
, flags
, &escaped
);
4541 /* Prefix the section header. If we are writing this out as transient file, then let's suppress this if the
4542 * previous section header is the same */
4544 if (flags
& UNIT_PRIVATE
) {
4545 if (!UNIT_VTABLE(u
)->private_section
)
4548 if (!u
->transient_file
|| u
->last_section_private
< 0)
4549 data
= strjoina("[", UNIT_VTABLE(u
)->private_section
, "]\n", data
);
4550 else if (u
->last_section_private
== 0)
4551 data
= strjoina("\n[", UNIT_VTABLE(u
)->private_section
, "]\n", data
);
4553 if (!u
->transient_file
|| u
->last_section_private
< 0)
4554 data
= strjoina("[Unit]\n", data
);
4555 else if (u
->last_section_private
> 0)
4556 data
= strjoina("\n[Unit]\n", data
);
4559 if (u
->transient_file
) {
4560 /* When this is a transient unit file in creation, then let's not create a new drop-in but instead
4561 * write to the transient unit file. */
4562 fputs(data
, u
->transient_file
);
4564 if (!endswith(data
, "\n"))
4565 fputc('\n', u
->transient_file
);
4567 /* Remember which section we wrote this entry to */
4568 u
->last_section_private
= !!(flags
& UNIT_PRIVATE
);
4572 dir
= unit_drop_in_dir(u
, flags
);
4576 wrapped
= strjoina("# This is a drop-in unit file extension, created via \"systemctl set-property\"\n"
4577 "# or an equivalent operation. Do not edit.\n",
4581 r
= drop_in_file(dir
, u
->id
, 50, name
, &p
, &q
);
4585 (void) mkdir_p_label(p
, 0755);
4586 r
= write_string_file_atomic_label(q
, wrapped
);
4590 r
= strv_push(&u
->dropin_paths
, q
);
4595 strv_uniq(u
->dropin_paths
);
4597 u
->dropin_mtime
= now(CLOCK_REALTIME
);
4602 int unit_write_settingf(Unit
*u
, UnitWriteFlags flags
, const char *name
, const char *format
, ...) {
4603 _cleanup_free_
char *p
= NULL
;
4611 if (UNIT_WRITE_FLAGS_NOOP(flags
))
4614 va_start(ap
, format
);
4615 r
= vasprintf(&p
, format
, ap
);
4621 return unit_write_setting(u
, flags
, name
, p
);
4624 int unit_make_transient(Unit
*u
) {
4625 _cleanup_free_
char *path
= NULL
;
4630 if (!UNIT_VTABLE(u
)->can_transient
)
4633 (void) mkdir_p_label(u
->manager
->lookup_paths
.transient
, 0755);
4635 path
= path_join(u
->manager
->lookup_paths
.transient
, u
->id
);
4639 /* Let's open the file we'll write the transient settings into. This file is kept open as long as we are
4640 * creating the transient, and is closed in unit_load(), as soon as we start loading the file. */
4642 RUN_WITH_UMASK(0022) {
4643 f
= fopen(path
, "we");
4648 safe_fclose(u
->transient_file
);
4649 u
->transient_file
= f
;
4651 free_and_replace(u
->fragment_path
, path
);
4653 u
->source_path
= mfree(u
->source_path
);
4654 u
->dropin_paths
= strv_free(u
->dropin_paths
);
4655 u
->fragment_mtime
= u
->source_mtime
= u
->dropin_mtime
= 0;
4657 u
->load_state
= UNIT_STUB
;
4659 u
->transient
= true;
4661 unit_add_to_dbus_queue(u
);
4662 unit_add_to_gc_queue(u
);
4664 fputs("# This is a transient unit file, created programmatically via the systemd API. Do not edit.\n",
4670 static int log_kill(pid_t pid
, int sig
, void *userdata
) {
4671 _cleanup_free_
char *comm
= NULL
;
4673 (void) get_process_comm(pid
, &comm
);
4675 /* Don't log about processes marked with brackets, under the assumption that these are temporary processes
4676 only, like for example systemd's own PAM stub process. */
4677 if (comm
&& comm
[0] == '(')
4680 log_unit_notice(userdata
,
4681 "Killing process " PID_FMT
" (%s) with signal SIG%s.",
4684 signal_to_string(sig
));
4689 static int operation_to_signal(KillContext
*c
, KillOperation k
) {
4694 case KILL_TERMINATE
:
4695 case KILL_TERMINATE_AND_LOG
:
4696 return c
->kill_signal
;
4699 return c
->final_kill_signal
;
4702 return c
->watchdog_signal
;
4705 assert_not_reached("KillOperation unknown");
4709 int unit_kill_context(
4715 bool main_pid_alien
) {
4717 bool wait_for_exit
= false, send_sighup
;
4718 cg_kill_log_func_t log_func
= NULL
;
4724 /* Kill the processes belonging to this unit, in preparation for shutting the unit down.
4725 * Returns > 0 if we killed something worth waiting for, 0 otherwise. */
4727 if (c
->kill_mode
== KILL_NONE
)
4730 sig
= operation_to_signal(c
, k
);
4734 IN_SET(k
, KILL_TERMINATE
, KILL_TERMINATE_AND_LOG
) &&
4737 if (k
!= KILL_TERMINATE
|| IN_SET(sig
, SIGKILL
, SIGABRT
))
4738 log_func
= log_kill
;
4742 log_func(main_pid
, sig
, u
);
4744 r
= kill_and_sigcont(main_pid
, sig
);
4745 if (r
< 0 && r
!= -ESRCH
) {
4746 _cleanup_free_
char *comm
= NULL
;
4747 (void) get_process_comm(main_pid
, &comm
);
4749 log_unit_warning_errno(u
, r
, "Failed to kill main process " PID_FMT
" (%s), ignoring: %m", main_pid
, strna(comm
));
4751 if (!main_pid_alien
)
4752 wait_for_exit
= true;
4754 if (r
!= -ESRCH
&& send_sighup
)
4755 (void) kill(main_pid
, SIGHUP
);
4759 if (control_pid
> 0) {
4761 log_func(control_pid
, sig
, u
);
4763 r
= kill_and_sigcont(control_pid
, sig
);
4764 if (r
< 0 && r
!= -ESRCH
) {
4765 _cleanup_free_
char *comm
= NULL
;
4766 (void) get_process_comm(control_pid
, &comm
);
4768 log_unit_warning_errno(u
, r
, "Failed to kill control process " PID_FMT
" (%s), ignoring: %m", control_pid
, strna(comm
));
4770 wait_for_exit
= true;
4772 if (r
!= -ESRCH
&& send_sighup
)
4773 (void) kill(control_pid
, SIGHUP
);
4777 if (u
->cgroup_path
&&
4778 (c
->kill_mode
== KILL_CONTROL_GROUP
|| (c
->kill_mode
== KILL_MIXED
&& k
== KILL_KILL
))) {
4779 _cleanup_set_free_ Set
*pid_set
= NULL
;
4781 /* Exclude the main/control pids from being killed via the cgroup */
4782 pid_set
= unit_pid_set(main_pid
, control_pid
);
4786 r
= cg_kill_recursive(SYSTEMD_CGROUP_CONTROLLER
, u
->cgroup_path
,
4788 CGROUP_SIGCONT
|CGROUP_IGNORE_SELF
,
4792 if (!IN_SET(r
, -EAGAIN
, -ESRCH
, -ENOENT
))
4793 log_unit_warning_errno(u
, r
, "Failed to kill control group %s, ignoring: %m", u
->cgroup_path
);
4797 /* FIXME: For now, on the legacy hierarchy, we will not wait for the cgroup members to die if
4798 * we are running in a container or if this is a delegation unit, simply because cgroup
4799 * notification is unreliable in these cases. It doesn't work at all in containers, and outside
4800 * of containers it can be confused easily by left-over directories in the cgroup — which
4801 * however should not exist in non-delegated units. On the unified hierarchy that's different,
4802 * there we get proper events. Hence rely on them. */
4804 if (cg_unified_controller(SYSTEMD_CGROUP_CONTROLLER
) > 0 ||
4805 (detect_container() == 0 && !unit_cgroup_delegate(u
)))
4806 wait_for_exit
= true;
4811 pid_set
= unit_pid_set(main_pid
, control_pid
);
4815 cg_kill_recursive(SYSTEMD_CGROUP_CONTROLLER
, u
->cgroup_path
,
4824 return wait_for_exit
;
4827 int unit_require_mounts_for(Unit
*u
, const char *path
, UnitDependencyMask mask
) {
4828 _cleanup_free_
char *p
= NULL
;
4829 UnitDependencyInfo di
;
4835 /* Registers a unit for requiring a certain path and all its prefixes. We keep a hashtable of these paths in
4836 * the unit (from the path to the UnitDependencyInfo structure indicating how to the dependency came to
4837 * be). However, we build a prefix table for all possible prefixes so that new appearing mount units can easily
4838 * determine which units to make themselves a dependency of. */
4840 if (!path_is_absolute(path
))
4843 r
= hashmap_ensure_allocated(&u
->requires_mounts_for
, &path_hash_ops
);
4851 path
= path_simplify(p
, true);
4853 if (!path_is_normalized(path
))
4856 if (hashmap_contains(u
->requires_mounts_for
, path
))
4859 di
= (UnitDependencyInfo
) {
4863 r
= hashmap_put(u
->requires_mounts_for
, path
, di
.data
);
4868 char prefix
[strlen(path
) + 1];
4869 PATH_FOREACH_PREFIX_MORE(prefix
, path
) {
4872 x
= hashmap_get(u
->manager
->units_requiring_mounts_for
, prefix
);
4874 _cleanup_free_
char *q
= NULL
;
4876 r
= hashmap_ensure_allocated(&u
->manager
->units_requiring_mounts_for
, &path_hash_ops
);
4888 r
= hashmap_put(u
->manager
->units_requiring_mounts_for
, q
, x
);
4904 int unit_setup_exec_runtime(Unit
*u
) {
4912 offset
= UNIT_VTABLE(u
)->exec_runtime_offset
;
4915 /* Check if there already is an ExecRuntime for this unit? */
4916 rt
= (ExecRuntime
**) ((uint8_t*) u
+ offset
);
4920 /* Try to get it from somebody else */
4921 HASHMAP_FOREACH_KEY(v
, other
, u
->dependencies
[UNIT_JOINS_NAMESPACE_OF
], i
) {
4922 r
= exec_runtime_acquire(u
->manager
, NULL
, other
->id
, false, rt
);
4927 return exec_runtime_acquire(u
->manager
, unit_get_exec_context(u
), u
->id
, true, rt
);
4930 int unit_setup_dynamic_creds(Unit
*u
) {
4932 DynamicCreds
*dcreds
;
4937 offset
= UNIT_VTABLE(u
)->dynamic_creds_offset
;
4939 dcreds
= (DynamicCreds
*) ((uint8_t*) u
+ offset
);
4941 ec
= unit_get_exec_context(u
);
4944 if (!ec
->dynamic_user
)
4947 return dynamic_creds_acquire(dcreds
, u
->manager
, ec
->user
, ec
->group
);
4950 bool unit_type_supported(UnitType t
) {
4951 if (_unlikely_(t
< 0))
4953 if (_unlikely_(t
>= _UNIT_TYPE_MAX
))
4956 if (!unit_vtable
[t
]->supported
)
4959 return unit_vtable
[t
]->supported();
4962 void unit_warn_if_dir_nonempty(Unit
*u
, const char* where
) {
4968 r
= dir_is_empty(where
);
4969 if (r
> 0 || r
== -ENOTDIR
)
4972 log_unit_warning_errno(u
, r
, "Failed to check directory %s: %m", where
);
4976 log_struct(LOG_NOTICE
,
4977 "MESSAGE_ID=" SD_MESSAGE_OVERMOUNTING_STR
,
4979 LOG_UNIT_INVOCATION_ID(u
),
4980 LOG_UNIT_MESSAGE(u
, "Directory %s to mount over is not empty, mounting anyway.", where
),
4984 int unit_fail_if_noncanonical(Unit
*u
, const char* where
) {
4985 _cleanup_free_
char *canonical_where
= NULL
;
4991 r
= chase_symlinks(where
, NULL
, CHASE_NONEXISTENT
, &canonical_where
);
4993 log_unit_debug_errno(u
, r
, "Failed to check %s for symlinks, ignoring: %m", where
);
4997 /* We will happily ignore a trailing slash (or any redundant slashes) */
4998 if (path_equal(where
, canonical_where
))
5001 /* No need to mention "." or "..", they would already have been rejected by unit_name_from_path() */
5003 "MESSAGE_ID=" SD_MESSAGE_OVERMOUNTING_STR
,
5005 LOG_UNIT_INVOCATION_ID(u
),
5006 LOG_UNIT_MESSAGE(u
, "Mount path %s is not canonical (contains a symlink).", where
),
5012 bool unit_is_pristine(Unit
*u
) {
5015 /* Check if the unit already exists or is already around,
5016 * in a number of different ways. Note that to cater for unit
5017 * types such as slice, we are generally fine with units that
5018 * are marked UNIT_LOADED even though nothing was actually
5019 * loaded, as those unit types don't require a file on disk. */
5021 return !(!IN_SET(u
->load_state
, UNIT_NOT_FOUND
, UNIT_LOADED
) ||
5024 !strv_isempty(u
->dropin_paths
) ||
5029 pid_t
unit_control_pid(Unit
*u
) {
5032 if (UNIT_VTABLE(u
)->control_pid
)
5033 return UNIT_VTABLE(u
)->control_pid(u
);
5038 pid_t
unit_main_pid(Unit
*u
) {
5041 if (UNIT_VTABLE(u
)->main_pid
)
5042 return UNIT_VTABLE(u
)->main_pid(u
);
5047 static void unit_unref_uid_internal(
5051 void (*_manager_unref_uid
)(Manager
*m
, uid_t uid
, bool destroy_now
)) {
5055 assert(_manager_unref_uid
);
5057 /* Generic implementation of both unit_unref_uid() and unit_unref_gid(), under the assumption that uid_t and
5058 * gid_t are actually the same time, with the same validity rules.
5060 * Drops a reference to UID/GID from a unit. */
5062 assert_cc(sizeof(uid_t
) == sizeof(gid_t
));
5063 assert_cc(UID_INVALID
== (uid_t
) GID_INVALID
);
5065 if (!uid_is_valid(*ref_uid
))
5068 _manager_unref_uid(u
->manager
, *ref_uid
, destroy_now
);
5069 *ref_uid
= UID_INVALID
;
5072 void unit_unref_uid(Unit
*u
, bool destroy_now
) {
5073 unit_unref_uid_internal(u
, &u
->ref_uid
, destroy_now
, manager_unref_uid
);
5076 void unit_unref_gid(Unit
*u
, bool destroy_now
) {
5077 unit_unref_uid_internal(u
, (uid_t
*) &u
->ref_gid
, destroy_now
, manager_unref_gid
);
5080 static int unit_ref_uid_internal(
5085 int (*_manager_ref_uid
)(Manager
*m
, uid_t uid
, bool clean_ipc
)) {
5091 assert(uid_is_valid(uid
));
5092 assert(_manager_ref_uid
);
5094 /* Generic implementation of both unit_ref_uid() and unit_ref_guid(), under the assumption that uid_t and gid_t
5095 * are actually the same type, and have the same validity rules.
5097 * Adds a reference on a specific UID/GID to this unit. Each unit referencing the same UID/GID maintains a
5098 * reference so that we can destroy the UID/GID's IPC resources as soon as this is requested and the counter
5101 assert_cc(sizeof(uid_t
) == sizeof(gid_t
));
5102 assert_cc(UID_INVALID
== (uid_t
) GID_INVALID
);
5104 if (*ref_uid
== uid
)
5107 if (uid_is_valid(*ref_uid
)) /* Already set? */
5110 r
= _manager_ref_uid(u
->manager
, uid
, clean_ipc
);
5118 int unit_ref_uid(Unit
*u
, uid_t uid
, bool clean_ipc
) {
5119 return unit_ref_uid_internal(u
, &u
->ref_uid
, uid
, clean_ipc
, manager_ref_uid
);
5122 int unit_ref_gid(Unit
*u
, gid_t gid
, bool clean_ipc
) {
5123 return unit_ref_uid_internal(u
, (uid_t
*) &u
->ref_gid
, (uid_t
) gid
, clean_ipc
, manager_ref_gid
);
5126 static int unit_ref_uid_gid_internal(Unit
*u
, uid_t uid
, gid_t gid
, bool clean_ipc
) {
5131 /* Reference both a UID and a GID in one go. Either references both, or neither. */
5133 if (uid_is_valid(uid
)) {
5134 r
= unit_ref_uid(u
, uid
, clean_ipc
);
5139 if (gid_is_valid(gid
)) {
5140 q
= unit_ref_gid(u
, gid
, clean_ipc
);
5143 unit_unref_uid(u
, false);
5149 return r
> 0 || q
> 0;
5152 int unit_ref_uid_gid(Unit
*u
, uid_t uid
, gid_t gid
) {
5158 c
= unit_get_exec_context(u
);
5160 r
= unit_ref_uid_gid_internal(u
, uid
, gid
, c
? c
->remove_ipc
: false);
5162 return log_unit_warning_errno(u
, r
, "Couldn't add UID/GID reference to unit, proceeding without: %m");
5167 void unit_unref_uid_gid(Unit
*u
, bool destroy_now
) {
5170 unit_unref_uid(u
, destroy_now
);
5171 unit_unref_gid(u
, destroy_now
);
5174 void unit_notify_user_lookup(Unit
*u
, uid_t uid
, gid_t gid
) {
5179 /* This is invoked whenever one of the forked off processes let's us know the UID/GID its user name/group names
5180 * resolved to. We keep track of which UID/GID is currently assigned in order to be able to destroy its IPC
5181 * objects when no service references the UID/GID anymore. */
5183 r
= unit_ref_uid_gid(u
, uid
, gid
);
5185 unit_add_to_dbus_queue(u
);
5188 int unit_set_invocation_id(Unit
*u
, sd_id128_t id
) {
5193 /* Set the invocation ID for this unit. If we cannot, this will not roll back, but reset the whole thing. */
5195 if (sd_id128_equal(u
->invocation_id
, id
))
5198 if (!sd_id128_is_null(u
->invocation_id
))
5199 (void) hashmap_remove_value(u
->manager
->units_by_invocation_id
, &u
->invocation_id
, u
);
5201 if (sd_id128_is_null(id
)) {
5206 r
= hashmap_ensure_allocated(&u
->manager
->units_by_invocation_id
, &id128_hash_ops
);
5210 u
->invocation_id
= id
;
5211 sd_id128_to_string(id
, u
->invocation_id_string
);
5213 r
= hashmap_put(u
->manager
->units_by_invocation_id
, &u
->invocation_id
, u
);
5220 u
->invocation_id
= SD_ID128_NULL
;
5221 u
->invocation_id_string
[0] = 0;
5225 int unit_acquire_invocation_id(Unit
*u
) {
5231 r
= sd_id128_randomize(&id
);
5233 return log_unit_error_errno(u
, r
, "Failed to generate invocation ID for unit: %m");
5235 r
= unit_set_invocation_id(u
, id
);
5237 return log_unit_error_errno(u
, r
, "Failed to set invocation ID for unit: %m");
5239 unit_add_to_dbus_queue(u
);
5243 int unit_set_exec_params(Unit
*u
, ExecParameters
*p
) {
5249 /* Copy parameters from manager */
5250 r
= manager_get_effective_environment(u
->manager
, &p
->environment
);
5254 p
->confirm_spawn
= manager_get_confirm_spawn(u
->manager
);
5255 p
->cgroup_supported
= u
->manager
->cgroup_supported
;
5256 p
->prefix
= u
->manager
->prefix
;
5257 SET_FLAG(p
->flags
, EXEC_PASS_LOG_UNIT
|EXEC_CHOWN_DIRECTORIES
, MANAGER_IS_SYSTEM(u
->manager
));
5259 /* Copy parameters from unit */
5260 p
->cgroup_path
= u
->cgroup_path
;
5261 SET_FLAG(p
->flags
, EXEC_CGROUP_DELEGATE
, unit_cgroup_delegate(u
));
5266 int unit_fork_helper_process(Unit
*u
, const char *name
, pid_t
*ret
) {
5272 /* Forks off a helper process and makes sure it is a member of the unit's cgroup. Returns == 0 in the child,
5273 * and > 0 in the parent. The pid parameter is always filled in with the child's PID. */
5275 (void) unit_realize_cgroup(u
);
5277 r
= safe_fork(name
, FORK_REOPEN_LOG
, ret
);
5281 (void) default_signals(SIGNALS_CRASH_HANDLER
, SIGNALS_IGNORE
, -1);
5282 (void) ignore_signals(SIGPIPE
, -1);
5284 (void) prctl(PR_SET_PDEATHSIG
, SIGTERM
);
5286 if (u
->cgroup_path
) {
5287 r
= cg_attach_everywhere(u
->manager
->cgroup_supported
, u
->cgroup_path
, 0, NULL
, NULL
);
5289 log_unit_error_errno(u
, r
, "Failed to join unit cgroup %s: %m", u
->cgroup_path
);
5297 static void unit_update_dependency_mask(Unit
*u
, UnitDependency d
, Unit
*other
, UnitDependencyInfo di
) {
5300 assert(d
< _UNIT_DEPENDENCY_MAX
);
5303 if (di
.origin_mask
== 0 && di
.destination_mask
== 0) {
5304 /* No bit set anymore, let's drop the whole entry */
5305 assert_se(hashmap_remove(u
->dependencies
[d
], other
));
5306 log_unit_debug(u
, "%s lost dependency %s=%s", u
->id
, unit_dependency_to_string(d
), other
->id
);
5308 /* Mask was reduced, let's update the entry */
5309 assert_se(hashmap_update(u
->dependencies
[d
], other
, di
.data
) == 0);
5312 void unit_remove_dependencies(Unit
*u
, UnitDependencyMask mask
) {
5317 /* Removes all dependencies u has on other units marked for ownership by 'mask'. */
5322 for (d
= 0; d
< _UNIT_DEPENDENCY_MAX
; d
++) {
5326 UnitDependencyInfo di
;
5332 HASHMAP_FOREACH_KEY(di
.data
, other
, u
->dependencies
[d
], i
) {
5335 if ((di
.origin_mask
& ~mask
) == di
.origin_mask
)
5337 di
.origin_mask
&= ~mask
;
5338 unit_update_dependency_mask(u
, d
, other
, di
);
5340 /* We updated the dependency from our unit to the other unit now. But most dependencies
5341 * imply a reverse dependency. Hence, let's delete that one too. For that we go through
5342 * all dependency types on the other unit and delete all those which point to us and
5343 * have the right mask set. */
5345 for (q
= 0; q
< _UNIT_DEPENDENCY_MAX
; q
++) {
5346 UnitDependencyInfo dj
;
5348 dj
.data
= hashmap_get(other
->dependencies
[q
], u
);
5349 if ((dj
.destination_mask
& ~mask
) == dj
.destination_mask
)
5351 dj
.destination_mask
&= ~mask
;
5353 unit_update_dependency_mask(other
, q
, u
, dj
);
5356 unit_add_to_gc_queue(other
);
5366 static int unit_export_invocation_id(Unit
*u
) {
5372 if (u
->exported_invocation_id
)
5375 if (sd_id128_is_null(u
->invocation_id
))
5378 p
= strjoina("/run/systemd/units/invocation:", u
->id
);
5379 r
= symlink_atomic(u
->invocation_id_string
, p
);
5381 return log_unit_debug_errno(u
, r
, "Failed to create invocation ID symlink %s: %m", p
);
5383 u
->exported_invocation_id
= true;
5387 static int unit_export_log_level_max(Unit
*u
, const ExecContext
*c
) {
5395 if (u
->exported_log_level_max
)
5398 if (c
->log_level_max
< 0)
5401 assert(c
->log_level_max
<= 7);
5403 buf
[0] = '0' + c
->log_level_max
;
5406 p
= strjoina("/run/systemd/units/log-level-max:", u
->id
);
5407 r
= symlink_atomic(buf
, p
);
5409 return log_unit_debug_errno(u
, r
, "Failed to create maximum log level symlink %s: %m", p
);
5411 u
->exported_log_level_max
= true;
5415 static int unit_export_log_extra_fields(Unit
*u
, const ExecContext
*c
) {
5416 _cleanup_close_
int fd
= -1;
5417 struct iovec
*iovec
;
5425 if (u
->exported_log_extra_fields
)
5428 if (c
->n_log_extra_fields
<= 0)
5431 sizes
= newa(le64_t
, c
->n_log_extra_fields
);
5432 iovec
= newa(struct iovec
, c
->n_log_extra_fields
* 2);
5434 for (i
= 0; i
< c
->n_log_extra_fields
; i
++) {
5435 sizes
[i
] = htole64(c
->log_extra_fields
[i
].iov_len
);
5437 iovec
[i
*2] = IOVEC_MAKE(sizes
+ i
, sizeof(le64_t
));
5438 iovec
[i
*2+1] = c
->log_extra_fields
[i
];
5441 p
= strjoina("/run/systemd/units/log-extra-fields:", u
->id
);
5442 pattern
= strjoina(p
, ".XXXXXX");
5444 fd
= mkostemp_safe(pattern
);
5446 return log_unit_debug_errno(u
, fd
, "Failed to create extra fields file %s: %m", p
);
5448 n
= writev(fd
, iovec
, c
->n_log_extra_fields
*2);
5450 r
= log_unit_debug_errno(u
, errno
, "Failed to write extra fields: %m");
5454 (void) fchmod(fd
, 0644);
5456 if (rename(pattern
, p
) < 0) {
5457 r
= log_unit_debug_errno(u
, errno
, "Failed to rename extra fields file: %m");
5461 u
->exported_log_extra_fields
= true;
5465 (void) unlink(pattern
);
5469 static int unit_export_log_rate_limit_interval(Unit
*u
, const ExecContext
*c
) {
5470 _cleanup_free_
char *buf
= NULL
;
5477 if (u
->exported_log_rate_limit_interval
)
5480 if (c
->log_rate_limit_interval_usec
== 0)
5483 p
= strjoina("/run/systemd/units/log-rate-limit-interval:", u
->id
);
5485 if (asprintf(&buf
, "%" PRIu64
, c
->log_rate_limit_interval_usec
) < 0)
5488 r
= symlink_atomic(buf
, p
);
5490 return log_unit_debug_errno(u
, r
, "Failed to create log rate limit interval symlink %s: %m", p
);
5492 u
->exported_log_rate_limit_interval
= true;
5496 static int unit_export_log_rate_limit_burst(Unit
*u
, const ExecContext
*c
) {
5497 _cleanup_free_
char *buf
= NULL
;
5504 if (u
->exported_log_rate_limit_burst
)
5507 if (c
->log_rate_limit_burst
== 0)
5510 p
= strjoina("/run/systemd/units/log-rate-limit-burst:", u
->id
);
5512 if (asprintf(&buf
, "%u", c
->log_rate_limit_burst
) < 0)
5515 r
= symlink_atomic(buf
, p
);
5517 return log_unit_debug_errno(u
, r
, "Failed to create log rate limit burst symlink %s: %m", p
);
5519 u
->exported_log_rate_limit_burst
= true;
5523 void unit_export_state_files(Unit
*u
) {
5524 const ExecContext
*c
;
5531 if (!MANAGER_IS_SYSTEM(u
->manager
))
5534 if (MANAGER_IS_TEST_RUN(u
->manager
))
5537 /* Exports a couple of unit properties to /run/systemd/units/, so that journald can quickly query this data
5538 * from there. Ideally, journald would use IPC to query this, like everybody else, but that's hard, as long as
5539 * the IPC system itself and PID 1 also log to the journal.
5541 * Note that these files really shouldn't be considered API for anyone else, as use a runtime file system as
5542 * IPC replacement is not compatible with today's world of file system namespaces. However, this doesn't really
5543 * apply to communication between the journal and systemd, as we assume that these two daemons live in the same
5544 * namespace at least.
5546 * Note that some of the "files" exported here are actually symlinks and not regular files. Symlinks work
5547 * better for storing small bits of data, in particular as we can write them with two system calls, and read
5550 (void) unit_export_invocation_id(u
);
5552 c
= unit_get_exec_context(u
);
5554 (void) unit_export_log_level_max(u
, c
);
5555 (void) unit_export_log_extra_fields(u
, c
);
5556 (void) unit_export_log_rate_limit_interval(u
, c
);
5557 (void) unit_export_log_rate_limit_burst(u
, c
);
5561 void unit_unlink_state_files(Unit
*u
) {
5569 if (!MANAGER_IS_SYSTEM(u
->manager
))
5572 /* Undoes the effect of unit_export_state() */
5574 if (u
->exported_invocation_id
) {
5575 p
= strjoina("/run/systemd/units/invocation:", u
->id
);
5578 u
->exported_invocation_id
= false;
5581 if (u
->exported_log_level_max
) {
5582 p
= strjoina("/run/systemd/units/log-level-max:", u
->id
);
5585 u
->exported_log_level_max
= false;
5588 if (u
->exported_log_extra_fields
) {
5589 p
= strjoina("/run/systemd/units/extra-fields:", u
->id
);
5592 u
->exported_log_extra_fields
= false;
5595 if (u
->exported_log_rate_limit_interval
) {
5596 p
= strjoina("/run/systemd/units/log-rate-limit-interval:", u
->id
);
5599 u
->exported_log_rate_limit_interval
= false;
5602 if (u
->exported_log_rate_limit_burst
) {
5603 p
= strjoina("/run/systemd/units/log-rate-limit-burst:", u
->id
);
5606 u
->exported_log_rate_limit_burst
= false;
5610 int unit_prepare_exec(Unit
*u
) {
5615 /* Load any custom firewall BPF programs here once to test if they are existing and actually loadable.
5616 * Fail here early since later errors in the call chain unit_realize_cgroup to cgroup_context_apply are ignored. */
5617 r
= bpf_firewall_load_custom(u
);
5621 /* Prepares everything so that we can fork of a process for this unit */
5623 (void) unit_realize_cgroup(u
);
5625 if (u
->reset_accounting
) {
5626 (void) unit_reset_accounting(u
);
5627 u
->reset_accounting
= false;
5630 unit_export_state_files(u
);
5632 r
= unit_setup_exec_runtime(u
);
5636 r
= unit_setup_dynamic_creds(u
);
5643 static int log_leftover(pid_t pid
, int sig
, void *userdata
) {
5644 _cleanup_free_
char *comm
= NULL
;
5646 (void) get_process_comm(pid
, &comm
);
5648 if (comm
&& comm
[0] == '(') /* Most likely our own helper process (PAM?), ignore */
5651 log_unit_warning(userdata
,
5652 "Found left-over process " PID_FMT
" (%s) in control group while starting unit. Ignoring.\n"
5653 "This usually indicates unclean termination of a previous run, or service implementation deficiencies.",
5659 int unit_warn_leftover_processes(Unit
*u
) {
5662 (void) unit_pick_cgroup_path(u
);
5664 if (!u
->cgroup_path
)
5667 return cg_kill_recursive(SYSTEMD_CGROUP_CONTROLLER
, u
->cgroup_path
, 0, 0, NULL
, log_leftover
, u
);
5670 bool unit_needs_console(Unit
*u
) {
5672 UnitActiveState state
;
5676 state
= unit_active_state(u
);
5678 if (UNIT_IS_INACTIVE_OR_FAILED(state
))
5681 if (UNIT_VTABLE(u
)->needs_console
)
5682 return UNIT_VTABLE(u
)->needs_console(u
);
5684 /* If this unit type doesn't implement this call, let's use a generic fallback implementation: */
5685 ec
= unit_get_exec_context(u
);
5689 return exec_context_may_touch_console(ec
);
5692 const char *unit_label_path(Unit
*u
) {
5695 /* Returns the file system path to use for MAC access decisions, i.e. the file to read the SELinux label off
5696 * when validating access checks. */
5698 p
= u
->source_path
?: u
->fragment_path
;
5702 /* If a unit is masked, then don't read the SELinux label of /dev/null, as that really makes no sense */
5703 if (path_equal(p
, "/dev/null"))
5709 int unit_pid_attachable(Unit
*u
, pid_t pid
, sd_bus_error
*error
) {
5714 /* Checks whether the specified PID is generally good for attaching, i.e. a valid PID, not our manager itself,
5715 * and not a kernel thread either */
5717 /* First, a simple range check */
5718 if (!pid_is_valid(pid
))
5719 return sd_bus_error_setf(error
, SD_BUS_ERROR_INVALID_ARGS
, "Process identifier " PID_FMT
" is not valid.", pid
);
5721 /* Some extra safety check */
5722 if (pid
== 1 || pid
== getpid_cached())
5723 return sd_bus_error_setf(error
, SD_BUS_ERROR_INVALID_ARGS
, "Process " PID_FMT
" is a manager process, refusing.", pid
);
5725 /* Don't even begin to bother with kernel threads */
5726 r
= is_kernel_thread(pid
);
5728 return sd_bus_error_setf(error
, SD_BUS_ERROR_UNIX_PROCESS_ID_UNKNOWN
, "Process with ID " PID_FMT
" does not exist.", pid
);
5730 return sd_bus_error_set_errnof(error
, r
, "Failed to determine whether process " PID_FMT
" is a kernel thread: %m", pid
);
5732 return sd_bus_error_setf(error
, SD_BUS_ERROR_INVALID_ARGS
, "Process " PID_FMT
" is a kernel thread, refusing.", pid
);
5737 void unit_log_success(Unit
*u
) {
5740 log_struct(LOG_INFO
,
5741 "MESSAGE_ID=" SD_MESSAGE_UNIT_SUCCESS_STR
,
5743 LOG_UNIT_INVOCATION_ID(u
),
5744 LOG_UNIT_MESSAGE(u
, "Succeeded."));
5747 void unit_log_failure(Unit
*u
, const char *result
) {
5751 log_struct(LOG_WARNING
,
5752 "MESSAGE_ID=" SD_MESSAGE_UNIT_FAILURE_RESULT_STR
,
5754 LOG_UNIT_INVOCATION_ID(u
),
5755 LOG_UNIT_MESSAGE(u
, "Failed with result '%s'.", result
),
5756 "UNIT_RESULT=%s", result
);
5759 void unit_log_skip(Unit
*u
, const char *result
) {
5763 log_struct(LOG_INFO
,
5764 "MESSAGE_ID=" SD_MESSAGE_UNIT_SKIPPED_STR
,
5766 LOG_UNIT_INVOCATION_ID(u
),
5767 LOG_UNIT_MESSAGE(u
, "Skipped due to '%s'.", result
),
5768 "UNIT_RESULT=%s", result
);
5771 void unit_log_process_exit(
5775 const char *command
,
5782 if (code
!= CLD_EXITED
)
5783 level
= LOG_WARNING
;
5786 "MESSAGE_ID=" SD_MESSAGE_UNIT_PROCESS_EXIT_STR
,
5787 LOG_UNIT_MESSAGE(u
, "%s exited, code=%s, status=%i/%s",
5789 sigchld_code_to_string(code
), status
,
5790 strna(code
== CLD_EXITED
5791 ? exit_status_to_string(status
, EXIT_STATUS_FULL
)
5792 : signal_to_string(status
))),
5793 "EXIT_CODE=%s", sigchld_code_to_string(code
),
5794 "EXIT_STATUS=%i", status
,
5795 "COMMAND=%s", strna(command
),
5797 LOG_UNIT_INVOCATION_ID(u
));
5800 int unit_exit_status(Unit
*u
) {
5803 /* Returns the exit status to propagate for the most recent cycle of this unit. Returns a value in the range
5804 * 0…255 if there's something to propagate. EOPNOTSUPP if the concept does not apply to this unit type, ENODATA
5805 * if no data is currently known (for example because the unit hasn't deactivated yet) and EBADE if the main
5806 * service process has exited abnormally (signal/coredump). */
5808 if (!UNIT_VTABLE(u
)->exit_status
)
5811 return UNIT_VTABLE(u
)->exit_status(u
);
5814 int unit_failure_action_exit_status(Unit
*u
) {
5819 /* Returns the exit status to propagate on failure, or an error if there's nothing to propagate */
5821 if (u
->failure_action_exit_status
>= 0)
5822 return u
->failure_action_exit_status
;
5824 r
= unit_exit_status(u
);
5825 if (r
== -EBADE
) /* Exited, but not cleanly (i.e. by signal or such) */
5831 int unit_success_action_exit_status(Unit
*u
) {
5836 /* Returns the exit status to propagate on success, or an error if there's nothing to propagate */
5838 if (u
->success_action_exit_status
>= 0)
5839 return u
->success_action_exit_status
;
5841 r
= unit_exit_status(u
);
5842 if (r
== -EBADE
) /* Exited, but not cleanly (i.e. by signal or such) */
5848 int unit_test_trigger_loaded(Unit
*u
) {
5851 /* Tests whether the unit to trigger is loaded */
5853 trigger
= UNIT_TRIGGER(u
);
5855 return log_unit_error_errno(u
, SYNTHETIC_ERRNO(ENOENT
),
5856 "Refusing to start, no unit to trigger.");
5857 if (trigger
->load_state
!= UNIT_LOADED
)
5858 return log_unit_error_errno(u
, SYNTHETIC_ERRNO(ENOENT
),
5859 "Refusing to start, unit %s to trigger not loaded.", trigger
->id
);
5864 int unit_clean(Unit
*u
, ExecCleanMask mask
) {
5865 UnitActiveState state
;
5869 /* Special return values:
5871 * -EOPNOTSUPP → cleaning not supported for this unit type
5872 * -EUNATCH → cleaning not defined for this resource type
5873 * -EBUSY → unit currently can't be cleaned since it's running or not properly loaded, or has
5874 * a job queued or similar
5877 if (!UNIT_VTABLE(u
)->clean
)
5883 if (u
->load_state
!= UNIT_LOADED
)
5889 state
= unit_active_state(u
);
5890 if (!IN_SET(state
, UNIT_INACTIVE
))
5893 return UNIT_VTABLE(u
)->clean(u
, mask
);
5896 int unit_can_clean(Unit
*u
, ExecCleanMask
*ret
) {
5899 if (!UNIT_VTABLE(u
)->clean
||
5900 u
->load_state
!= UNIT_LOADED
) {
5905 /* When the clean() method is set, can_clean() really should be set too */
5906 assert(UNIT_VTABLE(u
)->can_clean
);
5908 return UNIT_VTABLE(u
)->can_clean(u
, ret
);
5911 static const char* const collect_mode_table
[_COLLECT_MODE_MAX
] = {
5912 [COLLECT_INACTIVE
] = "inactive",
5913 [COLLECT_INACTIVE_OR_FAILED
] = "inactive-or-failed",
5916 DEFINE_STRING_TABLE_LOOKUP(collect_mode
, CollectMode
);