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
;
1757 /* If this is already started, then this will succeed. Note that this will even succeed if this unit
1758 * is not startable by the user. This is relied on to detect when we need to wait for units and when
1759 * waiting is finished. */
1760 state
= unit_active_state(u
);
1761 if (UNIT_IS_ACTIVE_OR_RELOADING(state
))
1763 if (state
== UNIT_MAINTENANCE
)
1766 /* Units that aren't loaded cannot be started */
1767 if (u
->load_state
!= UNIT_LOADED
)
1770 /* Refuse starting scope units more than once */
1771 if (UNIT_VTABLE(u
)->once_only
&& dual_timestamp_is_set(&u
->inactive_enter_timestamp
))
1774 /* If the conditions failed, don't do anything at all. If we already are activating this call might
1775 * still be useful to speed up activation in case there is some hold-off time, but we don't want to
1776 * recheck the condition in that case. */
1777 if (state
!= UNIT_ACTIVATING
&&
1778 !unit_test_condition(u
))
1779 return log_unit_debug_errno(u
, SYNTHETIC_ERRNO(ECOMM
), "Starting requested but condition failed. Not starting unit.");
1781 /* If the asserts failed, fail the entire job */
1782 if (state
!= UNIT_ACTIVATING
&&
1783 !unit_test_assert(u
))
1784 return log_unit_notice_errno(u
, SYNTHETIC_ERRNO(EPROTO
), "Starting requested but asserts failed.");
1786 /* Units of types that aren't supported cannot be started. Note that we do this test only after the
1787 * condition checks, so that we rather return condition check errors (which are usually not
1788 * considered a true failure) than "not supported" errors (which are considered a failure).
1790 if (!unit_type_supported(u
->type
))
1793 /* Let's make sure that the deps really are in order before we start this. Normally the job engine
1794 * should have taken care of this already, but let's check this here again. After all, our
1795 * dependencies might not be in effect anymore, due to a reload or due to a failed condition. */
1796 if (!unit_verify_deps(u
))
1799 /* Forward to the main object, if we aren't it. */
1800 following
= unit_following(u
);
1802 log_unit_debug(u
, "Redirecting start request from %s to %s.", u
->id
, following
->id
);
1803 return unit_start(following
);
1806 /* If it is stopped, but we cannot start it, then fail */
1807 if (!UNIT_VTABLE(u
)->start
)
1810 /* We don't suppress calls to ->start() here when we are already starting, to allow this request to
1811 * be used as a "hurry up" call, for example when the unit is in some "auto restart" state where it
1812 * waits for a holdoff timer to elapse before it will start again. */
1814 unit_add_to_dbus_queue(u
);
1816 return UNIT_VTABLE(u
)->start(u
);
1819 bool unit_can_start(Unit
*u
) {
1822 if (u
->load_state
!= UNIT_LOADED
)
1825 if (!unit_type_supported(u
->type
))
1828 /* Scope units may be started only once */
1829 if (UNIT_VTABLE(u
)->once_only
&& dual_timestamp_is_set(&u
->inactive_exit_timestamp
))
1832 return !!UNIT_VTABLE(u
)->start
;
1835 bool unit_can_isolate(Unit
*u
) {
1838 return unit_can_start(u
) &&
1843 * -EBADR: This unit type does not support stopping.
1844 * -EALREADY: Unit is already stopped.
1845 * -EAGAIN: An operation is already in progress. Retry later.
1847 int unit_stop(Unit
*u
) {
1848 UnitActiveState state
;
1853 state
= unit_active_state(u
);
1854 if (UNIT_IS_INACTIVE_OR_FAILED(state
))
1857 following
= unit_following(u
);
1859 log_unit_debug(u
, "Redirecting stop request from %s to %s.", u
->id
, following
->id
);
1860 return unit_stop(following
);
1863 if (!UNIT_VTABLE(u
)->stop
)
1866 unit_add_to_dbus_queue(u
);
1868 return UNIT_VTABLE(u
)->stop(u
);
1871 bool unit_can_stop(Unit
*u
) {
1874 if (!unit_type_supported(u
->type
))
1880 return !!UNIT_VTABLE(u
)->stop
;
1884 * -EBADR: This unit type does not support reloading.
1885 * -ENOEXEC: Unit is not started.
1886 * -EAGAIN: An operation is already in progress. Retry later.
1888 int unit_reload(Unit
*u
) {
1889 UnitActiveState state
;
1894 if (u
->load_state
!= UNIT_LOADED
)
1897 if (!unit_can_reload(u
))
1900 state
= unit_active_state(u
);
1901 if (state
== UNIT_RELOADING
)
1904 if (state
!= UNIT_ACTIVE
) {
1905 log_unit_warning(u
, "Unit cannot be reloaded because it is inactive.");
1909 following
= unit_following(u
);
1911 log_unit_debug(u
, "Redirecting reload request from %s to %s.", u
->id
, following
->id
);
1912 return unit_reload(following
);
1915 unit_add_to_dbus_queue(u
);
1917 if (!UNIT_VTABLE(u
)->reload
) {
1918 /* Unit doesn't have a reload function, but we need to propagate the reload anyway */
1919 unit_notify(u
, unit_active_state(u
), unit_active_state(u
), 0);
1923 return UNIT_VTABLE(u
)->reload(u
);
1926 bool unit_can_reload(Unit
*u
) {
1929 if (UNIT_VTABLE(u
)->can_reload
)
1930 return UNIT_VTABLE(u
)->can_reload(u
);
1932 if (!hashmap_isempty(u
->dependencies
[UNIT_PROPAGATES_RELOAD_TO
]))
1935 return UNIT_VTABLE(u
)->reload
;
1938 bool unit_is_unneeded(Unit
*u
) {
1939 static const UnitDependency deps
[] = {
1949 if (!u
->stop_when_unneeded
)
1952 /* Don't clean up while the unit is transitioning or is even inactive. */
1953 if (!UNIT_IS_ACTIVE_OR_RELOADING(unit_active_state(u
)))
1958 for (j
= 0; j
< ELEMENTSOF(deps
); j
++) {
1963 /* If a dependent unit has a job queued, is active or transitioning, or is marked for
1964 * restart, then don't clean this one up. */
1966 HASHMAP_FOREACH_KEY(v
, other
, u
->dependencies
[deps
[j
]], i
) {
1970 if (!UNIT_IS_INACTIVE_OR_FAILED(unit_active_state(other
)))
1973 if (unit_will_restart(other
))
1981 static void check_unneeded_dependencies(Unit
*u
) {
1983 static const UnitDependency deps
[] = {
1993 /* Add all units this unit depends on to the queue that processes StopWhenUnneeded= behaviour. */
1995 for (j
= 0; j
< ELEMENTSOF(deps
); j
++) {
2000 HASHMAP_FOREACH_KEY(v
, other
, u
->dependencies
[deps
[j
]], i
)
2001 unit_submit_to_stop_when_unneeded_queue(other
);
2005 static void unit_check_binds_to(Unit
*u
) {
2006 _cleanup_(sd_bus_error_free
) sd_bus_error error
= SD_BUS_ERROR_NULL
;
2018 if (unit_active_state(u
) != UNIT_ACTIVE
)
2021 HASHMAP_FOREACH_KEY(v
, other
, u
->dependencies
[UNIT_BINDS_TO
], i
) {
2025 if (!other
->coldplugged
)
2026 /* We might yet create a job for the other unit… */
2029 if (!UNIT_IS_INACTIVE_OR_FAILED(unit_active_state(other
)))
2039 /* If stopping a unit fails continuously we might enter a stop
2040 * loop here, hence stop acting on the service being
2041 * unnecessary after a while. */
2042 if (!ratelimit_below(&u
->auto_stop_ratelimit
)) {
2043 log_unit_warning(u
, "Unit is bound to inactive unit %s, but not stopping since we tried this too often recently.", other
->id
);
2048 log_unit_info(u
, "Unit is bound to inactive unit %s. Stopping, too.", other
->id
);
2050 /* A unit we need to run is gone. Sniff. Let's stop this. */
2051 r
= manager_add_job(u
->manager
, JOB_STOP
, u
, JOB_FAIL
, NULL
, &error
, NULL
);
2053 log_unit_warning_errno(u
, r
, "Failed to enqueue stop job, ignoring: %s", bus_error_message(&error
, r
));
2056 static void retroactively_start_dependencies(Unit
*u
) {
2062 assert(UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(u
)));
2064 HASHMAP_FOREACH_KEY(v
, other
, u
->dependencies
[UNIT_REQUIRES
], i
)
2065 if (!hashmap_get(u
->dependencies
[UNIT_AFTER
], other
) &&
2066 !UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(other
)))
2067 manager_add_job(u
->manager
, JOB_START
, other
, JOB_REPLACE
, NULL
, NULL
, NULL
);
2069 HASHMAP_FOREACH_KEY(v
, other
, u
->dependencies
[UNIT_BINDS_TO
], i
)
2070 if (!hashmap_get(u
->dependencies
[UNIT_AFTER
], other
) &&
2071 !UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(other
)))
2072 manager_add_job(u
->manager
, JOB_START
, other
, JOB_REPLACE
, NULL
, NULL
, NULL
);
2074 HASHMAP_FOREACH_KEY(v
, other
, u
->dependencies
[UNIT_WANTS
], i
)
2075 if (!hashmap_get(u
->dependencies
[UNIT_AFTER
], other
) &&
2076 !UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(other
)))
2077 manager_add_job(u
->manager
, JOB_START
, other
, JOB_FAIL
, NULL
, NULL
, NULL
);
2079 HASHMAP_FOREACH_KEY(v
, other
, u
->dependencies
[UNIT_CONFLICTS
], i
)
2080 if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other
)))
2081 manager_add_job(u
->manager
, JOB_STOP
, other
, JOB_REPLACE
, NULL
, NULL
, NULL
);
2083 HASHMAP_FOREACH_KEY(v
, other
, u
->dependencies
[UNIT_CONFLICTED_BY
], i
)
2084 if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other
)))
2085 manager_add_job(u
->manager
, JOB_STOP
, other
, JOB_REPLACE
, NULL
, NULL
, NULL
);
2088 static void retroactively_stop_dependencies(Unit
*u
) {
2094 assert(UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(u
)));
2096 /* Pull down units which are bound to us recursively if enabled */
2097 HASHMAP_FOREACH_KEY(v
, other
, u
->dependencies
[UNIT_BOUND_BY
], 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
);
2102 void unit_start_on_failure(Unit
*u
) {
2110 if (hashmap_size(u
->dependencies
[UNIT_ON_FAILURE
]) <= 0)
2113 log_unit_info(u
, "Triggering OnFailure= dependencies.");
2115 HASHMAP_FOREACH_KEY(v
, other
, u
->dependencies
[UNIT_ON_FAILURE
], i
) {
2116 _cleanup_(sd_bus_error_free
) sd_bus_error error
= SD_BUS_ERROR_NULL
;
2118 r
= manager_add_job(u
->manager
, JOB_START
, other
, u
->on_failure_job_mode
, NULL
, &error
, NULL
);
2120 log_unit_warning_errno(u
, r
, "Failed to enqueue OnFailure= job, ignoring: %s", bus_error_message(&error
, r
));
2124 void unit_trigger_notify(Unit
*u
) {
2131 HASHMAP_FOREACH_KEY(v
, other
, u
->dependencies
[UNIT_TRIGGERED_BY
], i
)
2132 if (UNIT_VTABLE(other
)->trigger_notify
)
2133 UNIT_VTABLE(other
)->trigger_notify(other
, u
);
2136 static int raise_level(int log_level
, bool condition_info
, bool condition_notice
) {
2137 if (condition_notice
&& log_level
> LOG_NOTICE
)
2139 if (condition_info
&& log_level
> LOG_INFO
)
2144 static int unit_log_resources(Unit
*u
) {
2145 struct iovec iovec
[1 + _CGROUP_IP_ACCOUNTING_METRIC_MAX
+ _CGROUP_IO_ACCOUNTING_METRIC_MAX
+ 4];
2146 bool any_traffic
= false, have_ip_accounting
= false, any_io
= false, have_io_accounting
= false;
2147 _cleanup_free_
char *igress
= NULL
, *egress
= NULL
, *rr
= NULL
, *wr
= NULL
;
2148 int log_level
= LOG_DEBUG
; /* May be raised if resources consumed over a treshold */
2149 size_t n_message_parts
= 0, n_iovec
= 0;
2150 char* message_parts
[1 + 2 + 2 + 1], *t
;
2151 nsec_t nsec
= NSEC_INFINITY
;
2152 CGroupIPAccountingMetric m
;
2155 const char* const ip_fields
[_CGROUP_IP_ACCOUNTING_METRIC_MAX
] = {
2156 [CGROUP_IP_INGRESS_BYTES
] = "IP_METRIC_INGRESS_BYTES",
2157 [CGROUP_IP_INGRESS_PACKETS
] = "IP_METRIC_INGRESS_PACKETS",
2158 [CGROUP_IP_EGRESS_BYTES
] = "IP_METRIC_EGRESS_BYTES",
2159 [CGROUP_IP_EGRESS_PACKETS
] = "IP_METRIC_EGRESS_PACKETS",
2161 const char* const io_fields
[_CGROUP_IO_ACCOUNTING_METRIC_MAX
] = {
2162 [CGROUP_IO_READ_BYTES
] = "IO_METRIC_READ_BYTES",
2163 [CGROUP_IO_WRITE_BYTES
] = "IO_METRIC_WRITE_BYTES",
2164 [CGROUP_IO_READ_OPERATIONS
] = "IO_METRIC_READ_OPERATIONS",
2165 [CGROUP_IO_WRITE_OPERATIONS
] = "IO_METRIC_WRITE_OPERATIONS",
2170 /* Invoked whenever a unit enters failed or dead state. Logs information about consumed resources if resource
2171 * accounting was enabled for a unit. It does this in two ways: a friendly human readable string with reduced
2172 * information and the complete data in structured fields. */
2174 (void) unit_get_cpu_usage(u
, &nsec
);
2175 if (nsec
!= NSEC_INFINITY
) {
2176 char buf
[FORMAT_TIMESPAN_MAX
] = "";
2178 /* Format the CPU time for inclusion in the structured log message */
2179 if (asprintf(&t
, "CPU_USAGE_NSEC=%" PRIu64
, nsec
) < 0) {
2183 iovec
[n_iovec
++] = IOVEC_MAKE_STRING(t
);
2185 /* Format the CPU time for inclusion in the human language message string */
2186 format_timespan(buf
, sizeof(buf
), nsec
/ NSEC_PER_USEC
, USEC_PER_MSEC
);
2187 t
= strjoin("consumed ", buf
, " CPU time");
2193 message_parts
[n_message_parts
++] = t
;
2195 log_level
= raise_level(log_level
,
2196 nsec
> NOTICEWORTHY_CPU_NSEC
,
2197 nsec
> MENTIONWORTHY_CPU_NSEC
);
2200 for (CGroupIOAccountingMetric k
= 0; k
< _CGROUP_IO_ACCOUNTING_METRIC_MAX
; k
++) {
2201 char buf
[FORMAT_BYTES_MAX
] = "";
2202 uint64_t value
= UINT64_MAX
;
2204 assert(io_fields
[k
]);
2206 (void) unit_get_io_accounting(u
, k
, k
> 0, &value
);
2207 if (value
== UINT64_MAX
)
2210 have_io_accounting
= true;
2214 /* Format IO accounting data for inclusion in the structured log message */
2215 if (asprintf(&t
, "%s=%" PRIu64
, io_fields
[k
], value
) < 0) {
2219 iovec
[n_iovec
++] = IOVEC_MAKE_STRING(t
);
2221 /* Format the IO accounting data for inclusion in the human language message string, but only
2222 * for the bytes counters (and not for the operations counters) */
2223 if (k
== CGROUP_IO_READ_BYTES
) {
2225 rr
= strjoin("read ", format_bytes(buf
, sizeof(buf
), value
), " from disk");
2230 } else if (k
== CGROUP_IO_WRITE_BYTES
) {
2232 wr
= strjoin("written ", format_bytes(buf
, sizeof(buf
), value
), " to disk");
2239 if (IN_SET(k
, CGROUP_IO_READ_BYTES
, CGROUP_IO_WRITE_BYTES
))
2240 log_level
= raise_level(log_level
,
2241 value
> MENTIONWORTHY_IO_BYTES
,
2242 value
> NOTICEWORTHY_IO_BYTES
);
2245 if (have_io_accounting
) {
2248 message_parts
[n_message_parts
++] = TAKE_PTR(rr
);
2250 message_parts
[n_message_parts
++] = TAKE_PTR(wr
);
2255 k
= strdup("no IO");
2261 message_parts
[n_message_parts
++] = k
;
2265 for (m
= 0; m
< _CGROUP_IP_ACCOUNTING_METRIC_MAX
; m
++) {
2266 char buf
[FORMAT_BYTES_MAX
] = "";
2267 uint64_t value
= UINT64_MAX
;
2269 assert(ip_fields
[m
]);
2271 (void) unit_get_ip_accounting(u
, m
, &value
);
2272 if (value
== UINT64_MAX
)
2275 have_ip_accounting
= true;
2279 /* Format IP accounting data for inclusion in the structured log message */
2280 if (asprintf(&t
, "%s=%" PRIu64
, ip_fields
[m
], value
) < 0) {
2284 iovec
[n_iovec
++] = IOVEC_MAKE_STRING(t
);
2286 /* Format the IP accounting data for inclusion in the human language message string, but only for the
2287 * bytes counters (and not for the packets counters) */
2288 if (m
== CGROUP_IP_INGRESS_BYTES
) {
2290 igress
= strjoin("received ", format_bytes(buf
, sizeof(buf
), value
), " IP traffic");
2295 } else if (m
== CGROUP_IP_EGRESS_BYTES
) {
2297 egress
= strjoin("sent ", format_bytes(buf
, sizeof(buf
), value
), " IP traffic");
2304 if (IN_SET(m
, CGROUP_IP_INGRESS_BYTES
, CGROUP_IP_EGRESS_BYTES
))
2305 log_level
= raise_level(log_level
,
2306 value
> MENTIONWORTHY_IP_BYTES
,
2307 value
> NOTICEWORTHY_IP_BYTES
);
2310 if (have_ip_accounting
) {
2313 message_parts
[n_message_parts
++] = TAKE_PTR(igress
);
2315 message_parts
[n_message_parts
++] = TAKE_PTR(egress
);
2320 k
= strdup("no IP traffic");
2326 message_parts
[n_message_parts
++] = k
;
2330 /* Is there any accounting data available at all? */
2336 if (n_message_parts
== 0)
2337 t
= strjoina("MESSAGE=", u
->id
, ": Completed.");
2339 _cleanup_free_
char *joined
;
2341 message_parts
[n_message_parts
] = NULL
;
2343 joined
= strv_join(message_parts
, ", ");
2349 joined
[0] = ascii_toupper(joined
[0]);
2350 t
= strjoina("MESSAGE=", u
->id
, ": ", joined
, ".");
2353 /* The following four fields we allocate on the stack or are static strings, we hence don't want to free them,
2354 * and hence don't increase n_iovec for them */
2355 iovec
[n_iovec
] = IOVEC_MAKE_STRING(t
);
2356 iovec
[n_iovec
+ 1] = IOVEC_MAKE_STRING("MESSAGE_ID=" SD_MESSAGE_UNIT_RESOURCES_STR
);
2358 t
= strjoina(u
->manager
->unit_log_field
, u
->id
);
2359 iovec
[n_iovec
+ 2] = IOVEC_MAKE_STRING(t
);
2361 t
= strjoina(u
->manager
->invocation_log_field
, u
->invocation_id_string
);
2362 iovec
[n_iovec
+ 3] = IOVEC_MAKE_STRING(t
);
2364 log_struct_iovec(log_level
, iovec
, n_iovec
+ 4);
2368 for (i
= 0; i
< n_message_parts
; i
++)
2369 free(message_parts
[i
]);
2371 for (i
= 0; i
< n_iovec
; i
++)
2372 free(iovec
[i
].iov_base
);
2378 static void unit_update_on_console(Unit
*u
) {
2383 b
= unit_needs_console(u
);
2384 if (u
->on_console
== b
)
2389 manager_ref_console(u
->manager
);
2391 manager_unref_console(u
->manager
);
2394 static void unit_emit_audit_start(Unit
*u
) {
2397 if (u
->type
!= UNIT_SERVICE
)
2400 /* Write audit record if we have just finished starting up */
2401 manager_send_unit_audit(u
->manager
, u
, AUDIT_SERVICE_START
, true);
2405 static void unit_emit_audit_stop(Unit
*u
, UnitActiveState state
) {
2408 if (u
->type
!= UNIT_SERVICE
)
2412 /* Write audit record if we have just finished shutting down */
2413 manager_send_unit_audit(u
->manager
, u
, AUDIT_SERVICE_STOP
, state
== UNIT_INACTIVE
);
2414 u
->in_audit
= false;
2416 /* Hmm, if there was no start record written write it now, so that we always have a nice pair */
2417 manager_send_unit_audit(u
->manager
, u
, AUDIT_SERVICE_START
, state
== UNIT_INACTIVE
);
2419 if (state
== UNIT_INACTIVE
)
2420 manager_send_unit_audit(u
->manager
, u
, AUDIT_SERVICE_STOP
, true);
2424 static bool unit_process_job(Job
*j
, UnitActiveState ns
, UnitNotifyFlags flags
) {
2425 bool unexpected
= false;
2430 if (j
->state
== JOB_WAITING
)
2432 /* So we reached a different state for this job. Let's see if we can run it now if it failed previously
2434 job_add_to_run_queue(j
);
2436 /* Let's check whether the unit's new state constitutes a finished job, or maybe contradicts a running job and
2437 * hence needs to invalidate jobs. */
2442 case JOB_VERIFY_ACTIVE
:
2444 if (UNIT_IS_ACTIVE_OR_RELOADING(ns
))
2445 job_finish_and_invalidate(j
, JOB_DONE
, true, false);
2446 else if (j
->state
== JOB_RUNNING
&& ns
!= UNIT_ACTIVATING
) {
2449 if (UNIT_IS_INACTIVE_OR_FAILED(ns
)) {
2450 if (ns
== UNIT_FAILED
)
2451 result
= JOB_FAILED
;
2452 else if (FLAGS_SET(flags
, UNIT_NOTIFY_SKIP_CONDITION
))
2453 result
= JOB_SKIPPED
;
2457 job_finish_and_invalidate(j
, result
, true, false);
2464 case JOB_RELOAD_OR_START
:
2465 case JOB_TRY_RELOAD
:
2467 if (j
->state
== JOB_RUNNING
) {
2468 if (ns
== UNIT_ACTIVE
)
2469 job_finish_and_invalidate(j
, (flags
& UNIT_NOTIFY_RELOAD_FAILURE
) ? JOB_FAILED
: JOB_DONE
, true, false);
2470 else if (!IN_SET(ns
, UNIT_ACTIVATING
, UNIT_RELOADING
)) {
2473 if (UNIT_IS_INACTIVE_OR_FAILED(ns
))
2474 job_finish_and_invalidate(j
, ns
== UNIT_FAILED
? JOB_FAILED
: JOB_DONE
, true, false);
2482 case JOB_TRY_RESTART
:
2484 if (UNIT_IS_INACTIVE_OR_FAILED(ns
))
2485 job_finish_and_invalidate(j
, JOB_DONE
, true, false);
2486 else if (j
->state
== JOB_RUNNING
&& ns
!= UNIT_DEACTIVATING
) {
2488 job_finish_and_invalidate(j
, JOB_FAILED
, true, false);
2494 assert_not_reached("Job type unknown");
2500 void unit_notify(Unit
*u
, UnitActiveState os
, UnitActiveState ns
, UnitNotifyFlags flags
) {
2505 assert(os
< _UNIT_ACTIVE_STATE_MAX
);
2506 assert(ns
< _UNIT_ACTIVE_STATE_MAX
);
2508 /* Note that this is called for all low-level state changes, even if they might map to the same high-level
2509 * UnitActiveState! That means that ns == os is an expected behavior here. For example: if a mount point is
2510 * remounted this function will be called too! */
2514 /* Let's enqueue the change signal early. In case this unit has a job associated we want that this unit is in
2515 * the bus queue, so that any job change signal queued will force out the unit change signal first. */
2516 unit_add_to_dbus_queue(u
);
2518 /* Update timestamps for state changes */
2519 if (!MANAGER_IS_RELOADING(m
)) {
2520 dual_timestamp_get(&u
->state_change_timestamp
);
2522 if (UNIT_IS_INACTIVE_OR_FAILED(os
) && !UNIT_IS_INACTIVE_OR_FAILED(ns
))
2523 u
->inactive_exit_timestamp
= u
->state_change_timestamp
;
2524 else if (!UNIT_IS_INACTIVE_OR_FAILED(os
) && UNIT_IS_INACTIVE_OR_FAILED(ns
))
2525 u
->inactive_enter_timestamp
= u
->state_change_timestamp
;
2527 if (!UNIT_IS_ACTIVE_OR_RELOADING(os
) && UNIT_IS_ACTIVE_OR_RELOADING(ns
))
2528 u
->active_enter_timestamp
= u
->state_change_timestamp
;
2529 else if (UNIT_IS_ACTIVE_OR_RELOADING(os
) && !UNIT_IS_ACTIVE_OR_RELOADING(ns
))
2530 u
->active_exit_timestamp
= u
->state_change_timestamp
;
2533 /* Keep track of failed units */
2534 (void) manager_update_failed_units(m
, u
, ns
== UNIT_FAILED
);
2536 /* Make sure the cgroup and state files are always removed when we become inactive */
2537 if (UNIT_IS_INACTIVE_OR_FAILED(ns
)) {
2538 unit_prune_cgroup(u
);
2539 unit_unlink_state_files(u
);
2542 unit_update_on_console(u
);
2544 if (!MANAGER_IS_RELOADING(m
)) {
2547 /* Let's propagate state changes to the job */
2549 unexpected
= unit_process_job(u
->job
, ns
, flags
);
2553 /* If this state change happened without being requested by a job, then let's retroactively start or
2554 * stop dependencies. We skip that step when deserializing, since we don't want to create any
2555 * additional jobs just because something is already activated. */
2558 if (UNIT_IS_INACTIVE_OR_FAILED(os
) && UNIT_IS_ACTIVE_OR_ACTIVATING(ns
))
2559 retroactively_start_dependencies(u
);
2560 else if (UNIT_IS_ACTIVE_OR_ACTIVATING(os
) && UNIT_IS_INACTIVE_OR_DEACTIVATING(ns
))
2561 retroactively_stop_dependencies(u
);
2564 /* stop unneeded units regardless if going down was expected or not */
2565 if (UNIT_IS_INACTIVE_OR_FAILED(ns
))
2566 check_unneeded_dependencies(u
);
2568 if (ns
!= os
&& ns
== UNIT_FAILED
) {
2569 log_unit_debug(u
, "Unit entered failed state.");
2571 if (!(flags
& UNIT_NOTIFY_WILL_AUTO_RESTART
))
2572 unit_start_on_failure(u
);
2575 if (UNIT_IS_ACTIVE_OR_RELOADING(ns
) && !UNIT_IS_ACTIVE_OR_RELOADING(os
)) {
2576 /* This unit just finished starting up */
2578 unit_emit_audit_start(u
);
2579 manager_send_unit_plymouth(m
, u
);
2582 if (UNIT_IS_INACTIVE_OR_FAILED(ns
) && !UNIT_IS_INACTIVE_OR_FAILED(os
)) {
2583 /* This unit just stopped/failed. */
2585 unit_emit_audit_stop(u
, ns
);
2586 unit_log_resources(u
);
2590 manager_recheck_journal(m
);
2591 manager_recheck_dbus(m
);
2593 unit_trigger_notify(u
);
2595 if (!MANAGER_IS_RELOADING(m
)) {
2596 /* Maybe we finished startup and are now ready for being stopped because unneeded? */
2597 unit_submit_to_stop_when_unneeded_queue(u
);
2599 /* Maybe we finished startup, but something we needed has vanished? Let's die then. (This happens when
2600 * something BindsTo= to a Type=oneshot unit, as these units go directly from starting to inactive,
2601 * without ever entering started.) */
2602 unit_check_binds_to(u
);
2604 if (os
!= UNIT_FAILED
&& ns
== UNIT_FAILED
) {
2605 reason
= strjoina("unit ", u
->id
, " failed");
2606 emergency_action(m
, u
->failure_action
, 0, u
->reboot_arg
, unit_failure_action_exit_status(u
), reason
);
2607 } else if (!UNIT_IS_INACTIVE_OR_FAILED(os
) && ns
== UNIT_INACTIVE
) {
2608 reason
= strjoina("unit ", u
->id
, " succeeded");
2609 emergency_action(m
, u
->success_action
, 0, u
->reboot_arg
, unit_success_action_exit_status(u
), reason
);
2613 unit_add_to_gc_queue(u
);
2616 int unit_watch_pid(Unit
*u
, pid_t pid
, bool exclusive
) {
2620 assert(pid_is_valid(pid
));
2622 /* Watch a specific PID */
2624 /* Caller might be sure that this PID belongs to this unit only. Let's take this
2625 * opportunity to remove any stalled references to this PID as they can be created
2626 * easily (when watching a process which is not our direct child). */
2628 manager_unwatch_pid(u
->manager
, pid
);
2630 r
= set_ensure_allocated(&u
->pids
, NULL
);
2634 r
= hashmap_ensure_allocated(&u
->manager
->watch_pids
, NULL
);
2638 /* First try, let's add the unit keyed by "pid". */
2639 r
= hashmap_put(u
->manager
->watch_pids
, PID_TO_PTR(pid
), u
);
2645 /* OK, the "pid" key is already assigned to a different unit. Let's see if the "-pid" key (which points
2646 * to an array of Units rather than just a Unit), lists us already. */
2648 array
= hashmap_get(u
->manager
->watch_pids
, PID_TO_PTR(-pid
));
2650 for (; array
[n
]; n
++)
2654 if (found
) /* Found it already? if so, do nothing */
2659 /* Allocate a new array */
2660 new_array
= new(Unit
*, n
+ 2);
2664 memcpy_safe(new_array
, array
, sizeof(Unit
*) * n
);
2666 new_array
[n
+1] = NULL
;
2668 /* Add or replace the old array */
2669 r
= hashmap_replace(u
->manager
->watch_pids
, PID_TO_PTR(-pid
), new_array
);
2680 r
= set_put(u
->pids
, PID_TO_PTR(pid
));
2687 void unit_unwatch_pid(Unit
*u
, pid_t pid
) {
2691 assert(pid_is_valid(pid
));
2693 /* First let's drop the unit in case it's keyed as "pid". */
2694 (void) hashmap_remove_value(u
->manager
->watch_pids
, PID_TO_PTR(pid
), u
);
2696 /* Then, let's also drop the unit, in case it's in the array keyed by -pid */
2697 array
= hashmap_get(u
->manager
->watch_pids
, PID_TO_PTR(-pid
));
2701 /* Let's iterate through the array, dropping our own entry */
2702 for (n
= 0; array
[n
]; n
++)
2704 array
[m
++] = array
[n
];
2708 /* The array is now empty, remove the entire entry */
2709 assert(hashmap_remove(u
->manager
->watch_pids
, PID_TO_PTR(-pid
)) == array
);
2714 (void) set_remove(u
->pids
, PID_TO_PTR(pid
));
2717 void unit_unwatch_all_pids(Unit
*u
) {
2720 while (!set_isempty(u
->pids
))
2721 unit_unwatch_pid(u
, PTR_TO_PID(set_first(u
->pids
)));
2723 u
->pids
= set_free(u
->pids
);
2726 static void unit_tidy_watch_pids(Unit
*u
) {
2727 pid_t except1
, except2
;
2733 /* Cleans dead PIDs from our list */
2735 except1
= unit_main_pid(u
);
2736 except2
= unit_control_pid(u
);
2738 SET_FOREACH(e
, u
->pids
, i
) {
2739 pid_t pid
= PTR_TO_PID(e
);
2741 if (pid
== except1
|| pid
== except2
)
2744 if (!pid_is_unwaited(pid
))
2745 unit_unwatch_pid(u
, pid
);
2749 static int on_rewatch_pids_event(sd_event_source
*s
, void *userdata
) {
2755 unit_tidy_watch_pids(u
);
2756 unit_watch_all_pids(u
);
2758 /* If the PID set is empty now, then let's finish this off. */
2759 unit_synthesize_cgroup_empty_event(u
);
2764 int unit_enqueue_rewatch_pids(Unit
*u
) {
2769 if (!u
->cgroup_path
)
2772 r
= cg_unified_controller(SYSTEMD_CGROUP_CONTROLLER
);
2775 if (r
> 0) /* On unified we can use proper notifications */
2778 /* Enqueues a low-priority job that will clean up dead PIDs from our list of PIDs to watch and subscribe to new
2779 * PIDs that might have appeared. We do this in a delayed job because the work might be quite slow, as it
2780 * involves issuing kill(pid, 0) on all processes we watch. */
2782 if (!u
->rewatch_pids_event_source
) {
2783 _cleanup_(sd_event_source_unrefp
) sd_event_source
*s
= NULL
;
2785 r
= sd_event_add_defer(u
->manager
->event
, &s
, on_rewatch_pids_event
, u
);
2787 return log_error_errno(r
, "Failed to allocate event source for tidying watched PIDs: %m");
2789 r
= sd_event_source_set_priority(s
, SD_EVENT_PRIORITY_IDLE
);
2791 return log_error_errno(r
, "Failed to adjust priority of event source for tidying watched PIDs: m");
2793 (void) sd_event_source_set_description(s
, "tidy-watch-pids");
2795 u
->rewatch_pids_event_source
= TAKE_PTR(s
);
2798 r
= sd_event_source_set_enabled(u
->rewatch_pids_event_source
, SD_EVENT_ONESHOT
);
2800 return log_error_errno(r
, "Failed to enable event source for tidying watched PIDs: %m");
2805 void unit_dequeue_rewatch_pids(Unit
*u
) {
2809 if (!u
->rewatch_pids_event_source
)
2812 r
= sd_event_source_set_enabled(u
->rewatch_pids_event_source
, SD_EVENT_OFF
);
2814 log_warning_errno(r
, "Failed to disable event source for tidying watched PIDs, ignoring: %m");
2816 u
->rewatch_pids_event_source
= sd_event_source_unref(u
->rewatch_pids_event_source
);
2819 bool unit_job_is_applicable(Unit
*u
, JobType j
) {
2821 assert(j
>= 0 && j
< _JOB_TYPE_MAX
);
2825 case JOB_VERIFY_ACTIVE
:
2828 /* Note that we don't check unit_can_start() here. That's because .device units and suchlike are not
2829 * startable by us but may appear due to external events, and it thus makes sense to permit enqueing
2834 /* Similar as above. However, perpetual units can never be stopped (neither explicitly nor due to
2835 * external events), hence it makes no sense to permit enqueing such a request either. */
2836 return !u
->perpetual
;
2839 case JOB_TRY_RESTART
:
2840 return unit_can_stop(u
) && unit_can_start(u
);
2843 case JOB_TRY_RELOAD
:
2844 return unit_can_reload(u
);
2846 case JOB_RELOAD_OR_START
:
2847 return unit_can_reload(u
) && unit_can_start(u
);
2850 assert_not_reached("Invalid job type");
2854 static void maybe_warn_about_dependency(Unit
*u
, const char *other
, UnitDependency dependency
) {
2857 /* Only warn about some unit types */
2858 if (!IN_SET(dependency
, UNIT_CONFLICTS
, UNIT_CONFLICTED_BY
, UNIT_BEFORE
, UNIT_AFTER
, UNIT_ON_FAILURE
, UNIT_TRIGGERS
, UNIT_TRIGGERED_BY
))
2861 if (streq_ptr(u
->id
, other
))
2862 log_unit_warning(u
, "Dependency %s=%s dropped", unit_dependency_to_string(dependency
), u
->id
);
2864 log_unit_warning(u
, "Dependency %s=%s dropped, merged into %s", unit_dependency_to_string(dependency
), strna(other
), u
->id
);
2867 static int unit_add_dependency_hashmap(
2870 UnitDependencyMask origin_mask
,
2871 UnitDependencyMask destination_mask
) {
2873 UnitDependencyInfo info
;
2878 assert(origin_mask
< _UNIT_DEPENDENCY_MASK_FULL
);
2879 assert(destination_mask
< _UNIT_DEPENDENCY_MASK_FULL
);
2880 assert(origin_mask
> 0 || destination_mask
> 0);
2882 r
= hashmap_ensure_allocated(h
, NULL
);
2886 assert_cc(sizeof(void*) == sizeof(info
));
2888 info
.data
= hashmap_get(*h
, other
);
2890 /* Entry already exists. Add in our mask. */
2892 if (FLAGS_SET(origin_mask
, info
.origin_mask
) &&
2893 FLAGS_SET(destination_mask
, info
.destination_mask
))
2896 info
.origin_mask
|= origin_mask
;
2897 info
.destination_mask
|= destination_mask
;
2899 r
= hashmap_update(*h
, other
, info
.data
);
2901 info
= (UnitDependencyInfo
) {
2902 .origin_mask
= origin_mask
,
2903 .destination_mask
= destination_mask
,
2906 r
= hashmap_put(*h
, other
, info
.data
);
2914 int unit_add_dependency(
2919 UnitDependencyMask mask
) {
2921 static const UnitDependency inverse_table
[_UNIT_DEPENDENCY_MAX
] = {
2922 [UNIT_REQUIRES
] = UNIT_REQUIRED_BY
,
2923 [UNIT_WANTS
] = UNIT_WANTED_BY
,
2924 [UNIT_REQUISITE
] = UNIT_REQUISITE_OF
,
2925 [UNIT_BINDS_TO
] = UNIT_BOUND_BY
,
2926 [UNIT_PART_OF
] = UNIT_CONSISTS_OF
,
2927 [UNIT_REQUIRED_BY
] = UNIT_REQUIRES
,
2928 [UNIT_REQUISITE_OF
] = UNIT_REQUISITE
,
2929 [UNIT_WANTED_BY
] = UNIT_WANTS
,
2930 [UNIT_BOUND_BY
] = UNIT_BINDS_TO
,
2931 [UNIT_CONSISTS_OF
] = UNIT_PART_OF
,
2932 [UNIT_CONFLICTS
] = UNIT_CONFLICTED_BY
,
2933 [UNIT_CONFLICTED_BY
] = UNIT_CONFLICTS
,
2934 [UNIT_BEFORE
] = UNIT_AFTER
,
2935 [UNIT_AFTER
] = UNIT_BEFORE
,
2936 [UNIT_ON_FAILURE
] = _UNIT_DEPENDENCY_INVALID
,
2937 [UNIT_REFERENCES
] = UNIT_REFERENCED_BY
,
2938 [UNIT_REFERENCED_BY
] = UNIT_REFERENCES
,
2939 [UNIT_TRIGGERS
] = UNIT_TRIGGERED_BY
,
2940 [UNIT_TRIGGERED_BY
] = UNIT_TRIGGERS
,
2941 [UNIT_PROPAGATES_RELOAD_TO
] = UNIT_RELOAD_PROPAGATED_FROM
,
2942 [UNIT_RELOAD_PROPAGATED_FROM
] = UNIT_PROPAGATES_RELOAD_TO
,
2943 [UNIT_JOINS_NAMESPACE_OF
] = UNIT_JOINS_NAMESPACE_OF
,
2945 Unit
*original_u
= u
, *original_other
= other
;
2949 assert(d
>= 0 && d
< _UNIT_DEPENDENCY_MAX
);
2952 u
= unit_follow_merge(u
);
2953 other
= unit_follow_merge(other
);
2955 /* We won't allow dependencies on ourselves. We will not
2956 * consider them an error however. */
2958 maybe_warn_about_dependency(original_u
, original_other
->id
, d
);
2962 if ((d
== UNIT_BEFORE
&& other
->type
== UNIT_DEVICE
) ||
2963 (d
== UNIT_AFTER
&& u
->type
== UNIT_DEVICE
)) {
2964 log_unit_warning(u
, "Dependency Before=%s ignored (.device units cannot be delayed)", other
->id
);
2968 r
= unit_add_dependency_hashmap(u
->dependencies
+ d
, other
, mask
, 0);
2972 if (inverse_table
[d
] != _UNIT_DEPENDENCY_INVALID
&& inverse_table
[d
] != d
) {
2973 r
= unit_add_dependency_hashmap(other
->dependencies
+ inverse_table
[d
], u
, 0, mask
);
2978 if (add_reference
) {
2979 r
= unit_add_dependency_hashmap(u
->dependencies
+ UNIT_REFERENCES
, other
, mask
, 0);
2983 r
= unit_add_dependency_hashmap(other
->dependencies
+ UNIT_REFERENCED_BY
, u
, 0, mask
);
2988 unit_add_to_dbus_queue(u
);
2992 int unit_add_two_dependencies(Unit
*u
, UnitDependency d
, UnitDependency e
, Unit
*other
, bool add_reference
, UnitDependencyMask mask
) {
2997 r
= unit_add_dependency(u
, d
, other
, add_reference
, mask
);
3001 return unit_add_dependency(u
, e
, other
, add_reference
, mask
);
3004 static int resolve_template(Unit
*u
, const char *name
, char **buf
, const char **ret
) {
3012 if (!unit_name_is_valid(name
, UNIT_NAME_TEMPLATE
)) {
3019 r
= unit_name_replace_instance(name
, u
->instance
, buf
);
3021 _cleanup_free_
char *i
= NULL
;
3023 r
= unit_name_to_prefix(u
->id
, &i
);
3027 r
= unit_name_replace_instance(name
, i
, buf
);
3036 int unit_add_dependency_by_name(Unit
*u
, UnitDependency d
, const char *name
, bool add_reference
, UnitDependencyMask mask
) {
3037 _cleanup_free_
char *buf
= NULL
;
3044 r
= resolve_template(u
, name
, &buf
, &name
);
3048 r
= manager_load_unit(u
->manager
, name
, NULL
, NULL
, &other
);
3052 return unit_add_dependency(u
, d
, other
, add_reference
, mask
);
3055 int unit_add_two_dependencies_by_name(Unit
*u
, UnitDependency d
, UnitDependency e
, const char *name
, bool add_reference
, UnitDependencyMask mask
) {
3056 _cleanup_free_
char *buf
= NULL
;
3063 r
= resolve_template(u
, name
, &buf
, &name
);
3067 r
= manager_load_unit(u
->manager
, name
, NULL
, NULL
, &other
);
3071 return unit_add_two_dependencies(u
, d
, e
, other
, add_reference
, mask
);
3074 int set_unit_path(const char *p
) {
3075 /* This is mostly for debug purposes */
3076 if (setenv("SYSTEMD_UNIT_PATH", p
, 1) < 0)
3082 char *unit_dbus_path(Unit
*u
) {
3088 return unit_dbus_path_from_name(u
->id
);
3091 char *unit_dbus_path_invocation_id(Unit
*u
) {
3094 if (sd_id128_is_null(u
->invocation_id
))
3097 return unit_dbus_path_from_name(u
->invocation_id_string
);
3100 int unit_set_slice(Unit
*u
, Unit
*slice
) {
3104 /* Sets the unit slice if it has not been set before. Is extra
3105 * careful, to only allow this for units that actually have a
3106 * cgroup context. Also, we don't allow to set this for slices
3107 * (since the parent slice is derived from the name). Make
3108 * sure the unit we set is actually a slice. */
3110 if (!UNIT_HAS_CGROUP_CONTEXT(u
))
3113 if (u
->type
== UNIT_SLICE
)
3116 if (unit_active_state(u
) != UNIT_INACTIVE
)
3119 if (slice
->type
!= UNIT_SLICE
)
3122 if (unit_has_name(u
, SPECIAL_INIT_SCOPE
) &&
3123 !unit_has_name(slice
, SPECIAL_ROOT_SLICE
))
3126 if (UNIT_DEREF(u
->slice
) == slice
)
3129 /* Disallow slice changes if @u is already bound to cgroups */
3130 if (UNIT_ISSET(u
->slice
) && u
->cgroup_realized
)
3133 unit_ref_set(&u
->slice
, u
, slice
);
3137 int unit_set_default_slice(Unit
*u
) {
3138 const char *slice_name
;
3144 if (UNIT_ISSET(u
->slice
))
3148 _cleanup_free_
char *prefix
= NULL
, *escaped
= NULL
;
3150 /* Implicitly place all instantiated units in their
3151 * own per-template slice */
3153 r
= unit_name_to_prefix(u
->id
, &prefix
);
3157 /* The prefix is already escaped, but it might include
3158 * "-" which has a special meaning for slice units,
3159 * hence escape it here extra. */
3160 escaped
= unit_name_escape(prefix
);
3164 if (MANAGER_IS_SYSTEM(u
->manager
))
3165 slice_name
= strjoina("system-", escaped
, ".slice");
3167 slice_name
= strjoina(escaped
, ".slice");
3170 MANAGER_IS_SYSTEM(u
->manager
) && !unit_has_name(u
, SPECIAL_INIT_SCOPE
)
3171 ? SPECIAL_SYSTEM_SLICE
3172 : SPECIAL_ROOT_SLICE
;
3174 r
= manager_load_unit(u
->manager
, slice_name
, NULL
, NULL
, &slice
);
3178 return unit_set_slice(u
, slice
);
3181 const char *unit_slice_name(Unit
*u
) {
3184 if (!UNIT_ISSET(u
->slice
))
3187 return UNIT_DEREF(u
->slice
)->id
;
3190 int unit_load_related_unit(Unit
*u
, const char *type
, Unit
**_found
) {
3191 _cleanup_free_
char *t
= NULL
;
3198 r
= unit_name_change_suffix(u
->id
, type
, &t
);
3201 if (unit_has_name(u
, t
))
3204 r
= manager_load_unit(u
->manager
, t
, NULL
, NULL
, _found
);
3205 assert(r
< 0 || *_found
!= u
);
3209 static int signal_name_owner_changed(sd_bus_message
*message
, void *userdata
, sd_bus_error
*error
) {
3210 const char *name
, *old_owner
, *new_owner
;
3217 r
= sd_bus_message_read(message
, "sss", &name
, &old_owner
, &new_owner
);
3219 bus_log_parse_error(r
);
3223 old_owner
= empty_to_null(old_owner
);
3224 new_owner
= empty_to_null(new_owner
);
3226 if (UNIT_VTABLE(u
)->bus_name_owner_change
)
3227 UNIT_VTABLE(u
)->bus_name_owner_change(u
, old_owner
, new_owner
);
3232 static int get_name_owner_handler(sd_bus_message
*message
, void *userdata
, sd_bus_error
*error
) {
3233 const sd_bus_error
*e
;
3234 const char *new_owner
;
3241 u
->get_name_owner_slot
= sd_bus_slot_unref(u
->get_name_owner_slot
);
3243 if (sd_bus_error_is_set(error
)) {
3244 log_error("Failed to get name owner from bus: %s", error
->message
);
3248 e
= sd_bus_message_get_error(message
);
3249 if (sd_bus_error_has_name(e
, "org.freedesktop.DBus.Error.NameHasNoOwner"))
3253 log_error("Unexpected error response from GetNameOwner: %s", e
->message
);
3257 r
= sd_bus_message_read(message
, "s", &new_owner
);
3259 bus_log_parse_error(r
);
3263 new_owner
= empty_to_null(new_owner
);
3265 if (UNIT_VTABLE(u
)->bus_name_owner_change
)
3266 UNIT_VTABLE(u
)->bus_name_owner_change(u
, NULL
, new_owner
);
3271 int unit_install_bus_match(Unit
*u
, sd_bus
*bus
, const char *name
) {
3278 if (u
->match_bus_slot
)
3281 match
= strjoina("type='signal',"
3282 "sender='org.freedesktop.DBus',"
3283 "path='/org/freedesktop/DBus',"
3284 "interface='org.freedesktop.DBus',"
3285 "member='NameOwnerChanged',"
3286 "arg0='", name
, "'");
3288 int r
= sd_bus_add_match_async(bus
, &u
->match_bus_slot
, match
, signal_name_owner_changed
, NULL
, u
);
3292 return sd_bus_call_method_async(bus
,
3293 &u
->get_name_owner_slot
,
3294 "org.freedesktop.DBus",
3295 "/org/freedesktop/DBus",
3296 "org.freedesktop.DBus",
3298 get_name_owner_handler
,
3303 int unit_watch_bus_name(Unit
*u
, const char *name
) {
3309 /* Watch a specific name on the bus. We only support one unit
3310 * watching each name for now. */
3312 if (u
->manager
->api_bus
) {
3313 /* If the bus is already available, install the match directly.
3314 * Otherwise, just put the name in the list. bus_setup_api() will take care later. */
3315 r
= unit_install_bus_match(u
, u
->manager
->api_bus
, name
);
3317 return log_warning_errno(r
, "Failed to subscribe to NameOwnerChanged signal for '%s': %m", name
);
3320 r
= hashmap_put(u
->manager
->watch_bus
, name
, u
);
3322 u
->match_bus_slot
= sd_bus_slot_unref(u
->match_bus_slot
);
3323 return log_warning_errno(r
, "Failed to put bus name to hashmap: %m");
3329 void unit_unwatch_bus_name(Unit
*u
, const char *name
) {
3333 (void) hashmap_remove_value(u
->manager
->watch_bus
, name
, u
);
3334 u
->match_bus_slot
= sd_bus_slot_unref(u
->match_bus_slot
);
3335 u
->get_name_owner_slot
= sd_bus_slot_unref(u
->get_name_owner_slot
);
3338 bool unit_can_serialize(Unit
*u
) {
3341 return UNIT_VTABLE(u
)->serialize
&& UNIT_VTABLE(u
)->deserialize_item
;
3344 static int serialize_cgroup_mask(FILE *f
, const char *key
, CGroupMask mask
) {
3345 _cleanup_free_
char *s
= NULL
;
3354 r
= cg_mask_to_string(mask
, &s
);
3356 return log_error_errno(r
, "Failed to format cgroup mask: %m");
3358 return serialize_item(f
, key
, s
);
3361 static const char *const ip_accounting_metric_field
[_CGROUP_IP_ACCOUNTING_METRIC_MAX
] = {
3362 [CGROUP_IP_INGRESS_BYTES
] = "ip-accounting-ingress-bytes",
3363 [CGROUP_IP_INGRESS_PACKETS
] = "ip-accounting-ingress-packets",
3364 [CGROUP_IP_EGRESS_BYTES
] = "ip-accounting-egress-bytes",
3365 [CGROUP_IP_EGRESS_PACKETS
] = "ip-accounting-egress-packets",
3368 static const char *const io_accounting_metric_field_base
[_CGROUP_IO_ACCOUNTING_METRIC_MAX
] = {
3369 [CGROUP_IO_READ_BYTES
] = "io-accounting-read-bytes-base",
3370 [CGROUP_IO_WRITE_BYTES
] = "io-accounting-write-bytes-base",
3371 [CGROUP_IO_READ_OPERATIONS
] = "io-accounting-read-operations-base",
3372 [CGROUP_IO_WRITE_OPERATIONS
] = "io-accounting-write-operations-base",
3375 static const char *const io_accounting_metric_field_last
[_CGROUP_IO_ACCOUNTING_METRIC_MAX
] = {
3376 [CGROUP_IO_READ_BYTES
] = "io-accounting-read-bytes-last",
3377 [CGROUP_IO_WRITE_BYTES
] = "io-accounting-write-bytes-last",
3378 [CGROUP_IO_READ_OPERATIONS
] = "io-accounting-read-operations-last",
3379 [CGROUP_IO_WRITE_OPERATIONS
] = "io-accounting-write-operations-last",
3382 int unit_serialize(Unit
*u
, FILE *f
, FDSet
*fds
, bool serialize_jobs
) {
3383 CGroupIPAccountingMetric m
;
3390 if (unit_can_serialize(u
)) {
3391 r
= UNIT_VTABLE(u
)->serialize(u
, f
, fds
);
3396 (void) serialize_dual_timestamp(f
, "state-change-timestamp", &u
->state_change_timestamp
);
3398 (void) serialize_dual_timestamp(f
, "inactive-exit-timestamp", &u
->inactive_exit_timestamp
);
3399 (void) serialize_dual_timestamp(f
, "active-enter-timestamp", &u
->active_enter_timestamp
);
3400 (void) serialize_dual_timestamp(f
, "active-exit-timestamp", &u
->active_exit_timestamp
);
3401 (void) serialize_dual_timestamp(f
, "inactive-enter-timestamp", &u
->inactive_enter_timestamp
);
3403 (void) serialize_dual_timestamp(f
, "condition-timestamp", &u
->condition_timestamp
);
3404 (void) serialize_dual_timestamp(f
, "assert-timestamp", &u
->assert_timestamp
);
3406 if (dual_timestamp_is_set(&u
->condition_timestamp
))
3407 (void) serialize_bool(f
, "condition-result", u
->condition_result
);
3409 if (dual_timestamp_is_set(&u
->assert_timestamp
))
3410 (void) serialize_bool(f
, "assert-result", u
->assert_result
);
3412 (void) serialize_bool(f
, "transient", u
->transient
);
3413 (void) serialize_bool(f
, "in-audit", u
->in_audit
);
3415 (void) serialize_bool(f
, "exported-invocation-id", u
->exported_invocation_id
);
3416 (void) serialize_bool(f
, "exported-log-level-max", u
->exported_log_level_max
);
3417 (void) serialize_bool(f
, "exported-log-extra-fields", u
->exported_log_extra_fields
);
3418 (void) serialize_bool(f
, "exported-log-rate-limit-interval", u
->exported_log_rate_limit_interval
);
3419 (void) serialize_bool(f
, "exported-log-rate-limit-burst", u
->exported_log_rate_limit_burst
);
3421 (void) serialize_item_format(f
, "cpu-usage-base", "%" PRIu64
, u
->cpu_usage_base
);
3422 if (u
->cpu_usage_last
!= NSEC_INFINITY
)
3423 (void) serialize_item_format(f
, "cpu-usage-last", "%" PRIu64
, u
->cpu_usage_last
);
3425 if (u
->oom_kill_last
> 0)
3426 (void) serialize_item_format(f
, "oom-kill-last", "%" PRIu64
, u
->oom_kill_last
);
3428 for (CGroupIOAccountingMetric im
= 0; im
< _CGROUP_IO_ACCOUNTING_METRIC_MAX
; im
++) {
3429 (void) serialize_item_format(f
, io_accounting_metric_field_base
[im
], "%" PRIu64
, u
->io_accounting_base
[im
]);
3431 if (u
->io_accounting_last
[im
] != UINT64_MAX
)
3432 (void) serialize_item_format(f
, io_accounting_metric_field_last
[im
], "%" PRIu64
, u
->io_accounting_last
[im
]);
3436 (void) serialize_item(f
, "cgroup", u
->cgroup_path
);
3438 (void) serialize_bool(f
, "cgroup-realized", u
->cgroup_realized
);
3439 (void) serialize_cgroup_mask(f
, "cgroup-realized-mask", u
->cgroup_realized_mask
);
3440 (void) serialize_cgroup_mask(f
, "cgroup-enabled-mask", u
->cgroup_enabled_mask
);
3441 (void) serialize_cgroup_mask(f
, "cgroup-invalidated-mask", u
->cgroup_invalidated_mask
);
3443 if (uid_is_valid(u
->ref_uid
))
3444 (void) serialize_item_format(f
, "ref-uid", UID_FMT
, u
->ref_uid
);
3445 if (gid_is_valid(u
->ref_gid
))
3446 (void) serialize_item_format(f
, "ref-gid", GID_FMT
, u
->ref_gid
);
3448 if (!sd_id128_is_null(u
->invocation_id
))
3449 (void) serialize_item_format(f
, "invocation-id", SD_ID128_FORMAT_STR
, SD_ID128_FORMAT_VAL(u
->invocation_id
));
3451 bus_track_serialize(u
->bus_track
, f
, "ref");
3453 for (m
= 0; m
< _CGROUP_IP_ACCOUNTING_METRIC_MAX
; m
++) {
3456 r
= unit_get_ip_accounting(u
, m
, &v
);
3458 (void) serialize_item_format(f
, ip_accounting_metric_field
[m
], "%" PRIu64
, v
);
3461 if (serialize_jobs
) {
3464 job_serialize(u
->job
, f
);
3469 job_serialize(u
->nop_job
, f
);
3478 static int unit_deserialize_job(Unit
*u
, FILE *f
) {
3479 _cleanup_(job_freep
) Job
*j
= NULL
;
3489 r
= job_deserialize(j
, f
);
3493 r
= job_install_deserialized(j
);
3501 int unit_deserialize(Unit
*u
, FILE *f
, FDSet
*fds
) {
3509 _cleanup_free_
char *line
= NULL
;
3514 r
= read_line(f
, LONG_LINE_MAX
, &line
);
3516 return log_error_errno(r
, "Failed to read serialization line: %m");
3517 if (r
== 0) /* eof */
3521 if (isempty(l
)) /* End marker */
3524 k
= strcspn(l
, "=");
3532 if (streq(l
, "job")) {
3534 /* New-style serialized job */
3535 r
= unit_deserialize_job(u
, f
);
3538 } else /* Legacy for pre-44 */
3539 log_unit_warning(u
, "Update from too old systemd versions are unsupported, cannot deserialize job: %s", v
);
3541 } else if (streq(l
, "state-change-timestamp")) {
3542 (void) deserialize_dual_timestamp(v
, &u
->state_change_timestamp
);
3544 } else if (streq(l
, "inactive-exit-timestamp")) {
3545 (void) deserialize_dual_timestamp(v
, &u
->inactive_exit_timestamp
);
3547 } else if (streq(l
, "active-enter-timestamp")) {
3548 (void) deserialize_dual_timestamp(v
, &u
->active_enter_timestamp
);
3550 } else if (streq(l
, "active-exit-timestamp")) {
3551 (void) deserialize_dual_timestamp(v
, &u
->active_exit_timestamp
);
3553 } else if (streq(l
, "inactive-enter-timestamp")) {
3554 (void) deserialize_dual_timestamp(v
, &u
->inactive_enter_timestamp
);
3556 } else if (streq(l
, "condition-timestamp")) {
3557 (void) deserialize_dual_timestamp(v
, &u
->condition_timestamp
);
3559 } else if (streq(l
, "assert-timestamp")) {
3560 (void) deserialize_dual_timestamp(v
, &u
->assert_timestamp
);
3562 } else if (streq(l
, "condition-result")) {
3564 r
= parse_boolean(v
);
3566 log_unit_debug(u
, "Failed to parse condition result value %s, ignoring.", v
);
3568 u
->condition_result
= r
;
3572 } else if (streq(l
, "assert-result")) {
3574 r
= parse_boolean(v
);
3576 log_unit_debug(u
, "Failed to parse assert result value %s, ignoring.", v
);
3578 u
->assert_result
= r
;
3582 } else if (streq(l
, "transient")) {
3584 r
= parse_boolean(v
);
3586 log_unit_debug(u
, "Failed to parse transient bool %s, ignoring.", v
);
3592 } else if (streq(l
, "in-audit")) {
3594 r
= parse_boolean(v
);
3596 log_unit_debug(u
, "Failed to parse in-audit bool %s, ignoring.", v
);
3602 } else if (streq(l
, "exported-invocation-id")) {
3604 r
= parse_boolean(v
);
3606 log_unit_debug(u
, "Failed to parse exported invocation ID bool %s, ignoring.", v
);
3608 u
->exported_invocation_id
= r
;
3612 } else if (streq(l
, "exported-log-level-max")) {
3614 r
= parse_boolean(v
);
3616 log_unit_debug(u
, "Failed to parse exported log level max bool %s, ignoring.", v
);
3618 u
->exported_log_level_max
= r
;
3622 } else if (streq(l
, "exported-log-extra-fields")) {
3624 r
= parse_boolean(v
);
3626 log_unit_debug(u
, "Failed to parse exported log extra fields bool %s, ignoring.", v
);
3628 u
->exported_log_extra_fields
= r
;
3632 } else if (streq(l
, "exported-log-rate-limit-interval")) {
3634 r
= parse_boolean(v
);
3636 log_unit_debug(u
, "Failed to parse exported log rate limit interval %s, ignoring.", v
);
3638 u
->exported_log_rate_limit_interval
= r
;
3642 } else if (streq(l
, "exported-log-rate-limit-burst")) {
3644 r
= parse_boolean(v
);
3646 log_unit_debug(u
, "Failed to parse exported log rate limit burst %s, ignoring.", v
);
3648 u
->exported_log_rate_limit_burst
= r
;
3652 } else if (STR_IN_SET(l
, "cpu-usage-base", "cpuacct-usage-base")) {
3654 r
= safe_atou64(v
, &u
->cpu_usage_base
);
3656 log_unit_debug(u
, "Failed to parse CPU usage base %s, ignoring.", v
);
3660 } else if (streq(l
, "cpu-usage-last")) {
3662 r
= safe_atou64(v
, &u
->cpu_usage_last
);
3664 log_unit_debug(u
, "Failed to read CPU usage last %s, ignoring.", v
);
3668 } else if (streq(l
, "oom-kill-last")) {
3670 r
= safe_atou64(v
, &u
->oom_kill_last
);
3672 log_unit_debug(u
, "Failed to read OOM kill last %s, ignoring.", v
);
3676 } else if (streq(l
, "cgroup")) {
3678 r
= unit_set_cgroup_path(u
, v
);
3680 log_unit_debug_errno(u
, r
, "Failed to set cgroup path %s, ignoring: %m", v
);
3682 (void) unit_watch_cgroup(u
);
3683 (void) unit_watch_cgroup_memory(u
);
3686 } else if (streq(l
, "cgroup-realized")) {
3689 b
= parse_boolean(v
);
3691 log_unit_debug(u
, "Failed to parse cgroup-realized bool %s, ignoring.", v
);
3693 u
->cgroup_realized
= b
;
3697 } else if (streq(l
, "cgroup-realized-mask")) {
3699 r
= cg_mask_from_string(v
, &u
->cgroup_realized_mask
);
3701 log_unit_debug(u
, "Failed to parse cgroup-realized-mask %s, ignoring.", v
);
3704 } else if (streq(l
, "cgroup-enabled-mask")) {
3706 r
= cg_mask_from_string(v
, &u
->cgroup_enabled_mask
);
3708 log_unit_debug(u
, "Failed to parse cgroup-enabled-mask %s, ignoring.", v
);
3711 } else if (streq(l
, "cgroup-invalidated-mask")) {
3713 r
= cg_mask_from_string(v
, &u
->cgroup_invalidated_mask
);
3715 log_unit_debug(u
, "Failed to parse cgroup-invalidated-mask %s, ignoring.", v
);
3718 } else if (streq(l
, "ref-uid")) {
3721 r
= parse_uid(v
, &uid
);
3723 log_unit_debug(u
, "Failed to parse referenced UID %s, ignoring.", v
);
3725 unit_ref_uid_gid(u
, uid
, GID_INVALID
);
3729 } else if (streq(l
, "ref-gid")) {
3732 r
= parse_gid(v
, &gid
);
3734 log_unit_debug(u
, "Failed to parse referenced GID %s, ignoring.", v
);
3736 unit_ref_uid_gid(u
, UID_INVALID
, gid
);
3740 } else if (streq(l
, "ref")) {
3742 r
= strv_extend(&u
->deserialized_refs
, v
);
3747 } else if (streq(l
, "invocation-id")) {
3750 r
= sd_id128_from_string(v
, &id
);
3752 log_unit_debug(u
, "Failed to parse invocation id %s, ignoring.", v
);
3754 r
= unit_set_invocation_id(u
, id
);
3756 log_unit_warning_errno(u
, r
, "Failed to set invocation ID for unit: %m");
3762 /* Check if this is an IP accounting metric serialization field */
3763 m
= string_table_lookup(ip_accounting_metric_field
, ELEMENTSOF(ip_accounting_metric_field
), l
);
3767 r
= safe_atou64(v
, &c
);
3769 log_unit_debug(u
, "Failed to parse IP accounting value %s, ignoring.", v
);
3771 u
->ip_accounting_extra
[m
] = c
;
3775 m
= string_table_lookup(io_accounting_metric_field_base
, ELEMENTSOF(io_accounting_metric_field_base
), l
);
3779 r
= safe_atou64(v
, &c
);
3781 log_unit_debug(u
, "Failed to parse IO accounting base value %s, ignoring.", v
);
3783 u
->io_accounting_base
[m
] = c
;
3787 m
= string_table_lookup(io_accounting_metric_field_last
, ELEMENTSOF(io_accounting_metric_field_last
), l
);
3791 r
= safe_atou64(v
, &c
);
3793 log_unit_debug(u
, "Failed to parse IO accounting last value %s, ignoring.", v
);
3795 u
->io_accounting_last
[m
] = c
;
3799 if (unit_can_serialize(u
)) {
3800 r
= exec_runtime_deserialize_compat(u
, l
, v
, fds
);
3802 log_unit_warning(u
, "Failed to deserialize runtime parameter '%s', ignoring.", l
);
3806 /* Returns positive if key was handled by the call */
3810 r
= UNIT_VTABLE(u
)->deserialize_item(u
, l
, v
, fds
);
3812 log_unit_warning(u
, "Failed to deserialize unit parameter '%s', ignoring.", l
);
3816 /* Versions before 228 did not carry a state change timestamp. In this case, take the current time. This is
3817 * useful, so that timeouts based on this timestamp don't trigger too early, and is in-line with the logic from
3818 * before 228 where the base for timeouts was not persistent across reboots. */
3820 if (!dual_timestamp_is_set(&u
->state_change_timestamp
))
3821 dual_timestamp_get(&u
->state_change_timestamp
);
3823 /* Let's make sure that everything that is deserialized also gets any potential new cgroup settings applied
3824 * after we are done. For that we invalidate anything already realized, so that we can realize it again. */
3825 unit_invalidate_cgroup(u
, _CGROUP_MASK_ALL
);
3826 unit_invalidate_cgroup_bpf(u
);
3831 int unit_deserialize_skip(FILE *f
) {
3835 /* Skip serialized data for this unit. We don't know what it is. */
3838 _cleanup_free_
char *line
= NULL
;
3841 r
= read_line(f
, LONG_LINE_MAX
, &line
);
3843 return log_error_errno(r
, "Failed to read serialization line: %m");
3855 int unit_add_node_dependency(Unit
*u
, const char *what
, bool wants
, UnitDependency dep
, UnitDependencyMask mask
) {
3857 _cleanup_free_
char *e
= NULL
;
3862 /* Adds in links to the device node that this unit is based on */
3866 if (!is_device_path(what
))
3869 /* When device units aren't supported (such as in a
3870 * container), don't create dependencies on them. */
3871 if (!unit_type_supported(UNIT_DEVICE
))
3874 r
= unit_name_from_path(what
, ".device", &e
);
3878 r
= manager_load_unit(u
->manager
, e
, NULL
, NULL
, &device
);
3882 if (dep
== UNIT_REQUIRES
&& device_shall_be_bound_by(device
, u
))
3883 dep
= UNIT_BINDS_TO
;
3885 r
= unit_add_two_dependencies(u
, UNIT_AFTER
,
3886 MANAGER_IS_SYSTEM(u
->manager
) ? dep
: UNIT_WANTS
,
3887 device
, true, mask
);
3892 r
= unit_add_dependency(device
, UNIT_WANTS
, u
, false, mask
);
3900 int unit_coldplug(Unit
*u
) {
3906 /* Make sure we don't enter a loop, when coldplugging recursively. */
3910 u
->coldplugged
= true;
3912 STRV_FOREACH(i
, u
->deserialized_refs
) {
3913 q
= bus_unit_track_add_name(u
, *i
);
3914 if (q
< 0 && r
>= 0)
3917 u
->deserialized_refs
= strv_free(u
->deserialized_refs
);
3919 if (UNIT_VTABLE(u
)->coldplug
) {
3920 q
= UNIT_VTABLE(u
)->coldplug(u
);
3921 if (q
< 0 && r
>= 0)
3926 q
= job_coldplug(u
->job
);
3927 if (q
< 0 && r
>= 0)
3934 void unit_catchup(Unit
*u
) {
3937 if (UNIT_VTABLE(u
)->catchup
)
3938 UNIT_VTABLE(u
)->catchup(u
);
3941 static bool fragment_mtime_newer(const char *path
, usec_t mtime
, bool path_masked
) {
3947 /* If the source is some virtual kernel file system, then we assume we watch it anyway, and hence pretend we
3948 * are never out-of-date. */
3949 if (PATH_STARTSWITH_SET(path
, "/proc", "/sys"))
3952 if (stat(path
, &st
) < 0)
3953 /* What, cannot access this anymore? */
3957 /* For masked files check if they are still so */
3958 return !null_or_empty(&st
);
3960 /* For non-empty files check the mtime */
3961 return timespec_load(&st
.st_mtim
) > mtime
;
3966 bool unit_need_daemon_reload(Unit
*u
) {
3967 _cleanup_strv_free_
char **t
= NULL
;
3972 /* For unit files, we allow masking… */
3973 if (fragment_mtime_newer(u
->fragment_path
, u
->fragment_mtime
,
3974 u
->load_state
== UNIT_MASKED
))
3977 /* Source paths should not be masked… */
3978 if (fragment_mtime_newer(u
->source_path
, u
->source_mtime
, false))
3981 if (u
->load_state
== UNIT_LOADED
)
3982 (void) unit_find_dropin_paths(u
, &t
);
3983 if (!strv_equal(u
->dropin_paths
, t
))
3986 /* … any drop-ins that are masked are simply omitted from the list. */
3987 STRV_FOREACH(path
, u
->dropin_paths
)
3988 if (fragment_mtime_newer(*path
, u
->dropin_mtime
, false))
3994 void unit_reset_failed(Unit
*u
) {
3997 if (UNIT_VTABLE(u
)->reset_failed
)
3998 UNIT_VTABLE(u
)->reset_failed(u
);
4000 RATELIMIT_RESET(u
->start_limit
);
4001 u
->start_limit_hit
= false;
4004 Unit
*unit_following(Unit
*u
) {
4007 if (UNIT_VTABLE(u
)->following
)
4008 return UNIT_VTABLE(u
)->following(u
);
4013 bool unit_stop_pending(Unit
*u
) {
4016 /* This call does check the current state of the unit. It's
4017 * hence useful to be called from state change calls of the
4018 * unit itself, where the state isn't updated yet. This is
4019 * different from unit_inactive_or_pending() which checks both
4020 * the current state and for a queued job. */
4022 return u
->job
&& u
->job
->type
== JOB_STOP
;
4025 bool unit_inactive_or_pending(Unit
*u
) {
4028 /* Returns true if the unit is inactive or going down */
4030 if (UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(u
)))
4033 if (unit_stop_pending(u
))
4039 bool unit_active_or_pending(Unit
*u
) {
4042 /* Returns true if the unit is active or going up */
4044 if (UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(u
)))
4048 IN_SET(u
->job
->type
, JOB_START
, JOB_RELOAD_OR_START
, JOB_RESTART
))
4054 bool unit_will_restart_default(Unit
*u
) {
4059 if (u
->job
->type
== JOB_START
)
4065 bool unit_will_restart(Unit
*u
) {
4068 if (!UNIT_VTABLE(u
)->will_restart
)
4071 return UNIT_VTABLE(u
)->will_restart(u
);
4074 int unit_kill(Unit
*u
, KillWho w
, int signo
, sd_bus_error
*error
) {
4076 assert(w
>= 0 && w
< _KILL_WHO_MAX
);
4077 assert(SIGNAL_VALID(signo
));
4079 if (!UNIT_VTABLE(u
)->kill
)
4082 return UNIT_VTABLE(u
)->kill(u
, w
, signo
, error
);
4085 static Set
*unit_pid_set(pid_t main_pid
, pid_t control_pid
) {
4086 _cleanup_set_free_ Set
*pid_set
= NULL
;
4089 pid_set
= set_new(NULL
);
4093 /* Exclude the main/control pids from being killed via the cgroup */
4095 r
= set_put(pid_set
, PID_TO_PTR(main_pid
));
4100 if (control_pid
> 0) {
4101 r
= set_put(pid_set
, PID_TO_PTR(control_pid
));
4106 return TAKE_PTR(pid_set
);
4109 int unit_kill_common(
4115 sd_bus_error
*error
) {
4118 bool killed
= false;
4120 if (IN_SET(who
, KILL_MAIN
, KILL_MAIN_FAIL
)) {
4122 return sd_bus_error_setf(error
, BUS_ERROR_NO_SUCH_PROCESS
, "%s units have no main processes", unit_type_to_string(u
->type
));
4123 else if (main_pid
== 0)
4124 return sd_bus_error_set_const(error
, BUS_ERROR_NO_SUCH_PROCESS
, "No main process to kill");
4127 if (IN_SET(who
, KILL_CONTROL
, KILL_CONTROL_FAIL
)) {
4128 if (control_pid
< 0)
4129 return sd_bus_error_setf(error
, BUS_ERROR_NO_SUCH_PROCESS
, "%s units have no control processes", unit_type_to_string(u
->type
));
4130 else if (control_pid
== 0)
4131 return sd_bus_error_set_const(error
, BUS_ERROR_NO_SUCH_PROCESS
, "No control process to kill");
4134 if (IN_SET(who
, KILL_CONTROL
, KILL_CONTROL_FAIL
, KILL_ALL
, KILL_ALL_FAIL
))
4135 if (control_pid
> 0) {
4136 if (kill(control_pid
, signo
) < 0)
4142 if (IN_SET(who
, KILL_MAIN
, KILL_MAIN_FAIL
, KILL_ALL
, KILL_ALL_FAIL
))
4144 if (kill(main_pid
, signo
) < 0)
4150 if (IN_SET(who
, KILL_ALL
, KILL_ALL_FAIL
) && u
->cgroup_path
) {
4151 _cleanup_set_free_ Set
*pid_set
= NULL
;
4154 /* Exclude the main/control pids from being killed via the cgroup */
4155 pid_set
= unit_pid_set(main_pid
, control_pid
);
4159 q
= cg_kill_recursive(SYSTEMD_CGROUP_CONTROLLER
, u
->cgroup_path
, signo
, 0, pid_set
, NULL
, NULL
);
4160 if (q
< 0 && !IN_SET(q
, -EAGAIN
, -ESRCH
, -ENOENT
))
4166 if (r
== 0 && !killed
&& IN_SET(who
, KILL_ALL_FAIL
, KILL_CONTROL_FAIL
))
4172 int unit_following_set(Unit
*u
, Set
**s
) {
4176 if (UNIT_VTABLE(u
)->following_set
)
4177 return UNIT_VTABLE(u
)->following_set(u
, s
);
4183 UnitFileState
unit_get_unit_file_state(Unit
*u
) {
4188 if (u
->unit_file_state
< 0 && u
->fragment_path
) {
4189 r
= unit_file_get_state(
4190 u
->manager
->unit_file_scope
,
4193 &u
->unit_file_state
);
4195 u
->unit_file_state
= UNIT_FILE_BAD
;
4198 return u
->unit_file_state
;
4201 int unit_get_unit_file_preset(Unit
*u
) {
4204 if (u
->unit_file_preset
< 0 && u
->fragment_path
)
4205 u
->unit_file_preset
= unit_file_query_preset(
4206 u
->manager
->unit_file_scope
,
4208 basename(u
->fragment_path
));
4210 return u
->unit_file_preset
;
4213 Unit
* unit_ref_set(UnitRef
*ref
, Unit
*source
, Unit
*target
) {
4219 unit_ref_unset(ref
);
4221 ref
->source
= source
;
4222 ref
->target
= target
;
4223 LIST_PREPEND(refs_by_target
, target
->refs_by_target
, ref
);
4227 void unit_ref_unset(UnitRef
*ref
) {
4233 /* We are about to drop a reference to the unit, make sure the garbage collection has a look at it as it might
4234 * be unreferenced now. */
4235 unit_add_to_gc_queue(ref
->target
);
4237 LIST_REMOVE(refs_by_target
, ref
->target
->refs_by_target
, ref
);
4238 ref
->source
= ref
->target
= NULL
;
4241 static int user_from_unit_name(Unit
*u
, char **ret
) {
4243 static const uint8_t hash_key
[] = {
4244 0x58, 0x1a, 0xaf, 0xe6, 0x28, 0x58, 0x4e, 0x96,
4245 0xb4, 0x4e, 0xf5, 0x3b, 0x8c, 0x92, 0x07, 0xec
4248 _cleanup_free_
char *n
= NULL
;
4251 r
= unit_name_to_prefix(u
->id
, &n
);
4255 if (valid_user_group_name(n
)) {
4260 /* If we can't use the unit name as a user name, then let's hash it and use that */
4261 if (asprintf(ret
, "_du%016" PRIx64
, siphash24(n
, strlen(n
), hash_key
)) < 0)
4267 int unit_patch_contexts(Unit
*u
) {
4275 /* Patch in the manager defaults into the exec and cgroup
4276 * contexts, _after_ the rest of the settings have been
4279 ec
= unit_get_exec_context(u
);
4281 /* This only copies in the ones that need memory */
4282 for (i
= 0; i
< _RLIMIT_MAX
; i
++)
4283 if (u
->manager
->rlimit
[i
] && !ec
->rlimit
[i
]) {
4284 ec
->rlimit
[i
] = newdup(struct rlimit
, u
->manager
->rlimit
[i
], 1);
4289 if (MANAGER_IS_USER(u
->manager
) &&
4290 !ec
->working_directory
) {
4292 r
= get_home_dir(&ec
->working_directory
);
4296 /* Allow user services to run, even if the
4297 * home directory is missing */
4298 ec
->working_directory_missing_ok
= true;
4301 if (ec
->private_devices
)
4302 ec
->capability_bounding_set
&= ~((UINT64_C(1) << CAP_MKNOD
) | (UINT64_C(1) << CAP_SYS_RAWIO
));
4304 if (ec
->protect_kernel_modules
)
4305 ec
->capability_bounding_set
&= ~(UINT64_C(1) << CAP_SYS_MODULE
);
4307 if (ec
->dynamic_user
) {
4309 r
= user_from_unit_name(u
, &ec
->user
);
4315 ec
->group
= strdup(ec
->user
);
4320 /* If the dynamic user option is on, let's make sure that the unit can't leave its
4321 * UID/GID around in the file system or on IPC objects. Hence enforce a strict
4324 ec
->private_tmp
= true;
4325 ec
->remove_ipc
= true;
4326 ec
->protect_system
= PROTECT_SYSTEM_STRICT
;
4327 if (ec
->protect_home
== PROTECT_HOME_NO
)
4328 ec
->protect_home
= PROTECT_HOME_READ_ONLY
;
4330 /* Make sure this service can neither benefit from SUID/SGID binaries nor create
4332 ec
->no_new_privileges
= true;
4333 ec
->restrict_suid_sgid
= true;
4337 cc
= unit_get_cgroup_context(u
);
4340 if (ec
->private_devices
&&
4341 cc
->device_policy
== CGROUP_AUTO
)
4342 cc
->device_policy
= CGROUP_CLOSED
;
4344 if (ec
->root_image
&&
4345 (cc
->device_policy
!= CGROUP_AUTO
|| cc
->device_allow
)) {
4347 /* When RootImage= is specified, the following devices are touched. */
4348 r
= cgroup_add_device_allow(cc
, "/dev/loop-control", "rw");
4352 r
= cgroup_add_device_allow(cc
, "block-loop", "rwm");
4356 r
= cgroup_add_device_allow(cc
, "block-blkext", "rwm");
4365 ExecContext
*unit_get_exec_context(Unit
*u
) {
4372 offset
= UNIT_VTABLE(u
)->exec_context_offset
;
4376 return (ExecContext
*) ((uint8_t*) u
+ offset
);
4379 KillContext
*unit_get_kill_context(Unit
*u
) {
4386 offset
= UNIT_VTABLE(u
)->kill_context_offset
;
4390 return (KillContext
*) ((uint8_t*) u
+ offset
);
4393 CGroupContext
*unit_get_cgroup_context(Unit
*u
) {
4399 offset
= UNIT_VTABLE(u
)->cgroup_context_offset
;
4403 return (CGroupContext
*) ((uint8_t*) u
+ offset
);
4406 ExecRuntime
*unit_get_exec_runtime(Unit
*u
) {
4412 offset
= UNIT_VTABLE(u
)->exec_runtime_offset
;
4416 return *(ExecRuntime
**) ((uint8_t*) u
+ offset
);
4419 static const char* unit_drop_in_dir(Unit
*u
, UnitWriteFlags flags
) {
4422 if (UNIT_WRITE_FLAGS_NOOP(flags
))
4425 if (u
->transient
) /* Redirect drop-ins for transient units always into the transient directory. */
4426 return u
->manager
->lookup_paths
.transient
;
4428 if (flags
& UNIT_PERSISTENT
)
4429 return u
->manager
->lookup_paths
.persistent_control
;
4431 if (flags
& UNIT_RUNTIME
)
4432 return u
->manager
->lookup_paths
.runtime_control
;
4437 char* unit_escape_setting(const char *s
, UnitWriteFlags flags
, char **buf
) {
4443 /* Escapes the input string as requested. Returns the escaped string. If 'buf' is specified then the allocated
4444 * return buffer pointer is also written to *buf, except if no escaping was necessary, in which case *buf is
4445 * set to NULL, and the input pointer is returned as-is. This means the return value always contains a properly
4446 * escaped version, but *buf when passed only contains a pointer if an allocation was necessary. If *buf is
4447 * not specified, then the return value always needs to be freed. Callers can use this to optimize memory
4450 if (flags
& UNIT_ESCAPE_SPECIFIERS
) {
4451 ret
= specifier_escape(s
);
4458 if (flags
& UNIT_ESCAPE_C
) {
4471 return ret
?: (char*) s
;
4474 return ret
?: strdup(s
);
4477 char* unit_concat_strv(char **l
, UnitWriteFlags flags
) {
4478 _cleanup_free_
char *result
= NULL
;
4479 size_t n
= 0, allocated
= 0;
4482 /* Takes a list of strings, escapes them, and concatenates them. This may be used to format command lines in a
4483 * way suitable for ExecStart= stanzas */
4485 STRV_FOREACH(i
, l
) {
4486 _cleanup_free_
char *buf
= NULL
;
4491 p
= unit_escape_setting(*i
, flags
, &buf
);
4495 a
= (n
> 0) + 1 + strlen(p
) + 1; /* separating space + " + entry + " */
4496 if (!GREEDY_REALLOC(result
, allocated
, n
+ a
+ 1))
4510 if (!GREEDY_REALLOC(result
, allocated
, n
+ 1))
4515 return TAKE_PTR(result
);
4518 int unit_write_setting(Unit
*u
, UnitWriteFlags flags
, const char *name
, const char *data
) {
4519 _cleanup_free_
char *p
= NULL
, *q
= NULL
, *escaped
= NULL
;
4520 const char *dir
, *wrapped
;
4527 if (UNIT_WRITE_FLAGS_NOOP(flags
))
4530 data
= unit_escape_setting(data
, flags
, &escaped
);
4534 /* Prefix the section header. If we are writing this out as transient file, then let's suppress this if the
4535 * previous section header is the same */
4537 if (flags
& UNIT_PRIVATE
) {
4538 if (!UNIT_VTABLE(u
)->private_section
)
4541 if (!u
->transient_file
|| u
->last_section_private
< 0)
4542 data
= strjoina("[", UNIT_VTABLE(u
)->private_section
, "]\n", data
);
4543 else if (u
->last_section_private
== 0)
4544 data
= strjoina("\n[", UNIT_VTABLE(u
)->private_section
, "]\n", data
);
4546 if (!u
->transient_file
|| u
->last_section_private
< 0)
4547 data
= strjoina("[Unit]\n", data
);
4548 else if (u
->last_section_private
> 0)
4549 data
= strjoina("\n[Unit]\n", data
);
4552 if (u
->transient_file
) {
4553 /* When this is a transient unit file in creation, then let's not create a new drop-in but instead
4554 * write to the transient unit file. */
4555 fputs(data
, u
->transient_file
);
4557 if (!endswith(data
, "\n"))
4558 fputc('\n', u
->transient_file
);
4560 /* Remember which section we wrote this entry to */
4561 u
->last_section_private
= !!(flags
& UNIT_PRIVATE
);
4565 dir
= unit_drop_in_dir(u
, flags
);
4569 wrapped
= strjoina("# This is a drop-in unit file extension, created via \"systemctl set-property\"\n"
4570 "# or an equivalent operation. Do not edit.\n",
4574 r
= drop_in_file(dir
, u
->id
, 50, name
, &p
, &q
);
4578 (void) mkdir_p_label(p
, 0755);
4580 /* Make sure the drop-in dir is registered in our path cache. This way we don't need to stupidly
4581 * recreate the cache after every drop-in we write. */
4582 if (u
->manager
->unit_path_cache
) {
4583 r
= set_put_strdup(u
->manager
->unit_path_cache
, p
);
4588 r
= write_string_file_atomic_label(q
, wrapped
);
4592 r
= strv_push(&u
->dropin_paths
, q
);
4597 strv_uniq(u
->dropin_paths
);
4599 u
->dropin_mtime
= now(CLOCK_REALTIME
);
4604 int unit_write_settingf(Unit
*u
, UnitWriteFlags flags
, const char *name
, const char *format
, ...) {
4605 _cleanup_free_
char *p
= NULL
;
4613 if (UNIT_WRITE_FLAGS_NOOP(flags
))
4616 va_start(ap
, format
);
4617 r
= vasprintf(&p
, format
, ap
);
4623 return unit_write_setting(u
, flags
, name
, p
);
4626 int unit_make_transient(Unit
*u
) {
4627 _cleanup_free_
char *path
= NULL
;
4632 if (!UNIT_VTABLE(u
)->can_transient
)
4635 (void) mkdir_p_label(u
->manager
->lookup_paths
.transient
, 0755);
4637 path
= path_join(u
->manager
->lookup_paths
.transient
, u
->id
);
4641 /* Let's open the file we'll write the transient settings into. This file is kept open as long as we are
4642 * creating the transient, and is closed in unit_load(), as soon as we start loading the file. */
4644 RUN_WITH_UMASK(0022) {
4645 f
= fopen(path
, "we");
4650 safe_fclose(u
->transient_file
);
4651 u
->transient_file
= f
;
4653 free_and_replace(u
->fragment_path
, path
);
4655 u
->source_path
= mfree(u
->source_path
);
4656 u
->dropin_paths
= strv_free(u
->dropin_paths
);
4657 u
->fragment_mtime
= u
->source_mtime
= u
->dropin_mtime
= 0;
4659 u
->load_state
= UNIT_STUB
;
4661 u
->transient
= true;
4663 unit_add_to_dbus_queue(u
);
4664 unit_add_to_gc_queue(u
);
4666 fputs("# This is a transient unit file, created programmatically via the systemd API. Do not edit.\n",
4672 static int log_kill(pid_t pid
, int sig
, void *userdata
) {
4673 _cleanup_free_
char *comm
= NULL
;
4675 (void) get_process_comm(pid
, &comm
);
4677 /* Don't log about processes marked with brackets, under the assumption that these are temporary processes
4678 only, like for example systemd's own PAM stub process. */
4679 if (comm
&& comm
[0] == '(')
4682 log_unit_notice(userdata
,
4683 "Killing process " PID_FMT
" (%s) with signal SIG%s.",
4686 signal_to_string(sig
));
4691 static int operation_to_signal(KillContext
*c
, KillOperation k
) {
4696 case KILL_TERMINATE
:
4697 case KILL_TERMINATE_AND_LOG
:
4698 return c
->kill_signal
;
4701 return c
->final_kill_signal
;
4704 return c
->watchdog_signal
;
4707 assert_not_reached("KillOperation unknown");
4711 int unit_kill_context(
4717 bool main_pid_alien
) {
4719 bool wait_for_exit
= false, send_sighup
;
4720 cg_kill_log_func_t log_func
= NULL
;
4726 /* Kill the processes belonging to this unit, in preparation for shutting the unit down.
4727 * Returns > 0 if we killed something worth waiting for, 0 otherwise. */
4729 if (c
->kill_mode
== KILL_NONE
)
4732 sig
= operation_to_signal(c
, k
);
4736 IN_SET(k
, KILL_TERMINATE
, KILL_TERMINATE_AND_LOG
) &&
4739 if (k
!= KILL_TERMINATE
|| IN_SET(sig
, SIGKILL
, SIGABRT
))
4740 log_func
= log_kill
;
4744 log_func(main_pid
, sig
, u
);
4746 r
= kill_and_sigcont(main_pid
, sig
);
4747 if (r
< 0 && r
!= -ESRCH
) {
4748 _cleanup_free_
char *comm
= NULL
;
4749 (void) get_process_comm(main_pid
, &comm
);
4751 log_unit_warning_errno(u
, r
, "Failed to kill main process " PID_FMT
" (%s), ignoring: %m", main_pid
, strna(comm
));
4753 if (!main_pid_alien
)
4754 wait_for_exit
= true;
4756 if (r
!= -ESRCH
&& send_sighup
)
4757 (void) kill(main_pid
, SIGHUP
);
4761 if (control_pid
> 0) {
4763 log_func(control_pid
, sig
, u
);
4765 r
= kill_and_sigcont(control_pid
, sig
);
4766 if (r
< 0 && r
!= -ESRCH
) {
4767 _cleanup_free_
char *comm
= NULL
;
4768 (void) get_process_comm(control_pid
, &comm
);
4770 log_unit_warning_errno(u
, r
, "Failed to kill control process " PID_FMT
" (%s), ignoring: %m", control_pid
, strna(comm
));
4772 wait_for_exit
= true;
4774 if (r
!= -ESRCH
&& send_sighup
)
4775 (void) kill(control_pid
, SIGHUP
);
4779 if (u
->cgroup_path
&&
4780 (c
->kill_mode
== KILL_CONTROL_GROUP
|| (c
->kill_mode
== KILL_MIXED
&& k
== KILL_KILL
))) {
4781 _cleanup_set_free_ Set
*pid_set
= NULL
;
4783 /* Exclude the main/control pids from being killed via the cgroup */
4784 pid_set
= unit_pid_set(main_pid
, control_pid
);
4788 r
= cg_kill_recursive(SYSTEMD_CGROUP_CONTROLLER
, u
->cgroup_path
,
4790 CGROUP_SIGCONT
|CGROUP_IGNORE_SELF
,
4794 if (!IN_SET(r
, -EAGAIN
, -ESRCH
, -ENOENT
))
4795 log_unit_warning_errno(u
, r
, "Failed to kill control group %s, ignoring: %m", u
->cgroup_path
);
4799 /* FIXME: For now, on the legacy hierarchy, we will not wait for the cgroup members to die if
4800 * we are running in a container or if this is a delegation unit, simply because cgroup
4801 * notification is unreliable in these cases. It doesn't work at all in containers, and outside
4802 * of containers it can be confused easily by left-over directories in the cgroup — which
4803 * however should not exist in non-delegated units. On the unified hierarchy that's different,
4804 * there we get proper events. Hence rely on them. */
4806 if (cg_unified_controller(SYSTEMD_CGROUP_CONTROLLER
) > 0 ||
4807 (detect_container() == 0 && !unit_cgroup_delegate(u
)))
4808 wait_for_exit
= true;
4813 pid_set
= unit_pid_set(main_pid
, control_pid
);
4817 cg_kill_recursive(SYSTEMD_CGROUP_CONTROLLER
, u
->cgroup_path
,
4826 return wait_for_exit
;
4829 int unit_require_mounts_for(Unit
*u
, const char *path
, UnitDependencyMask mask
) {
4830 _cleanup_free_
char *p
= NULL
;
4831 UnitDependencyInfo di
;
4837 /* Registers a unit for requiring a certain path and all its prefixes. We keep a hashtable of these paths in
4838 * the unit (from the path to the UnitDependencyInfo structure indicating how to the dependency came to
4839 * be). However, we build a prefix table for all possible prefixes so that new appearing mount units can easily
4840 * determine which units to make themselves a dependency of. */
4842 if (!path_is_absolute(path
))
4845 r
= hashmap_ensure_allocated(&u
->requires_mounts_for
, &path_hash_ops
);
4853 path
= path_simplify(p
, true);
4855 if (!path_is_normalized(path
))
4858 if (hashmap_contains(u
->requires_mounts_for
, path
))
4861 di
= (UnitDependencyInfo
) {
4865 r
= hashmap_put(u
->requires_mounts_for
, path
, di
.data
);
4870 char prefix
[strlen(path
) + 1];
4871 PATH_FOREACH_PREFIX_MORE(prefix
, path
) {
4874 x
= hashmap_get(u
->manager
->units_requiring_mounts_for
, prefix
);
4876 _cleanup_free_
char *q
= NULL
;
4878 r
= hashmap_ensure_allocated(&u
->manager
->units_requiring_mounts_for
, &path_hash_ops
);
4890 r
= hashmap_put(u
->manager
->units_requiring_mounts_for
, q
, x
);
4906 int unit_setup_exec_runtime(Unit
*u
) {
4914 offset
= UNIT_VTABLE(u
)->exec_runtime_offset
;
4917 /* Check if there already is an ExecRuntime for this unit? */
4918 rt
= (ExecRuntime
**) ((uint8_t*) u
+ offset
);
4922 /* Try to get it from somebody else */
4923 HASHMAP_FOREACH_KEY(v
, other
, u
->dependencies
[UNIT_JOINS_NAMESPACE_OF
], i
) {
4924 r
= exec_runtime_acquire(u
->manager
, NULL
, other
->id
, false, rt
);
4929 return exec_runtime_acquire(u
->manager
, unit_get_exec_context(u
), u
->id
, true, rt
);
4932 int unit_setup_dynamic_creds(Unit
*u
) {
4934 DynamicCreds
*dcreds
;
4939 offset
= UNIT_VTABLE(u
)->dynamic_creds_offset
;
4941 dcreds
= (DynamicCreds
*) ((uint8_t*) u
+ offset
);
4943 ec
= unit_get_exec_context(u
);
4946 if (!ec
->dynamic_user
)
4949 return dynamic_creds_acquire(dcreds
, u
->manager
, ec
->user
, ec
->group
);
4952 bool unit_type_supported(UnitType t
) {
4953 if (_unlikely_(t
< 0))
4955 if (_unlikely_(t
>= _UNIT_TYPE_MAX
))
4958 if (!unit_vtable
[t
]->supported
)
4961 return unit_vtable
[t
]->supported();
4964 void unit_warn_if_dir_nonempty(Unit
*u
, const char* where
) {
4970 r
= dir_is_empty(where
);
4971 if (r
> 0 || r
== -ENOTDIR
)
4974 log_unit_warning_errno(u
, r
, "Failed to check directory %s: %m", where
);
4978 log_struct(LOG_NOTICE
,
4979 "MESSAGE_ID=" SD_MESSAGE_OVERMOUNTING_STR
,
4981 LOG_UNIT_INVOCATION_ID(u
),
4982 LOG_UNIT_MESSAGE(u
, "Directory %s to mount over is not empty, mounting anyway.", where
),
4986 int unit_fail_if_noncanonical(Unit
*u
, const char* where
) {
4987 _cleanup_free_
char *canonical_where
= NULL
;
4993 r
= chase_symlinks(where
, NULL
, CHASE_NONEXISTENT
, &canonical_where
);
4995 log_unit_debug_errno(u
, r
, "Failed to check %s for symlinks, ignoring: %m", where
);
4999 /* We will happily ignore a trailing slash (or any redundant slashes) */
5000 if (path_equal(where
, canonical_where
))
5003 /* No need to mention "." or "..", they would already have been rejected by unit_name_from_path() */
5005 "MESSAGE_ID=" SD_MESSAGE_OVERMOUNTING_STR
,
5007 LOG_UNIT_INVOCATION_ID(u
),
5008 LOG_UNIT_MESSAGE(u
, "Mount path %s is not canonical (contains a symlink).", where
),
5014 bool unit_is_pristine(Unit
*u
) {
5017 /* Check if the unit already exists or is already around,
5018 * in a number of different ways. Note that to cater for unit
5019 * types such as slice, we are generally fine with units that
5020 * are marked UNIT_LOADED even though nothing was actually
5021 * loaded, as those unit types don't require a file on disk. */
5023 return !(!IN_SET(u
->load_state
, UNIT_NOT_FOUND
, UNIT_LOADED
) ||
5026 !strv_isempty(u
->dropin_paths
) ||
5031 pid_t
unit_control_pid(Unit
*u
) {
5034 if (UNIT_VTABLE(u
)->control_pid
)
5035 return UNIT_VTABLE(u
)->control_pid(u
);
5040 pid_t
unit_main_pid(Unit
*u
) {
5043 if (UNIT_VTABLE(u
)->main_pid
)
5044 return UNIT_VTABLE(u
)->main_pid(u
);
5049 static void unit_unref_uid_internal(
5053 void (*_manager_unref_uid
)(Manager
*m
, uid_t uid
, bool destroy_now
)) {
5057 assert(_manager_unref_uid
);
5059 /* Generic implementation of both unit_unref_uid() and unit_unref_gid(), under the assumption that uid_t and
5060 * gid_t are actually the same time, with the same validity rules.
5062 * Drops a reference to UID/GID from a unit. */
5064 assert_cc(sizeof(uid_t
) == sizeof(gid_t
));
5065 assert_cc(UID_INVALID
== (uid_t
) GID_INVALID
);
5067 if (!uid_is_valid(*ref_uid
))
5070 _manager_unref_uid(u
->manager
, *ref_uid
, destroy_now
);
5071 *ref_uid
= UID_INVALID
;
5074 void unit_unref_uid(Unit
*u
, bool destroy_now
) {
5075 unit_unref_uid_internal(u
, &u
->ref_uid
, destroy_now
, manager_unref_uid
);
5078 void unit_unref_gid(Unit
*u
, bool destroy_now
) {
5079 unit_unref_uid_internal(u
, (uid_t
*) &u
->ref_gid
, destroy_now
, manager_unref_gid
);
5082 static int unit_ref_uid_internal(
5087 int (*_manager_ref_uid
)(Manager
*m
, uid_t uid
, bool clean_ipc
)) {
5093 assert(uid_is_valid(uid
));
5094 assert(_manager_ref_uid
);
5096 /* Generic implementation of both unit_ref_uid() and unit_ref_guid(), under the assumption that uid_t and gid_t
5097 * are actually the same type, and have the same validity rules.
5099 * Adds a reference on a specific UID/GID to this unit. Each unit referencing the same UID/GID maintains a
5100 * reference so that we can destroy the UID/GID's IPC resources as soon as this is requested and the counter
5103 assert_cc(sizeof(uid_t
) == sizeof(gid_t
));
5104 assert_cc(UID_INVALID
== (uid_t
) GID_INVALID
);
5106 if (*ref_uid
== uid
)
5109 if (uid_is_valid(*ref_uid
)) /* Already set? */
5112 r
= _manager_ref_uid(u
->manager
, uid
, clean_ipc
);
5120 int unit_ref_uid(Unit
*u
, uid_t uid
, bool clean_ipc
) {
5121 return unit_ref_uid_internal(u
, &u
->ref_uid
, uid
, clean_ipc
, manager_ref_uid
);
5124 int unit_ref_gid(Unit
*u
, gid_t gid
, bool clean_ipc
) {
5125 return unit_ref_uid_internal(u
, (uid_t
*) &u
->ref_gid
, (uid_t
) gid
, clean_ipc
, manager_ref_gid
);
5128 static int unit_ref_uid_gid_internal(Unit
*u
, uid_t uid
, gid_t gid
, bool clean_ipc
) {
5133 /* Reference both a UID and a GID in one go. Either references both, or neither. */
5135 if (uid_is_valid(uid
)) {
5136 r
= unit_ref_uid(u
, uid
, clean_ipc
);
5141 if (gid_is_valid(gid
)) {
5142 q
= unit_ref_gid(u
, gid
, clean_ipc
);
5145 unit_unref_uid(u
, false);
5151 return r
> 0 || q
> 0;
5154 int unit_ref_uid_gid(Unit
*u
, uid_t uid
, gid_t gid
) {
5160 c
= unit_get_exec_context(u
);
5162 r
= unit_ref_uid_gid_internal(u
, uid
, gid
, c
? c
->remove_ipc
: false);
5164 return log_unit_warning_errno(u
, r
, "Couldn't add UID/GID reference to unit, proceeding without: %m");
5169 void unit_unref_uid_gid(Unit
*u
, bool destroy_now
) {
5172 unit_unref_uid(u
, destroy_now
);
5173 unit_unref_gid(u
, destroy_now
);
5176 void unit_notify_user_lookup(Unit
*u
, uid_t uid
, gid_t gid
) {
5181 /* This is invoked whenever one of the forked off processes let's us know the UID/GID its user name/group names
5182 * resolved to. We keep track of which UID/GID is currently assigned in order to be able to destroy its IPC
5183 * objects when no service references the UID/GID anymore. */
5185 r
= unit_ref_uid_gid(u
, uid
, gid
);
5187 unit_add_to_dbus_queue(u
);
5190 int unit_set_invocation_id(Unit
*u
, sd_id128_t id
) {
5195 /* Set the invocation ID for this unit. If we cannot, this will not roll back, but reset the whole thing. */
5197 if (sd_id128_equal(u
->invocation_id
, id
))
5200 if (!sd_id128_is_null(u
->invocation_id
))
5201 (void) hashmap_remove_value(u
->manager
->units_by_invocation_id
, &u
->invocation_id
, u
);
5203 if (sd_id128_is_null(id
)) {
5208 r
= hashmap_ensure_allocated(&u
->manager
->units_by_invocation_id
, &id128_hash_ops
);
5212 u
->invocation_id
= id
;
5213 sd_id128_to_string(id
, u
->invocation_id_string
);
5215 r
= hashmap_put(u
->manager
->units_by_invocation_id
, &u
->invocation_id
, u
);
5222 u
->invocation_id
= SD_ID128_NULL
;
5223 u
->invocation_id_string
[0] = 0;
5227 int unit_acquire_invocation_id(Unit
*u
) {
5233 r
= sd_id128_randomize(&id
);
5235 return log_unit_error_errno(u
, r
, "Failed to generate invocation ID for unit: %m");
5237 r
= unit_set_invocation_id(u
, id
);
5239 return log_unit_error_errno(u
, r
, "Failed to set invocation ID for unit: %m");
5241 unit_add_to_dbus_queue(u
);
5245 int unit_set_exec_params(Unit
*u
, ExecParameters
*p
) {
5251 /* Copy parameters from manager */
5252 r
= manager_get_effective_environment(u
->manager
, &p
->environment
);
5256 p
->confirm_spawn
= manager_get_confirm_spawn(u
->manager
);
5257 p
->cgroup_supported
= u
->manager
->cgroup_supported
;
5258 p
->prefix
= u
->manager
->prefix
;
5259 SET_FLAG(p
->flags
, EXEC_PASS_LOG_UNIT
|EXEC_CHOWN_DIRECTORIES
, MANAGER_IS_SYSTEM(u
->manager
));
5261 /* Copy parameters from unit */
5262 p
->cgroup_path
= u
->cgroup_path
;
5263 SET_FLAG(p
->flags
, EXEC_CGROUP_DELEGATE
, unit_cgroup_delegate(u
));
5268 int unit_fork_helper_process(Unit
*u
, const char *name
, pid_t
*ret
) {
5274 /* Forks off a helper process and makes sure it is a member of the unit's cgroup. Returns == 0 in the child,
5275 * and > 0 in the parent. The pid parameter is always filled in with the child's PID. */
5277 (void) unit_realize_cgroup(u
);
5279 r
= safe_fork(name
, FORK_REOPEN_LOG
, ret
);
5283 (void) default_signals(SIGNALS_CRASH_HANDLER
, SIGNALS_IGNORE
, -1);
5284 (void) ignore_signals(SIGPIPE
, -1);
5286 (void) prctl(PR_SET_PDEATHSIG
, SIGTERM
);
5288 if (u
->cgroup_path
) {
5289 r
= cg_attach_everywhere(u
->manager
->cgroup_supported
, u
->cgroup_path
, 0, NULL
, NULL
);
5291 log_unit_error_errno(u
, r
, "Failed to join unit cgroup %s: %m", u
->cgroup_path
);
5299 static void unit_update_dependency_mask(Unit
*u
, UnitDependency d
, Unit
*other
, UnitDependencyInfo di
) {
5302 assert(d
< _UNIT_DEPENDENCY_MAX
);
5305 if (di
.origin_mask
== 0 && di
.destination_mask
== 0) {
5306 /* No bit set anymore, let's drop the whole entry */
5307 assert_se(hashmap_remove(u
->dependencies
[d
], other
));
5308 log_unit_debug(u
, "%s lost dependency %s=%s", u
->id
, unit_dependency_to_string(d
), other
->id
);
5310 /* Mask was reduced, let's update the entry */
5311 assert_se(hashmap_update(u
->dependencies
[d
], other
, di
.data
) == 0);
5314 void unit_remove_dependencies(Unit
*u
, UnitDependencyMask mask
) {
5319 /* Removes all dependencies u has on other units marked for ownership by 'mask'. */
5324 for (d
= 0; d
< _UNIT_DEPENDENCY_MAX
; d
++) {
5328 UnitDependencyInfo di
;
5334 HASHMAP_FOREACH_KEY(di
.data
, other
, u
->dependencies
[d
], i
) {
5337 if ((di
.origin_mask
& ~mask
) == di
.origin_mask
)
5339 di
.origin_mask
&= ~mask
;
5340 unit_update_dependency_mask(u
, d
, other
, di
);
5342 /* We updated the dependency from our unit to the other unit now. But most dependencies
5343 * imply a reverse dependency. Hence, let's delete that one too. For that we go through
5344 * all dependency types on the other unit and delete all those which point to us and
5345 * have the right mask set. */
5347 for (q
= 0; q
< _UNIT_DEPENDENCY_MAX
; q
++) {
5348 UnitDependencyInfo dj
;
5350 dj
.data
= hashmap_get(other
->dependencies
[q
], u
);
5351 if ((dj
.destination_mask
& ~mask
) == dj
.destination_mask
)
5353 dj
.destination_mask
&= ~mask
;
5355 unit_update_dependency_mask(other
, q
, u
, dj
);
5358 unit_add_to_gc_queue(other
);
5368 static int unit_export_invocation_id(Unit
*u
) {
5374 if (u
->exported_invocation_id
)
5377 if (sd_id128_is_null(u
->invocation_id
))
5380 p
= strjoina("/run/systemd/units/invocation:", u
->id
);
5381 r
= symlink_atomic(u
->invocation_id_string
, p
);
5383 return log_unit_debug_errno(u
, r
, "Failed to create invocation ID symlink %s: %m", p
);
5385 u
->exported_invocation_id
= true;
5389 static int unit_export_log_level_max(Unit
*u
, const ExecContext
*c
) {
5397 if (u
->exported_log_level_max
)
5400 if (c
->log_level_max
< 0)
5403 assert(c
->log_level_max
<= 7);
5405 buf
[0] = '0' + c
->log_level_max
;
5408 p
= strjoina("/run/systemd/units/log-level-max:", u
->id
);
5409 r
= symlink_atomic(buf
, p
);
5411 return log_unit_debug_errno(u
, r
, "Failed to create maximum log level symlink %s: %m", p
);
5413 u
->exported_log_level_max
= true;
5417 static int unit_export_log_extra_fields(Unit
*u
, const ExecContext
*c
) {
5418 _cleanup_close_
int fd
= -1;
5419 struct iovec
*iovec
;
5427 if (u
->exported_log_extra_fields
)
5430 if (c
->n_log_extra_fields
<= 0)
5433 sizes
= newa(le64_t
, c
->n_log_extra_fields
);
5434 iovec
= newa(struct iovec
, c
->n_log_extra_fields
* 2);
5436 for (i
= 0; i
< c
->n_log_extra_fields
; i
++) {
5437 sizes
[i
] = htole64(c
->log_extra_fields
[i
].iov_len
);
5439 iovec
[i
*2] = IOVEC_MAKE(sizes
+ i
, sizeof(le64_t
));
5440 iovec
[i
*2+1] = c
->log_extra_fields
[i
];
5443 p
= strjoina("/run/systemd/units/log-extra-fields:", u
->id
);
5444 pattern
= strjoina(p
, ".XXXXXX");
5446 fd
= mkostemp_safe(pattern
);
5448 return log_unit_debug_errno(u
, fd
, "Failed to create extra fields file %s: %m", p
);
5450 n
= writev(fd
, iovec
, c
->n_log_extra_fields
*2);
5452 r
= log_unit_debug_errno(u
, errno
, "Failed to write extra fields: %m");
5456 (void) fchmod(fd
, 0644);
5458 if (rename(pattern
, p
) < 0) {
5459 r
= log_unit_debug_errno(u
, errno
, "Failed to rename extra fields file: %m");
5463 u
->exported_log_extra_fields
= true;
5467 (void) unlink(pattern
);
5471 static int unit_export_log_rate_limit_interval(Unit
*u
, const ExecContext
*c
) {
5472 _cleanup_free_
char *buf
= NULL
;
5479 if (u
->exported_log_rate_limit_interval
)
5482 if (c
->log_rate_limit_interval_usec
== 0)
5485 p
= strjoina("/run/systemd/units/log-rate-limit-interval:", u
->id
);
5487 if (asprintf(&buf
, "%" PRIu64
, c
->log_rate_limit_interval_usec
) < 0)
5490 r
= symlink_atomic(buf
, p
);
5492 return log_unit_debug_errno(u
, r
, "Failed to create log rate limit interval symlink %s: %m", p
);
5494 u
->exported_log_rate_limit_interval
= true;
5498 static int unit_export_log_rate_limit_burst(Unit
*u
, const ExecContext
*c
) {
5499 _cleanup_free_
char *buf
= NULL
;
5506 if (u
->exported_log_rate_limit_burst
)
5509 if (c
->log_rate_limit_burst
== 0)
5512 p
= strjoina("/run/systemd/units/log-rate-limit-burst:", u
->id
);
5514 if (asprintf(&buf
, "%u", c
->log_rate_limit_burst
) < 0)
5517 r
= symlink_atomic(buf
, p
);
5519 return log_unit_debug_errno(u
, r
, "Failed to create log rate limit burst symlink %s: %m", p
);
5521 u
->exported_log_rate_limit_burst
= true;
5525 void unit_export_state_files(Unit
*u
) {
5526 const ExecContext
*c
;
5533 if (!MANAGER_IS_SYSTEM(u
->manager
))
5536 if (MANAGER_IS_TEST_RUN(u
->manager
))
5539 /* Exports a couple of unit properties to /run/systemd/units/, so that journald can quickly query this data
5540 * from there. Ideally, journald would use IPC to query this, like everybody else, but that's hard, as long as
5541 * the IPC system itself and PID 1 also log to the journal.
5543 * Note that these files really shouldn't be considered API for anyone else, as use a runtime file system as
5544 * IPC replacement is not compatible with today's world of file system namespaces. However, this doesn't really
5545 * apply to communication between the journal and systemd, as we assume that these two daemons live in the same
5546 * namespace at least.
5548 * Note that some of the "files" exported here are actually symlinks and not regular files. Symlinks work
5549 * better for storing small bits of data, in particular as we can write them with two system calls, and read
5552 (void) unit_export_invocation_id(u
);
5554 c
= unit_get_exec_context(u
);
5556 (void) unit_export_log_level_max(u
, c
);
5557 (void) unit_export_log_extra_fields(u
, c
);
5558 (void) unit_export_log_rate_limit_interval(u
, c
);
5559 (void) unit_export_log_rate_limit_burst(u
, c
);
5563 void unit_unlink_state_files(Unit
*u
) {
5571 if (!MANAGER_IS_SYSTEM(u
->manager
))
5574 /* Undoes the effect of unit_export_state() */
5576 if (u
->exported_invocation_id
) {
5577 p
= strjoina("/run/systemd/units/invocation:", u
->id
);
5580 u
->exported_invocation_id
= false;
5583 if (u
->exported_log_level_max
) {
5584 p
= strjoina("/run/systemd/units/log-level-max:", u
->id
);
5587 u
->exported_log_level_max
= false;
5590 if (u
->exported_log_extra_fields
) {
5591 p
= strjoina("/run/systemd/units/extra-fields:", u
->id
);
5594 u
->exported_log_extra_fields
= false;
5597 if (u
->exported_log_rate_limit_interval
) {
5598 p
= strjoina("/run/systemd/units/log-rate-limit-interval:", u
->id
);
5601 u
->exported_log_rate_limit_interval
= false;
5604 if (u
->exported_log_rate_limit_burst
) {
5605 p
= strjoina("/run/systemd/units/log-rate-limit-burst:", u
->id
);
5608 u
->exported_log_rate_limit_burst
= false;
5612 int unit_prepare_exec(Unit
*u
) {
5617 /* Load any custom firewall BPF programs here once to test if they are existing and actually loadable.
5618 * Fail here early since later errors in the call chain unit_realize_cgroup to cgroup_context_apply are ignored. */
5619 r
= bpf_firewall_load_custom(u
);
5623 /* Prepares everything so that we can fork of a process for this unit */
5625 (void) unit_realize_cgroup(u
);
5627 if (u
->reset_accounting
) {
5628 (void) unit_reset_accounting(u
);
5629 u
->reset_accounting
= false;
5632 unit_export_state_files(u
);
5634 r
= unit_setup_exec_runtime(u
);
5638 r
= unit_setup_dynamic_creds(u
);
5645 static int log_leftover(pid_t pid
, int sig
, void *userdata
) {
5646 _cleanup_free_
char *comm
= NULL
;
5648 (void) get_process_comm(pid
, &comm
);
5650 if (comm
&& comm
[0] == '(') /* Most likely our own helper process (PAM?), ignore */
5653 log_unit_warning(userdata
,
5654 "Found left-over process " PID_FMT
" (%s) in control group while starting unit. Ignoring.\n"
5655 "This usually indicates unclean termination of a previous run, or service implementation deficiencies.",
5661 int unit_warn_leftover_processes(Unit
*u
) {
5664 (void) unit_pick_cgroup_path(u
);
5666 if (!u
->cgroup_path
)
5669 return cg_kill_recursive(SYSTEMD_CGROUP_CONTROLLER
, u
->cgroup_path
, 0, 0, NULL
, log_leftover
, u
);
5672 bool unit_needs_console(Unit
*u
) {
5674 UnitActiveState state
;
5678 state
= unit_active_state(u
);
5680 if (UNIT_IS_INACTIVE_OR_FAILED(state
))
5683 if (UNIT_VTABLE(u
)->needs_console
)
5684 return UNIT_VTABLE(u
)->needs_console(u
);
5686 /* If this unit type doesn't implement this call, let's use a generic fallback implementation: */
5687 ec
= unit_get_exec_context(u
);
5691 return exec_context_may_touch_console(ec
);
5694 const char *unit_label_path(Unit
*u
) {
5697 /* Returns the file system path to use for MAC access decisions, i.e. the file to read the SELinux label off
5698 * when validating access checks. */
5700 p
= u
->source_path
?: u
->fragment_path
;
5704 /* If a unit is masked, then don't read the SELinux label of /dev/null, as that really makes no sense */
5705 if (path_equal(p
, "/dev/null"))
5711 int unit_pid_attachable(Unit
*u
, pid_t pid
, sd_bus_error
*error
) {
5716 /* Checks whether the specified PID is generally good for attaching, i.e. a valid PID, not our manager itself,
5717 * and not a kernel thread either */
5719 /* First, a simple range check */
5720 if (!pid_is_valid(pid
))
5721 return sd_bus_error_setf(error
, SD_BUS_ERROR_INVALID_ARGS
, "Process identifier " PID_FMT
" is not valid.", pid
);
5723 /* Some extra safety check */
5724 if (pid
== 1 || pid
== getpid_cached())
5725 return sd_bus_error_setf(error
, SD_BUS_ERROR_INVALID_ARGS
, "Process " PID_FMT
" is a manager process, refusing.", pid
);
5727 /* Don't even begin to bother with kernel threads */
5728 r
= is_kernel_thread(pid
);
5730 return sd_bus_error_setf(error
, SD_BUS_ERROR_UNIX_PROCESS_ID_UNKNOWN
, "Process with ID " PID_FMT
" does not exist.", pid
);
5732 return sd_bus_error_set_errnof(error
, r
, "Failed to determine whether process " PID_FMT
" is a kernel thread: %m", pid
);
5734 return sd_bus_error_setf(error
, SD_BUS_ERROR_INVALID_ARGS
, "Process " PID_FMT
" is a kernel thread, refusing.", pid
);
5739 void unit_log_success(Unit
*u
) {
5742 log_struct(LOG_INFO
,
5743 "MESSAGE_ID=" SD_MESSAGE_UNIT_SUCCESS_STR
,
5745 LOG_UNIT_INVOCATION_ID(u
),
5746 LOG_UNIT_MESSAGE(u
, "Succeeded."));
5749 void unit_log_failure(Unit
*u
, const char *result
) {
5753 log_struct(LOG_WARNING
,
5754 "MESSAGE_ID=" SD_MESSAGE_UNIT_FAILURE_RESULT_STR
,
5756 LOG_UNIT_INVOCATION_ID(u
),
5757 LOG_UNIT_MESSAGE(u
, "Failed with result '%s'.", result
),
5758 "UNIT_RESULT=%s", result
);
5761 void unit_log_skip(Unit
*u
, const char *result
) {
5765 log_struct(LOG_INFO
,
5766 "MESSAGE_ID=" SD_MESSAGE_UNIT_SKIPPED_STR
,
5768 LOG_UNIT_INVOCATION_ID(u
),
5769 LOG_UNIT_MESSAGE(u
, "Skipped due to '%s'.", result
),
5770 "UNIT_RESULT=%s", result
);
5773 void unit_log_process_exit(
5776 const char *command
,
5786 /* If this is a successful exit, let's log about the exit code on DEBUG level. If this is a failure
5787 * and the process exited on its own via exit(), then let's make this a NOTICE, under the assumption
5788 * that the service already logged the reason at a higher log level on its own. Otherwise, make it a
5792 else if (code
== CLD_EXITED
)
5795 level
= LOG_WARNING
;
5798 "MESSAGE_ID=" SD_MESSAGE_UNIT_PROCESS_EXIT_STR
,
5799 LOG_UNIT_MESSAGE(u
, "%s exited, code=%s, status=%i/%s",
5801 sigchld_code_to_string(code
), status
,
5802 strna(code
== CLD_EXITED
5803 ? exit_status_to_string(status
, EXIT_STATUS_FULL
)
5804 : signal_to_string(status
))),
5805 "EXIT_CODE=%s", sigchld_code_to_string(code
),
5806 "EXIT_STATUS=%i", status
,
5807 "COMMAND=%s", strna(command
),
5809 LOG_UNIT_INVOCATION_ID(u
));
5812 int unit_exit_status(Unit
*u
) {
5815 /* Returns the exit status to propagate for the most recent cycle of this unit. Returns a value in the range
5816 * 0…255 if there's something to propagate. EOPNOTSUPP if the concept does not apply to this unit type, ENODATA
5817 * if no data is currently known (for example because the unit hasn't deactivated yet) and EBADE if the main
5818 * service process has exited abnormally (signal/coredump). */
5820 if (!UNIT_VTABLE(u
)->exit_status
)
5823 return UNIT_VTABLE(u
)->exit_status(u
);
5826 int unit_failure_action_exit_status(Unit
*u
) {
5831 /* Returns the exit status to propagate on failure, or an error if there's nothing to propagate */
5833 if (u
->failure_action_exit_status
>= 0)
5834 return u
->failure_action_exit_status
;
5836 r
= unit_exit_status(u
);
5837 if (r
== -EBADE
) /* Exited, but not cleanly (i.e. by signal or such) */
5843 int unit_success_action_exit_status(Unit
*u
) {
5848 /* Returns the exit status to propagate on success, or an error if there's nothing to propagate */
5850 if (u
->success_action_exit_status
>= 0)
5851 return u
->success_action_exit_status
;
5853 r
= unit_exit_status(u
);
5854 if (r
== -EBADE
) /* Exited, but not cleanly (i.e. by signal or such) */
5860 int unit_test_trigger_loaded(Unit
*u
) {
5863 /* Tests whether the unit to trigger is loaded */
5865 trigger
= UNIT_TRIGGER(u
);
5867 return log_unit_error_errno(u
, SYNTHETIC_ERRNO(ENOENT
),
5868 "Refusing to start, no unit to trigger.");
5869 if (trigger
->load_state
!= UNIT_LOADED
)
5870 return log_unit_error_errno(u
, SYNTHETIC_ERRNO(ENOENT
),
5871 "Refusing to start, unit %s to trigger not loaded.", trigger
->id
);
5876 void unit_destroy_runtime_directory(Unit
*u
, const ExecContext
*context
) {
5877 if (context
->runtime_directory_preserve_mode
== EXEC_PRESERVE_NO
||
5878 (context
->runtime_directory_preserve_mode
== EXEC_PRESERVE_RESTART
&& !unit_will_restart(u
)))
5879 exec_context_destroy_runtime_directory(context
, u
->manager
->prefix
[EXEC_DIRECTORY_RUNTIME
]);
5882 int unit_clean(Unit
*u
, ExecCleanMask mask
) {
5883 UnitActiveState state
;
5887 /* Special return values:
5889 * -EOPNOTSUPP → cleaning not supported for this unit type
5890 * -EUNATCH → cleaning not defined for this resource type
5891 * -EBUSY → unit currently can't be cleaned since it's running or not properly loaded, or has
5892 * a job queued or similar
5895 if (!UNIT_VTABLE(u
)->clean
)
5901 if (u
->load_state
!= UNIT_LOADED
)
5907 state
= unit_active_state(u
);
5908 if (!IN_SET(state
, UNIT_INACTIVE
))
5911 return UNIT_VTABLE(u
)->clean(u
, mask
);
5914 int unit_can_clean(Unit
*u
, ExecCleanMask
*ret
) {
5917 if (!UNIT_VTABLE(u
)->clean
||
5918 u
->load_state
!= UNIT_LOADED
) {
5923 /* When the clean() method is set, can_clean() really should be set too */
5924 assert(UNIT_VTABLE(u
)->can_clean
);
5926 return UNIT_VTABLE(u
)->can_clean(u
, ret
);
5929 static const char* const collect_mode_table
[_COLLECT_MODE_MAX
] = {
5930 [COLLECT_INACTIVE
] = "inactive",
5931 [COLLECT_INACTIVE_OR_FAILED
] = "inactive-or-failed",
5934 DEFINE_STRING_TABLE_LOOKUP(collect_mode
, CollectMode
);