1 /* SPDX-License-Identifier: LGPL-2.1+ */
9 #include "sd-messages.h"
11 #include "all-units.h"
12 #include "alloc-util.h"
13 #include "bpf-firewall.h"
14 #include "bus-common-errors.h"
16 #include "cgroup-setup.h"
17 #include "cgroup-util.h"
18 #include "dbus-unit.h"
24 #include "fileio-label.h"
26 #include "format-util.h"
28 #include "id128-util.h"
31 #include "load-dropin.h"
32 #include "load-fragment.h"
35 #include "missing_audit.h"
37 #include "parse-util.h"
38 #include "path-util.h"
39 #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 u
->start_ratelimit
= (RateLimit
) { m
->default_start_limit_interval
, m
->default_start_limit_burst
};
126 u
->auto_stop_ratelimit
= (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
) &&
1066 /* If syslog or kernel logging is requested (or log namespacing is), make sure our own logging daemon
1069 if (c
->log_namespace
) {
1070 _cleanup_free_
char *socket_unit
= NULL
, *varlink_socket_unit
= NULL
;
1072 r
= unit_name_build_from_type("systemd-journald", c
->log_namespace
, UNIT_SOCKET
, &socket_unit
);
1076 r
= unit_add_two_dependencies_by_name(u
, UNIT_AFTER
, UNIT_REQUIRES
, socket_unit
, true, UNIT_DEPENDENCY_FILE
);
1080 r
= unit_name_build_from_type("systemd-journald-varlink", c
->log_namespace
, UNIT_SOCKET
, &varlink_socket_unit
);
1084 r
= unit_add_two_dependencies_by_name(u
, UNIT_AFTER
, UNIT_REQUIRES
, varlink_socket_unit
, true, UNIT_DEPENDENCY_FILE
);
1088 r
= unit_add_dependency_by_name(u
, UNIT_AFTER
, SPECIAL_JOURNALD_SOCKET
, true, UNIT_DEPENDENCY_FILE
);
1095 const char *unit_description(Unit
*u
) {
1099 return u
->description
;
1101 return strna(u
->id
);
1104 const char *unit_status_string(Unit
*u
) {
1107 if (u
->manager
->status_unit_format
== STATUS_UNIT_FORMAT_NAME
&& u
->id
)
1110 return unit_description(u
);
1113 static void print_unit_dependency_mask(FILE *f
, const char *kind
, UnitDependencyMask mask
, bool *space
) {
1115 UnitDependencyMask mask
;
1118 { UNIT_DEPENDENCY_FILE
, "file" },
1119 { UNIT_DEPENDENCY_IMPLICIT
, "implicit" },
1120 { UNIT_DEPENDENCY_DEFAULT
, "default" },
1121 { UNIT_DEPENDENCY_UDEV
, "udev" },
1122 { UNIT_DEPENDENCY_PATH
, "path" },
1123 { UNIT_DEPENDENCY_MOUNTINFO_IMPLICIT
, "mountinfo-implicit" },
1124 { UNIT_DEPENDENCY_MOUNTINFO_DEFAULT
, "mountinfo-default" },
1125 { UNIT_DEPENDENCY_PROC_SWAP
, "proc-swap" },
1133 for (i
= 0; i
< ELEMENTSOF(table
); i
++) {
1138 if (FLAGS_SET(mask
, table
[i
].mask
)) {
1146 fputs(table
[i
].name
, f
);
1148 mask
&= ~table
[i
].mask
;
1155 void unit_dump(Unit
*u
, FILE *f
, const char *prefix
) {
1159 const char *prefix2
;
1160 char timestamp
[5][FORMAT_TIMESTAMP_MAX
], timespan
[FORMAT_TIMESPAN_MAX
];
1162 _cleanup_set_free_ Set
*following_set
= NULL
;
1168 assert(u
->type
>= 0);
1170 prefix
= strempty(prefix
);
1171 prefix2
= strjoina(prefix
, "\t");
1177 SET_FOREACH(t
, u
->names
, i
)
1178 if (!streq(t
, u
->id
))
1179 fprintf(f
, "%s\tAlias: %s\n", prefix
, t
);
1182 "%s\tDescription: %s\n"
1183 "%s\tInstance: %s\n"
1184 "%s\tUnit Load State: %s\n"
1185 "%s\tUnit Active State: %s\n"
1186 "%s\tState Change Timestamp: %s\n"
1187 "%s\tInactive Exit Timestamp: %s\n"
1188 "%s\tActive Enter Timestamp: %s\n"
1189 "%s\tActive Exit Timestamp: %s\n"
1190 "%s\tInactive Enter Timestamp: %s\n"
1192 "%s\tNeed Daemon Reload: %s\n"
1193 "%s\tTransient: %s\n"
1194 "%s\tPerpetual: %s\n"
1195 "%s\tGarbage Collection Mode: %s\n"
1198 "%s\tCGroup realized: %s\n",
1199 prefix
, unit_description(u
),
1200 prefix
, strna(u
->instance
),
1201 prefix
, unit_load_state_to_string(u
->load_state
),
1202 prefix
, unit_active_state_to_string(unit_active_state(u
)),
1203 prefix
, strna(format_timestamp(timestamp
[0], sizeof(timestamp
[0]), u
->state_change_timestamp
.realtime
)),
1204 prefix
, strna(format_timestamp(timestamp
[1], sizeof(timestamp
[1]), u
->inactive_exit_timestamp
.realtime
)),
1205 prefix
, strna(format_timestamp(timestamp
[2], sizeof(timestamp
[2]), u
->active_enter_timestamp
.realtime
)),
1206 prefix
, strna(format_timestamp(timestamp
[3], sizeof(timestamp
[3]), u
->active_exit_timestamp
.realtime
)),
1207 prefix
, strna(format_timestamp(timestamp
[4], sizeof(timestamp
[4]), u
->inactive_enter_timestamp
.realtime
)),
1208 prefix
, yes_no(unit_may_gc(u
)),
1209 prefix
, yes_no(unit_need_daemon_reload(u
)),
1210 prefix
, yes_no(u
->transient
),
1211 prefix
, yes_no(u
->perpetual
),
1212 prefix
, collect_mode_to_string(u
->collect_mode
),
1213 prefix
, strna(unit_slice_name(u
)),
1214 prefix
, strna(u
->cgroup_path
),
1215 prefix
, yes_no(u
->cgroup_realized
));
1217 if (u
->cgroup_realized_mask
!= 0) {
1218 _cleanup_free_
char *s
= NULL
;
1219 (void) cg_mask_to_string(u
->cgroup_realized_mask
, &s
);
1220 fprintf(f
, "%s\tCGroup realized mask: %s\n", prefix
, strnull(s
));
1223 if (u
->cgroup_enabled_mask
!= 0) {
1224 _cleanup_free_
char *s
= NULL
;
1225 (void) cg_mask_to_string(u
->cgroup_enabled_mask
, &s
);
1226 fprintf(f
, "%s\tCGroup enabled mask: %s\n", prefix
, strnull(s
));
1229 m
= unit_get_own_mask(u
);
1231 _cleanup_free_
char *s
= NULL
;
1232 (void) cg_mask_to_string(m
, &s
);
1233 fprintf(f
, "%s\tCGroup own mask: %s\n", prefix
, strnull(s
));
1236 m
= unit_get_members_mask(u
);
1238 _cleanup_free_
char *s
= NULL
;
1239 (void) cg_mask_to_string(m
, &s
);
1240 fprintf(f
, "%s\tCGroup members mask: %s\n", prefix
, strnull(s
));
1243 m
= unit_get_delegate_mask(u
);
1245 _cleanup_free_
char *s
= NULL
;
1246 (void) cg_mask_to_string(m
, &s
);
1247 fprintf(f
, "%s\tCGroup delegate mask: %s\n", prefix
, strnull(s
));
1250 if (!sd_id128_is_null(u
->invocation_id
))
1251 fprintf(f
, "%s\tInvocation ID: " SD_ID128_FORMAT_STR
"\n",
1252 prefix
, SD_ID128_FORMAT_VAL(u
->invocation_id
));
1254 STRV_FOREACH(j
, u
->documentation
)
1255 fprintf(f
, "%s\tDocumentation: %s\n", prefix
, *j
);
1257 following
= unit_following(u
);
1259 fprintf(f
, "%s\tFollowing: %s\n", prefix
, following
->id
);
1261 r
= unit_following_set(u
, &following_set
);
1265 SET_FOREACH(other
, following_set
, i
)
1266 fprintf(f
, "%s\tFollowing Set Member: %s\n", prefix
, other
->id
);
1269 if (u
->fragment_path
)
1270 fprintf(f
, "%s\tFragment Path: %s\n", prefix
, u
->fragment_path
);
1273 fprintf(f
, "%s\tSource Path: %s\n", prefix
, u
->source_path
);
1275 STRV_FOREACH(j
, u
->dropin_paths
)
1276 fprintf(f
, "%s\tDropIn Path: %s\n", prefix
, *j
);
1278 if (u
->failure_action
!= EMERGENCY_ACTION_NONE
)
1279 fprintf(f
, "%s\tFailure Action: %s\n", prefix
, emergency_action_to_string(u
->failure_action
));
1280 if (u
->failure_action_exit_status
>= 0)
1281 fprintf(f
, "%s\tFailure Action Exit Status: %i\n", prefix
, u
->failure_action_exit_status
);
1282 if (u
->success_action
!= EMERGENCY_ACTION_NONE
)
1283 fprintf(f
, "%s\tSuccess Action: %s\n", prefix
, emergency_action_to_string(u
->success_action
));
1284 if (u
->success_action_exit_status
>= 0)
1285 fprintf(f
, "%s\tSuccess Action Exit Status: %i\n", prefix
, u
->success_action_exit_status
);
1287 if (u
->job_timeout
!= USEC_INFINITY
)
1288 fprintf(f
, "%s\tJob Timeout: %s\n", prefix
, format_timespan(timespan
, sizeof(timespan
), u
->job_timeout
, 0));
1290 if (u
->job_timeout_action
!= EMERGENCY_ACTION_NONE
)
1291 fprintf(f
, "%s\tJob Timeout Action: %s\n", prefix
, emergency_action_to_string(u
->job_timeout_action
));
1293 if (u
->job_timeout_reboot_arg
)
1294 fprintf(f
, "%s\tJob Timeout Reboot Argument: %s\n", prefix
, u
->job_timeout_reboot_arg
);
1296 condition_dump_list(u
->conditions
, f
, prefix
, condition_type_to_string
);
1297 condition_dump_list(u
->asserts
, f
, prefix
, assert_type_to_string
);
1299 if (dual_timestamp_is_set(&u
->condition_timestamp
))
1301 "%s\tCondition Timestamp: %s\n"
1302 "%s\tCondition Result: %s\n",
1303 prefix
, strna(format_timestamp(timestamp
[0], sizeof(timestamp
[0]), u
->condition_timestamp
.realtime
)),
1304 prefix
, yes_no(u
->condition_result
));
1306 if (dual_timestamp_is_set(&u
->assert_timestamp
))
1308 "%s\tAssert Timestamp: %s\n"
1309 "%s\tAssert Result: %s\n",
1310 prefix
, strna(format_timestamp(timestamp
[0], sizeof(timestamp
[0]), u
->assert_timestamp
.realtime
)),
1311 prefix
, yes_no(u
->assert_result
));
1313 for (d
= 0; d
< _UNIT_DEPENDENCY_MAX
; d
++) {
1314 UnitDependencyInfo di
;
1317 HASHMAP_FOREACH_KEY(di
.data
, other
, u
->dependencies
[d
], i
) {
1320 fprintf(f
, "%s\t%s: %s (", prefix
, unit_dependency_to_string(d
), other
->id
);
1322 print_unit_dependency_mask(f
, "origin", di
.origin_mask
, &space
);
1323 print_unit_dependency_mask(f
, "destination", di
.destination_mask
, &space
);
1329 if (!hashmap_isempty(u
->requires_mounts_for
)) {
1330 UnitDependencyInfo di
;
1333 HASHMAP_FOREACH_KEY(di
.data
, path
, u
->requires_mounts_for
, i
) {
1336 fprintf(f
, "%s\tRequiresMountsFor: %s (", prefix
, path
);
1338 print_unit_dependency_mask(f
, "origin", di
.origin_mask
, &space
);
1339 print_unit_dependency_mask(f
, "destination", di
.destination_mask
, &space
);
1345 if (u
->load_state
== UNIT_LOADED
) {
1348 "%s\tStopWhenUnneeded: %s\n"
1349 "%s\tRefuseManualStart: %s\n"
1350 "%s\tRefuseManualStop: %s\n"
1351 "%s\tDefaultDependencies: %s\n"
1352 "%s\tOnFailureJobMode: %s\n"
1353 "%s\tIgnoreOnIsolate: %s\n",
1354 prefix
, yes_no(u
->stop_when_unneeded
),
1355 prefix
, yes_no(u
->refuse_manual_start
),
1356 prefix
, yes_no(u
->refuse_manual_stop
),
1357 prefix
, yes_no(u
->default_dependencies
),
1358 prefix
, job_mode_to_string(u
->on_failure_job_mode
),
1359 prefix
, yes_no(u
->ignore_on_isolate
));
1361 if (UNIT_VTABLE(u
)->dump
)
1362 UNIT_VTABLE(u
)->dump(u
, f
, prefix2
);
1364 } else if (u
->load_state
== UNIT_MERGED
)
1366 "%s\tMerged into: %s\n",
1367 prefix
, u
->merged_into
->id
);
1368 else if (u
->load_state
== UNIT_ERROR
)
1369 fprintf(f
, "%s\tLoad Error Code: %s\n", prefix
, strerror_safe(u
->load_error
));
1371 for (n
= sd_bus_track_first(u
->bus_track
); n
; n
= sd_bus_track_next(u
->bus_track
))
1372 fprintf(f
, "%s\tBus Ref: %s\n", prefix
, n
);
1375 job_dump(u
->job
, f
, prefix2
);
1378 job_dump(u
->nop_job
, f
, prefix2
);
1381 /* Common implementation for multiple backends */
1382 int unit_load_fragment_and_dropin(Unit
*u
, bool fragment_required
) {
1387 /* Load a .{service,socket,...} file */
1388 r
= unit_load_fragment(u
);
1392 if (u
->load_state
== UNIT_STUB
) {
1393 if (fragment_required
)
1396 u
->load_state
= UNIT_LOADED
;
1399 /* Load drop-in directory data. If u is an alias, we might be reloading the
1400 * target unit needlessly. But we cannot be sure which drops-ins have already
1401 * been loaded and which not, at least without doing complicated book-keeping,
1402 * so let's always reread all drop-ins. */
1403 return unit_load_dropin(unit_follow_merge(u
));
1406 void unit_add_to_target_deps_queue(Unit
*u
) {
1407 Manager
*m
= u
->manager
;
1411 if (u
->in_target_deps_queue
)
1414 LIST_PREPEND(target_deps_queue
, m
->target_deps_queue
, u
);
1415 u
->in_target_deps_queue
= true;
1418 int unit_add_default_target_dependency(Unit
*u
, Unit
*target
) {
1422 if (target
->type
!= UNIT_TARGET
)
1425 /* Only add the dependency if both units are loaded, so that
1426 * that loop check below is reliable */
1427 if (u
->load_state
!= UNIT_LOADED
||
1428 target
->load_state
!= UNIT_LOADED
)
1431 /* If either side wants no automatic dependencies, then let's
1433 if (!u
->default_dependencies
||
1434 !target
->default_dependencies
)
1437 /* Don't create loops */
1438 if (hashmap_get(target
->dependencies
[UNIT_BEFORE
], u
))
1441 return unit_add_dependency(target
, UNIT_AFTER
, u
, true, UNIT_DEPENDENCY_DEFAULT
);
1444 static int unit_add_slice_dependencies(Unit
*u
) {
1445 UnitDependencyMask mask
;
1448 if (!UNIT_HAS_CGROUP_CONTEXT(u
))
1451 /* Slice units are implicitly ordered against their parent slices (as this relationship is encoded in the
1452 name), while all other units are ordered based on configuration (as in their case Slice= configures the
1454 mask
= u
->type
== UNIT_SLICE
? UNIT_DEPENDENCY_IMPLICIT
: UNIT_DEPENDENCY_FILE
;
1456 if (UNIT_ISSET(u
->slice
))
1457 return unit_add_two_dependencies(u
, UNIT_AFTER
, UNIT_REQUIRES
, UNIT_DEREF(u
->slice
), true, mask
);
1459 if (unit_has_name(u
, SPECIAL_ROOT_SLICE
))
1462 return unit_add_two_dependencies_by_name(u
, UNIT_AFTER
, UNIT_REQUIRES
, SPECIAL_ROOT_SLICE
, true, mask
);
1465 static int unit_add_mount_dependencies(Unit
*u
) {
1466 UnitDependencyInfo di
;
1473 HASHMAP_FOREACH_KEY(di
.data
, path
, u
->requires_mounts_for
, i
) {
1474 char prefix
[strlen(path
) + 1];
1476 PATH_FOREACH_PREFIX_MORE(prefix
, path
) {
1477 _cleanup_free_
char *p
= NULL
;
1480 r
= unit_name_from_path(prefix
, ".mount", &p
);
1484 m
= manager_get_unit(u
->manager
, p
);
1486 /* Make sure to load the mount unit if
1487 * it exists. If so the dependencies
1488 * on this unit will be added later
1489 * during the loading of the mount
1491 (void) manager_load_unit_prepare(u
->manager
, p
, NULL
, NULL
, &m
);
1497 if (m
->load_state
!= UNIT_LOADED
)
1500 r
= unit_add_dependency(u
, UNIT_AFTER
, m
, true, di
.origin_mask
);
1504 if (m
->fragment_path
) {
1505 r
= unit_add_dependency(u
, UNIT_REQUIRES
, m
, true, di
.origin_mask
);
1515 static int unit_add_startup_units(Unit
*u
) {
1519 c
= unit_get_cgroup_context(u
);
1523 if (c
->startup_cpu_shares
== CGROUP_CPU_SHARES_INVALID
&&
1524 c
->startup_io_weight
== CGROUP_WEIGHT_INVALID
&&
1525 c
->startup_blockio_weight
== CGROUP_BLKIO_WEIGHT_INVALID
)
1528 r
= set_ensure_allocated(&u
->manager
->startup_units
, NULL
);
1532 return set_put(u
->manager
->startup_units
, u
);
1535 int unit_load(Unit
*u
) {
1540 if (u
->in_load_queue
) {
1541 LIST_REMOVE(load_queue
, u
->manager
->load_queue
, u
);
1542 u
->in_load_queue
= false;
1545 if (u
->type
== _UNIT_TYPE_INVALID
)
1548 if (u
->load_state
!= UNIT_STUB
)
1551 if (u
->transient_file
) {
1552 /* Finalize transient file: if this is a transient unit file, as soon as we reach unit_load() the setup
1553 * is complete, hence let's synchronize the unit file we just wrote to disk. */
1555 r
= fflush_and_check(u
->transient_file
);
1559 u
->transient_file
= safe_fclose(u
->transient_file
);
1560 u
->fragment_mtime
= now(CLOCK_REALTIME
);
1563 r
= UNIT_VTABLE(u
)->load(u
);
1567 assert(u
->load_state
!= UNIT_STUB
);
1569 if (u
->load_state
== UNIT_LOADED
) {
1570 unit_add_to_target_deps_queue(u
);
1572 r
= unit_add_slice_dependencies(u
);
1576 r
= unit_add_mount_dependencies(u
);
1580 r
= unit_add_startup_units(u
);
1584 if (u
->on_failure_job_mode
== JOB_ISOLATE
&& hashmap_size(u
->dependencies
[UNIT_ON_FAILURE
]) > 1) {
1585 log_unit_error(u
, "More than one OnFailure= dependencies specified but OnFailureJobMode=isolate set. Refusing.");
1590 if (u
->job_running_timeout
!= USEC_INFINITY
&& u
->job_running_timeout
> u
->job_timeout
)
1591 log_unit_warning(u
, "JobRunningTimeoutSec= is greater than JobTimeoutSec=, it has no effect.");
1593 /* We finished loading, let's ensure our parents recalculate the members mask */
1594 unit_invalidate_cgroup_members_masks(u
);
1597 assert((u
->load_state
!= UNIT_MERGED
) == !u
->merged_into
);
1599 unit_add_to_dbus_queue(unit_follow_merge(u
));
1600 unit_add_to_gc_queue(u
);
1605 /* We convert ENOEXEC errors to the UNIT_BAD_SETTING load state here. Configuration parsing code should hence
1606 * return ENOEXEC to ensure units are placed in this state after loading */
1608 u
->load_state
= u
->load_state
== UNIT_STUB
? UNIT_NOT_FOUND
:
1609 r
== -ENOEXEC
? UNIT_BAD_SETTING
:
1613 unit_add_to_dbus_queue(u
);
1614 unit_add_to_gc_queue(u
);
1616 return log_unit_debug_errno(u
, r
, "Failed to load configuration: %m");
1620 static int log_unit_internal(void *userdata
, int level
, int error
, const char *file
, int line
, const char *func
, const char *format
, ...) {
1625 va_start(ap
, format
);
1627 r
= log_object_internalv(level
, error
, file
, line
, func
,
1628 u
->manager
->unit_log_field
,
1630 u
->manager
->invocation_log_field
,
1631 u
->invocation_id_string
,
1634 r
= log_internalv(level
, error
, file
, line
, func
, format
, ap
);
1640 static bool unit_test_condition(Unit
*u
) {
1643 dual_timestamp_get(&u
->condition_timestamp
);
1644 u
->condition_result
= condition_test_list(u
->conditions
, condition_type_to_string
, log_unit_internal
, u
);
1646 unit_add_to_dbus_queue(u
);
1648 return u
->condition_result
;
1651 static bool unit_test_assert(Unit
*u
) {
1654 dual_timestamp_get(&u
->assert_timestamp
);
1655 u
->assert_result
= condition_test_list(u
->asserts
, assert_type_to_string
, log_unit_internal
, u
);
1657 unit_add_to_dbus_queue(u
);
1659 return u
->assert_result
;
1662 void unit_status_printf(Unit
*u
, const char *status
, const char *unit_status_msg_format
) {
1665 d
= unit_status_string(u
);
1666 if (log_get_show_color())
1667 d
= strjoina(ANSI_HIGHLIGHT
, d
, ANSI_NORMAL
);
1669 DISABLE_WARNING_FORMAT_NONLITERAL
;
1670 manager_status_printf(u
->manager
, STATUS_TYPE_NORMAL
, status
, unit_status_msg_format
, d
);
1674 int unit_test_start_limit(Unit
*u
) {
1679 if (ratelimit_below(&u
->start_ratelimit
)) {
1680 u
->start_limit_hit
= false;
1684 log_unit_warning(u
, "Start request repeated too quickly.");
1685 u
->start_limit_hit
= true;
1687 reason
= strjoina("unit ", u
->id
, " failed");
1689 emergency_action(u
->manager
, u
->start_limit_action
,
1690 EMERGENCY_ACTION_IS_WATCHDOG
|EMERGENCY_ACTION_WARN
,
1691 u
->reboot_arg
, -1, reason
);
1696 bool unit_shall_confirm_spawn(Unit
*u
) {
1699 if (manager_is_confirm_spawn_disabled(u
->manager
))
1702 /* For some reasons units remaining in the same process group
1703 * as PID 1 fail to acquire the console even if it's not used
1704 * by any process. So skip the confirmation question for them. */
1705 return !unit_get_exec_context(u
)->same_pgrp
;
1708 static bool unit_verify_deps(Unit
*u
) {
1715 /* Checks whether all BindsTo= dependencies of this unit are fulfilled — if they are also combined with
1716 * After=. We do not check Requires= or Requisite= here as they only should have an effect on the job
1717 * processing, but do not have any effect afterwards. We don't check BindsTo= dependencies that are not used in
1718 * conjunction with After= as for them any such check would make things entirely racy. */
1720 HASHMAP_FOREACH_KEY(v
, other
, u
->dependencies
[UNIT_BINDS_TO
], j
) {
1722 if (!hashmap_contains(u
->dependencies
[UNIT_AFTER
], other
))
1725 if (!UNIT_IS_ACTIVE_OR_RELOADING(unit_active_state(other
))) {
1726 log_unit_notice(u
, "Bound to unit %s, but unit isn't active.", other
->id
);
1734 /* Errors that aren't really errors:
1735 * -EALREADY: Unit is already started.
1736 * -ECOMM: Condition failed
1737 * -EAGAIN: An operation is already in progress. Retry later.
1739 * Errors that are real errors:
1740 * -EBADR: This unit type does not support starting.
1741 * -ECANCELED: Start limit hit, too many requests for now
1742 * -EPROTO: Assert failed
1743 * -EINVAL: Unit not loaded
1744 * -EOPNOTSUPP: Unit type not supported
1745 * -ENOLINK: The necessary dependencies are not fulfilled.
1746 * -ESTALE: This unit has been started before and can't be started a second time
1747 * -ENOENT: This is a triggering unit and unit to trigger is not loaded
1749 int unit_start(Unit
*u
) {
1750 UnitActiveState state
;
1755 /* If this is already started, then this will succeed. Note that this will even succeed if this unit
1756 * is not startable by the user. This is relied on to detect when we need to wait for units and when
1757 * waiting is finished. */
1758 state
= unit_active_state(u
);
1759 if (UNIT_IS_ACTIVE_OR_RELOADING(state
))
1761 if (state
== UNIT_MAINTENANCE
)
1764 /* Units that aren't loaded cannot be started */
1765 if (u
->load_state
!= UNIT_LOADED
)
1768 /* Refuse starting scope units more than once */
1769 if (UNIT_VTABLE(u
)->once_only
&& dual_timestamp_is_set(&u
->inactive_enter_timestamp
))
1772 /* If the conditions failed, don't do anything at all. If we already are activating this call might
1773 * still be useful to speed up activation in case there is some hold-off time, but we don't want to
1774 * recheck the condition in that case. */
1775 if (state
!= UNIT_ACTIVATING
&&
1776 !unit_test_condition(u
))
1777 return log_unit_debug_errno(u
, SYNTHETIC_ERRNO(ECOMM
), "Starting requested but condition failed. Not starting unit.");
1779 /* If the asserts failed, fail the entire job */
1780 if (state
!= UNIT_ACTIVATING
&&
1781 !unit_test_assert(u
))
1782 return log_unit_notice_errno(u
, SYNTHETIC_ERRNO(EPROTO
), "Starting requested but asserts failed.");
1784 /* Units of types that aren't supported cannot be started. Note that we do this test only after the
1785 * condition checks, so that we rather return condition check errors (which are usually not
1786 * considered a true failure) than "not supported" errors (which are considered a failure).
1788 if (!unit_type_supported(u
->type
))
1791 /* Let's make sure that the deps really are in order before we start this. Normally the job engine
1792 * should have taken care of this already, but let's check this here again. After all, our
1793 * dependencies might not be in effect anymore, due to a reload or due to a failed condition. */
1794 if (!unit_verify_deps(u
))
1797 /* Forward to the main object, if we aren't it. */
1798 following
= unit_following(u
);
1800 log_unit_debug(u
, "Redirecting start request from %s to %s.", u
->id
, following
->id
);
1801 return unit_start(following
);
1804 /* If it is stopped, but we cannot start it, then fail */
1805 if (!UNIT_VTABLE(u
)->start
)
1808 /* We don't suppress calls to ->start() here when we are already starting, to allow this request to
1809 * be used as a "hurry up" call, for example when the unit is in some "auto restart" state where it
1810 * waits for a holdoff timer to elapse before it will start again. */
1812 unit_add_to_dbus_queue(u
);
1814 return UNIT_VTABLE(u
)->start(u
);
1817 bool unit_can_start(Unit
*u
) {
1820 if (u
->load_state
!= UNIT_LOADED
)
1823 if (!unit_type_supported(u
->type
))
1826 /* Scope units may be started only once */
1827 if (UNIT_VTABLE(u
)->once_only
&& dual_timestamp_is_set(&u
->inactive_exit_timestamp
))
1830 return !!UNIT_VTABLE(u
)->start
;
1833 bool unit_can_isolate(Unit
*u
) {
1836 return unit_can_start(u
) &&
1841 * -EBADR: This unit type does not support stopping.
1842 * -EALREADY: Unit is already stopped.
1843 * -EAGAIN: An operation is already in progress. Retry later.
1845 int unit_stop(Unit
*u
) {
1846 UnitActiveState state
;
1851 state
= unit_active_state(u
);
1852 if (UNIT_IS_INACTIVE_OR_FAILED(state
))
1855 following
= unit_following(u
);
1857 log_unit_debug(u
, "Redirecting stop request from %s to %s.", u
->id
, following
->id
);
1858 return unit_stop(following
);
1861 if (!UNIT_VTABLE(u
)->stop
)
1864 unit_add_to_dbus_queue(u
);
1866 return UNIT_VTABLE(u
)->stop(u
);
1869 bool unit_can_stop(Unit
*u
) {
1872 if (!unit_type_supported(u
->type
))
1878 return !!UNIT_VTABLE(u
)->stop
;
1882 * -EBADR: This unit type does not support reloading.
1883 * -ENOEXEC: Unit is not started.
1884 * -EAGAIN: An operation is already in progress. Retry later.
1886 int unit_reload(Unit
*u
) {
1887 UnitActiveState state
;
1892 if (u
->load_state
!= UNIT_LOADED
)
1895 if (!unit_can_reload(u
))
1898 state
= unit_active_state(u
);
1899 if (state
== UNIT_RELOADING
)
1902 if (state
!= UNIT_ACTIVE
) {
1903 log_unit_warning(u
, "Unit cannot be reloaded because it is inactive.");
1907 following
= unit_following(u
);
1909 log_unit_debug(u
, "Redirecting reload request from %s to %s.", u
->id
, following
->id
);
1910 return unit_reload(following
);
1913 unit_add_to_dbus_queue(u
);
1915 if (!UNIT_VTABLE(u
)->reload
) {
1916 /* Unit doesn't have a reload function, but we need to propagate the reload anyway */
1917 unit_notify(u
, unit_active_state(u
), unit_active_state(u
), 0);
1921 return UNIT_VTABLE(u
)->reload(u
);
1924 bool unit_can_reload(Unit
*u
) {
1927 if (UNIT_VTABLE(u
)->can_reload
)
1928 return UNIT_VTABLE(u
)->can_reload(u
);
1930 if (!hashmap_isempty(u
->dependencies
[UNIT_PROPAGATES_RELOAD_TO
]))
1933 return UNIT_VTABLE(u
)->reload
;
1936 bool unit_is_unneeded(Unit
*u
) {
1937 static const UnitDependency deps
[] = {
1947 if (!u
->stop_when_unneeded
)
1950 /* Don't clean up while the unit is transitioning or is even inactive. */
1951 if (!UNIT_IS_ACTIVE_OR_RELOADING(unit_active_state(u
)))
1956 for (j
= 0; j
< ELEMENTSOF(deps
); j
++) {
1961 /* If a dependent unit has a job queued, is active or transitioning, or is marked for
1962 * restart, then don't clean this one up. */
1964 HASHMAP_FOREACH_KEY(v
, other
, u
->dependencies
[deps
[j
]], i
) {
1968 if (!UNIT_IS_INACTIVE_OR_FAILED(unit_active_state(other
)))
1971 if (unit_will_restart(other
))
1979 static void check_unneeded_dependencies(Unit
*u
) {
1981 static const UnitDependency deps
[] = {
1991 /* Add all units this unit depends on to the queue that processes StopWhenUnneeded= behaviour. */
1993 for (j
= 0; j
< ELEMENTSOF(deps
); j
++) {
1998 HASHMAP_FOREACH_KEY(v
, other
, u
->dependencies
[deps
[j
]], i
)
1999 unit_submit_to_stop_when_unneeded_queue(other
);
2003 static void unit_check_binds_to(Unit
*u
) {
2004 _cleanup_(sd_bus_error_free
) sd_bus_error error
= SD_BUS_ERROR_NULL
;
2016 if (unit_active_state(u
) != UNIT_ACTIVE
)
2019 HASHMAP_FOREACH_KEY(v
, other
, u
->dependencies
[UNIT_BINDS_TO
], i
) {
2023 if (!other
->coldplugged
)
2024 /* We might yet create a job for the other unit… */
2027 if (!UNIT_IS_INACTIVE_OR_FAILED(unit_active_state(other
)))
2037 /* If stopping a unit fails continuously we might enter a stop
2038 * loop here, hence stop acting on the service being
2039 * unnecessary after a while. */
2040 if (!ratelimit_below(&u
->auto_stop_ratelimit
)) {
2041 log_unit_warning(u
, "Unit is bound to inactive unit %s, but not stopping since we tried this too often recently.", other
->id
);
2046 log_unit_info(u
, "Unit is bound to inactive unit %s. Stopping, too.", other
->id
);
2048 /* A unit we need to run is gone. Sniff. Let's stop this. */
2049 r
= manager_add_job(u
->manager
, JOB_STOP
, u
, JOB_FAIL
, NULL
, &error
, NULL
);
2051 log_unit_warning_errno(u
, r
, "Failed to enqueue stop job, ignoring: %s", bus_error_message(&error
, r
));
2054 static void retroactively_start_dependencies(Unit
*u
) {
2060 assert(UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(u
)));
2062 HASHMAP_FOREACH_KEY(v
, other
, u
->dependencies
[UNIT_REQUIRES
], i
)
2063 if (!hashmap_get(u
->dependencies
[UNIT_AFTER
], other
) &&
2064 !UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(other
)))
2065 manager_add_job(u
->manager
, JOB_START
, other
, JOB_REPLACE
, NULL
, NULL
, NULL
);
2067 HASHMAP_FOREACH_KEY(v
, other
, u
->dependencies
[UNIT_BINDS_TO
], i
)
2068 if (!hashmap_get(u
->dependencies
[UNIT_AFTER
], other
) &&
2069 !UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(other
)))
2070 manager_add_job(u
->manager
, JOB_START
, other
, JOB_REPLACE
, NULL
, NULL
, NULL
);
2072 HASHMAP_FOREACH_KEY(v
, other
, u
->dependencies
[UNIT_WANTS
], i
)
2073 if (!hashmap_get(u
->dependencies
[UNIT_AFTER
], other
) &&
2074 !UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(other
)))
2075 manager_add_job(u
->manager
, JOB_START
, other
, JOB_FAIL
, NULL
, NULL
, NULL
);
2077 HASHMAP_FOREACH_KEY(v
, other
, u
->dependencies
[UNIT_CONFLICTS
], i
)
2078 if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other
)))
2079 manager_add_job(u
->manager
, JOB_STOP
, other
, JOB_REPLACE
, NULL
, NULL
, NULL
);
2081 HASHMAP_FOREACH_KEY(v
, other
, u
->dependencies
[UNIT_CONFLICTED_BY
], i
)
2082 if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other
)))
2083 manager_add_job(u
->manager
, JOB_STOP
, other
, JOB_REPLACE
, NULL
, NULL
, NULL
);
2086 static void retroactively_stop_dependencies(Unit
*u
) {
2092 assert(UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(u
)));
2094 /* Pull down units which are bound to us recursively if enabled */
2095 HASHMAP_FOREACH_KEY(v
, other
, u
->dependencies
[UNIT_BOUND_BY
], i
)
2096 if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other
)))
2097 manager_add_job(u
->manager
, JOB_STOP
, other
, JOB_REPLACE
, NULL
, NULL
, NULL
);
2100 void unit_start_on_failure(Unit
*u
) {
2108 if (hashmap_size(u
->dependencies
[UNIT_ON_FAILURE
]) <= 0)
2111 log_unit_info(u
, "Triggering OnFailure= dependencies.");
2113 HASHMAP_FOREACH_KEY(v
, other
, u
->dependencies
[UNIT_ON_FAILURE
], i
) {
2114 _cleanup_(sd_bus_error_free
) sd_bus_error error
= SD_BUS_ERROR_NULL
;
2116 r
= manager_add_job(u
->manager
, JOB_START
, other
, u
->on_failure_job_mode
, NULL
, &error
, NULL
);
2118 log_unit_warning_errno(u
, r
, "Failed to enqueue OnFailure= job, ignoring: %s", bus_error_message(&error
, r
));
2122 void unit_trigger_notify(Unit
*u
) {
2129 HASHMAP_FOREACH_KEY(v
, other
, u
->dependencies
[UNIT_TRIGGERED_BY
], i
)
2130 if (UNIT_VTABLE(other
)->trigger_notify
)
2131 UNIT_VTABLE(other
)->trigger_notify(other
, u
);
2134 static int raise_level(int log_level
, bool condition_info
, bool condition_notice
) {
2135 if (condition_notice
&& log_level
> LOG_NOTICE
)
2137 if (condition_info
&& log_level
> LOG_INFO
)
2142 static int unit_log_resources(Unit
*u
) {
2143 struct iovec iovec
[1 + _CGROUP_IP_ACCOUNTING_METRIC_MAX
+ _CGROUP_IO_ACCOUNTING_METRIC_MAX
+ 4];
2144 bool any_traffic
= false, have_ip_accounting
= false, any_io
= false, have_io_accounting
= false;
2145 _cleanup_free_
char *igress
= NULL
, *egress
= NULL
, *rr
= NULL
, *wr
= NULL
;
2146 int log_level
= LOG_DEBUG
; /* May be raised if resources consumed over a treshold */
2147 size_t n_message_parts
= 0, n_iovec
= 0;
2148 char* message_parts
[1 + 2 + 2 + 1], *t
;
2149 nsec_t nsec
= NSEC_INFINITY
;
2150 CGroupIPAccountingMetric m
;
2153 const char* const ip_fields
[_CGROUP_IP_ACCOUNTING_METRIC_MAX
] = {
2154 [CGROUP_IP_INGRESS_BYTES
] = "IP_METRIC_INGRESS_BYTES",
2155 [CGROUP_IP_INGRESS_PACKETS
] = "IP_METRIC_INGRESS_PACKETS",
2156 [CGROUP_IP_EGRESS_BYTES
] = "IP_METRIC_EGRESS_BYTES",
2157 [CGROUP_IP_EGRESS_PACKETS
] = "IP_METRIC_EGRESS_PACKETS",
2159 const char* const io_fields
[_CGROUP_IO_ACCOUNTING_METRIC_MAX
] = {
2160 [CGROUP_IO_READ_BYTES
] = "IO_METRIC_READ_BYTES",
2161 [CGROUP_IO_WRITE_BYTES
] = "IO_METRIC_WRITE_BYTES",
2162 [CGROUP_IO_READ_OPERATIONS
] = "IO_METRIC_READ_OPERATIONS",
2163 [CGROUP_IO_WRITE_OPERATIONS
] = "IO_METRIC_WRITE_OPERATIONS",
2168 /* Invoked whenever a unit enters failed or dead state. Logs information about consumed resources if resource
2169 * accounting was enabled for a unit. It does this in two ways: a friendly human readable string with reduced
2170 * information and the complete data in structured fields. */
2172 (void) unit_get_cpu_usage(u
, &nsec
);
2173 if (nsec
!= NSEC_INFINITY
) {
2174 char buf
[FORMAT_TIMESPAN_MAX
] = "";
2176 /* Format the CPU time for inclusion in the structured log message */
2177 if (asprintf(&t
, "CPU_USAGE_NSEC=%" PRIu64
, nsec
) < 0) {
2181 iovec
[n_iovec
++] = IOVEC_MAKE_STRING(t
);
2183 /* Format the CPU time for inclusion in the human language message string */
2184 format_timespan(buf
, sizeof(buf
), nsec
/ NSEC_PER_USEC
, USEC_PER_MSEC
);
2185 t
= strjoin("consumed ", buf
, " CPU time");
2191 message_parts
[n_message_parts
++] = t
;
2193 log_level
= raise_level(log_level
,
2194 nsec
> NOTICEWORTHY_CPU_NSEC
,
2195 nsec
> MENTIONWORTHY_CPU_NSEC
);
2198 for (CGroupIOAccountingMetric k
= 0; k
< _CGROUP_IO_ACCOUNTING_METRIC_MAX
; k
++) {
2199 char buf
[FORMAT_BYTES_MAX
] = "";
2200 uint64_t value
= UINT64_MAX
;
2202 assert(io_fields
[k
]);
2204 (void) unit_get_io_accounting(u
, k
, k
> 0, &value
);
2205 if (value
== UINT64_MAX
)
2208 have_io_accounting
= true;
2212 /* Format IO accounting data for inclusion in the structured log message */
2213 if (asprintf(&t
, "%s=%" PRIu64
, io_fields
[k
], value
) < 0) {
2217 iovec
[n_iovec
++] = IOVEC_MAKE_STRING(t
);
2219 /* Format the IO accounting data for inclusion in the human language message string, but only
2220 * for the bytes counters (and not for the operations counters) */
2221 if (k
== CGROUP_IO_READ_BYTES
) {
2223 rr
= strjoin("read ", format_bytes(buf
, sizeof(buf
), value
), " from disk");
2228 } else if (k
== CGROUP_IO_WRITE_BYTES
) {
2230 wr
= strjoin("written ", format_bytes(buf
, sizeof(buf
), value
), " to disk");
2237 if (IN_SET(k
, CGROUP_IO_READ_BYTES
, CGROUP_IO_WRITE_BYTES
))
2238 log_level
= raise_level(log_level
,
2239 value
> MENTIONWORTHY_IO_BYTES
,
2240 value
> NOTICEWORTHY_IO_BYTES
);
2243 if (have_io_accounting
) {
2246 message_parts
[n_message_parts
++] = TAKE_PTR(rr
);
2248 message_parts
[n_message_parts
++] = TAKE_PTR(wr
);
2253 k
= strdup("no IO");
2259 message_parts
[n_message_parts
++] = k
;
2263 for (m
= 0; m
< _CGROUP_IP_ACCOUNTING_METRIC_MAX
; m
++) {
2264 char buf
[FORMAT_BYTES_MAX
] = "";
2265 uint64_t value
= UINT64_MAX
;
2267 assert(ip_fields
[m
]);
2269 (void) unit_get_ip_accounting(u
, m
, &value
);
2270 if (value
== UINT64_MAX
)
2273 have_ip_accounting
= true;
2277 /* Format IP accounting data for inclusion in the structured log message */
2278 if (asprintf(&t
, "%s=%" PRIu64
, ip_fields
[m
], value
) < 0) {
2282 iovec
[n_iovec
++] = IOVEC_MAKE_STRING(t
);
2284 /* Format the IP accounting data for inclusion in the human language message string, but only for the
2285 * bytes counters (and not for the packets counters) */
2286 if (m
== CGROUP_IP_INGRESS_BYTES
) {
2288 igress
= strjoin("received ", format_bytes(buf
, sizeof(buf
), value
), " IP traffic");
2293 } else if (m
== CGROUP_IP_EGRESS_BYTES
) {
2295 egress
= strjoin("sent ", format_bytes(buf
, sizeof(buf
), value
), " IP traffic");
2302 if (IN_SET(m
, CGROUP_IP_INGRESS_BYTES
, CGROUP_IP_EGRESS_BYTES
))
2303 log_level
= raise_level(log_level
,
2304 value
> MENTIONWORTHY_IP_BYTES
,
2305 value
> NOTICEWORTHY_IP_BYTES
);
2308 if (have_ip_accounting
) {
2311 message_parts
[n_message_parts
++] = TAKE_PTR(igress
);
2313 message_parts
[n_message_parts
++] = TAKE_PTR(egress
);
2318 k
= strdup("no IP traffic");
2324 message_parts
[n_message_parts
++] = k
;
2328 /* Is there any accounting data available at all? */
2334 if (n_message_parts
== 0)
2335 t
= strjoina("MESSAGE=", u
->id
, ": Completed.");
2337 _cleanup_free_
char *joined
;
2339 message_parts
[n_message_parts
] = NULL
;
2341 joined
= strv_join(message_parts
, ", ");
2347 joined
[0] = ascii_toupper(joined
[0]);
2348 t
= strjoina("MESSAGE=", u
->id
, ": ", joined
, ".");
2351 /* The following four fields we allocate on the stack or are static strings, we hence don't want to free them,
2352 * and hence don't increase n_iovec for them */
2353 iovec
[n_iovec
] = IOVEC_MAKE_STRING(t
);
2354 iovec
[n_iovec
+ 1] = IOVEC_MAKE_STRING("MESSAGE_ID=" SD_MESSAGE_UNIT_RESOURCES_STR
);
2356 t
= strjoina(u
->manager
->unit_log_field
, u
->id
);
2357 iovec
[n_iovec
+ 2] = IOVEC_MAKE_STRING(t
);
2359 t
= strjoina(u
->manager
->invocation_log_field
, u
->invocation_id_string
);
2360 iovec
[n_iovec
+ 3] = IOVEC_MAKE_STRING(t
);
2362 log_struct_iovec(log_level
, iovec
, n_iovec
+ 4);
2366 for (i
= 0; i
< n_message_parts
; i
++)
2367 free(message_parts
[i
]);
2369 for (i
= 0; i
< n_iovec
; i
++)
2370 free(iovec
[i
].iov_base
);
2376 static void unit_update_on_console(Unit
*u
) {
2381 b
= unit_needs_console(u
);
2382 if (u
->on_console
== b
)
2387 manager_ref_console(u
->manager
);
2389 manager_unref_console(u
->manager
);
2392 static void unit_emit_audit_start(Unit
*u
) {
2395 if (u
->type
!= UNIT_SERVICE
)
2398 /* Write audit record if we have just finished starting up */
2399 manager_send_unit_audit(u
->manager
, u
, AUDIT_SERVICE_START
, true);
2403 static void unit_emit_audit_stop(Unit
*u
, UnitActiveState state
) {
2406 if (u
->type
!= UNIT_SERVICE
)
2410 /* Write audit record if we have just finished shutting down */
2411 manager_send_unit_audit(u
->manager
, u
, AUDIT_SERVICE_STOP
, state
== UNIT_INACTIVE
);
2412 u
->in_audit
= false;
2414 /* Hmm, if there was no start record written write it now, so that we always have a nice pair */
2415 manager_send_unit_audit(u
->manager
, u
, AUDIT_SERVICE_START
, state
== UNIT_INACTIVE
);
2417 if (state
== UNIT_INACTIVE
)
2418 manager_send_unit_audit(u
->manager
, u
, AUDIT_SERVICE_STOP
, true);
2422 static bool unit_process_job(Job
*j
, UnitActiveState ns
, UnitNotifyFlags flags
) {
2423 bool unexpected
= false;
2428 if (j
->state
== JOB_WAITING
)
2430 /* So we reached a different state for this job. Let's see if we can run it now if it failed previously
2432 job_add_to_run_queue(j
);
2434 /* Let's check whether the unit's new state constitutes a finished job, or maybe contradicts a running job and
2435 * hence needs to invalidate jobs. */
2440 case JOB_VERIFY_ACTIVE
:
2442 if (UNIT_IS_ACTIVE_OR_RELOADING(ns
))
2443 job_finish_and_invalidate(j
, JOB_DONE
, true, false);
2444 else if (j
->state
== JOB_RUNNING
&& ns
!= UNIT_ACTIVATING
) {
2447 if (UNIT_IS_INACTIVE_OR_FAILED(ns
)) {
2448 if (ns
== UNIT_FAILED
)
2449 result
= JOB_FAILED
;
2450 else if (FLAGS_SET(flags
, UNIT_NOTIFY_SKIP_CONDITION
))
2451 result
= JOB_SKIPPED
;
2455 job_finish_and_invalidate(j
, result
, true, false);
2462 case JOB_RELOAD_OR_START
:
2463 case JOB_TRY_RELOAD
:
2465 if (j
->state
== JOB_RUNNING
) {
2466 if (ns
== UNIT_ACTIVE
)
2467 job_finish_and_invalidate(j
, (flags
& UNIT_NOTIFY_RELOAD_FAILURE
) ? JOB_FAILED
: JOB_DONE
, true, false);
2468 else if (!IN_SET(ns
, UNIT_ACTIVATING
, UNIT_RELOADING
)) {
2471 if (UNIT_IS_INACTIVE_OR_FAILED(ns
))
2472 job_finish_and_invalidate(j
, ns
== UNIT_FAILED
? JOB_FAILED
: JOB_DONE
, true, false);
2480 case JOB_TRY_RESTART
:
2482 if (UNIT_IS_INACTIVE_OR_FAILED(ns
))
2483 job_finish_and_invalidate(j
, JOB_DONE
, true, false);
2484 else if (j
->state
== JOB_RUNNING
&& ns
!= UNIT_DEACTIVATING
) {
2486 job_finish_and_invalidate(j
, JOB_FAILED
, true, false);
2492 assert_not_reached("Job type unknown");
2498 void unit_notify(Unit
*u
, UnitActiveState os
, UnitActiveState ns
, UnitNotifyFlags flags
) {
2503 assert(os
< _UNIT_ACTIVE_STATE_MAX
);
2504 assert(ns
< _UNIT_ACTIVE_STATE_MAX
);
2506 /* Note that this is called for all low-level state changes, even if they might map to the same high-level
2507 * UnitActiveState! That means that ns == os is an expected behavior here. For example: if a mount point is
2508 * remounted this function will be called too! */
2512 /* Let's enqueue the change signal early. In case this unit has a job associated we want that this unit is in
2513 * the bus queue, so that any job change signal queued will force out the unit change signal first. */
2514 unit_add_to_dbus_queue(u
);
2516 /* Update timestamps for state changes */
2517 if (!MANAGER_IS_RELOADING(m
)) {
2518 dual_timestamp_get(&u
->state_change_timestamp
);
2520 if (UNIT_IS_INACTIVE_OR_FAILED(os
) && !UNIT_IS_INACTIVE_OR_FAILED(ns
))
2521 u
->inactive_exit_timestamp
= u
->state_change_timestamp
;
2522 else if (!UNIT_IS_INACTIVE_OR_FAILED(os
) && UNIT_IS_INACTIVE_OR_FAILED(ns
))
2523 u
->inactive_enter_timestamp
= u
->state_change_timestamp
;
2525 if (!UNIT_IS_ACTIVE_OR_RELOADING(os
) && UNIT_IS_ACTIVE_OR_RELOADING(ns
))
2526 u
->active_enter_timestamp
= u
->state_change_timestamp
;
2527 else if (UNIT_IS_ACTIVE_OR_RELOADING(os
) && !UNIT_IS_ACTIVE_OR_RELOADING(ns
))
2528 u
->active_exit_timestamp
= u
->state_change_timestamp
;
2531 /* Keep track of failed units */
2532 (void) manager_update_failed_units(m
, u
, ns
== UNIT_FAILED
);
2534 /* Make sure the cgroup and state files are always removed when we become inactive */
2535 if (UNIT_IS_INACTIVE_OR_FAILED(ns
)) {
2536 unit_prune_cgroup(u
);
2537 unit_unlink_state_files(u
);
2540 unit_update_on_console(u
);
2542 if (!MANAGER_IS_RELOADING(m
)) {
2545 /* Let's propagate state changes to the job */
2547 unexpected
= unit_process_job(u
->job
, ns
, flags
);
2551 /* If this state change happened without being requested by a job, then let's retroactively start or
2552 * stop dependencies. We skip that step when deserializing, since we don't want to create any
2553 * additional jobs just because something is already activated. */
2556 if (UNIT_IS_INACTIVE_OR_FAILED(os
) && UNIT_IS_ACTIVE_OR_ACTIVATING(ns
))
2557 retroactively_start_dependencies(u
);
2558 else if (UNIT_IS_ACTIVE_OR_ACTIVATING(os
) && UNIT_IS_INACTIVE_OR_DEACTIVATING(ns
))
2559 retroactively_stop_dependencies(u
);
2562 /* stop unneeded units regardless if going down was expected or not */
2563 if (UNIT_IS_INACTIVE_OR_FAILED(ns
))
2564 check_unneeded_dependencies(u
);
2566 if (ns
!= os
&& ns
== UNIT_FAILED
) {
2567 log_unit_debug(u
, "Unit entered failed state.");
2569 if (!(flags
& UNIT_NOTIFY_WILL_AUTO_RESTART
))
2570 unit_start_on_failure(u
);
2573 if (UNIT_IS_ACTIVE_OR_RELOADING(ns
) && !UNIT_IS_ACTIVE_OR_RELOADING(os
)) {
2574 /* This unit just finished starting up */
2576 unit_emit_audit_start(u
);
2577 manager_send_unit_plymouth(m
, u
);
2580 if (UNIT_IS_INACTIVE_OR_FAILED(ns
) && !UNIT_IS_INACTIVE_OR_FAILED(os
)) {
2581 /* This unit just stopped/failed. */
2583 unit_emit_audit_stop(u
, ns
);
2584 unit_log_resources(u
);
2588 manager_recheck_journal(m
);
2589 manager_recheck_dbus(m
);
2591 unit_trigger_notify(u
);
2593 if (!MANAGER_IS_RELOADING(m
)) {
2594 /* Maybe we finished startup and are now ready for being stopped because unneeded? */
2595 unit_submit_to_stop_when_unneeded_queue(u
);
2597 /* Maybe we finished startup, but something we needed has vanished? Let's die then. (This happens when
2598 * something BindsTo= to a Type=oneshot unit, as these units go directly from starting to inactive,
2599 * without ever entering started.) */
2600 unit_check_binds_to(u
);
2602 if (os
!= UNIT_FAILED
&& ns
== UNIT_FAILED
) {
2603 reason
= strjoina("unit ", u
->id
, " failed");
2604 emergency_action(m
, u
->failure_action
, 0, u
->reboot_arg
, unit_failure_action_exit_status(u
), reason
);
2605 } else if (!UNIT_IS_INACTIVE_OR_FAILED(os
) && ns
== UNIT_INACTIVE
) {
2606 reason
= strjoina("unit ", u
->id
, " succeeded");
2607 emergency_action(m
, u
->success_action
, 0, u
->reboot_arg
, unit_success_action_exit_status(u
), reason
);
2611 unit_add_to_gc_queue(u
);
2614 int unit_watch_pid(Unit
*u
, pid_t pid
, bool exclusive
) {
2618 assert(pid_is_valid(pid
));
2620 /* Watch a specific PID */
2622 /* Caller might be sure that this PID belongs to this unit only. Let's take this
2623 * opportunity to remove any stalled references to this PID as they can be created
2624 * easily (when watching a process which is not our direct child). */
2626 manager_unwatch_pid(u
->manager
, pid
);
2628 r
= set_ensure_allocated(&u
->pids
, NULL
);
2632 r
= hashmap_ensure_allocated(&u
->manager
->watch_pids
, NULL
);
2636 /* First try, let's add the unit keyed by "pid". */
2637 r
= hashmap_put(u
->manager
->watch_pids
, PID_TO_PTR(pid
), u
);
2643 /* OK, the "pid" key is already assigned to a different unit. Let's see if the "-pid" key (which points
2644 * to an array of Units rather than just a Unit), lists us already. */
2646 array
= hashmap_get(u
->manager
->watch_pids
, PID_TO_PTR(-pid
));
2648 for (; array
[n
]; n
++)
2652 if (found
) /* Found it already? if so, do nothing */
2657 /* Allocate a new array */
2658 new_array
= new(Unit
*, n
+ 2);
2662 memcpy_safe(new_array
, array
, sizeof(Unit
*) * n
);
2664 new_array
[n
+1] = NULL
;
2666 /* Add or replace the old array */
2667 r
= hashmap_replace(u
->manager
->watch_pids
, PID_TO_PTR(-pid
), new_array
);
2678 r
= set_put(u
->pids
, PID_TO_PTR(pid
));
2685 void unit_unwatch_pid(Unit
*u
, pid_t pid
) {
2689 assert(pid_is_valid(pid
));
2691 /* First let's drop the unit in case it's keyed as "pid". */
2692 (void) hashmap_remove_value(u
->manager
->watch_pids
, PID_TO_PTR(pid
), u
);
2694 /* Then, let's also drop the unit, in case it's in the array keyed by -pid */
2695 array
= hashmap_get(u
->manager
->watch_pids
, PID_TO_PTR(-pid
));
2699 /* Let's iterate through the array, dropping our own entry */
2700 for (n
= 0; array
[n
]; n
++)
2702 array
[m
++] = array
[n
];
2706 /* The array is now empty, remove the entire entry */
2707 assert(hashmap_remove(u
->manager
->watch_pids
, PID_TO_PTR(-pid
)) == array
);
2712 (void) set_remove(u
->pids
, PID_TO_PTR(pid
));
2715 void unit_unwatch_all_pids(Unit
*u
) {
2718 while (!set_isempty(u
->pids
))
2719 unit_unwatch_pid(u
, PTR_TO_PID(set_first(u
->pids
)));
2721 u
->pids
= set_free(u
->pids
);
2724 static void unit_tidy_watch_pids(Unit
*u
) {
2725 pid_t except1
, except2
;
2731 /* Cleans dead PIDs from our list */
2733 except1
= unit_main_pid(u
);
2734 except2
= unit_control_pid(u
);
2736 SET_FOREACH(e
, u
->pids
, i
) {
2737 pid_t pid
= PTR_TO_PID(e
);
2739 if (pid
== except1
|| pid
== except2
)
2742 if (!pid_is_unwaited(pid
))
2743 unit_unwatch_pid(u
, pid
);
2747 static int on_rewatch_pids_event(sd_event_source
*s
, void *userdata
) {
2753 unit_tidy_watch_pids(u
);
2754 unit_watch_all_pids(u
);
2756 /* If the PID set is empty now, then let's finish this off. */
2757 unit_synthesize_cgroup_empty_event(u
);
2762 int unit_enqueue_rewatch_pids(Unit
*u
) {
2767 if (!u
->cgroup_path
)
2770 r
= cg_unified_controller(SYSTEMD_CGROUP_CONTROLLER
);
2773 if (r
> 0) /* On unified we can use proper notifications */
2776 /* Enqueues a low-priority job that will clean up dead PIDs from our list of PIDs to watch and subscribe to new
2777 * PIDs that might have appeared. We do this in a delayed job because the work might be quite slow, as it
2778 * involves issuing kill(pid, 0) on all processes we watch. */
2780 if (!u
->rewatch_pids_event_source
) {
2781 _cleanup_(sd_event_source_unrefp
) sd_event_source
*s
= NULL
;
2783 r
= sd_event_add_defer(u
->manager
->event
, &s
, on_rewatch_pids_event
, u
);
2785 return log_error_errno(r
, "Failed to allocate event source for tidying watched PIDs: %m");
2787 r
= sd_event_source_set_priority(s
, SD_EVENT_PRIORITY_IDLE
);
2789 return log_error_errno(r
, "Failed to adjust priority of event source for tidying watched PIDs: %m");
2791 (void) sd_event_source_set_description(s
, "tidy-watch-pids");
2793 u
->rewatch_pids_event_source
= TAKE_PTR(s
);
2796 r
= sd_event_source_set_enabled(u
->rewatch_pids_event_source
, SD_EVENT_ONESHOT
);
2798 return log_error_errno(r
, "Failed to enable event source for tidying watched PIDs: %m");
2803 void unit_dequeue_rewatch_pids(Unit
*u
) {
2807 if (!u
->rewatch_pids_event_source
)
2810 r
= sd_event_source_set_enabled(u
->rewatch_pids_event_source
, SD_EVENT_OFF
);
2812 log_warning_errno(r
, "Failed to disable event source for tidying watched PIDs, ignoring: %m");
2814 u
->rewatch_pids_event_source
= sd_event_source_unref(u
->rewatch_pids_event_source
);
2817 bool unit_job_is_applicable(Unit
*u
, JobType j
) {
2819 assert(j
>= 0 && j
< _JOB_TYPE_MAX
);
2823 case JOB_VERIFY_ACTIVE
:
2826 /* Note that we don't check unit_can_start() here. That's because .device units and suchlike are not
2827 * startable by us but may appear due to external events, and it thus makes sense to permit enqueing
2832 /* Similar as above. However, perpetual units can never be stopped (neither explicitly nor due to
2833 * external events), hence it makes no sense to permit enqueing such a request either. */
2834 return !u
->perpetual
;
2837 case JOB_TRY_RESTART
:
2838 return unit_can_stop(u
) && unit_can_start(u
);
2841 case JOB_TRY_RELOAD
:
2842 return unit_can_reload(u
);
2844 case JOB_RELOAD_OR_START
:
2845 return unit_can_reload(u
) && unit_can_start(u
);
2848 assert_not_reached("Invalid job type");
2852 static void maybe_warn_about_dependency(Unit
*u
, const char *other
, UnitDependency dependency
) {
2855 /* Only warn about some unit types */
2856 if (!IN_SET(dependency
, UNIT_CONFLICTS
, UNIT_CONFLICTED_BY
, UNIT_BEFORE
, UNIT_AFTER
, UNIT_ON_FAILURE
, UNIT_TRIGGERS
, UNIT_TRIGGERED_BY
))
2859 if (streq_ptr(u
->id
, other
))
2860 log_unit_warning(u
, "Dependency %s=%s dropped", unit_dependency_to_string(dependency
), u
->id
);
2862 log_unit_warning(u
, "Dependency %s=%s dropped, merged into %s", unit_dependency_to_string(dependency
), strna(other
), u
->id
);
2865 static int unit_add_dependency_hashmap(
2868 UnitDependencyMask origin_mask
,
2869 UnitDependencyMask destination_mask
) {
2871 UnitDependencyInfo info
;
2876 assert(origin_mask
< _UNIT_DEPENDENCY_MASK_FULL
);
2877 assert(destination_mask
< _UNIT_DEPENDENCY_MASK_FULL
);
2878 assert(origin_mask
> 0 || destination_mask
> 0);
2880 r
= hashmap_ensure_allocated(h
, NULL
);
2884 assert_cc(sizeof(void*) == sizeof(info
));
2886 info
.data
= hashmap_get(*h
, other
);
2888 /* Entry already exists. Add in our mask. */
2890 if (FLAGS_SET(origin_mask
, info
.origin_mask
) &&
2891 FLAGS_SET(destination_mask
, info
.destination_mask
))
2894 info
.origin_mask
|= origin_mask
;
2895 info
.destination_mask
|= destination_mask
;
2897 r
= hashmap_update(*h
, other
, info
.data
);
2899 info
= (UnitDependencyInfo
) {
2900 .origin_mask
= origin_mask
,
2901 .destination_mask
= destination_mask
,
2904 r
= hashmap_put(*h
, other
, info
.data
);
2912 int unit_add_dependency(
2917 UnitDependencyMask mask
) {
2919 static const UnitDependency inverse_table
[_UNIT_DEPENDENCY_MAX
] = {
2920 [UNIT_REQUIRES
] = UNIT_REQUIRED_BY
,
2921 [UNIT_WANTS
] = UNIT_WANTED_BY
,
2922 [UNIT_REQUISITE
] = UNIT_REQUISITE_OF
,
2923 [UNIT_BINDS_TO
] = UNIT_BOUND_BY
,
2924 [UNIT_PART_OF
] = UNIT_CONSISTS_OF
,
2925 [UNIT_REQUIRED_BY
] = UNIT_REQUIRES
,
2926 [UNIT_REQUISITE_OF
] = UNIT_REQUISITE
,
2927 [UNIT_WANTED_BY
] = UNIT_WANTS
,
2928 [UNIT_BOUND_BY
] = UNIT_BINDS_TO
,
2929 [UNIT_CONSISTS_OF
] = UNIT_PART_OF
,
2930 [UNIT_CONFLICTS
] = UNIT_CONFLICTED_BY
,
2931 [UNIT_CONFLICTED_BY
] = UNIT_CONFLICTS
,
2932 [UNIT_BEFORE
] = UNIT_AFTER
,
2933 [UNIT_AFTER
] = UNIT_BEFORE
,
2934 [UNIT_ON_FAILURE
] = _UNIT_DEPENDENCY_INVALID
,
2935 [UNIT_REFERENCES
] = UNIT_REFERENCED_BY
,
2936 [UNIT_REFERENCED_BY
] = UNIT_REFERENCES
,
2937 [UNIT_TRIGGERS
] = UNIT_TRIGGERED_BY
,
2938 [UNIT_TRIGGERED_BY
] = UNIT_TRIGGERS
,
2939 [UNIT_PROPAGATES_RELOAD_TO
] = UNIT_RELOAD_PROPAGATED_FROM
,
2940 [UNIT_RELOAD_PROPAGATED_FROM
] = UNIT_PROPAGATES_RELOAD_TO
,
2941 [UNIT_JOINS_NAMESPACE_OF
] = UNIT_JOINS_NAMESPACE_OF
,
2943 Unit
*original_u
= u
, *original_other
= other
;
2947 assert(d
>= 0 && d
< _UNIT_DEPENDENCY_MAX
);
2950 u
= unit_follow_merge(u
);
2951 other
= unit_follow_merge(other
);
2953 /* We won't allow dependencies on ourselves. We will not
2954 * consider them an error however. */
2956 maybe_warn_about_dependency(original_u
, original_other
->id
, d
);
2960 if (d
== UNIT_AFTER
&& UNIT_VTABLE(u
)->refuse_after
) {
2961 log_unit_warning(u
, "Requested dependency After=%s ignored (%s units cannot be delayed).", other
->id
, unit_type_to_string(u
->type
));
2965 if (d
== UNIT_BEFORE
&& UNIT_VTABLE(other
)->refuse_after
) {
2966 log_unit_warning(u
, "Requested dependency Before=%s ignored (%s units cannot be delayed).", other
->id
, unit_type_to_string(other
->type
));
2970 if (d
== UNIT_ON_FAILURE
&& !UNIT_VTABLE(u
)->can_fail
) {
2971 log_unit_warning(u
, "Requested dependency OnFailure=%s ignored (%s units cannot fail).", other
->id
, unit_type_to_string(u
->type
));
2975 if (d
== UNIT_TRIGGERS
&& !UNIT_VTABLE(u
)->can_trigger
)
2976 return log_unit_error_errno(u
, SYNTHETIC_ERRNO(EINVAL
),
2977 "Requested dependency Triggers=%s refused (%s units cannot trigger other units).", other
->id
, unit_type_to_string(u
->type
));
2978 if (d
== UNIT_TRIGGERED_BY
&& !UNIT_VTABLE(other
)->can_trigger
)
2979 return log_unit_error_errno(u
, SYNTHETIC_ERRNO(EINVAL
),
2980 "Requested dependency TriggeredBy=%s refused (%s units cannot trigger other units).", other
->id
, unit_type_to_string(other
->type
));
2982 r
= unit_add_dependency_hashmap(u
->dependencies
+ d
, other
, mask
, 0);
2986 if (inverse_table
[d
] != _UNIT_DEPENDENCY_INVALID
&& inverse_table
[d
] != d
) {
2987 r
= unit_add_dependency_hashmap(other
->dependencies
+ inverse_table
[d
], u
, 0, mask
);
2992 if (add_reference
) {
2993 r
= unit_add_dependency_hashmap(u
->dependencies
+ UNIT_REFERENCES
, other
, mask
, 0);
2997 r
= unit_add_dependency_hashmap(other
->dependencies
+ UNIT_REFERENCED_BY
, u
, 0, mask
);
3002 unit_add_to_dbus_queue(u
);
3006 int unit_add_two_dependencies(Unit
*u
, UnitDependency d
, UnitDependency e
, Unit
*other
, bool add_reference
, UnitDependencyMask mask
) {
3011 r
= unit_add_dependency(u
, d
, other
, add_reference
, mask
);
3015 return unit_add_dependency(u
, e
, other
, add_reference
, mask
);
3018 static int resolve_template(Unit
*u
, const char *name
, char **buf
, const char **ret
) {
3026 if (!unit_name_is_valid(name
, UNIT_NAME_TEMPLATE
)) {
3033 r
= unit_name_replace_instance(name
, u
->instance
, buf
);
3035 _cleanup_free_
char *i
= NULL
;
3037 r
= unit_name_to_prefix(u
->id
, &i
);
3041 r
= unit_name_replace_instance(name
, i
, buf
);
3050 int unit_add_dependency_by_name(Unit
*u
, UnitDependency d
, const char *name
, bool add_reference
, UnitDependencyMask mask
) {
3051 _cleanup_free_
char *buf
= NULL
;
3058 r
= resolve_template(u
, name
, &buf
, &name
);
3062 r
= manager_load_unit(u
->manager
, name
, NULL
, NULL
, &other
);
3066 return unit_add_dependency(u
, d
, other
, add_reference
, mask
);
3069 int unit_add_two_dependencies_by_name(Unit
*u
, UnitDependency d
, UnitDependency e
, const char *name
, bool add_reference
, UnitDependencyMask mask
) {
3070 _cleanup_free_
char *buf
= NULL
;
3077 r
= resolve_template(u
, name
, &buf
, &name
);
3081 r
= manager_load_unit(u
->manager
, name
, NULL
, NULL
, &other
);
3085 return unit_add_two_dependencies(u
, d
, e
, other
, add_reference
, mask
);
3088 int set_unit_path(const char *p
) {
3089 /* This is mostly for debug purposes */
3090 if (setenv("SYSTEMD_UNIT_PATH", p
, 1) < 0)
3096 char *unit_dbus_path(Unit
*u
) {
3102 return unit_dbus_path_from_name(u
->id
);
3105 char *unit_dbus_path_invocation_id(Unit
*u
) {
3108 if (sd_id128_is_null(u
->invocation_id
))
3111 return unit_dbus_path_from_name(u
->invocation_id_string
);
3114 int unit_set_slice(Unit
*u
, Unit
*slice
) {
3118 /* Sets the unit slice if it has not been set before. Is extra
3119 * careful, to only allow this for units that actually have a
3120 * cgroup context. Also, we don't allow to set this for slices
3121 * (since the parent slice is derived from the name). Make
3122 * sure the unit we set is actually a slice. */
3124 if (!UNIT_HAS_CGROUP_CONTEXT(u
))
3127 if (u
->type
== UNIT_SLICE
)
3130 if (unit_active_state(u
) != UNIT_INACTIVE
)
3133 if (slice
->type
!= UNIT_SLICE
)
3136 if (unit_has_name(u
, SPECIAL_INIT_SCOPE
) &&
3137 !unit_has_name(slice
, SPECIAL_ROOT_SLICE
))
3140 if (UNIT_DEREF(u
->slice
) == slice
)
3143 /* Disallow slice changes if @u is already bound to cgroups */
3144 if (UNIT_ISSET(u
->slice
) && u
->cgroup_realized
)
3147 unit_ref_set(&u
->slice
, u
, slice
);
3151 int unit_set_default_slice(Unit
*u
) {
3152 const char *slice_name
;
3158 if (UNIT_ISSET(u
->slice
))
3162 _cleanup_free_
char *prefix
= NULL
, *escaped
= NULL
;
3164 /* Implicitly place all instantiated units in their
3165 * own per-template slice */
3167 r
= unit_name_to_prefix(u
->id
, &prefix
);
3171 /* The prefix is already escaped, but it might include
3172 * "-" which has a special meaning for slice units,
3173 * hence escape it here extra. */
3174 escaped
= unit_name_escape(prefix
);
3178 if (MANAGER_IS_SYSTEM(u
->manager
))
3179 slice_name
= strjoina("system-", escaped
, ".slice");
3181 slice_name
= strjoina(escaped
, ".slice");
3184 MANAGER_IS_SYSTEM(u
->manager
) && !unit_has_name(u
, SPECIAL_INIT_SCOPE
)
3185 ? SPECIAL_SYSTEM_SLICE
3186 : SPECIAL_ROOT_SLICE
;
3188 r
= manager_load_unit(u
->manager
, slice_name
, NULL
, NULL
, &slice
);
3192 return unit_set_slice(u
, slice
);
3195 const char *unit_slice_name(Unit
*u
) {
3198 if (!UNIT_ISSET(u
->slice
))
3201 return UNIT_DEREF(u
->slice
)->id
;
3204 int unit_load_related_unit(Unit
*u
, const char *type
, Unit
**_found
) {
3205 _cleanup_free_
char *t
= NULL
;
3212 r
= unit_name_change_suffix(u
->id
, type
, &t
);
3215 if (unit_has_name(u
, t
))
3218 r
= manager_load_unit(u
->manager
, t
, NULL
, NULL
, _found
);
3219 assert(r
< 0 || *_found
!= u
);
3223 static int signal_name_owner_changed(sd_bus_message
*message
, void *userdata
, sd_bus_error
*error
) {
3224 const char *new_owner
;
3231 r
= sd_bus_message_read(message
, "sss", NULL
, NULL
, &new_owner
);
3233 bus_log_parse_error(r
);
3237 if (UNIT_VTABLE(u
)->bus_name_owner_change
)
3238 UNIT_VTABLE(u
)->bus_name_owner_change(u
, empty_to_null(new_owner
));
3243 static int get_name_owner_handler(sd_bus_message
*message
, void *userdata
, sd_bus_error
*error
) {
3244 const sd_bus_error
*e
;
3245 const char *new_owner
;
3252 u
->get_name_owner_slot
= sd_bus_slot_unref(u
->get_name_owner_slot
);
3254 e
= sd_bus_message_get_error(message
);
3256 if (!sd_bus_error_has_name(e
, "org.freedesktop.DBus.Error.NameHasNoOwner"))
3257 log_unit_error(u
, "Unexpected error response from GetNameOwner(): %s", e
->message
);
3261 r
= sd_bus_message_read(message
, "s", &new_owner
);
3263 return bus_log_parse_error(r
);
3265 assert(!isempty(new_owner
));
3268 if (UNIT_VTABLE(u
)->bus_name_owner_change
)
3269 UNIT_VTABLE(u
)->bus_name_owner_change(u
, new_owner
);
3274 int unit_install_bus_match(Unit
*u
, sd_bus
*bus
, const char *name
) {
3282 if (u
->match_bus_slot
|| u
->get_name_owner_slot
)
3285 match
= strjoina("type='signal',"
3286 "sender='org.freedesktop.DBus',"
3287 "path='/org/freedesktop/DBus',"
3288 "interface='org.freedesktop.DBus',"
3289 "member='NameOwnerChanged',"
3290 "arg0='", name
, "'");
3292 r
= sd_bus_add_match_async(bus
, &u
->match_bus_slot
, match
, signal_name_owner_changed
, NULL
, u
);
3296 r
= sd_bus_call_method_async(
3298 &u
->get_name_owner_slot
,
3299 "org.freedesktop.DBus",
3300 "/org/freedesktop/DBus",
3301 "org.freedesktop.DBus",
3303 get_name_owner_handler
,
3307 u
->match_bus_slot
= sd_bus_slot_unref(u
->match_bus_slot
);
3311 log_unit_debug(u
, "Watching D-Bus name '%s'.", name
);
3315 int unit_watch_bus_name(Unit
*u
, const char *name
) {
3321 /* Watch a specific name on the bus. We only support one unit
3322 * watching each name for now. */
3324 if (u
->manager
->api_bus
) {
3325 /* If the bus is already available, install the match directly.
3326 * Otherwise, just put the name in the list. bus_setup_api() will take care later. */
3327 r
= unit_install_bus_match(u
, u
->manager
->api_bus
, name
);
3329 return log_warning_errno(r
, "Failed to subscribe to NameOwnerChanged signal for '%s': %m", name
);
3332 r
= hashmap_put(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
);
3336 return log_warning_errno(r
, "Failed to put bus name to hashmap: %m");
3342 void unit_unwatch_bus_name(Unit
*u
, const char *name
) {
3346 (void) hashmap_remove_value(u
->manager
->watch_bus
, name
, u
);
3347 u
->match_bus_slot
= sd_bus_slot_unref(u
->match_bus_slot
);
3348 u
->get_name_owner_slot
= sd_bus_slot_unref(u
->get_name_owner_slot
);
3351 bool unit_can_serialize(Unit
*u
) {
3354 return UNIT_VTABLE(u
)->serialize
&& UNIT_VTABLE(u
)->deserialize_item
;
3357 static int serialize_cgroup_mask(FILE *f
, const char *key
, CGroupMask mask
) {
3358 _cleanup_free_
char *s
= NULL
;
3367 r
= cg_mask_to_string(mask
, &s
);
3369 return log_error_errno(r
, "Failed to format cgroup mask: %m");
3371 return serialize_item(f
, key
, s
);
3374 static const char *const ip_accounting_metric_field
[_CGROUP_IP_ACCOUNTING_METRIC_MAX
] = {
3375 [CGROUP_IP_INGRESS_BYTES
] = "ip-accounting-ingress-bytes",
3376 [CGROUP_IP_INGRESS_PACKETS
] = "ip-accounting-ingress-packets",
3377 [CGROUP_IP_EGRESS_BYTES
] = "ip-accounting-egress-bytes",
3378 [CGROUP_IP_EGRESS_PACKETS
] = "ip-accounting-egress-packets",
3381 static const char *const io_accounting_metric_field_base
[_CGROUP_IO_ACCOUNTING_METRIC_MAX
] = {
3382 [CGROUP_IO_READ_BYTES
] = "io-accounting-read-bytes-base",
3383 [CGROUP_IO_WRITE_BYTES
] = "io-accounting-write-bytes-base",
3384 [CGROUP_IO_READ_OPERATIONS
] = "io-accounting-read-operations-base",
3385 [CGROUP_IO_WRITE_OPERATIONS
] = "io-accounting-write-operations-base",
3388 static const char *const io_accounting_metric_field_last
[_CGROUP_IO_ACCOUNTING_METRIC_MAX
] = {
3389 [CGROUP_IO_READ_BYTES
] = "io-accounting-read-bytes-last",
3390 [CGROUP_IO_WRITE_BYTES
] = "io-accounting-write-bytes-last",
3391 [CGROUP_IO_READ_OPERATIONS
] = "io-accounting-read-operations-last",
3392 [CGROUP_IO_WRITE_OPERATIONS
] = "io-accounting-write-operations-last",
3395 int unit_serialize(Unit
*u
, FILE *f
, FDSet
*fds
, bool serialize_jobs
) {
3396 CGroupIPAccountingMetric m
;
3403 if (unit_can_serialize(u
)) {
3404 r
= UNIT_VTABLE(u
)->serialize(u
, f
, fds
);
3409 (void) serialize_dual_timestamp(f
, "state-change-timestamp", &u
->state_change_timestamp
);
3411 (void) serialize_dual_timestamp(f
, "inactive-exit-timestamp", &u
->inactive_exit_timestamp
);
3412 (void) serialize_dual_timestamp(f
, "active-enter-timestamp", &u
->active_enter_timestamp
);
3413 (void) serialize_dual_timestamp(f
, "active-exit-timestamp", &u
->active_exit_timestamp
);
3414 (void) serialize_dual_timestamp(f
, "inactive-enter-timestamp", &u
->inactive_enter_timestamp
);
3416 (void) serialize_dual_timestamp(f
, "condition-timestamp", &u
->condition_timestamp
);
3417 (void) serialize_dual_timestamp(f
, "assert-timestamp", &u
->assert_timestamp
);
3419 if (dual_timestamp_is_set(&u
->condition_timestamp
))
3420 (void) serialize_bool(f
, "condition-result", u
->condition_result
);
3422 if (dual_timestamp_is_set(&u
->assert_timestamp
))
3423 (void) serialize_bool(f
, "assert-result", u
->assert_result
);
3425 (void) serialize_bool(f
, "transient", u
->transient
);
3426 (void) serialize_bool(f
, "in-audit", u
->in_audit
);
3428 (void) serialize_bool(f
, "exported-invocation-id", u
->exported_invocation_id
);
3429 (void) serialize_bool(f
, "exported-log-level-max", u
->exported_log_level_max
);
3430 (void) serialize_bool(f
, "exported-log-extra-fields", u
->exported_log_extra_fields
);
3431 (void) serialize_bool(f
, "exported-log-rate-limit-interval", u
->exported_log_ratelimit_interval
);
3432 (void) serialize_bool(f
, "exported-log-rate-limit-burst", u
->exported_log_ratelimit_burst
);
3434 (void) serialize_item_format(f
, "cpu-usage-base", "%" PRIu64
, u
->cpu_usage_base
);
3435 if (u
->cpu_usage_last
!= NSEC_INFINITY
)
3436 (void) serialize_item_format(f
, "cpu-usage-last", "%" PRIu64
, u
->cpu_usage_last
);
3438 if (u
->oom_kill_last
> 0)
3439 (void) serialize_item_format(f
, "oom-kill-last", "%" PRIu64
, u
->oom_kill_last
);
3441 for (CGroupIOAccountingMetric im
= 0; im
< _CGROUP_IO_ACCOUNTING_METRIC_MAX
; im
++) {
3442 (void) serialize_item_format(f
, io_accounting_metric_field_base
[im
], "%" PRIu64
, u
->io_accounting_base
[im
]);
3444 if (u
->io_accounting_last
[im
] != UINT64_MAX
)
3445 (void) serialize_item_format(f
, io_accounting_metric_field_last
[im
], "%" PRIu64
, u
->io_accounting_last
[im
]);
3449 (void) serialize_item(f
, "cgroup", u
->cgroup_path
);
3451 (void) serialize_bool(f
, "cgroup-realized", u
->cgroup_realized
);
3452 (void) serialize_cgroup_mask(f
, "cgroup-realized-mask", u
->cgroup_realized_mask
);
3453 (void) serialize_cgroup_mask(f
, "cgroup-enabled-mask", u
->cgroup_enabled_mask
);
3454 (void) serialize_cgroup_mask(f
, "cgroup-invalidated-mask", u
->cgroup_invalidated_mask
);
3456 if (uid_is_valid(u
->ref_uid
))
3457 (void) serialize_item_format(f
, "ref-uid", UID_FMT
, u
->ref_uid
);
3458 if (gid_is_valid(u
->ref_gid
))
3459 (void) serialize_item_format(f
, "ref-gid", GID_FMT
, u
->ref_gid
);
3461 if (!sd_id128_is_null(u
->invocation_id
))
3462 (void) serialize_item_format(f
, "invocation-id", SD_ID128_FORMAT_STR
, SD_ID128_FORMAT_VAL(u
->invocation_id
));
3464 bus_track_serialize(u
->bus_track
, f
, "ref");
3466 for (m
= 0; m
< _CGROUP_IP_ACCOUNTING_METRIC_MAX
; m
++) {
3469 r
= unit_get_ip_accounting(u
, m
, &v
);
3471 (void) serialize_item_format(f
, ip_accounting_metric_field
[m
], "%" PRIu64
, v
);
3474 if (serialize_jobs
) {
3477 job_serialize(u
->job
, f
);
3482 job_serialize(u
->nop_job
, f
);
3491 static int unit_deserialize_job(Unit
*u
, FILE *f
) {
3492 _cleanup_(job_freep
) Job
*j
= NULL
;
3502 r
= job_deserialize(j
, f
);
3506 r
= job_install_deserialized(j
);
3514 int unit_deserialize(Unit
*u
, FILE *f
, FDSet
*fds
) {
3522 _cleanup_free_
char *line
= NULL
;
3527 r
= read_line(f
, LONG_LINE_MAX
, &line
);
3529 return log_error_errno(r
, "Failed to read serialization line: %m");
3530 if (r
== 0) /* eof */
3534 if (isempty(l
)) /* End marker */
3537 k
= strcspn(l
, "=");
3545 if (streq(l
, "job")) {
3547 /* New-style serialized job */
3548 r
= unit_deserialize_job(u
, f
);
3551 } else /* Legacy for pre-44 */
3552 log_unit_warning(u
, "Update from too old systemd versions are unsupported, cannot deserialize job: %s", v
);
3554 } else if (streq(l
, "state-change-timestamp")) {
3555 (void) deserialize_dual_timestamp(v
, &u
->state_change_timestamp
);
3557 } else if (streq(l
, "inactive-exit-timestamp")) {
3558 (void) deserialize_dual_timestamp(v
, &u
->inactive_exit_timestamp
);
3560 } else if (streq(l
, "active-enter-timestamp")) {
3561 (void) deserialize_dual_timestamp(v
, &u
->active_enter_timestamp
);
3563 } else if (streq(l
, "active-exit-timestamp")) {
3564 (void) deserialize_dual_timestamp(v
, &u
->active_exit_timestamp
);
3566 } else if (streq(l
, "inactive-enter-timestamp")) {
3567 (void) deserialize_dual_timestamp(v
, &u
->inactive_enter_timestamp
);
3569 } else if (streq(l
, "condition-timestamp")) {
3570 (void) deserialize_dual_timestamp(v
, &u
->condition_timestamp
);
3572 } else if (streq(l
, "assert-timestamp")) {
3573 (void) deserialize_dual_timestamp(v
, &u
->assert_timestamp
);
3575 } else if (streq(l
, "condition-result")) {
3577 r
= parse_boolean(v
);
3579 log_unit_debug(u
, "Failed to parse condition result value %s, ignoring.", v
);
3581 u
->condition_result
= r
;
3585 } else if (streq(l
, "assert-result")) {
3587 r
= parse_boolean(v
);
3589 log_unit_debug(u
, "Failed to parse assert result value %s, ignoring.", v
);
3591 u
->assert_result
= r
;
3595 } else if (streq(l
, "transient")) {
3597 r
= parse_boolean(v
);
3599 log_unit_debug(u
, "Failed to parse transient bool %s, ignoring.", v
);
3605 } else if (streq(l
, "in-audit")) {
3607 r
= parse_boolean(v
);
3609 log_unit_debug(u
, "Failed to parse in-audit bool %s, ignoring.", v
);
3615 } else if (streq(l
, "exported-invocation-id")) {
3617 r
= parse_boolean(v
);
3619 log_unit_debug(u
, "Failed to parse exported invocation ID bool %s, ignoring.", v
);
3621 u
->exported_invocation_id
= r
;
3625 } else if (streq(l
, "exported-log-level-max")) {
3627 r
= parse_boolean(v
);
3629 log_unit_debug(u
, "Failed to parse exported log level max bool %s, ignoring.", v
);
3631 u
->exported_log_level_max
= r
;
3635 } else if (streq(l
, "exported-log-extra-fields")) {
3637 r
= parse_boolean(v
);
3639 log_unit_debug(u
, "Failed to parse exported log extra fields bool %s, ignoring.", v
);
3641 u
->exported_log_extra_fields
= r
;
3645 } else if (streq(l
, "exported-log-rate-limit-interval")) {
3647 r
= parse_boolean(v
);
3649 log_unit_debug(u
, "Failed to parse exported log rate limit interval %s, ignoring.", v
);
3651 u
->exported_log_ratelimit_interval
= r
;
3655 } else if (streq(l
, "exported-log-rate-limit-burst")) {
3657 r
= parse_boolean(v
);
3659 log_unit_debug(u
, "Failed to parse exported log rate limit burst %s, ignoring.", v
);
3661 u
->exported_log_ratelimit_burst
= r
;
3665 } else if (STR_IN_SET(l
, "cpu-usage-base", "cpuacct-usage-base")) {
3667 r
= safe_atou64(v
, &u
->cpu_usage_base
);
3669 log_unit_debug(u
, "Failed to parse CPU usage base %s, ignoring.", v
);
3673 } else if (streq(l
, "cpu-usage-last")) {
3675 r
= safe_atou64(v
, &u
->cpu_usage_last
);
3677 log_unit_debug(u
, "Failed to read CPU usage last %s, ignoring.", v
);
3681 } else if (streq(l
, "oom-kill-last")) {
3683 r
= safe_atou64(v
, &u
->oom_kill_last
);
3685 log_unit_debug(u
, "Failed to read OOM kill last %s, ignoring.", v
);
3689 } else if (streq(l
, "cgroup")) {
3691 r
= unit_set_cgroup_path(u
, v
);
3693 log_unit_debug_errno(u
, r
, "Failed to set cgroup path %s, ignoring: %m", v
);
3695 (void) unit_watch_cgroup(u
);
3696 (void) unit_watch_cgroup_memory(u
);
3699 } else if (streq(l
, "cgroup-realized")) {
3702 b
= parse_boolean(v
);
3704 log_unit_debug(u
, "Failed to parse cgroup-realized bool %s, ignoring.", v
);
3706 u
->cgroup_realized
= b
;
3710 } else if (streq(l
, "cgroup-realized-mask")) {
3712 r
= cg_mask_from_string(v
, &u
->cgroup_realized_mask
);
3714 log_unit_debug(u
, "Failed to parse cgroup-realized-mask %s, ignoring.", v
);
3717 } else if (streq(l
, "cgroup-enabled-mask")) {
3719 r
= cg_mask_from_string(v
, &u
->cgroup_enabled_mask
);
3721 log_unit_debug(u
, "Failed to parse cgroup-enabled-mask %s, ignoring.", v
);
3724 } else if (streq(l
, "cgroup-invalidated-mask")) {
3726 r
= cg_mask_from_string(v
, &u
->cgroup_invalidated_mask
);
3728 log_unit_debug(u
, "Failed to parse cgroup-invalidated-mask %s, ignoring.", v
);
3731 } else if (streq(l
, "ref-uid")) {
3734 r
= parse_uid(v
, &uid
);
3736 log_unit_debug(u
, "Failed to parse referenced UID %s, ignoring.", v
);
3738 unit_ref_uid_gid(u
, uid
, GID_INVALID
);
3742 } else if (streq(l
, "ref-gid")) {
3745 r
= parse_gid(v
, &gid
);
3747 log_unit_debug(u
, "Failed to parse referenced GID %s, ignoring.", v
);
3749 unit_ref_uid_gid(u
, UID_INVALID
, gid
);
3753 } else if (streq(l
, "ref")) {
3755 r
= strv_extend(&u
->deserialized_refs
, v
);
3760 } else if (streq(l
, "invocation-id")) {
3763 r
= sd_id128_from_string(v
, &id
);
3765 log_unit_debug(u
, "Failed to parse invocation id %s, ignoring.", v
);
3767 r
= unit_set_invocation_id(u
, id
);
3769 log_unit_warning_errno(u
, r
, "Failed to set invocation ID for unit: %m");
3775 /* Check if this is an IP accounting metric serialization field */
3776 m
= string_table_lookup(ip_accounting_metric_field
, ELEMENTSOF(ip_accounting_metric_field
), l
);
3780 r
= safe_atou64(v
, &c
);
3782 log_unit_debug(u
, "Failed to parse IP accounting value %s, ignoring.", v
);
3784 u
->ip_accounting_extra
[m
] = c
;
3788 m
= string_table_lookup(io_accounting_metric_field_base
, ELEMENTSOF(io_accounting_metric_field_base
), l
);
3792 r
= safe_atou64(v
, &c
);
3794 log_unit_debug(u
, "Failed to parse IO accounting base value %s, ignoring.", v
);
3796 u
->io_accounting_base
[m
] = c
;
3800 m
= string_table_lookup(io_accounting_metric_field_last
, ELEMENTSOF(io_accounting_metric_field_last
), l
);
3804 r
= safe_atou64(v
, &c
);
3806 log_unit_debug(u
, "Failed to parse IO accounting last value %s, ignoring.", v
);
3808 u
->io_accounting_last
[m
] = c
;
3812 if (unit_can_serialize(u
)) {
3813 r
= exec_runtime_deserialize_compat(u
, l
, v
, fds
);
3815 log_unit_warning(u
, "Failed to deserialize runtime parameter '%s', ignoring.", l
);
3819 /* Returns positive if key was handled by the call */
3823 r
= UNIT_VTABLE(u
)->deserialize_item(u
, l
, v
, fds
);
3825 log_unit_warning(u
, "Failed to deserialize unit parameter '%s', ignoring.", l
);
3829 /* Versions before 228 did not carry a state change timestamp. In this case, take the current time. This is
3830 * useful, so that timeouts based on this timestamp don't trigger too early, and is in-line with the logic from
3831 * before 228 where the base for timeouts was not persistent across reboots. */
3833 if (!dual_timestamp_is_set(&u
->state_change_timestamp
))
3834 dual_timestamp_get(&u
->state_change_timestamp
);
3836 /* Let's make sure that everything that is deserialized also gets any potential new cgroup settings applied
3837 * after we are done. For that we invalidate anything already realized, so that we can realize it again. */
3838 unit_invalidate_cgroup(u
, _CGROUP_MASK_ALL
);
3839 unit_invalidate_cgroup_bpf(u
);
3844 int unit_deserialize_skip(FILE *f
) {
3848 /* Skip serialized data for this unit. We don't know what it is. */
3851 _cleanup_free_
char *line
= NULL
;
3854 r
= read_line(f
, LONG_LINE_MAX
, &line
);
3856 return log_error_errno(r
, "Failed to read serialization line: %m");
3868 int unit_add_node_dependency(Unit
*u
, const char *what
, UnitDependency dep
, UnitDependencyMask mask
) {
3870 _cleanup_free_
char *e
= NULL
;
3875 /* Adds in links to the device node that this unit is based on */
3879 if (!is_device_path(what
))
3882 /* When device units aren't supported (such as in a
3883 * container), don't create dependencies on them. */
3884 if (!unit_type_supported(UNIT_DEVICE
))
3887 r
= unit_name_from_path(what
, ".device", &e
);
3891 r
= manager_load_unit(u
->manager
, e
, NULL
, NULL
, &device
);
3895 if (dep
== UNIT_REQUIRES
&& device_shall_be_bound_by(device
, u
))
3896 dep
= UNIT_BINDS_TO
;
3898 return unit_add_two_dependencies(u
, UNIT_AFTER
,
3899 MANAGER_IS_SYSTEM(u
->manager
) ? dep
: UNIT_WANTS
,
3900 device
, true, mask
);
3903 int unit_coldplug(Unit
*u
) {
3910 /* Make sure we don't enter a loop, when coldplugging recursively. */
3914 u
->coldplugged
= true;
3916 STRV_FOREACH(i
, u
->deserialized_refs
) {
3917 q
= bus_unit_track_add_name(u
, *i
);
3918 if (q
< 0 && r
>= 0)
3921 u
->deserialized_refs
= strv_free(u
->deserialized_refs
);
3923 if (UNIT_VTABLE(u
)->coldplug
) {
3924 q
= UNIT_VTABLE(u
)->coldplug(u
);
3925 if (q
< 0 && r
>= 0)
3929 uj
= u
->job
?: u
->nop_job
;
3931 q
= job_coldplug(uj
);
3932 if (q
< 0 && r
>= 0)
3939 void unit_catchup(Unit
*u
) {
3942 if (UNIT_VTABLE(u
)->catchup
)
3943 UNIT_VTABLE(u
)->catchup(u
);
3946 static bool fragment_mtime_newer(const char *path
, usec_t mtime
, bool path_masked
) {
3952 /* If the source is some virtual kernel file system, then we assume we watch it anyway, and hence pretend we
3953 * are never out-of-date. */
3954 if (PATH_STARTSWITH_SET(path
, "/proc", "/sys"))
3957 if (stat(path
, &st
) < 0)
3958 /* What, cannot access this anymore? */
3962 /* For masked files check if they are still so */
3963 return !null_or_empty(&st
);
3965 /* For non-empty files check the mtime */
3966 return timespec_load(&st
.st_mtim
) > mtime
;
3971 bool unit_need_daemon_reload(Unit
*u
) {
3972 _cleanup_strv_free_
char **t
= NULL
;
3977 /* For unit files, we allow masking… */
3978 if (fragment_mtime_newer(u
->fragment_path
, u
->fragment_mtime
,
3979 u
->load_state
== UNIT_MASKED
))
3982 /* Source paths should not be masked… */
3983 if (fragment_mtime_newer(u
->source_path
, u
->source_mtime
, false))
3986 if (u
->load_state
== UNIT_LOADED
)
3987 (void) unit_find_dropin_paths(u
, &t
);
3988 if (!strv_equal(u
->dropin_paths
, t
))
3991 /* … any drop-ins that are masked are simply omitted from the list. */
3992 STRV_FOREACH(path
, u
->dropin_paths
)
3993 if (fragment_mtime_newer(*path
, u
->dropin_mtime
, false))
3999 void unit_reset_failed(Unit
*u
) {
4002 if (UNIT_VTABLE(u
)->reset_failed
)
4003 UNIT_VTABLE(u
)->reset_failed(u
);
4005 ratelimit_reset(&u
->start_ratelimit
);
4006 u
->start_limit_hit
= false;
4009 Unit
*unit_following(Unit
*u
) {
4012 if (UNIT_VTABLE(u
)->following
)
4013 return UNIT_VTABLE(u
)->following(u
);
4018 bool unit_stop_pending(Unit
*u
) {
4021 /* This call does check the current state of the unit. It's
4022 * hence useful to be called from state change calls of the
4023 * unit itself, where the state isn't updated yet. This is
4024 * different from unit_inactive_or_pending() which checks both
4025 * the current state and for a queued job. */
4027 return unit_has_job_type(u
, JOB_STOP
);
4030 bool unit_inactive_or_pending(Unit
*u
) {
4033 /* Returns true if the unit is inactive or going down */
4035 if (UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(u
)))
4038 if (unit_stop_pending(u
))
4044 bool unit_active_or_pending(Unit
*u
) {
4047 /* Returns true if the unit is active or going up */
4049 if (UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(u
)))
4053 IN_SET(u
->job
->type
, JOB_START
, JOB_RELOAD_OR_START
, JOB_RESTART
))
4059 bool unit_will_restart_default(Unit
*u
) {
4062 return unit_has_job_type(u
, 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
->protect_kernel_logs
)
4308 ec
->capability_bounding_set
&= ~(UINT64_C(1) << CAP_SYSLOG
);
4310 if (ec
->protect_clock
)
4311 ec
->capability_bounding_set
&= ~((UINT64_C(1) << CAP_SYS_TIME
) | (UINT64_C(1) << CAP_WAKE_ALARM
));
4313 if (ec
->dynamic_user
) {
4315 r
= user_from_unit_name(u
, &ec
->user
);
4321 ec
->group
= strdup(ec
->user
);
4326 /* If the dynamic user option is on, let's make sure that the unit can't leave its
4327 * UID/GID around in the file system or on IPC objects. Hence enforce a strict
4330 ec
->private_tmp
= true;
4331 ec
->remove_ipc
= true;
4332 ec
->protect_system
= PROTECT_SYSTEM_STRICT
;
4333 if (ec
->protect_home
== PROTECT_HOME_NO
)
4334 ec
->protect_home
= PROTECT_HOME_READ_ONLY
;
4336 /* Make sure this service can neither benefit from SUID/SGID binaries nor create
4338 ec
->no_new_privileges
= true;
4339 ec
->restrict_suid_sgid
= true;
4343 cc
= unit_get_cgroup_context(u
);
4346 if (ec
->private_devices
&&
4347 cc
->device_policy
== CGROUP_DEVICE_POLICY_AUTO
)
4348 cc
->device_policy
= CGROUP_DEVICE_POLICY_CLOSED
;
4350 if (ec
->root_image
&&
4351 (cc
->device_policy
!= CGROUP_DEVICE_POLICY_AUTO
|| cc
->device_allow
)) {
4353 /* When RootImage= is specified, the following devices are touched. */
4354 r
= cgroup_add_device_allow(cc
, "/dev/loop-control", "rw");
4358 r
= cgroup_add_device_allow(cc
, "block-loop", "rwm");
4362 r
= cgroup_add_device_allow(cc
, "block-blkext", "rwm");
4366 /* Make sure "block-loop" can be resolved, i.e. make sure "loop" shows up in /proc/devices */
4367 r
= unit_add_two_dependencies_by_name(u
, UNIT_AFTER
, UNIT_WANTS
, "modprobe@loop.service", true, UNIT_DEPENDENCY_FILE
);
4372 if (ec
->protect_clock
) {
4373 r
= cgroup_add_device_allow(cc
, "char-rtc", "r");
4382 ExecContext
*unit_get_exec_context(Unit
*u
) {
4389 offset
= UNIT_VTABLE(u
)->exec_context_offset
;
4393 return (ExecContext
*) ((uint8_t*) u
+ offset
);
4396 KillContext
*unit_get_kill_context(Unit
*u
) {
4403 offset
= UNIT_VTABLE(u
)->kill_context_offset
;
4407 return (KillContext
*) ((uint8_t*) u
+ offset
);
4410 CGroupContext
*unit_get_cgroup_context(Unit
*u
) {
4416 offset
= UNIT_VTABLE(u
)->cgroup_context_offset
;
4420 return (CGroupContext
*) ((uint8_t*) u
+ offset
);
4423 ExecRuntime
*unit_get_exec_runtime(Unit
*u
) {
4429 offset
= UNIT_VTABLE(u
)->exec_runtime_offset
;
4433 return *(ExecRuntime
**) ((uint8_t*) u
+ offset
);
4436 static const char* unit_drop_in_dir(Unit
*u
, UnitWriteFlags flags
) {
4439 if (UNIT_WRITE_FLAGS_NOOP(flags
))
4442 if (u
->transient
) /* Redirect drop-ins for transient units always into the transient directory. */
4443 return u
->manager
->lookup_paths
.transient
;
4445 if (flags
& UNIT_PERSISTENT
)
4446 return u
->manager
->lookup_paths
.persistent_control
;
4448 if (flags
& UNIT_RUNTIME
)
4449 return u
->manager
->lookup_paths
.runtime_control
;
4454 char* unit_escape_setting(const char *s
, UnitWriteFlags flags
, char **buf
) {
4460 /* Escapes the input string as requested. Returns the escaped string. If 'buf' is specified then the allocated
4461 * return buffer pointer is also written to *buf, except if no escaping was necessary, in which case *buf is
4462 * set to NULL, and the input pointer is returned as-is. This means the return value always contains a properly
4463 * escaped version, but *buf when passed only contains a pointer if an allocation was necessary. If *buf is
4464 * not specified, then the return value always needs to be freed. Callers can use this to optimize memory
4467 if (flags
& UNIT_ESCAPE_SPECIFIERS
) {
4468 ret
= specifier_escape(s
);
4475 if (flags
& UNIT_ESCAPE_C
) {
4488 return ret
?: (char*) s
;
4491 return ret
?: strdup(s
);
4494 char* unit_concat_strv(char **l
, UnitWriteFlags flags
) {
4495 _cleanup_free_
char *result
= NULL
;
4496 size_t n
= 0, allocated
= 0;
4499 /* Takes a list of strings, escapes them, and concatenates them. This may be used to format command lines in a
4500 * way suitable for ExecStart= stanzas */
4502 STRV_FOREACH(i
, l
) {
4503 _cleanup_free_
char *buf
= NULL
;
4508 p
= unit_escape_setting(*i
, flags
, &buf
);
4512 a
= (n
> 0) + 1 + strlen(p
) + 1; /* separating space + " + entry + " */
4513 if (!GREEDY_REALLOC(result
, allocated
, n
+ a
+ 1))
4527 if (!GREEDY_REALLOC(result
, allocated
, n
+ 1))
4532 return TAKE_PTR(result
);
4535 int unit_write_setting(Unit
*u
, UnitWriteFlags flags
, const char *name
, const char *data
) {
4536 _cleanup_free_
char *p
= NULL
, *q
= NULL
, *escaped
= NULL
;
4537 const char *dir
, *wrapped
;
4544 if (UNIT_WRITE_FLAGS_NOOP(flags
))
4547 data
= unit_escape_setting(data
, flags
, &escaped
);
4551 /* Prefix the section header. If we are writing this out as transient file, then let's suppress this if the
4552 * previous section header is the same */
4554 if (flags
& UNIT_PRIVATE
) {
4555 if (!UNIT_VTABLE(u
)->private_section
)
4558 if (!u
->transient_file
|| u
->last_section_private
< 0)
4559 data
= strjoina("[", UNIT_VTABLE(u
)->private_section
, "]\n", data
);
4560 else if (u
->last_section_private
== 0)
4561 data
= strjoina("\n[", UNIT_VTABLE(u
)->private_section
, "]\n", data
);
4563 if (!u
->transient_file
|| u
->last_section_private
< 0)
4564 data
= strjoina("[Unit]\n", data
);
4565 else if (u
->last_section_private
> 0)
4566 data
= strjoina("\n[Unit]\n", data
);
4569 if (u
->transient_file
) {
4570 /* When this is a transient unit file in creation, then let's not create a new drop-in but instead
4571 * write to the transient unit file. */
4572 fputs(data
, u
->transient_file
);
4574 if (!endswith(data
, "\n"))
4575 fputc('\n', u
->transient_file
);
4577 /* Remember which section we wrote this entry to */
4578 u
->last_section_private
= !!(flags
& UNIT_PRIVATE
);
4582 dir
= unit_drop_in_dir(u
, flags
);
4586 wrapped
= strjoina("# This is a drop-in unit file extension, created via \"systemctl set-property\"\n"
4587 "# or an equivalent operation. Do not edit.\n",
4591 r
= drop_in_file(dir
, u
->id
, 50, name
, &p
, &q
);
4595 (void) mkdir_p_label(p
, 0755);
4597 /* Make sure the drop-in dir is registered in our path cache. This way we don't need to stupidly
4598 * recreate the cache after every drop-in we write. */
4599 if (u
->manager
->unit_path_cache
) {
4600 r
= set_put_strdup(u
->manager
->unit_path_cache
, p
);
4605 r
= write_string_file_atomic_label(q
, wrapped
);
4609 r
= strv_push(&u
->dropin_paths
, q
);
4614 strv_uniq(u
->dropin_paths
);
4616 u
->dropin_mtime
= now(CLOCK_REALTIME
);
4621 int unit_write_settingf(Unit
*u
, UnitWriteFlags flags
, const char *name
, const char *format
, ...) {
4622 _cleanup_free_
char *p
= NULL
;
4630 if (UNIT_WRITE_FLAGS_NOOP(flags
))
4633 va_start(ap
, format
);
4634 r
= vasprintf(&p
, format
, ap
);
4640 return unit_write_setting(u
, flags
, name
, p
);
4643 int unit_make_transient(Unit
*u
) {
4644 _cleanup_free_
char *path
= NULL
;
4649 if (!UNIT_VTABLE(u
)->can_transient
)
4652 (void) mkdir_p_label(u
->manager
->lookup_paths
.transient
, 0755);
4654 path
= path_join(u
->manager
->lookup_paths
.transient
, u
->id
);
4658 /* Let's open the file we'll write the transient settings into. This file is kept open as long as we are
4659 * creating the transient, and is closed in unit_load(), as soon as we start loading the file. */
4661 RUN_WITH_UMASK(0022) {
4662 f
= fopen(path
, "we");
4667 safe_fclose(u
->transient_file
);
4668 u
->transient_file
= f
;
4670 free_and_replace(u
->fragment_path
, path
);
4672 u
->source_path
= mfree(u
->source_path
);
4673 u
->dropin_paths
= strv_free(u
->dropin_paths
);
4674 u
->fragment_mtime
= u
->source_mtime
= u
->dropin_mtime
= 0;
4676 u
->load_state
= UNIT_STUB
;
4678 u
->transient
= true;
4680 unit_add_to_dbus_queue(u
);
4681 unit_add_to_gc_queue(u
);
4683 fputs("# This is a transient unit file, created programmatically via the systemd API. Do not edit.\n",
4689 static int log_kill(pid_t pid
, int sig
, void *userdata
) {
4690 _cleanup_free_
char *comm
= NULL
;
4692 (void) get_process_comm(pid
, &comm
);
4694 /* Don't log about processes marked with brackets, under the assumption that these are temporary processes
4695 only, like for example systemd's own PAM stub process. */
4696 if (comm
&& comm
[0] == '(')
4699 log_unit_notice(userdata
,
4700 "Killing process " PID_FMT
" (%s) with signal SIG%s.",
4703 signal_to_string(sig
));
4708 static int operation_to_signal(const KillContext
*c
, KillOperation k
, bool *noteworthy
) {
4713 case KILL_TERMINATE
:
4714 case KILL_TERMINATE_AND_LOG
:
4715 *noteworthy
= false;
4716 return c
->kill_signal
;
4719 *noteworthy
= false;
4720 return restart_kill_signal(c
);
4724 return c
->final_kill_signal
;
4728 return c
->watchdog_signal
;
4731 assert_not_reached("KillOperation unknown");
4735 int unit_kill_context(
4741 bool main_pid_alien
) {
4743 bool wait_for_exit
= false, send_sighup
;
4744 cg_kill_log_func_t log_func
= NULL
;
4750 /* Kill the processes belonging to this unit, in preparation for shutting the unit down.
4751 * Returns > 0 if we killed something worth waiting for, 0 otherwise. */
4753 if (c
->kill_mode
== KILL_NONE
)
4757 sig
= operation_to_signal(c
, k
, ¬eworthy
);
4759 log_func
= log_kill
;
4763 IN_SET(k
, KILL_TERMINATE
, KILL_TERMINATE_AND_LOG
) &&
4768 log_func(main_pid
, sig
, u
);
4770 r
= kill_and_sigcont(main_pid
, sig
);
4771 if (r
< 0 && r
!= -ESRCH
) {
4772 _cleanup_free_
char *comm
= NULL
;
4773 (void) get_process_comm(main_pid
, &comm
);
4775 log_unit_warning_errno(u
, r
, "Failed to kill main process " PID_FMT
" (%s), ignoring: %m", main_pid
, strna(comm
));
4777 if (!main_pid_alien
)
4778 wait_for_exit
= true;
4780 if (r
!= -ESRCH
&& send_sighup
)
4781 (void) kill(main_pid
, SIGHUP
);
4785 if (control_pid
> 0) {
4787 log_func(control_pid
, sig
, u
);
4789 r
= kill_and_sigcont(control_pid
, sig
);
4790 if (r
< 0 && r
!= -ESRCH
) {
4791 _cleanup_free_
char *comm
= NULL
;
4792 (void) get_process_comm(control_pid
, &comm
);
4794 log_unit_warning_errno(u
, r
, "Failed to kill control process " PID_FMT
" (%s), ignoring: %m", control_pid
, strna(comm
));
4796 wait_for_exit
= true;
4798 if (r
!= -ESRCH
&& send_sighup
)
4799 (void) kill(control_pid
, SIGHUP
);
4803 if (u
->cgroup_path
&&
4804 (c
->kill_mode
== KILL_CONTROL_GROUP
|| (c
->kill_mode
== KILL_MIXED
&& k
== KILL_KILL
))) {
4805 _cleanup_set_free_ Set
*pid_set
= NULL
;
4807 /* Exclude the main/control pids from being killed via the cgroup */
4808 pid_set
= unit_pid_set(main_pid
, control_pid
);
4812 r
= cg_kill_recursive(SYSTEMD_CGROUP_CONTROLLER
, u
->cgroup_path
,
4814 CGROUP_SIGCONT
|CGROUP_IGNORE_SELF
,
4818 if (!IN_SET(r
, -EAGAIN
, -ESRCH
, -ENOENT
))
4819 log_unit_warning_errno(u
, r
, "Failed to kill control group %s, ignoring: %m", u
->cgroup_path
);
4823 /* FIXME: For now, on the legacy hierarchy, we will not wait for the cgroup members to die if
4824 * we are running in a container or if this is a delegation unit, simply because cgroup
4825 * notification is unreliable in these cases. It doesn't work at all in containers, and outside
4826 * of containers it can be confused easily by left-over directories in the cgroup — which
4827 * however should not exist in non-delegated units. On the unified hierarchy that's different,
4828 * there we get proper events. Hence rely on them. */
4830 if (cg_unified_controller(SYSTEMD_CGROUP_CONTROLLER
) > 0 ||
4831 (detect_container() == 0 && !unit_cgroup_delegate(u
)))
4832 wait_for_exit
= true;
4837 pid_set
= unit_pid_set(main_pid
, control_pid
);
4841 cg_kill_recursive(SYSTEMD_CGROUP_CONTROLLER
, u
->cgroup_path
,
4850 return wait_for_exit
;
4853 int unit_require_mounts_for(Unit
*u
, const char *path
, UnitDependencyMask mask
) {
4854 _cleanup_free_
char *p
= NULL
;
4855 UnitDependencyInfo di
;
4861 /* Registers a unit for requiring a certain path and all its prefixes. We keep a hashtable of these paths in
4862 * the unit (from the path to the UnitDependencyInfo structure indicating how to the dependency came to
4863 * be). However, we build a prefix table for all possible prefixes so that new appearing mount units can easily
4864 * determine which units to make themselves a dependency of. */
4866 if (!path_is_absolute(path
))
4869 r
= hashmap_ensure_allocated(&u
->requires_mounts_for
, &path_hash_ops
);
4877 path
= path_simplify(p
, true);
4879 if (!path_is_normalized(path
))
4882 if (hashmap_contains(u
->requires_mounts_for
, path
))
4885 di
= (UnitDependencyInfo
) {
4889 r
= hashmap_put(u
->requires_mounts_for
, path
, di
.data
);
4894 char prefix
[strlen(path
) + 1];
4895 PATH_FOREACH_PREFIX_MORE(prefix
, path
) {
4898 x
= hashmap_get(u
->manager
->units_requiring_mounts_for
, prefix
);
4900 _cleanup_free_
char *q
= NULL
;
4902 r
= hashmap_ensure_allocated(&u
->manager
->units_requiring_mounts_for
, &path_hash_ops
);
4914 r
= hashmap_put(u
->manager
->units_requiring_mounts_for
, q
, x
);
4930 int unit_setup_exec_runtime(Unit
*u
) {
4938 offset
= UNIT_VTABLE(u
)->exec_runtime_offset
;
4941 /* Check if there already is an ExecRuntime for this unit? */
4942 rt
= (ExecRuntime
**) ((uint8_t*) u
+ offset
);
4946 /* Try to get it from somebody else */
4947 HASHMAP_FOREACH_KEY(v
, other
, u
->dependencies
[UNIT_JOINS_NAMESPACE_OF
], i
) {
4948 r
= exec_runtime_acquire(u
->manager
, NULL
, other
->id
, false, rt
);
4953 return exec_runtime_acquire(u
->manager
, unit_get_exec_context(u
), u
->id
, true, rt
);
4956 int unit_setup_dynamic_creds(Unit
*u
) {
4958 DynamicCreds
*dcreds
;
4963 offset
= UNIT_VTABLE(u
)->dynamic_creds_offset
;
4965 dcreds
= (DynamicCreds
*) ((uint8_t*) u
+ offset
);
4967 ec
= unit_get_exec_context(u
);
4970 if (!ec
->dynamic_user
)
4973 return dynamic_creds_acquire(dcreds
, u
->manager
, ec
->user
, ec
->group
);
4976 bool unit_type_supported(UnitType t
) {
4977 if (_unlikely_(t
< 0))
4979 if (_unlikely_(t
>= _UNIT_TYPE_MAX
))
4982 if (!unit_vtable
[t
]->supported
)
4985 return unit_vtable
[t
]->supported();
4988 void unit_warn_if_dir_nonempty(Unit
*u
, const char* where
) {
4994 r
= dir_is_empty(where
);
4995 if (r
> 0 || r
== -ENOTDIR
)
4998 log_unit_warning_errno(u
, r
, "Failed to check directory %s: %m", where
);
5002 log_struct(LOG_NOTICE
,
5003 "MESSAGE_ID=" SD_MESSAGE_OVERMOUNTING_STR
,
5005 LOG_UNIT_INVOCATION_ID(u
),
5006 LOG_UNIT_MESSAGE(u
, "Directory %s to mount over is not empty, mounting anyway.", where
),
5010 int unit_fail_if_noncanonical(Unit
*u
, const char* where
) {
5011 _cleanup_free_
char *canonical_where
= NULL
;
5017 r
= chase_symlinks(where
, NULL
, CHASE_NONEXISTENT
, &canonical_where
, NULL
);
5019 log_unit_debug_errno(u
, r
, "Failed to check %s for symlinks, ignoring: %m", where
);
5023 /* We will happily ignore a trailing slash (or any redundant slashes) */
5024 if (path_equal(where
, canonical_where
))
5027 /* No need to mention "." or "..", they would already have been rejected by unit_name_from_path() */
5029 "MESSAGE_ID=" SD_MESSAGE_OVERMOUNTING_STR
,
5031 LOG_UNIT_INVOCATION_ID(u
),
5032 LOG_UNIT_MESSAGE(u
, "Mount path %s is not canonical (contains a symlink).", where
),
5038 bool unit_is_pristine(Unit
*u
) {
5041 /* Check if the unit already exists or is already around,
5042 * in a number of different ways. Note that to cater for unit
5043 * types such as slice, we are generally fine with units that
5044 * are marked UNIT_LOADED even though nothing was actually
5045 * loaded, as those unit types don't require a file on disk. */
5047 return !(!IN_SET(u
->load_state
, UNIT_NOT_FOUND
, UNIT_LOADED
) ||
5050 !strv_isempty(u
->dropin_paths
) ||
5055 pid_t
unit_control_pid(Unit
*u
) {
5058 if (UNIT_VTABLE(u
)->control_pid
)
5059 return UNIT_VTABLE(u
)->control_pid(u
);
5064 pid_t
unit_main_pid(Unit
*u
) {
5067 if (UNIT_VTABLE(u
)->main_pid
)
5068 return UNIT_VTABLE(u
)->main_pid(u
);
5073 static void unit_unref_uid_internal(
5077 void (*_manager_unref_uid
)(Manager
*m
, uid_t uid
, bool destroy_now
)) {
5081 assert(_manager_unref_uid
);
5083 /* Generic implementation of both unit_unref_uid() and unit_unref_gid(), under the assumption that uid_t and
5084 * gid_t are actually the same time, with the same validity rules.
5086 * Drops a reference to UID/GID from a unit. */
5088 assert_cc(sizeof(uid_t
) == sizeof(gid_t
));
5089 assert_cc(UID_INVALID
== (uid_t
) GID_INVALID
);
5091 if (!uid_is_valid(*ref_uid
))
5094 _manager_unref_uid(u
->manager
, *ref_uid
, destroy_now
);
5095 *ref_uid
= UID_INVALID
;
5098 static void unit_unref_uid(Unit
*u
, bool destroy_now
) {
5099 unit_unref_uid_internal(u
, &u
->ref_uid
, destroy_now
, manager_unref_uid
);
5102 static void unit_unref_gid(Unit
*u
, bool destroy_now
) {
5103 unit_unref_uid_internal(u
, (uid_t
*) &u
->ref_gid
, destroy_now
, manager_unref_gid
);
5106 void unit_unref_uid_gid(Unit
*u
, bool destroy_now
) {
5109 unit_unref_uid(u
, destroy_now
);
5110 unit_unref_gid(u
, destroy_now
);
5113 static int unit_ref_uid_internal(
5118 int (*_manager_ref_uid
)(Manager
*m
, uid_t uid
, bool clean_ipc
)) {
5124 assert(uid_is_valid(uid
));
5125 assert(_manager_ref_uid
);
5127 /* Generic implementation of both unit_ref_uid() and unit_ref_guid(), under the assumption that uid_t and gid_t
5128 * are actually the same type, and have the same validity rules.
5130 * Adds a reference on a specific UID/GID to this unit. Each unit referencing the same UID/GID maintains a
5131 * reference so that we can destroy the UID/GID's IPC resources as soon as this is requested and the counter
5134 assert_cc(sizeof(uid_t
) == sizeof(gid_t
));
5135 assert_cc(UID_INVALID
== (uid_t
) GID_INVALID
);
5137 if (*ref_uid
== uid
)
5140 if (uid_is_valid(*ref_uid
)) /* Already set? */
5143 r
= _manager_ref_uid(u
->manager
, uid
, clean_ipc
);
5151 static int unit_ref_uid(Unit
*u
, uid_t uid
, bool clean_ipc
) {
5152 return unit_ref_uid_internal(u
, &u
->ref_uid
, uid
, clean_ipc
, manager_ref_uid
);
5155 static int unit_ref_gid(Unit
*u
, gid_t gid
, bool clean_ipc
) {
5156 return unit_ref_uid_internal(u
, (uid_t
*) &u
->ref_gid
, (uid_t
) gid
, clean_ipc
, manager_ref_gid
);
5159 static int unit_ref_uid_gid_internal(Unit
*u
, uid_t uid
, gid_t gid
, bool clean_ipc
) {
5164 /* Reference both a UID and a GID in one go. Either references both, or neither. */
5166 if (uid_is_valid(uid
)) {
5167 r
= unit_ref_uid(u
, uid
, clean_ipc
);
5172 if (gid_is_valid(gid
)) {
5173 q
= unit_ref_gid(u
, gid
, clean_ipc
);
5176 unit_unref_uid(u
, false);
5182 return r
> 0 || q
> 0;
5185 int unit_ref_uid_gid(Unit
*u
, uid_t uid
, gid_t gid
) {
5191 c
= unit_get_exec_context(u
);
5193 r
= unit_ref_uid_gid_internal(u
, uid
, gid
, c
? c
->remove_ipc
: false);
5195 return log_unit_warning_errno(u
, r
, "Couldn't add UID/GID reference to unit, proceeding without: %m");
5200 void unit_notify_user_lookup(Unit
*u
, uid_t uid
, gid_t gid
) {
5205 /* This is invoked whenever one of the forked off processes let's us know the UID/GID its user name/group names
5206 * resolved to. We keep track of which UID/GID is currently assigned in order to be able to destroy its IPC
5207 * objects when no service references the UID/GID anymore. */
5209 r
= unit_ref_uid_gid(u
, uid
, gid
);
5211 unit_add_to_dbus_queue(u
);
5214 int unit_set_invocation_id(Unit
*u
, sd_id128_t id
) {
5219 /* Set the invocation ID for this unit. If we cannot, this will not roll back, but reset the whole thing. */
5221 if (sd_id128_equal(u
->invocation_id
, id
))
5224 if (!sd_id128_is_null(u
->invocation_id
))
5225 (void) hashmap_remove_value(u
->manager
->units_by_invocation_id
, &u
->invocation_id
, u
);
5227 if (sd_id128_is_null(id
)) {
5232 r
= hashmap_ensure_allocated(&u
->manager
->units_by_invocation_id
, &id128_hash_ops
);
5236 u
->invocation_id
= id
;
5237 sd_id128_to_string(id
, u
->invocation_id_string
);
5239 r
= hashmap_put(u
->manager
->units_by_invocation_id
, &u
->invocation_id
, u
);
5246 u
->invocation_id
= SD_ID128_NULL
;
5247 u
->invocation_id_string
[0] = 0;
5251 int unit_acquire_invocation_id(Unit
*u
) {
5257 r
= sd_id128_randomize(&id
);
5259 return log_unit_error_errno(u
, r
, "Failed to generate invocation ID for unit: %m");
5261 r
= unit_set_invocation_id(u
, id
);
5263 return log_unit_error_errno(u
, r
, "Failed to set invocation ID for unit: %m");
5265 unit_add_to_dbus_queue(u
);
5269 int unit_set_exec_params(Unit
*u
, ExecParameters
*p
) {
5275 /* Copy parameters from manager */
5276 r
= manager_get_effective_environment(u
->manager
, &p
->environment
);
5280 p
->confirm_spawn
= manager_get_confirm_spawn(u
->manager
);
5281 p
->cgroup_supported
= u
->manager
->cgroup_supported
;
5282 p
->prefix
= u
->manager
->prefix
;
5283 SET_FLAG(p
->flags
, EXEC_PASS_LOG_UNIT
|EXEC_CHOWN_DIRECTORIES
, MANAGER_IS_SYSTEM(u
->manager
));
5285 /* Copy parameters from unit */
5286 p
->cgroup_path
= u
->cgroup_path
;
5287 SET_FLAG(p
->flags
, EXEC_CGROUP_DELEGATE
, unit_cgroup_delegate(u
));
5292 int unit_fork_helper_process(Unit
*u
, const char *name
, pid_t
*ret
) {
5298 /* Forks off a helper process and makes sure it is a member of the unit's cgroup. Returns == 0 in the child,
5299 * and > 0 in the parent. The pid parameter is always filled in with the child's PID. */
5301 (void) unit_realize_cgroup(u
);
5303 r
= safe_fork(name
, FORK_REOPEN_LOG
, ret
);
5307 (void) default_signals(SIGNALS_CRASH_HANDLER
, SIGNALS_IGNORE
, -1);
5308 (void) ignore_signals(SIGPIPE
, -1);
5310 (void) prctl(PR_SET_PDEATHSIG
, SIGTERM
);
5312 if (u
->cgroup_path
) {
5313 r
= cg_attach_everywhere(u
->manager
->cgroup_supported
, u
->cgroup_path
, 0, NULL
, NULL
);
5315 log_unit_error_errno(u
, r
, "Failed to join unit cgroup %s: %m", u
->cgroup_path
);
5323 int unit_fork_and_watch_rm_rf(Unit
*u
, char **paths
, pid_t
*ret_pid
) {
5330 r
= unit_fork_helper_process(u
, "(sd-rmrf)", &pid
);
5334 int ret
= EXIT_SUCCESS
;
5337 STRV_FOREACH(i
, paths
) {
5338 r
= rm_rf(*i
, REMOVE_ROOT
|REMOVE_PHYSICAL
|REMOVE_MISSING_OK
);
5340 log_error_errno(r
, "Failed to remove '%s': %m", *i
);
5348 r
= unit_watch_pid(u
, pid
, true);
5356 static void unit_update_dependency_mask(Unit
*u
, UnitDependency d
, Unit
*other
, UnitDependencyInfo di
) {
5359 assert(d
< _UNIT_DEPENDENCY_MAX
);
5362 if (di
.origin_mask
== 0 && di
.destination_mask
== 0) {
5363 /* No bit set anymore, let's drop the whole entry */
5364 assert_se(hashmap_remove(u
->dependencies
[d
], other
));
5365 log_unit_debug(u
, "%s lost dependency %s=%s", u
->id
, unit_dependency_to_string(d
), other
->id
);
5367 /* Mask was reduced, let's update the entry */
5368 assert_se(hashmap_update(u
->dependencies
[d
], other
, di
.data
) == 0);
5371 void unit_remove_dependencies(Unit
*u
, UnitDependencyMask mask
) {
5376 /* Removes all dependencies u has on other units marked for ownership by 'mask'. */
5381 for (d
= 0; d
< _UNIT_DEPENDENCY_MAX
; d
++) {
5385 UnitDependencyInfo di
;
5391 HASHMAP_FOREACH_KEY(di
.data
, other
, u
->dependencies
[d
], i
) {
5394 if ((di
.origin_mask
& ~mask
) == di
.origin_mask
)
5396 di
.origin_mask
&= ~mask
;
5397 unit_update_dependency_mask(u
, d
, other
, di
);
5399 /* We updated the dependency from our unit to the other unit now. But most dependencies
5400 * imply a reverse dependency. Hence, let's delete that one too. For that we go through
5401 * all dependency types on the other unit and delete all those which point to us and
5402 * have the right mask set. */
5404 for (q
= 0; q
< _UNIT_DEPENDENCY_MAX
; q
++) {
5405 UnitDependencyInfo dj
;
5407 dj
.data
= hashmap_get(other
->dependencies
[q
], u
);
5408 if ((dj
.destination_mask
& ~mask
) == dj
.destination_mask
)
5410 dj
.destination_mask
&= ~mask
;
5412 unit_update_dependency_mask(other
, q
, u
, dj
);
5415 unit_add_to_gc_queue(other
);
5425 static int unit_get_invocation_path(Unit
*u
, char **ret
) {
5432 if (MANAGER_IS_SYSTEM(u
->manager
))
5433 p
= strjoin("/run/systemd/units/invocation:", u
->id
);
5435 _cleanup_free_
char *user_path
= NULL
;
5436 r
= xdg_user_runtime_dir(&user_path
, "/systemd/units/invocation:");
5439 p
= strjoin(user_path
, u
->id
);
5449 static int unit_export_invocation_id(Unit
*u
) {
5450 _cleanup_free_
char *p
= NULL
;
5455 if (u
->exported_invocation_id
)
5458 if (sd_id128_is_null(u
->invocation_id
))
5461 r
= unit_get_invocation_path(u
, &p
);
5463 return log_unit_debug_errno(u
, r
, "Failed to get invocation path: %m");
5465 r
= symlink_atomic(u
->invocation_id_string
, p
);
5467 return log_unit_debug_errno(u
, r
, "Failed to create invocation ID symlink %s: %m", p
);
5469 u
->exported_invocation_id
= true;
5473 static int unit_export_log_level_max(Unit
*u
, const ExecContext
*c
) {
5481 if (u
->exported_log_level_max
)
5484 if (c
->log_level_max
< 0)
5487 assert(c
->log_level_max
<= 7);
5489 buf
[0] = '0' + c
->log_level_max
;
5492 p
= strjoina("/run/systemd/units/log-level-max:", u
->id
);
5493 r
= symlink_atomic(buf
, p
);
5495 return log_unit_debug_errno(u
, r
, "Failed to create maximum log level symlink %s: %m", p
);
5497 u
->exported_log_level_max
= true;
5501 static int unit_export_log_extra_fields(Unit
*u
, const ExecContext
*c
) {
5502 _cleanup_close_
int fd
= -1;
5503 struct iovec
*iovec
;
5511 if (u
->exported_log_extra_fields
)
5514 if (c
->n_log_extra_fields
<= 0)
5517 sizes
= newa(le64_t
, c
->n_log_extra_fields
);
5518 iovec
= newa(struct iovec
, c
->n_log_extra_fields
* 2);
5520 for (i
= 0; i
< c
->n_log_extra_fields
; i
++) {
5521 sizes
[i
] = htole64(c
->log_extra_fields
[i
].iov_len
);
5523 iovec
[i
*2] = IOVEC_MAKE(sizes
+ i
, sizeof(le64_t
));
5524 iovec
[i
*2+1] = c
->log_extra_fields
[i
];
5527 p
= strjoina("/run/systemd/units/log-extra-fields:", u
->id
);
5528 pattern
= strjoina(p
, ".XXXXXX");
5530 fd
= mkostemp_safe(pattern
);
5532 return log_unit_debug_errno(u
, fd
, "Failed to create extra fields file %s: %m", p
);
5534 n
= writev(fd
, iovec
, c
->n_log_extra_fields
*2);
5536 r
= log_unit_debug_errno(u
, errno
, "Failed to write extra fields: %m");
5540 (void) fchmod(fd
, 0644);
5542 if (rename(pattern
, p
) < 0) {
5543 r
= log_unit_debug_errno(u
, errno
, "Failed to rename extra fields file: %m");
5547 u
->exported_log_extra_fields
= true;
5551 (void) unlink(pattern
);
5555 static int unit_export_log_ratelimit_interval(Unit
*u
, const ExecContext
*c
) {
5556 _cleanup_free_
char *buf
= NULL
;
5563 if (u
->exported_log_ratelimit_interval
)
5566 if (c
->log_ratelimit_interval_usec
== 0)
5569 p
= strjoina("/run/systemd/units/log-rate-limit-interval:", u
->id
);
5571 if (asprintf(&buf
, "%" PRIu64
, c
->log_ratelimit_interval_usec
) < 0)
5574 r
= symlink_atomic(buf
, p
);
5576 return log_unit_debug_errno(u
, r
, "Failed to create log rate limit interval symlink %s: %m", p
);
5578 u
->exported_log_ratelimit_interval
= true;
5582 static int unit_export_log_ratelimit_burst(Unit
*u
, const ExecContext
*c
) {
5583 _cleanup_free_
char *buf
= NULL
;
5590 if (u
->exported_log_ratelimit_burst
)
5593 if (c
->log_ratelimit_burst
== 0)
5596 p
= strjoina("/run/systemd/units/log-rate-limit-burst:", u
->id
);
5598 if (asprintf(&buf
, "%u", c
->log_ratelimit_burst
) < 0)
5601 r
= symlink_atomic(buf
, p
);
5603 return log_unit_debug_errno(u
, r
, "Failed to create log rate limit burst symlink %s: %m", p
);
5605 u
->exported_log_ratelimit_burst
= true;
5609 void unit_export_state_files(Unit
*u
) {
5610 const ExecContext
*c
;
5617 if (MANAGER_IS_TEST_RUN(u
->manager
))
5620 /* Exports a couple of unit properties to /run/systemd/units/, so that journald can quickly query this data
5621 * from there. Ideally, journald would use IPC to query this, like everybody else, but that's hard, as long as
5622 * the IPC system itself and PID 1 also log to the journal.
5624 * Note that these files really shouldn't be considered API for anyone else, as use a runtime file system as
5625 * IPC replacement is not compatible with today's world of file system namespaces. However, this doesn't really
5626 * apply to communication between the journal and systemd, as we assume that these two daemons live in the same
5627 * namespace at least.
5629 * Note that some of the "files" exported here are actually symlinks and not regular files. Symlinks work
5630 * better for storing small bits of data, in particular as we can write them with two system calls, and read
5633 (void) unit_export_invocation_id(u
);
5635 if (!MANAGER_IS_SYSTEM(u
->manager
))
5638 c
= unit_get_exec_context(u
);
5640 (void) unit_export_log_level_max(u
, c
);
5641 (void) unit_export_log_extra_fields(u
, c
);
5642 (void) unit_export_log_ratelimit_interval(u
, c
);
5643 (void) unit_export_log_ratelimit_burst(u
, c
);
5647 void unit_unlink_state_files(Unit
*u
) {
5655 /* Undoes the effect of unit_export_state() */
5657 if (u
->exported_invocation_id
) {
5658 _cleanup_free_
char *invocation_path
= NULL
;
5659 int r
= unit_get_invocation_path(u
, &invocation_path
);
5661 (void) unlink(invocation_path
);
5662 u
->exported_invocation_id
= false;
5666 if (!MANAGER_IS_SYSTEM(u
->manager
))
5669 if (u
->exported_log_level_max
) {
5670 p
= strjoina("/run/systemd/units/log-level-max:", u
->id
);
5673 u
->exported_log_level_max
= false;
5676 if (u
->exported_log_extra_fields
) {
5677 p
= strjoina("/run/systemd/units/extra-fields:", u
->id
);
5680 u
->exported_log_extra_fields
= false;
5683 if (u
->exported_log_ratelimit_interval
) {
5684 p
= strjoina("/run/systemd/units/log-rate-limit-interval:", u
->id
);
5687 u
->exported_log_ratelimit_interval
= false;
5690 if (u
->exported_log_ratelimit_burst
) {
5691 p
= strjoina("/run/systemd/units/log-rate-limit-burst:", u
->id
);
5694 u
->exported_log_ratelimit_burst
= false;
5698 int unit_prepare_exec(Unit
*u
) {
5703 /* Load any custom firewall BPF programs here once to test if they are existing and actually loadable.
5704 * Fail here early since later errors in the call chain unit_realize_cgroup to cgroup_context_apply are ignored. */
5705 r
= bpf_firewall_load_custom(u
);
5709 /* Prepares everything so that we can fork of a process for this unit */
5711 (void) unit_realize_cgroup(u
);
5713 if (u
->reset_accounting
) {
5714 (void) unit_reset_accounting(u
);
5715 u
->reset_accounting
= false;
5718 unit_export_state_files(u
);
5720 r
= unit_setup_exec_runtime(u
);
5724 r
= unit_setup_dynamic_creds(u
);
5731 static int log_leftover(pid_t pid
, int sig
, void *userdata
) {
5732 _cleanup_free_
char *comm
= NULL
;
5734 (void) get_process_comm(pid
, &comm
);
5736 if (comm
&& comm
[0] == '(') /* Most likely our own helper process (PAM?), ignore */
5739 log_unit_warning(userdata
,
5740 "Found left-over process " PID_FMT
" (%s) in control group while starting unit. Ignoring.\n"
5741 "This usually indicates unclean termination of a previous run, or service implementation deficiencies.",
5747 int unit_warn_leftover_processes(Unit
*u
) {
5750 (void) unit_pick_cgroup_path(u
);
5752 if (!u
->cgroup_path
)
5755 return cg_kill_recursive(SYSTEMD_CGROUP_CONTROLLER
, u
->cgroup_path
, 0, 0, NULL
, log_leftover
, u
);
5758 bool unit_needs_console(Unit
*u
) {
5760 UnitActiveState state
;
5764 state
= unit_active_state(u
);
5766 if (UNIT_IS_INACTIVE_OR_FAILED(state
))
5769 if (UNIT_VTABLE(u
)->needs_console
)
5770 return UNIT_VTABLE(u
)->needs_console(u
);
5772 /* If this unit type doesn't implement this call, let's use a generic fallback implementation: */
5773 ec
= unit_get_exec_context(u
);
5777 return exec_context_may_touch_console(ec
);
5780 const char *unit_label_path(Unit
*u
) {
5783 /* Returns the file system path to use for MAC access decisions, i.e. the file to read the SELinux label off
5784 * when validating access checks. */
5786 p
= u
->source_path
?: u
->fragment_path
;
5790 /* If a unit is masked, then don't read the SELinux label of /dev/null, as that really makes no sense */
5791 if (path_equal(p
, "/dev/null"))
5797 int unit_pid_attachable(Unit
*u
, pid_t pid
, sd_bus_error
*error
) {
5802 /* Checks whether the specified PID is generally good for attaching, i.e. a valid PID, not our manager itself,
5803 * and not a kernel thread either */
5805 /* First, a simple range check */
5806 if (!pid_is_valid(pid
))
5807 return sd_bus_error_setf(error
, SD_BUS_ERROR_INVALID_ARGS
, "Process identifier " PID_FMT
" is not valid.", pid
);
5809 /* Some extra safety check */
5810 if (pid
== 1 || pid
== getpid_cached())
5811 return sd_bus_error_setf(error
, SD_BUS_ERROR_INVALID_ARGS
, "Process " PID_FMT
" is a manager process, refusing.", pid
);
5813 /* Don't even begin to bother with kernel threads */
5814 r
= is_kernel_thread(pid
);
5816 return sd_bus_error_setf(error
, SD_BUS_ERROR_UNIX_PROCESS_ID_UNKNOWN
, "Process with ID " PID_FMT
" does not exist.", pid
);
5818 return sd_bus_error_set_errnof(error
, r
, "Failed to determine whether process " PID_FMT
" is a kernel thread: %m", pid
);
5820 return sd_bus_error_setf(error
, SD_BUS_ERROR_INVALID_ARGS
, "Process " PID_FMT
" is a kernel thread, refusing.", pid
);
5825 void unit_log_success(Unit
*u
) {
5828 log_struct(LOG_INFO
,
5829 "MESSAGE_ID=" SD_MESSAGE_UNIT_SUCCESS_STR
,
5831 LOG_UNIT_INVOCATION_ID(u
),
5832 LOG_UNIT_MESSAGE(u
, "Succeeded."));
5835 void unit_log_failure(Unit
*u
, const char *result
) {
5839 log_struct(LOG_WARNING
,
5840 "MESSAGE_ID=" SD_MESSAGE_UNIT_FAILURE_RESULT_STR
,
5842 LOG_UNIT_INVOCATION_ID(u
),
5843 LOG_UNIT_MESSAGE(u
, "Failed with result '%s'.", result
),
5844 "UNIT_RESULT=%s", result
);
5847 void unit_log_skip(Unit
*u
, const char *result
) {
5851 log_struct(LOG_INFO
,
5852 "MESSAGE_ID=" SD_MESSAGE_UNIT_SKIPPED_STR
,
5854 LOG_UNIT_INVOCATION_ID(u
),
5855 LOG_UNIT_MESSAGE(u
, "Skipped due to '%s'.", result
),
5856 "UNIT_RESULT=%s", result
);
5859 void unit_log_process_exit(
5862 const char *command
,
5872 /* If this is a successful exit, let's log about the exit code on DEBUG level. If this is a failure
5873 * and the process exited on its own via exit(), then let's make this a NOTICE, under the assumption
5874 * that the service already logged the reason at a higher log level on its own. Otherwise, make it a
5878 else if (code
== CLD_EXITED
)
5881 level
= LOG_WARNING
;
5884 "MESSAGE_ID=" SD_MESSAGE_UNIT_PROCESS_EXIT_STR
,
5885 LOG_UNIT_MESSAGE(u
, "%s exited, code=%s, status=%i/%s",
5887 sigchld_code_to_string(code
), status
,
5888 strna(code
== CLD_EXITED
5889 ? exit_status_to_string(status
, EXIT_STATUS_FULL
)
5890 : signal_to_string(status
))),
5891 "EXIT_CODE=%s", sigchld_code_to_string(code
),
5892 "EXIT_STATUS=%i", status
,
5893 "COMMAND=%s", strna(command
),
5895 LOG_UNIT_INVOCATION_ID(u
));
5898 int unit_exit_status(Unit
*u
) {
5901 /* Returns the exit status to propagate for the most recent cycle of this unit. Returns a value in the range
5902 * 0…255 if there's something to propagate. EOPNOTSUPP if the concept does not apply to this unit type, ENODATA
5903 * if no data is currently known (for example because the unit hasn't deactivated yet) and EBADE if the main
5904 * service process has exited abnormally (signal/coredump). */
5906 if (!UNIT_VTABLE(u
)->exit_status
)
5909 return UNIT_VTABLE(u
)->exit_status(u
);
5912 int unit_failure_action_exit_status(Unit
*u
) {
5917 /* Returns the exit status to propagate on failure, or an error if there's nothing to propagate */
5919 if (u
->failure_action_exit_status
>= 0)
5920 return u
->failure_action_exit_status
;
5922 r
= unit_exit_status(u
);
5923 if (r
== -EBADE
) /* Exited, but not cleanly (i.e. by signal or such) */
5929 int unit_success_action_exit_status(Unit
*u
) {
5934 /* Returns the exit status to propagate on success, or an error if there's nothing to propagate */
5936 if (u
->success_action_exit_status
>= 0)
5937 return u
->success_action_exit_status
;
5939 r
= unit_exit_status(u
);
5940 if (r
== -EBADE
) /* Exited, but not cleanly (i.e. by signal or such) */
5946 int unit_test_trigger_loaded(Unit
*u
) {
5949 /* Tests whether the unit to trigger is loaded */
5951 trigger
= UNIT_TRIGGER(u
);
5953 return log_unit_error_errno(u
, SYNTHETIC_ERRNO(ENOENT
),
5954 "Refusing to start, no unit to trigger.");
5955 if (trigger
->load_state
!= UNIT_LOADED
)
5956 return log_unit_error_errno(u
, SYNTHETIC_ERRNO(ENOENT
),
5957 "Refusing to start, unit %s to trigger not loaded.", trigger
->id
);
5962 void unit_destroy_runtime_directory(Unit
*u
, const ExecContext
*context
) {
5963 if (context
->runtime_directory_preserve_mode
== EXEC_PRESERVE_NO
||
5964 (context
->runtime_directory_preserve_mode
== EXEC_PRESERVE_RESTART
&& !unit_will_restart(u
)))
5965 exec_context_destroy_runtime_directory(context
, u
->manager
->prefix
[EXEC_DIRECTORY_RUNTIME
]);
5968 int unit_clean(Unit
*u
, ExecCleanMask mask
) {
5969 UnitActiveState state
;
5973 /* Special return values:
5975 * -EOPNOTSUPP → cleaning not supported for this unit type
5976 * -EUNATCH → cleaning not defined for this resource type
5977 * -EBUSY → unit currently can't be cleaned since it's running or not properly loaded, or has
5978 * a job queued or similar
5981 if (!UNIT_VTABLE(u
)->clean
)
5987 if (u
->load_state
!= UNIT_LOADED
)
5993 state
= unit_active_state(u
);
5994 if (!IN_SET(state
, UNIT_INACTIVE
))
5997 return UNIT_VTABLE(u
)->clean(u
, mask
);
6000 int unit_can_clean(Unit
*u
, ExecCleanMask
*ret
) {
6003 if (!UNIT_VTABLE(u
)->clean
||
6004 u
->load_state
!= UNIT_LOADED
) {
6009 /* When the clean() method is set, can_clean() really should be set too */
6010 assert(UNIT_VTABLE(u
)->can_clean
);
6012 return UNIT_VTABLE(u
)->can_clean(u
, ret
);
6015 static const char* const collect_mode_table
[_COLLECT_MODE_MAX
] = {
6016 [COLLECT_INACTIVE
] = "inactive",
6017 [COLLECT_INACTIVE_OR_FAILED
] = "inactive-or-failed",
6020 DEFINE_STRING_TABLE_LOOKUP(collect_mode
, CollectMode
);