1 /* SPDX-License-Identifier: LGPL-2.1+ */
3 This file is part of systemd.
5 Copyright 2010 Lennart Poettering
7 systemd is free software; you can redistribute it and/or modify it
8 under the terms of the GNU Lesser General Public License as published by
9 the Free Software Foundation; either version 2.1 of the License, or
10 (at your option) any later version.
12 systemd is distributed in the hope that it will be useful, but
13 WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 Lesser General Public License for more details.
17 You should have received a copy of the GNU Lesser General Public License
18 along with systemd; If not, see <http://www.gnu.org/licenses/>.
28 #include "sd-messages.h"
30 #include "alloc-util.h"
31 #include "bus-common-errors.h"
33 #include "cgroup-util.h"
34 #include "dbus-unit.h"
40 #include "fileio-label.h"
41 #include "format-util.h"
43 #include "id128-util.h"
45 #include "load-dropin.h"
46 #include "load-fragment.h"
51 #include "parse-util.h"
52 #include "path-util.h"
53 #include "process-util.h"
55 #include "signal-util.h"
56 #include "sparse-endian.h"
58 #include "stat-util.h"
59 #include "stdio-util.h"
60 #include "string-table.h"
61 #include "string-util.h"
63 #include "umask-util.h"
64 #include "unit-name.h"
66 #include "user-util.h"
69 const UnitVTable
* const unit_vtable
[_UNIT_TYPE_MAX
] = {
70 [UNIT_SERVICE
] = &service_vtable
,
71 [UNIT_SOCKET
] = &socket_vtable
,
72 [UNIT_TARGET
] = &target_vtable
,
73 [UNIT_DEVICE
] = &device_vtable
,
74 [UNIT_MOUNT
] = &mount_vtable
,
75 [UNIT_AUTOMOUNT
] = &automount_vtable
,
76 [UNIT_SWAP
] = &swap_vtable
,
77 [UNIT_TIMER
] = &timer_vtable
,
78 [UNIT_PATH
] = &path_vtable
,
79 [UNIT_SLICE
] = &slice_vtable
,
80 [UNIT_SCOPE
] = &scope_vtable
,
83 static void maybe_warn_about_dependency(Unit
*u
, const char *other
, UnitDependency dependency
);
85 Unit
*unit_new(Manager
*m
, size_t size
) {
89 assert(size
>= sizeof(Unit
));
95 u
->names
= set_new(&string_hash_ops
);
100 u
->type
= _UNIT_TYPE_INVALID
;
101 u
->default_dependencies
= true;
102 u
->unit_file_state
= _UNIT_FILE_STATE_INVALID
;
103 u
->unit_file_preset
= -1;
104 u
->on_failure_job_mode
= JOB_REPLACE
;
105 u
->cgroup_inotify_wd
= -1;
106 u
->job_timeout
= USEC_INFINITY
;
107 u
->job_running_timeout
= USEC_INFINITY
;
108 u
->ref_uid
= UID_INVALID
;
109 u
->ref_gid
= GID_INVALID
;
110 u
->cpu_usage_last
= NSEC_INFINITY
;
112 u
->ip_accounting_ingress_map_fd
= -1;
113 u
->ip_accounting_egress_map_fd
= -1;
114 u
->ipv4_allow_map_fd
= -1;
115 u
->ipv6_allow_map_fd
= -1;
116 u
->ipv4_deny_map_fd
= -1;
117 u
->ipv6_deny_map_fd
= -1;
119 RATELIMIT_INIT(u
->start_limit
, m
->default_start_limit_interval
, m
->default_start_limit_burst
);
120 RATELIMIT_INIT(u
->auto_stop_ratelimit
, 10 * USEC_PER_SEC
, 16);
125 int unit_new_for_name(Manager
*m
, size_t size
, const char *name
, Unit
**ret
) {
129 u
= unit_new(m
, size
);
133 r
= unit_add_name(u
, name
);
143 bool unit_has_name(Unit
*u
, const char *name
) {
147 return set_contains(u
->names
, (char*) name
);
150 static void unit_init(Unit
*u
) {
157 assert(u
->type
>= 0);
159 cc
= unit_get_cgroup_context(u
);
161 cgroup_context_init(cc
);
163 /* Copy in the manager defaults into the cgroup
164 * context, _before_ the rest of the settings have
165 * been initialized */
167 cc
->cpu_accounting
= u
->manager
->default_cpu_accounting
;
168 cc
->io_accounting
= u
->manager
->default_io_accounting
;
169 cc
->ip_accounting
= u
->manager
->default_ip_accounting
;
170 cc
->blockio_accounting
= u
->manager
->default_blockio_accounting
;
171 cc
->memory_accounting
= u
->manager
->default_memory_accounting
;
172 cc
->tasks_accounting
= u
->manager
->default_tasks_accounting
;
173 cc
->ip_accounting
= u
->manager
->default_ip_accounting
;
175 if (u
->type
!= UNIT_SLICE
)
176 cc
->tasks_max
= u
->manager
->default_tasks_max
;
179 ec
= unit_get_exec_context(u
);
181 exec_context_init(ec
);
183 ec
->keyring_mode
= MANAGER_IS_SYSTEM(u
->manager
) ?
184 EXEC_KEYRING_PRIVATE
: EXEC_KEYRING_INHERIT
;
187 kc
= unit_get_kill_context(u
);
189 kill_context_init(kc
);
191 if (UNIT_VTABLE(u
)->init
)
192 UNIT_VTABLE(u
)->init(u
);
195 int unit_add_name(Unit
*u
, const char *text
) {
196 _cleanup_free_
char *s
= NULL
, *i
= NULL
;
203 if (unit_name_is_valid(text
, UNIT_NAME_TEMPLATE
)) {
208 r
= unit_name_replace_instance(text
, u
->instance
, &s
);
217 if (set_contains(u
->names
, s
))
219 if (hashmap_contains(u
->manager
->units
, s
))
222 if (!unit_name_is_valid(s
, UNIT_NAME_PLAIN
|UNIT_NAME_INSTANCE
))
225 t
= unit_name_to_type(s
);
229 if (u
->type
!= _UNIT_TYPE_INVALID
&& t
!= u
->type
)
232 r
= unit_name_to_instance(s
, &i
);
236 if (i
&& !unit_type_may_template(t
))
239 /* Ensure that this unit is either instanced or not instanced,
240 * but not both. Note that we do allow names with different
241 * instance names however! */
242 if (u
->type
!= _UNIT_TYPE_INVALID
&& !u
->instance
!= !i
)
245 if (!unit_type_may_alias(t
) && !set_isempty(u
->names
))
248 if (hashmap_size(u
->manager
->units
) >= MANAGER_MAX_NAMES
)
251 r
= set_put(u
->names
, s
);
256 r
= hashmap_put(u
->manager
->units
, s
, u
);
258 (void) set_remove(u
->names
, s
);
262 if (u
->type
== _UNIT_TYPE_INVALID
) {
267 LIST_PREPEND(units_by_type
, u
->manager
->units_by_type
[t
], u
);
276 unit_add_to_dbus_queue(u
);
280 int unit_choose_id(Unit
*u
, const char *name
) {
281 _cleanup_free_
char *t
= NULL
;
288 if (unit_name_is_valid(name
, UNIT_NAME_TEMPLATE
)) {
293 r
= unit_name_replace_instance(name
, u
->instance
, &t
);
300 /* Selects one of the names of this unit as the id */
301 s
= set_get(u
->names
, (char*) name
);
305 /* Determine the new instance from the new id */
306 r
= unit_name_to_instance(s
, &i
);
315 unit_add_to_dbus_queue(u
);
320 int unit_set_description(Unit
*u
, const char *description
) {
325 r
= free_and_strdup(&u
->description
, empty_to_null(description
));
329 unit_add_to_dbus_queue(u
);
334 bool unit_check_gc(Unit
*u
) {
335 UnitActiveState state
;
339 /* Checks whether the unit is ready to be unloaded for garbage collection. Returns true, when the unit shall
340 * stay around, false if there's no reason to keep it loaded. */
348 state
= unit_active_state(u
);
350 /* If the unit is inactive and failed and no job is queued for it, then release its runtime resources */
351 if (UNIT_IS_INACTIVE_OR_FAILED(state
) &&
352 UNIT_VTABLE(u
)->release_resources
)
353 UNIT_VTABLE(u
)->release_resources(u
);
361 if (sd_bus_track_count(u
->bus_track
) > 0)
364 /* But we keep the unit object around for longer when it is referenced or configured to not be gc'ed */
365 switch (u
->collect_mode
) {
367 case COLLECT_INACTIVE
:
368 if (state
!= UNIT_INACTIVE
)
373 case COLLECT_INACTIVE_OR_FAILED
:
374 if (!IN_SET(state
, UNIT_INACTIVE
, UNIT_FAILED
))
380 assert_not_reached("Unknown garbage collection mode");
383 if (UNIT_VTABLE(u
)->check_gc
)
384 if (UNIT_VTABLE(u
)->check_gc(u
))
390 void unit_add_to_load_queue(Unit
*u
) {
392 assert(u
->type
!= _UNIT_TYPE_INVALID
);
394 if (u
->load_state
!= UNIT_STUB
|| u
->in_load_queue
)
397 LIST_PREPEND(load_queue
, u
->manager
->load_queue
, u
);
398 u
->in_load_queue
= true;
401 void unit_add_to_cleanup_queue(Unit
*u
) {
404 if (u
->in_cleanup_queue
)
407 LIST_PREPEND(cleanup_queue
, u
->manager
->cleanup_queue
, u
);
408 u
->in_cleanup_queue
= true;
411 void unit_add_to_gc_queue(Unit
*u
) {
414 if (u
->in_gc_queue
|| u
->in_cleanup_queue
)
417 if (unit_check_gc(u
))
420 LIST_PREPEND(gc_queue
, u
->manager
->gc_unit_queue
, u
);
421 u
->in_gc_queue
= true;
424 void unit_add_to_dbus_queue(Unit
*u
) {
426 assert(u
->type
!= _UNIT_TYPE_INVALID
);
428 if (u
->load_state
== UNIT_STUB
|| u
->in_dbus_queue
)
431 /* Shortcut things if nobody cares */
432 if (sd_bus_track_count(u
->manager
->subscribed
) <= 0 &&
433 sd_bus_track_count(u
->bus_track
) <= 0 &&
434 set_isempty(u
->manager
->private_buses
)) {
435 u
->sent_dbus_new_signal
= true;
439 LIST_PREPEND(dbus_queue
, u
->manager
->dbus_unit_queue
, u
);
440 u
->in_dbus_queue
= true;
443 static void bidi_set_free(Unit
*u
, Hashmap
*h
) {
450 /* Frees the hashmap and makes sure we are dropped from the inverse pointers */
452 HASHMAP_FOREACH_KEY(v
, other
, h
, i
) {
455 for (d
= 0; d
< _UNIT_DEPENDENCY_MAX
; d
++)
456 hashmap_remove(other
->dependencies
[d
], u
);
458 unit_add_to_gc_queue(other
);
464 static void unit_remove_transient(Unit
*u
) {
472 if (u
->fragment_path
)
473 (void) unlink(u
->fragment_path
);
475 STRV_FOREACH(i
, u
->dropin_paths
) {
476 _cleanup_free_
char *p
= NULL
, *pp
= NULL
;
478 p
= dirname_malloc(*i
); /* Get the drop-in directory from the drop-in file */
482 pp
= dirname_malloc(p
); /* Get the config directory from the drop-in directory */
486 /* Only drop transient drop-ins */
487 if (!path_equal(u
->manager
->lookup_paths
.transient
, pp
))
495 static void unit_free_requires_mounts_for(Unit
*u
) {
499 _cleanup_free_
char *path
;
501 path
= hashmap_steal_first_key(u
->requires_mounts_for
);
505 char s
[strlen(path
) + 1];
507 PATH_FOREACH_PREFIX_MORE(s
, path
) {
511 x
= hashmap_get2(u
->manager
->units_requiring_mounts_for
, s
, (void**) &y
);
515 (void) set_remove(x
, u
);
517 if (set_isempty(x
)) {
518 (void) hashmap_remove(u
->manager
->units_requiring_mounts_for
, y
);
526 u
->requires_mounts_for
= hashmap_free(u
->requires_mounts_for
);
529 static void unit_done(Unit
*u
) {
538 if (UNIT_VTABLE(u
)->done
)
539 UNIT_VTABLE(u
)->done(u
);
541 ec
= unit_get_exec_context(u
);
543 exec_context_done(ec
);
545 cc
= unit_get_cgroup_context(u
);
547 cgroup_context_done(cc
);
550 void unit_free(Unit
*u
) {
558 if (u
->transient_file
)
559 fclose(u
->transient_file
);
561 if (!MANAGER_IS_RELOADING(u
->manager
))
562 unit_remove_transient(u
);
564 bus_unit_send_removed_signal(u
);
568 sd_bus_slot_unref(u
->match_bus_slot
);
570 sd_bus_track_unref(u
->bus_track
);
571 u
->deserialized_refs
= strv_free(u
->deserialized_refs
);
573 unit_free_requires_mounts_for(u
);
575 SET_FOREACH(t
, u
->names
, i
)
576 hashmap_remove_value(u
->manager
->units
, t
, u
);
578 if (!sd_id128_is_null(u
->invocation_id
))
579 hashmap_remove_value(u
->manager
->units_by_invocation_id
, &u
->invocation_id
, u
);
593 for (d
= 0; d
< _UNIT_DEPENDENCY_MAX
; d
++)
594 bidi_set_free(u
, u
->dependencies
[d
]);
596 if (u
->type
!= _UNIT_TYPE_INVALID
)
597 LIST_REMOVE(units_by_type
, u
->manager
->units_by_type
[u
->type
], u
);
599 if (u
->in_load_queue
)
600 LIST_REMOVE(load_queue
, u
->manager
->load_queue
, u
);
602 if (u
->in_dbus_queue
)
603 LIST_REMOVE(dbus_queue
, u
->manager
->dbus_unit_queue
, u
);
605 if (u
->in_cleanup_queue
)
606 LIST_REMOVE(cleanup_queue
, u
->manager
->cleanup_queue
, u
);
609 LIST_REMOVE(gc_queue
, u
->manager
->gc_unit_queue
, u
);
611 if (u
->in_cgroup_realize_queue
)
612 LIST_REMOVE(cgroup_realize_queue
, u
->manager
->cgroup_realize_queue
, u
);
614 if (u
->in_cgroup_empty_queue
)
615 LIST_REMOVE(cgroup_empty_queue
, u
->manager
->cgroup_empty_queue
, u
);
617 unit_release_cgroup(u
);
619 if (!MANAGER_IS_RELOADING(u
->manager
))
620 unit_unlink_state_files(u
);
622 unit_unref_uid_gid(u
, false);
624 (void) manager_update_failed_units(u
->manager
, u
, false);
625 set_remove(u
->manager
->startup_units
, u
);
627 free(u
->description
);
628 strv_free(u
->documentation
);
629 free(u
->fragment_path
);
630 free(u
->source_path
);
631 strv_free(u
->dropin_paths
);
634 free(u
->job_timeout_reboot_arg
);
636 set_free_free(u
->names
);
638 unit_unwatch_all_pids(u
);
640 condition_free_list(u
->conditions
);
641 condition_free_list(u
->asserts
);
645 unit_ref_unset(&u
->slice
);
648 unit_ref_unset(u
->refs
);
650 safe_close(u
->ip_accounting_ingress_map_fd
);
651 safe_close(u
->ip_accounting_egress_map_fd
);
653 safe_close(u
->ipv4_allow_map_fd
);
654 safe_close(u
->ipv6_allow_map_fd
);
655 safe_close(u
->ipv4_deny_map_fd
);
656 safe_close(u
->ipv6_deny_map_fd
);
658 bpf_program_unref(u
->ip_bpf_ingress
);
659 bpf_program_unref(u
->ip_bpf_egress
);
664 UnitActiveState
unit_active_state(Unit
*u
) {
667 if (u
->load_state
== UNIT_MERGED
)
668 return unit_active_state(unit_follow_merge(u
));
670 /* After a reload it might happen that a unit is not correctly
671 * loaded but still has a process around. That's why we won't
672 * shortcut failed loading to UNIT_INACTIVE_FAILED. */
674 return UNIT_VTABLE(u
)->active_state(u
);
677 const char* unit_sub_state_to_string(Unit
*u
) {
680 return UNIT_VTABLE(u
)->sub_state_to_string(u
);
683 static int set_complete_move(Set
**s
, Set
**other
) {
691 return set_move(*s
, *other
);
700 static int hashmap_complete_move(Hashmap
**s
, Hashmap
**other
) {
708 return hashmap_move(*s
, *other
);
717 static int merge_names(Unit
*u
, Unit
*other
) {
725 r
= set_complete_move(&u
->names
, &other
->names
);
729 set_free_free(other
->names
);
733 SET_FOREACH(t
, u
->names
, i
)
734 assert_se(hashmap_replace(u
->manager
->units
, t
, u
) == 0);
739 static int reserve_dependencies(Unit
*u
, Unit
*other
, UnitDependency d
) {
744 assert(d
< _UNIT_DEPENDENCY_MAX
);
747 * If u does not have this dependency set allocated, there is no need
748 * to reserve anything. In that case other's set will be transferred
749 * as a whole to u by complete_move().
751 if (!u
->dependencies
[d
])
754 /* merge_dependencies() will skip a u-on-u dependency */
755 n_reserve
= hashmap_size(other
->dependencies
[d
]) - !!hashmap_get(other
->dependencies
[d
], u
);
757 return hashmap_reserve(u
->dependencies
[d
], n_reserve
);
760 static void merge_dependencies(Unit
*u
, Unit
*other
, const char *other_id
, UnitDependency d
) {
766 /* Merges all dependencies of type 'd' of the unit 'other' into the deps of the unit 'u' */
770 assert(d
< _UNIT_DEPENDENCY_MAX
);
772 /* Fix backwards pointers. Let's iterate through all dependendent units of the other unit. */
773 HASHMAP_FOREACH_KEY(v
, back
, other
->dependencies
[d
], i
) {
776 /* Let's now iterate through the dependencies of that dependencies of the other units, looking for
777 * pointers back, and let's fix them up, to instead point to 'u'. */
779 for (k
= 0; k
< _UNIT_DEPENDENCY_MAX
; k
++) {
781 /* Do not add dependencies between u and itself. */
782 if (hashmap_remove(back
->dependencies
[k
], other
))
783 maybe_warn_about_dependency(u
, other_id
, k
);
785 UnitDependencyInfo di_u
, di_other
, di_merged
;
787 /* Let's drop this dependency between "back" and "other", and let's create it between
788 * "back" and "u" instead. Let's merge the bit masks of the dependency we are moving,
789 * and any such dependency which might already exist */
791 di_other
.data
= hashmap_get(back
->dependencies
[k
], other
);
793 continue; /* dependency isn't set, let's try the next one */
795 di_u
.data
= hashmap_get(back
->dependencies
[k
], u
);
797 di_merged
= (UnitDependencyInfo
) {
798 .origin_mask
= di_u
.origin_mask
| di_other
.origin_mask
,
799 .destination_mask
= di_u
.destination_mask
| di_other
.destination_mask
,
802 r
= hashmap_remove_and_replace(back
->dependencies
[k
], other
, u
, di_merged
.data
);
804 log_warning_errno(r
, "Failed to remove/replace: back=%s other=%s u=%s: %m", back
->id
, other_id
, u
->id
);
807 /* assert_se(hashmap_remove_and_replace(back->dependencies[k], other, u, di_merged.data) >= 0); */
813 /* Also do not move dependencies on u to itself */
814 back
= hashmap_remove(other
->dependencies
[d
], u
);
816 maybe_warn_about_dependency(u
, other_id
, d
);
818 /* The move cannot fail. The caller must have performed a reservation. */
819 assert_se(hashmap_complete_move(&u
->dependencies
[d
], &other
->dependencies
[d
]) == 0);
821 other
->dependencies
[d
] = hashmap_free(other
->dependencies
[d
]);
824 int unit_merge(Unit
*u
, Unit
*other
) {
826 const char *other_id
= NULL
;
831 assert(u
->manager
== other
->manager
);
832 assert(u
->type
!= _UNIT_TYPE_INVALID
);
834 other
= unit_follow_merge(other
);
839 if (u
->type
!= other
->type
)
842 if (!u
->instance
!= !other
->instance
)
845 if (!unit_type_may_alias(u
->type
)) /* Merging only applies to unit names that support aliases */
848 if (!IN_SET(other
->load_state
, UNIT_STUB
, UNIT_NOT_FOUND
))
857 if (!UNIT_IS_INACTIVE_OR_FAILED(unit_active_state(other
)))
861 other_id
= strdupa(other
->id
);
863 /* Make reservations to ensure merge_dependencies() won't fail */
864 for (d
= 0; d
< _UNIT_DEPENDENCY_MAX
; d
++) {
865 r
= reserve_dependencies(u
, other
, d
);
867 * We don't rollback reservations if we fail. We don't have
868 * a way to undo reservations. A reservation is not a leak.
875 r
= merge_names(u
, other
);
879 /* Redirect all references */
881 unit_ref_set(other
->refs
, u
);
883 /* Merge dependencies */
884 for (d
= 0; d
< _UNIT_DEPENDENCY_MAX
; d
++)
885 merge_dependencies(u
, other
, other_id
, d
);
887 other
->load_state
= UNIT_MERGED
;
888 other
->merged_into
= u
;
890 /* If there is still some data attached to the other node, we
891 * don't need it anymore, and can free it. */
892 if (other
->load_state
!= UNIT_STUB
)
893 if (UNIT_VTABLE(other
)->done
)
894 UNIT_VTABLE(other
)->done(other
);
896 unit_add_to_dbus_queue(u
);
897 unit_add_to_cleanup_queue(other
);
902 int unit_merge_by_name(Unit
*u
, const char *name
) {
903 _cleanup_free_
char *s
= NULL
;
910 if (unit_name_is_valid(name
, UNIT_NAME_TEMPLATE
)) {
914 r
= unit_name_replace_instance(name
, u
->instance
, &s
);
921 other
= manager_get_unit(u
->manager
, name
);
923 return unit_merge(u
, other
);
925 return unit_add_name(u
, name
);
928 Unit
* unit_follow_merge(Unit
*u
) {
931 while (u
->load_state
== UNIT_MERGED
)
932 assert_se(u
= u
->merged_into
);
937 int unit_add_exec_dependencies(Unit
*u
, ExecContext
*c
) {
938 ExecDirectoryType dt
;
945 if (c
->working_directory
) {
946 r
= unit_require_mounts_for(u
, c
->working_directory
, UNIT_DEPENDENCY_FILE
);
951 if (c
->root_directory
) {
952 r
= unit_require_mounts_for(u
, c
->root_directory
, UNIT_DEPENDENCY_FILE
);
958 r
= unit_require_mounts_for(u
, c
->root_image
, UNIT_DEPENDENCY_FILE
);
963 for (dt
= 0; dt
< _EXEC_DIRECTORY_TYPE_MAX
; dt
++) {
964 if (!u
->manager
->prefix
[dt
])
967 STRV_FOREACH(dp
, c
->directories
[dt
].paths
) {
968 _cleanup_free_
char *p
;
970 p
= strjoin(u
->manager
->prefix
[dt
], "/", *dp
);
974 r
= unit_require_mounts_for(u
, p
, UNIT_DEPENDENCY_FILE
);
980 if (!MANAGER_IS_SYSTEM(u
->manager
))
983 if (c
->private_tmp
) {
986 FOREACH_STRING(p
, "/tmp", "/var/tmp") {
987 r
= unit_require_mounts_for(u
, p
, UNIT_DEPENDENCY_FILE
);
992 r
= unit_add_dependency_by_name(u
, UNIT_AFTER
, SPECIAL_TMPFILES_SETUP_SERVICE
, NULL
, true, UNIT_DEPENDENCY_FILE
);
997 if (!IN_SET(c
->std_output
,
998 EXEC_OUTPUT_JOURNAL
, EXEC_OUTPUT_JOURNAL_AND_CONSOLE
,
999 EXEC_OUTPUT_KMSG
, EXEC_OUTPUT_KMSG_AND_CONSOLE
,
1000 EXEC_OUTPUT_SYSLOG
, EXEC_OUTPUT_SYSLOG_AND_CONSOLE
) &&
1001 !IN_SET(c
->std_error
,
1002 EXEC_OUTPUT_JOURNAL
, EXEC_OUTPUT_JOURNAL_AND_CONSOLE
,
1003 EXEC_OUTPUT_KMSG
, EXEC_OUTPUT_KMSG_AND_CONSOLE
,
1004 EXEC_OUTPUT_SYSLOG
, EXEC_OUTPUT_SYSLOG_AND_CONSOLE
))
1007 /* If syslog or kernel logging is requested, make sure our own
1008 * logging daemon is run first. */
1010 r
= unit_add_dependency_by_name(u
, UNIT_AFTER
, SPECIAL_JOURNALD_SOCKET
, NULL
, true, UNIT_DEPENDENCY_FILE
);
1017 const char *unit_description(Unit
*u
) {
1021 return u
->description
;
1023 return strna(u
->id
);
1026 static void print_unit_dependency_mask(FILE *f
, const char *kind
, UnitDependencyMask mask
, bool *space
) {
1028 UnitDependencyMask mask
;
1031 { UNIT_DEPENDENCY_FILE
, "file" },
1032 { UNIT_DEPENDENCY_IMPLICIT
, "implicit" },
1033 { UNIT_DEPENDENCY_DEFAULT
, "default" },
1034 { UNIT_DEPENDENCY_UDEV
, "udev" },
1035 { UNIT_DEPENDENCY_PATH
, "path" },
1036 { UNIT_DEPENDENCY_MOUNTINFO_IMPLICIT
, "mountinfo-implicit" },
1037 { UNIT_DEPENDENCY_MOUNTINFO_DEFAULT
, "mountinfo-default" },
1038 { UNIT_DEPENDENCY_PROC_SWAP
, "proc-swap" },
1046 for (i
= 0; i
< ELEMENTSOF(table
); i
++) {
1051 if ((mask
& table
[i
].mask
) == table
[i
].mask
) {
1059 fputs(table
[i
].name
, f
);
1061 mask
&= ~table
[i
].mask
;
1068 void unit_dump(Unit
*u
, FILE *f
, const char *prefix
) {
1072 const char *prefix2
;
1074 timestamp0
[FORMAT_TIMESTAMP_MAX
],
1075 timestamp1
[FORMAT_TIMESTAMP_MAX
],
1076 timestamp2
[FORMAT_TIMESTAMP_MAX
],
1077 timestamp3
[FORMAT_TIMESTAMP_MAX
],
1078 timestamp4
[FORMAT_TIMESTAMP_MAX
],
1079 timespan
[FORMAT_TIMESPAN_MAX
];
1081 _cleanup_set_free_ Set
*following_set
= NULL
;
1087 assert(u
->type
>= 0);
1089 prefix
= strempty(prefix
);
1090 prefix2
= strjoina(prefix
, "\t");
1094 "%s\tDescription: %s\n"
1095 "%s\tInstance: %s\n"
1096 "%s\tUnit Load State: %s\n"
1097 "%s\tUnit Active State: %s\n"
1098 "%s\tState Change Timestamp: %s\n"
1099 "%s\tInactive Exit Timestamp: %s\n"
1100 "%s\tActive Enter Timestamp: %s\n"
1101 "%s\tActive Exit Timestamp: %s\n"
1102 "%s\tInactive Enter Timestamp: %s\n"
1103 "%s\tGC Check Good: %s\n"
1104 "%s\tNeed Daemon Reload: %s\n"
1105 "%s\tTransient: %s\n"
1106 "%s\tPerpetual: %s\n"
1107 "%s\tGarbage Collection Mode: %s\n"
1110 "%s\tCGroup realized: %s\n",
1112 prefix
, unit_description(u
),
1113 prefix
, strna(u
->instance
),
1114 prefix
, unit_load_state_to_string(u
->load_state
),
1115 prefix
, unit_active_state_to_string(unit_active_state(u
)),
1116 prefix
, strna(format_timestamp(timestamp0
, sizeof(timestamp0
), u
->state_change_timestamp
.realtime
)),
1117 prefix
, strna(format_timestamp(timestamp1
, sizeof(timestamp1
), u
->inactive_exit_timestamp
.realtime
)),
1118 prefix
, strna(format_timestamp(timestamp2
, sizeof(timestamp2
), u
->active_enter_timestamp
.realtime
)),
1119 prefix
, strna(format_timestamp(timestamp3
, sizeof(timestamp3
), u
->active_exit_timestamp
.realtime
)),
1120 prefix
, strna(format_timestamp(timestamp4
, sizeof(timestamp4
), u
->inactive_enter_timestamp
.realtime
)),
1121 prefix
, yes_no(unit_check_gc(u
)),
1122 prefix
, yes_no(unit_need_daemon_reload(u
)),
1123 prefix
, yes_no(u
->transient
),
1124 prefix
, yes_no(u
->perpetual
),
1125 prefix
, collect_mode_to_string(u
->collect_mode
),
1126 prefix
, strna(unit_slice_name(u
)),
1127 prefix
, strna(u
->cgroup_path
),
1128 prefix
, yes_no(u
->cgroup_realized
));
1130 if (u
->cgroup_realized_mask
!= 0) {
1131 _cleanup_free_
char *s
= NULL
;
1132 (void) cg_mask_to_string(u
->cgroup_realized_mask
, &s
);
1133 fprintf(f
, "%s\tCGroup realized mask: %s\n", prefix
, strnull(s
));
1135 if (u
->cgroup_enabled_mask
!= 0) {
1136 _cleanup_free_
char *s
= NULL
;
1137 (void) cg_mask_to_string(u
->cgroup_enabled_mask
, &s
);
1138 fprintf(f
, "%s\tCGroup enabled mask: %s\n", prefix
, strnull(s
));
1140 m
= unit_get_own_mask(u
);
1142 _cleanup_free_
char *s
= NULL
;
1143 (void) cg_mask_to_string(m
, &s
);
1144 fprintf(f
, "%s\tCGroup own mask: %s\n", prefix
, strnull(s
));
1146 m
= unit_get_members_mask(u
);
1148 _cleanup_free_
char *s
= NULL
;
1149 (void) cg_mask_to_string(m
, &s
);
1150 fprintf(f
, "%s\tCGroup members mask: %s\n", prefix
, strnull(s
));
1153 SET_FOREACH(t
, u
->names
, i
)
1154 fprintf(f
, "%s\tName: %s\n", prefix
, t
);
1156 if (!sd_id128_is_null(u
->invocation_id
))
1157 fprintf(f
, "%s\tInvocation ID: " SD_ID128_FORMAT_STR
"\n",
1158 prefix
, SD_ID128_FORMAT_VAL(u
->invocation_id
));
1160 STRV_FOREACH(j
, u
->documentation
)
1161 fprintf(f
, "%s\tDocumentation: %s\n", prefix
, *j
);
1163 following
= unit_following(u
);
1165 fprintf(f
, "%s\tFollowing: %s\n", prefix
, following
->id
);
1167 r
= unit_following_set(u
, &following_set
);
1171 SET_FOREACH(other
, following_set
, i
)
1172 fprintf(f
, "%s\tFollowing Set Member: %s\n", prefix
, other
->id
);
1175 if (u
->fragment_path
)
1176 fprintf(f
, "%s\tFragment Path: %s\n", prefix
, u
->fragment_path
);
1179 fprintf(f
, "%s\tSource Path: %s\n", prefix
, u
->source_path
);
1181 STRV_FOREACH(j
, u
->dropin_paths
)
1182 fprintf(f
, "%s\tDropIn Path: %s\n", prefix
, *j
);
1184 if (u
->job_timeout
!= USEC_INFINITY
)
1185 fprintf(f
, "%s\tJob Timeout: %s\n", prefix
, format_timespan(timespan
, sizeof(timespan
), u
->job_timeout
, 0));
1187 if (u
->job_timeout_action
!= EMERGENCY_ACTION_NONE
)
1188 fprintf(f
, "%s\tJob Timeout Action: %s\n", prefix
, emergency_action_to_string(u
->job_timeout_action
));
1190 if (u
->job_timeout_reboot_arg
)
1191 fprintf(f
, "%s\tJob Timeout Reboot Argument: %s\n", prefix
, u
->job_timeout_reboot_arg
);
1193 condition_dump_list(u
->conditions
, f
, prefix
, condition_type_to_string
);
1194 condition_dump_list(u
->asserts
, f
, prefix
, assert_type_to_string
);
1196 if (dual_timestamp_is_set(&u
->condition_timestamp
))
1198 "%s\tCondition Timestamp: %s\n"
1199 "%s\tCondition Result: %s\n",
1200 prefix
, strna(format_timestamp(timestamp1
, sizeof(timestamp1
), u
->condition_timestamp
.realtime
)),
1201 prefix
, yes_no(u
->condition_result
));
1203 if (dual_timestamp_is_set(&u
->assert_timestamp
))
1205 "%s\tAssert Timestamp: %s\n"
1206 "%s\tAssert Result: %s\n",
1207 prefix
, strna(format_timestamp(timestamp1
, sizeof(timestamp1
), u
->assert_timestamp
.realtime
)),
1208 prefix
, yes_no(u
->assert_result
));
1210 for (d
= 0; d
< _UNIT_DEPENDENCY_MAX
; d
++) {
1211 UnitDependencyInfo di
;
1214 HASHMAP_FOREACH_KEY(di
.data
, other
, u
->dependencies
[d
], i
) {
1217 fprintf(f
, "%s\t%s: %s (", prefix
, unit_dependency_to_string(d
), other
->id
);
1219 print_unit_dependency_mask(f
, "origin", di
.origin_mask
, &space
);
1220 print_unit_dependency_mask(f
, "destination", di
.destination_mask
, &space
);
1226 if (!hashmap_isempty(u
->requires_mounts_for
)) {
1227 UnitDependencyInfo di
;
1230 HASHMAP_FOREACH_KEY(di
.data
, path
, u
->requires_mounts_for
, i
) {
1233 fprintf(f
, "%s\tRequiresMountsFor: %s (", prefix
, path
);
1235 print_unit_dependency_mask(f
, "origin", di
.origin_mask
, &space
);
1236 print_unit_dependency_mask(f
, "destination", di
.destination_mask
, &space
);
1242 if (u
->load_state
== UNIT_LOADED
) {
1245 "%s\tStopWhenUnneeded: %s\n"
1246 "%s\tRefuseManualStart: %s\n"
1247 "%s\tRefuseManualStop: %s\n"
1248 "%s\tDefaultDependencies: %s\n"
1249 "%s\tOnFailureJobMode: %s\n"
1250 "%s\tIgnoreOnIsolate: %s\n",
1251 prefix
, yes_no(u
->stop_when_unneeded
),
1252 prefix
, yes_no(u
->refuse_manual_start
),
1253 prefix
, yes_no(u
->refuse_manual_stop
),
1254 prefix
, yes_no(u
->default_dependencies
),
1255 prefix
, job_mode_to_string(u
->on_failure_job_mode
),
1256 prefix
, yes_no(u
->ignore_on_isolate
));
1258 if (UNIT_VTABLE(u
)->dump
)
1259 UNIT_VTABLE(u
)->dump(u
, f
, prefix2
);
1261 } else if (u
->load_state
== UNIT_MERGED
)
1263 "%s\tMerged into: %s\n",
1264 prefix
, u
->merged_into
->id
);
1265 else if (u
->load_state
== UNIT_ERROR
)
1266 fprintf(f
, "%s\tLoad Error Code: %s\n", prefix
, strerror(-u
->load_error
));
1268 for (n
= sd_bus_track_first(u
->bus_track
); n
; n
= sd_bus_track_next(u
->bus_track
))
1269 fprintf(f
, "%s\tBus Ref: %s\n", prefix
, n
);
1272 job_dump(u
->job
, f
, prefix2
);
1275 job_dump(u
->nop_job
, f
, prefix2
);
1278 /* Common implementation for multiple backends */
1279 int unit_load_fragment_and_dropin(Unit
*u
) {
1284 /* Load a .{service,socket,...} file */
1285 r
= unit_load_fragment(u
);
1289 if (u
->load_state
== UNIT_STUB
)
1292 /* Load drop-in directory data. If u is an alias, we might be reloading the
1293 * target unit needlessly. But we cannot be sure which drops-ins have already
1294 * been loaded and which not, at least without doing complicated book-keeping,
1295 * so let's always reread all drop-ins. */
1296 return unit_load_dropin(unit_follow_merge(u
));
1299 /* Common implementation for multiple backends */
1300 int unit_load_fragment_and_dropin_optional(Unit
*u
) {
1305 /* Same as unit_load_fragment_and_dropin(), but whether
1306 * something can be loaded or not doesn't matter. */
1308 /* Load a .service file */
1309 r
= unit_load_fragment(u
);
1313 if (u
->load_state
== UNIT_STUB
)
1314 u
->load_state
= UNIT_LOADED
;
1316 /* Load drop-in directory data */
1317 return unit_load_dropin(unit_follow_merge(u
));
1320 int unit_add_default_target_dependency(Unit
*u
, Unit
*target
) {
1324 if (target
->type
!= UNIT_TARGET
)
1327 /* Only add the dependency if both units are loaded, so that
1328 * that loop check below is reliable */
1329 if (u
->load_state
!= UNIT_LOADED
||
1330 target
->load_state
!= UNIT_LOADED
)
1333 /* If either side wants no automatic dependencies, then let's
1335 if (!u
->default_dependencies
||
1336 !target
->default_dependencies
)
1339 /* Don't create loops */
1340 if (hashmap_get(target
->dependencies
[UNIT_BEFORE
], u
))
1343 return unit_add_dependency(target
, UNIT_AFTER
, u
, true, UNIT_DEPENDENCY_DEFAULT
);
1346 static int unit_add_target_dependencies(Unit
*u
) {
1348 static const UnitDependency deps
[] = {
1360 for (k
= 0; k
< ELEMENTSOF(deps
); k
++) {
1365 HASHMAP_FOREACH_KEY(v
, target
, u
->dependencies
[deps
[k
]], i
) {
1366 r
= unit_add_default_target_dependency(u
, target
);
1375 static int unit_add_slice_dependencies(Unit
*u
) {
1376 UnitDependencyMask mask
;
1379 if (!UNIT_HAS_CGROUP_CONTEXT(u
))
1382 /* Slice units are implicitly ordered against their parent slices (as this relationship is encoded in the
1383 name), while all other units are ordered based on configuration (as in their case Slice= configures the
1385 mask
= u
->type
== UNIT_SLICE
? UNIT_DEPENDENCY_IMPLICIT
: UNIT_DEPENDENCY_FILE
;
1387 if (UNIT_ISSET(u
->slice
))
1388 return unit_add_two_dependencies(u
, UNIT_AFTER
, UNIT_REQUIRES
, UNIT_DEREF(u
->slice
), true, mask
);
1390 if (unit_has_name(u
, SPECIAL_ROOT_SLICE
))
1393 return unit_add_two_dependencies_by_name(u
, UNIT_AFTER
, UNIT_REQUIRES
, SPECIAL_ROOT_SLICE
, NULL
, true, mask
);
1396 static int unit_add_mount_dependencies(Unit
*u
) {
1397 UnitDependencyInfo di
;
1404 HASHMAP_FOREACH_KEY(di
.data
, path
, u
->requires_mounts_for
, i
) {
1405 char prefix
[strlen(path
) + 1];
1407 PATH_FOREACH_PREFIX_MORE(prefix
, path
) {
1408 _cleanup_free_
char *p
= NULL
;
1411 r
= unit_name_from_path(prefix
, ".mount", &p
);
1415 m
= manager_get_unit(u
->manager
, p
);
1417 /* Make sure to load the mount unit if
1418 * it exists. If so the dependencies
1419 * on this unit will be added later
1420 * during the loading of the mount
1422 (void) manager_load_unit_prepare(u
->manager
, p
, NULL
, NULL
, &m
);
1428 if (m
->load_state
!= UNIT_LOADED
)
1431 r
= unit_add_dependency(u
, UNIT_AFTER
, m
, true, di
.origin_mask
);
1435 if (m
->fragment_path
) {
1436 r
= unit_add_dependency(u
, UNIT_REQUIRES
, m
, true, di
.origin_mask
);
1446 static int unit_add_startup_units(Unit
*u
) {
1450 c
= unit_get_cgroup_context(u
);
1454 if (c
->startup_cpu_shares
== CGROUP_CPU_SHARES_INVALID
&&
1455 c
->startup_io_weight
== CGROUP_WEIGHT_INVALID
&&
1456 c
->startup_blockio_weight
== CGROUP_BLKIO_WEIGHT_INVALID
)
1459 r
= set_ensure_allocated(&u
->manager
->startup_units
, NULL
);
1463 return set_put(u
->manager
->startup_units
, u
);
1466 int unit_load(Unit
*u
) {
1471 if (u
->in_load_queue
) {
1472 LIST_REMOVE(load_queue
, u
->manager
->load_queue
, u
);
1473 u
->in_load_queue
= false;
1476 if (u
->type
== _UNIT_TYPE_INVALID
)
1479 if (u
->load_state
!= UNIT_STUB
)
1482 if (u
->transient_file
) {
1483 r
= fflush_and_check(u
->transient_file
);
1487 fclose(u
->transient_file
);
1488 u
->transient_file
= NULL
;
1490 u
->fragment_mtime
= now(CLOCK_REALTIME
);
1493 if (UNIT_VTABLE(u
)->load
) {
1494 r
= UNIT_VTABLE(u
)->load(u
);
1499 if (u
->load_state
== UNIT_STUB
) {
1504 if (u
->load_state
== UNIT_LOADED
) {
1506 r
= unit_add_target_dependencies(u
);
1510 r
= unit_add_slice_dependencies(u
);
1514 r
= unit_add_mount_dependencies(u
);
1518 r
= unit_add_startup_units(u
);
1522 if (u
->on_failure_job_mode
== JOB_ISOLATE
&& hashmap_size(u
->dependencies
[UNIT_ON_FAILURE
]) > 1) {
1523 log_unit_error(u
, "More than one OnFailure= dependencies specified but OnFailureJobMode=isolate set. Refusing.");
1528 if (u
->job_running_timeout
!= USEC_INFINITY
&& u
->job_running_timeout
> u
->job_timeout
)
1529 log_unit_warning(u
, "JobRunningTimeoutSec= is greater than JobTimeoutSec=, it has no effect.");
1531 unit_update_cgroup_members_masks(u
);
1534 assert((u
->load_state
!= UNIT_MERGED
) == !u
->merged_into
);
1536 unit_add_to_dbus_queue(unit_follow_merge(u
));
1537 unit_add_to_gc_queue(u
);
1542 u
->load_state
= u
->load_state
== UNIT_STUB
? UNIT_NOT_FOUND
: UNIT_ERROR
;
1544 unit_add_to_dbus_queue(u
);
1545 unit_add_to_gc_queue(u
);
1547 log_unit_debug_errno(u
, r
, "Failed to load configuration: %m");
1552 static bool unit_condition_test_list(Unit
*u
, Condition
*first
, const char *(*to_string
)(ConditionType t
)) {
1559 /* If the condition list is empty, then it is true */
1563 /* Otherwise, if all of the non-trigger conditions apply and
1564 * if any of the trigger conditions apply (unless there are
1565 * none) we return true */
1566 LIST_FOREACH(conditions
, c
, first
) {
1569 r
= condition_test(c
);
1572 "Couldn't determine result for %s=%s%s%s, assuming failed: %m",
1574 c
->trigger
? "|" : "",
1575 c
->negate
? "!" : "",
1581 c
->trigger
? "|" : "",
1582 c
->negate
? "!" : "",
1584 condition_result_to_string(c
->result
));
1586 if (!c
->trigger
&& r
<= 0)
1589 if (c
->trigger
&& triggered
<= 0)
1593 return triggered
!= 0;
1596 static bool unit_condition_test(Unit
*u
) {
1599 dual_timestamp_get(&u
->condition_timestamp
);
1600 u
->condition_result
= unit_condition_test_list(u
, u
->conditions
, condition_type_to_string
);
1602 return u
->condition_result
;
1605 static bool unit_assert_test(Unit
*u
) {
1608 dual_timestamp_get(&u
->assert_timestamp
);
1609 u
->assert_result
= unit_condition_test_list(u
, u
->asserts
, assert_type_to_string
);
1611 return u
->assert_result
;
1614 void unit_status_printf(Unit
*u
, const char *status
, const char *unit_status_msg_format
) {
1615 DISABLE_WARNING_FORMAT_NONLITERAL
;
1616 manager_status_printf(u
->manager
, STATUS_TYPE_NORMAL
, status
, unit_status_msg_format
, unit_description(u
));
1620 _pure_
static const char* unit_get_status_message_format(Unit
*u
, JobType t
) {
1622 const UnitStatusMessageFormats
*format_table
;
1625 assert(IN_SET(t
, JOB_START
, JOB_STOP
, JOB_RELOAD
));
1627 if (t
!= JOB_RELOAD
) {
1628 format_table
= &UNIT_VTABLE(u
)->status_message_formats
;
1630 format
= format_table
->starting_stopping
[t
== JOB_STOP
];
1636 /* Return generic strings */
1638 return "Starting %s.";
1639 else if (t
== JOB_STOP
)
1640 return "Stopping %s.";
1642 return "Reloading %s.";
1645 static void unit_status_print_starting_stopping(Unit
*u
, JobType t
) {
1650 /* Reload status messages have traditionally not been printed to console. */
1651 if (!IN_SET(t
, JOB_START
, JOB_STOP
))
1654 format
= unit_get_status_message_format(u
, t
);
1656 DISABLE_WARNING_FORMAT_NONLITERAL
;
1657 unit_status_printf(u
, "", format
);
1661 static void unit_status_log_starting_stopping_reloading(Unit
*u
, JobType t
) {
1662 const char *format
, *mid
;
1667 if (!IN_SET(t
, JOB_START
, JOB_STOP
, JOB_RELOAD
))
1670 if (log_on_console())
1673 /* We log status messages for all units and all operations. */
1675 format
= unit_get_status_message_format(u
, t
);
1677 DISABLE_WARNING_FORMAT_NONLITERAL
;
1678 snprintf(buf
, sizeof buf
, format
, unit_description(u
));
1681 mid
= t
== JOB_START
? "MESSAGE_ID=" SD_MESSAGE_UNIT_STARTING_STR
:
1682 t
== JOB_STOP
? "MESSAGE_ID=" SD_MESSAGE_UNIT_STOPPING_STR
:
1683 "MESSAGE_ID=" SD_MESSAGE_UNIT_RELOADING_STR
;
1685 /* Note that we deliberately use LOG_MESSAGE() instead of
1686 * LOG_UNIT_MESSAGE() here, since this is supposed to mimic
1687 * closely what is written to screen using the status output,
1688 * which is supposed the highest level, friendliest output
1689 * possible, which means we should avoid the low-level unit
1691 log_struct(LOG_INFO
,
1692 LOG_MESSAGE("%s", buf
),
1694 LOG_UNIT_INVOCATION_ID(u
),
1699 void unit_status_emit_starting_stopping_reloading(Unit
*u
, JobType t
) {
1702 assert(t
< _JOB_TYPE_MAX
);
1704 unit_status_log_starting_stopping_reloading(u
, t
);
1705 unit_status_print_starting_stopping(u
, t
);
1708 int unit_start_limit_test(Unit
*u
) {
1711 if (ratelimit_test(&u
->start_limit
)) {
1712 u
->start_limit_hit
= false;
1716 log_unit_warning(u
, "Start request repeated too quickly.");
1717 u
->start_limit_hit
= true;
1719 return emergency_action(u
->manager
, u
->start_limit_action
, u
->reboot_arg
, "unit failed");
1722 bool unit_shall_confirm_spawn(Unit
*u
) {
1725 if (manager_is_confirm_spawn_disabled(u
->manager
))
1728 /* For some reasons units remaining in the same process group
1729 * as PID 1 fail to acquire the console even if it's not used
1730 * by any process. So skip the confirmation question for them. */
1731 return !unit_get_exec_context(u
)->same_pgrp
;
1734 static bool unit_verify_deps(Unit
*u
) {
1741 /* Checks whether all BindsTo= dependencies of this unit are fulfilled — if they are also combined with
1742 * After=. We do not check Requires= or Requisite= here as they only should have an effect on the job
1743 * processing, but do not have any effect afterwards. We don't check BindsTo= dependencies that are not used in
1744 * conjunction with After= as for them any such check would make things entirely racy. */
1746 HASHMAP_FOREACH_KEY(v
, other
, u
->dependencies
[UNIT_BINDS_TO
], j
) {
1748 if (!hashmap_contains(u
->dependencies
[UNIT_AFTER
], other
))
1751 if (!UNIT_IS_ACTIVE_OR_RELOADING(unit_active_state(other
))) {
1752 log_unit_notice(u
, "Bound to unit %s, but unit isn't active.", other
->id
);
1761 * -EBADR: This unit type does not support starting.
1762 * -EALREADY: Unit is already started.
1763 * -EAGAIN: An operation is already in progress. Retry later.
1764 * -ECANCELED: Too many requests for now.
1765 * -EPROTO: Assert failed
1766 * -EINVAL: Unit not loaded
1767 * -EOPNOTSUPP: Unit type not supported
1768 * -ENOLINK: The necessary dependencies are not fulfilled.
1770 int unit_start(Unit
*u
) {
1771 UnitActiveState state
;
1776 /* If this is already started, then this will succeed. Note
1777 * that this will even succeed if this unit is not startable
1778 * by the user. This is relied on to detect when we need to
1779 * wait for units and when waiting is finished. */
1780 state
= unit_active_state(u
);
1781 if (UNIT_IS_ACTIVE_OR_RELOADING(state
))
1784 /* Units that aren't loaded cannot be started */
1785 if (u
->load_state
!= UNIT_LOADED
)
1788 /* If the conditions failed, don't do anything at all. If we
1789 * already are activating this call might still be useful to
1790 * speed up activation in case there is some hold-off time,
1791 * but we don't want to recheck the condition in that case. */
1792 if (state
!= UNIT_ACTIVATING
&&
1793 !unit_condition_test(u
)) {
1794 log_unit_debug(u
, "Starting requested but condition failed. Not starting unit.");
1798 /* If the asserts failed, fail the entire job */
1799 if (state
!= UNIT_ACTIVATING
&&
1800 !unit_assert_test(u
)) {
1801 log_unit_notice(u
, "Starting requested but asserts failed.");
1805 /* Units of types that aren't supported cannot be
1806 * started. Note that we do this test only after the condition
1807 * checks, so that we rather return condition check errors
1808 * (which are usually not considered a true failure) than "not
1809 * supported" errors (which are considered a failure).
1811 if (!unit_supported(u
))
1814 /* Let's make sure that the deps really are in order before we start this. Normally the job engine should have
1815 * taken care of this already, but let's check this here again. After all, our dependencies might not be in
1816 * effect anymore, due to a reload or due to a failed condition. */
1817 if (!unit_verify_deps(u
))
1820 /* Forward to the main object, if we aren't it. */
1821 following
= unit_following(u
);
1823 log_unit_debug(u
, "Redirecting start request from %s to %s.", u
->id
, following
->id
);
1824 return unit_start(following
);
1827 /* If it is stopped, but we cannot start it, then fail */
1828 if (!UNIT_VTABLE(u
)->start
)
1831 /* We don't suppress calls to ->start() here when we are
1832 * already starting, to allow this request to be used as a
1833 * "hurry up" call, for example when the unit is in some "auto
1834 * restart" state where it waits for a holdoff timer to elapse
1835 * before it will start again. */
1837 unit_add_to_dbus_queue(u
);
1839 return UNIT_VTABLE(u
)->start(u
);
1842 bool unit_can_start(Unit
*u
) {
1845 if (u
->load_state
!= UNIT_LOADED
)
1848 if (!unit_supported(u
))
1851 return !!UNIT_VTABLE(u
)->start
;
1854 bool unit_can_isolate(Unit
*u
) {
1857 return unit_can_start(u
) &&
1862 * -EBADR: This unit type does not support stopping.
1863 * -EALREADY: Unit is already stopped.
1864 * -EAGAIN: An operation is already in progress. Retry later.
1866 int unit_stop(Unit
*u
) {
1867 UnitActiveState state
;
1872 state
= unit_active_state(u
);
1873 if (UNIT_IS_INACTIVE_OR_FAILED(state
))
1876 following
= unit_following(u
);
1878 log_unit_debug(u
, "Redirecting stop request from %s to %s.", u
->id
, following
->id
);
1879 return unit_stop(following
);
1882 if (!UNIT_VTABLE(u
)->stop
)
1885 unit_add_to_dbus_queue(u
);
1887 return UNIT_VTABLE(u
)->stop(u
);
1890 bool unit_can_stop(Unit
*u
) {
1893 if (!unit_supported(u
))
1899 return !!UNIT_VTABLE(u
)->stop
;
1903 * -EBADR: This unit type does not support reloading.
1904 * -ENOEXEC: Unit is not started.
1905 * -EAGAIN: An operation is already in progress. Retry later.
1907 int unit_reload(Unit
*u
) {
1908 UnitActiveState state
;
1913 if (u
->load_state
!= UNIT_LOADED
)
1916 if (!unit_can_reload(u
))
1919 state
= unit_active_state(u
);
1920 if (state
== UNIT_RELOADING
)
1923 if (state
!= UNIT_ACTIVE
) {
1924 log_unit_warning(u
, "Unit cannot be reloaded because it is inactive.");
1928 following
= unit_following(u
);
1930 log_unit_debug(u
, "Redirecting reload request from %s to %s.", u
->id
, following
->id
);
1931 return unit_reload(following
);
1934 unit_add_to_dbus_queue(u
);
1936 if (!UNIT_VTABLE(u
)->reload
) {
1937 /* Unit doesn't have a reload function, but we need to propagate the reload anyway */
1938 unit_notify(u
, unit_active_state(u
), unit_active_state(u
), true);
1942 return UNIT_VTABLE(u
)->reload(u
);
1945 bool unit_can_reload(Unit
*u
) {
1948 if (UNIT_VTABLE(u
)->can_reload
)
1949 return UNIT_VTABLE(u
)->can_reload(u
);
1951 if (!hashmap_isempty(u
->dependencies
[UNIT_PROPAGATES_RELOAD_TO
]))
1954 return UNIT_VTABLE(u
)->reload
;
1957 static void unit_check_unneeded(Unit
*u
) {
1959 _cleanup_(sd_bus_error_free
) sd_bus_error error
= SD_BUS_ERROR_NULL
;
1961 static const UnitDependency needed_dependencies
[] = {
1973 /* If this service shall be shut down when unneeded then do
1976 if (!u
->stop_when_unneeded
)
1979 if (!UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(u
)))
1982 for (j
= 0; j
< ELEMENTSOF(needed_dependencies
); j
++) {
1987 HASHMAP_FOREACH_KEY(v
, other
, u
->dependencies
[needed_dependencies
[j
]], i
)
1988 if (unit_active_or_pending(other
))
1992 /* If stopping a unit fails continuously we might enter a stop
1993 * loop here, hence stop acting on the service being
1994 * unnecessary after a while. */
1995 if (!ratelimit_test(&u
->auto_stop_ratelimit
)) {
1996 log_unit_warning(u
, "Unit not needed anymore, but not stopping since we tried this too often recently.");
2000 log_unit_info(u
, "Unit not needed anymore. Stopping.");
2002 /* Ok, nobody needs us anymore. Sniff. Then let's commit suicide */
2003 r
= manager_add_job(u
->manager
, JOB_STOP
, u
, JOB_FAIL
, &error
, NULL
);
2005 log_unit_warning_errno(u
, r
, "Failed to enqueue stop job, ignoring: %s", bus_error_message(&error
, r
));
2008 static void unit_check_binds_to(Unit
*u
) {
2009 _cleanup_(sd_bus_error_free
) sd_bus_error error
= SD_BUS_ERROR_NULL
;
2021 if (unit_active_state(u
) != UNIT_ACTIVE
)
2024 HASHMAP_FOREACH_KEY(v
, other
, u
->dependencies
[UNIT_BINDS_TO
], i
) {
2028 if (!other
->coldplugged
)
2029 /* We might yet create a job for the other unit… */
2032 if (!UNIT_IS_INACTIVE_OR_FAILED(unit_active_state(other
)))
2042 /* If stopping a unit fails continuously we might enter a stop
2043 * loop here, hence stop acting on the service being
2044 * unnecessary after a while. */
2045 if (!ratelimit_test(&u
->auto_stop_ratelimit
)) {
2046 log_unit_warning(u
, "Unit is bound to inactive unit %s, but not stopping since we tried this too often recently.", other
->id
);
2051 log_unit_info(u
, "Unit is bound to inactive unit %s. Stopping, too.", other
->id
);
2053 /* A unit we need to run is gone. Sniff. Let's stop this. */
2054 r
= manager_add_job(u
->manager
, JOB_STOP
, u
, JOB_FAIL
, &error
, NULL
);
2056 log_unit_warning_errno(u
, r
, "Failed to enqueue stop job, ignoring: %s", bus_error_message(&error
, r
));
2059 static void retroactively_start_dependencies(Unit
*u
) {
2065 assert(UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(u
)));
2067 HASHMAP_FOREACH_KEY(v
, other
, u
->dependencies
[UNIT_REQUIRES
], 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
);
2072 HASHMAP_FOREACH_KEY(v
, other
, u
->dependencies
[UNIT_BINDS_TO
], 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_REPLACE
, NULL
, NULL
);
2077 HASHMAP_FOREACH_KEY(v
, other
, u
->dependencies
[UNIT_WANTS
], i
)
2078 if (!hashmap_get(u
->dependencies
[UNIT_AFTER
], other
) &&
2079 !UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(other
)))
2080 manager_add_job(u
->manager
, JOB_START
, other
, JOB_FAIL
, NULL
, NULL
);
2082 HASHMAP_FOREACH_KEY(v
, other
, u
->dependencies
[UNIT_CONFLICTS
], i
)
2083 if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other
)))
2084 manager_add_job(u
->manager
, JOB_STOP
, other
, JOB_REPLACE
, NULL
, NULL
);
2086 HASHMAP_FOREACH_KEY(v
, other
, u
->dependencies
[UNIT_CONFLICTED_BY
], i
)
2087 if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other
)))
2088 manager_add_job(u
->manager
, JOB_STOP
, other
, JOB_REPLACE
, NULL
, NULL
);
2091 static void retroactively_stop_dependencies(Unit
*u
) {
2097 assert(UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(u
)));
2099 /* Pull down units which are bound to us recursively if enabled */
2100 HASHMAP_FOREACH_KEY(v
, other
, u
->dependencies
[UNIT_BOUND_BY
], i
)
2101 if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other
)))
2102 manager_add_job(u
->manager
, JOB_STOP
, other
, JOB_REPLACE
, NULL
, NULL
);
2105 static void check_unneeded_dependencies(Unit
*u
) {
2111 assert(UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(u
)));
2113 /* Garbage collect services that might not be needed anymore, if enabled */
2114 HASHMAP_FOREACH_KEY(v
, other
, u
->dependencies
[UNIT_REQUIRES
], i
)
2115 if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other
)))
2116 unit_check_unneeded(other
);
2117 HASHMAP_FOREACH_KEY(v
, other
, u
->dependencies
[UNIT_WANTS
], i
)
2118 if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other
)))
2119 unit_check_unneeded(other
);
2120 HASHMAP_FOREACH_KEY(v
, other
, u
->dependencies
[UNIT_REQUISITE
], i
)
2121 if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other
)))
2122 unit_check_unneeded(other
);
2123 HASHMAP_FOREACH_KEY(v
, other
, u
->dependencies
[UNIT_BINDS_TO
], i
)
2124 if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other
)))
2125 unit_check_unneeded(other
);
2128 void unit_start_on_failure(Unit
*u
) {
2135 if (hashmap_size(u
->dependencies
[UNIT_ON_FAILURE
]) <= 0)
2138 log_unit_info(u
, "Triggering OnFailure= dependencies.");
2140 HASHMAP_FOREACH_KEY(v
, other
, u
->dependencies
[UNIT_ON_FAILURE
], i
) {
2143 r
= manager_add_job(u
->manager
, JOB_START
, other
, u
->on_failure_job_mode
, NULL
, NULL
);
2145 log_unit_error_errno(u
, r
, "Failed to enqueue OnFailure= job: %m");
2149 void unit_trigger_notify(Unit
*u
) {
2156 HASHMAP_FOREACH_KEY(v
, other
, u
->dependencies
[UNIT_TRIGGERED_BY
], i
)
2157 if (UNIT_VTABLE(other
)->trigger_notify
)
2158 UNIT_VTABLE(other
)->trigger_notify(other
, u
);
2161 static int unit_log_resources(Unit
*u
) {
2163 struct iovec iovec
[1 + _CGROUP_IP_ACCOUNTING_METRIC_MAX
+ 4];
2164 size_t n_message_parts
= 0, n_iovec
= 0;
2165 char* message_parts
[3 + 1], *t
;
2166 nsec_t nsec
= NSEC_INFINITY
;
2167 CGroupIPAccountingMetric m
;
2170 const char* const ip_fields
[_CGROUP_IP_ACCOUNTING_METRIC_MAX
] = {
2171 [CGROUP_IP_INGRESS_BYTES
] = "IP_METRIC_INGRESS_BYTES",
2172 [CGROUP_IP_INGRESS_PACKETS
] = "IP_METRIC_INGRESS_PACKETS",
2173 [CGROUP_IP_EGRESS_BYTES
] = "IP_METRIC_EGRESS_BYTES",
2174 [CGROUP_IP_EGRESS_PACKETS
] = "IP_METRIC_EGRESS_PACKETS",
2179 /* Invoked whenever a unit enters failed or dead state. Logs information about consumed resources if resource
2180 * accounting was enabled for a unit. It does this in two ways: a friendly human readable string with reduced
2181 * information and the complete data in structured fields. */
2183 (void) unit_get_cpu_usage(u
, &nsec
);
2184 if (nsec
!= NSEC_INFINITY
) {
2185 char buf
[FORMAT_TIMESPAN_MAX
] = "";
2187 /* Format the CPU time for inclusion in the structured log message */
2188 if (asprintf(&t
, "CPU_USAGE_NSEC=%" PRIu64
, nsec
) < 0) {
2192 iovec
[n_iovec
++] = IOVEC_MAKE_STRING(t
);
2194 /* Format the CPU time for inclusion in the human language message string */
2195 format_timespan(buf
, sizeof(buf
), nsec
/ NSEC_PER_USEC
, USEC_PER_MSEC
);
2196 t
= strjoin(n_message_parts
> 0 ? "consumed " : "Consumed ", buf
, " CPU time");
2202 message_parts
[n_message_parts
++] = t
;
2205 for (m
= 0; m
< _CGROUP_IP_ACCOUNTING_METRIC_MAX
; m
++) {
2206 char buf
[FORMAT_BYTES_MAX
] = "";
2207 uint64_t value
= UINT64_MAX
;
2209 assert(ip_fields
[m
]);
2211 (void) unit_get_ip_accounting(u
, m
, &value
);
2212 if (value
== UINT64_MAX
)
2215 /* Format IP accounting data for inclusion in the structured log message */
2216 if (asprintf(&t
, "%s=%" PRIu64
, ip_fields
[m
], value
) < 0) {
2220 iovec
[n_iovec
++] = IOVEC_MAKE_STRING(t
);
2222 /* Format the IP accounting data for inclusion in the human language message string, but only for the
2223 * bytes counters (and not for the packets counters) */
2224 if (m
== CGROUP_IP_INGRESS_BYTES
)
2225 t
= strjoin(n_message_parts
> 0 ? "received " : "Received ",
2226 format_bytes(buf
, sizeof(buf
), value
),
2228 else if (m
== CGROUP_IP_EGRESS_BYTES
)
2229 t
= strjoin(n_message_parts
> 0 ? "sent " : "Sent ",
2230 format_bytes(buf
, sizeof(buf
), value
),
2239 message_parts
[n_message_parts
++] = t
;
2242 /* Is there any accounting data available at all? */
2248 if (n_message_parts
== 0)
2249 t
= strjoina("MESSAGE=", u
->id
, ": Completed");
2251 _cleanup_free_
char *joined
;
2253 message_parts
[n_message_parts
] = NULL
;
2255 joined
= strv_join(message_parts
, ", ");
2261 t
= strjoina("MESSAGE=", u
->id
, ": ", joined
);
2264 /* The following four fields we allocate on the stack or are static strings, we hence don't want to free them,
2265 * and hence don't increase n_iovec for them */
2266 iovec
[n_iovec
] = IOVEC_MAKE_STRING(t
);
2267 iovec
[n_iovec
+ 1] = IOVEC_MAKE_STRING("MESSAGE_ID=" SD_MESSAGE_UNIT_RESOURCES_STR
);
2269 t
= strjoina(u
->manager
->unit_log_field
, u
->id
);
2270 iovec
[n_iovec
+ 2] = IOVEC_MAKE_STRING(t
);
2272 t
= strjoina(u
->manager
->invocation_log_field
, u
->invocation_id_string
);
2273 iovec
[n_iovec
+ 3] = IOVEC_MAKE_STRING(t
);
2275 log_struct_iovec(LOG_INFO
, iovec
, n_iovec
+ 4);
2279 for (i
= 0; i
< n_message_parts
; i
++)
2280 free(message_parts
[i
]);
2282 for (i
= 0; i
< n_iovec
; i
++)
2283 free(iovec
[i
].iov_base
);
2289 void unit_notify(Unit
*u
, UnitActiveState os
, UnitActiveState ns
, bool reload_success
) {
2294 assert(os
< _UNIT_ACTIVE_STATE_MAX
);
2295 assert(ns
< _UNIT_ACTIVE_STATE_MAX
);
2297 /* Note that this is called for all low-level state changes,
2298 * even if they might map to the same high-level
2299 * UnitActiveState! That means that ns == os is an expected
2300 * behavior here. For example: if a mount point is remounted
2301 * this function will be called too! */
2305 /* Update timestamps for state changes */
2306 if (!MANAGER_IS_RELOADING(m
)) {
2307 dual_timestamp_get(&u
->state_change_timestamp
);
2309 if (UNIT_IS_INACTIVE_OR_FAILED(os
) && !UNIT_IS_INACTIVE_OR_FAILED(ns
))
2310 u
->inactive_exit_timestamp
= u
->state_change_timestamp
;
2311 else if (!UNIT_IS_INACTIVE_OR_FAILED(os
) && UNIT_IS_INACTIVE_OR_FAILED(ns
))
2312 u
->inactive_enter_timestamp
= u
->state_change_timestamp
;
2314 if (!UNIT_IS_ACTIVE_OR_RELOADING(os
) && UNIT_IS_ACTIVE_OR_RELOADING(ns
))
2315 u
->active_enter_timestamp
= u
->state_change_timestamp
;
2316 else if (UNIT_IS_ACTIVE_OR_RELOADING(os
) && !UNIT_IS_ACTIVE_OR_RELOADING(ns
))
2317 u
->active_exit_timestamp
= u
->state_change_timestamp
;
2320 /* Keep track of failed units */
2321 (void) manager_update_failed_units(u
->manager
, u
, ns
== UNIT_FAILED
);
2323 /* Make sure the cgroup and state files are always removed when we become inactive */
2324 if (UNIT_IS_INACTIVE_OR_FAILED(ns
)) {
2325 unit_prune_cgroup(u
);
2326 unit_unlink_state_files(u
);
2329 /* Note that this doesn't apply to RemainAfterExit services exiting
2330 * successfully, since there's no change of state in that case. Which is
2331 * why it is handled in service_set_state() */
2332 if (UNIT_IS_INACTIVE_OR_FAILED(os
) != UNIT_IS_INACTIVE_OR_FAILED(ns
)) {
2335 ec
= unit_get_exec_context(u
);
2336 if (ec
&& exec_context_may_touch_console(ec
)) {
2337 if (UNIT_IS_INACTIVE_OR_FAILED(ns
)) {
2340 if (m
->n_on_console
== 0)
2341 /* unset no_console_output flag, since the console is free */
2342 m
->no_console_output
= false;
2351 if (u
->job
->state
== JOB_WAITING
)
2353 /* So we reached a different state for this
2354 * job. Let's see if we can run it now if it
2355 * failed previously due to EAGAIN. */
2356 job_add_to_run_queue(u
->job
);
2358 /* Let's check whether this state change constitutes a
2359 * finished job, or maybe contradicts a running job and
2360 * hence needs to invalidate jobs. */
2362 switch (u
->job
->type
) {
2365 case JOB_VERIFY_ACTIVE
:
2367 if (UNIT_IS_ACTIVE_OR_RELOADING(ns
))
2368 job_finish_and_invalidate(u
->job
, JOB_DONE
, true, false);
2369 else if (u
->job
->state
== JOB_RUNNING
&& ns
!= UNIT_ACTIVATING
) {
2372 if (UNIT_IS_INACTIVE_OR_FAILED(ns
))
2373 job_finish_and_invalidate(u
->job
, ns
== UNIT_FAILED
? JOB_FAILED
: JOB_DONE
, true, false);
2379 case JOB_RELOAD_OR_START
:
2380 case JOB_TRY_RELOAD
:
2382 if (u
->job
->state
== JOB_RUNNING
) {
2383 if (ns
== UNIT_ACTIVE
)
2384 job_finish_and_invalidate(u
->job
, reload_success
? JOB_DONE
: JOB_FAILED
, true, false);
2385 else if (!IN_SET(ns
, UNIT_ACTIVATING
, UNIT_RELOADING
)) {
2388 if (UNIT_IS_INACTIVE_OR_FAILED(ns
))
2389 job_finish_and_invalidate(u
->job
, ns
== UNIT_FAILED
? JOB_FAILED
: JOB_DONE
, true, false);
2397 case JOB_TRY_RESTART
:
2399 if (UNIT_IS_INACTIVE_OR_FAILED(ns
))
2400 job_finish_and_invalidate(u
->job
, JOB_DONE
, true, false);
2401 else if (u
->job
->state
== JOB_RUNNING
&& ns
!= UNIT_DEACTIVATING
) {
2403 job_finish_and_invalidate(u
->job
, JOB_FAILED
, true, false);
2409 assert_not_reached("Job type unknown");
2415 if (!MANAGER_IS_RELOADING(m
)) {
2417 /* If this state change happened without being
2418 * requested by a job, then let's retroactively start
2419 * or stop dependencies. We skip that step when
2420 * deserializing, since we don't want to create any
2421 * additional jobs just because something is already
2425 if (UNIT_IS_INACTIVE_OR_FAILED(os
) && UNIT_IS_ACTIVE_OR_ACTIVATING(ns
))
2426 retroactively_start_dependencies(u
);
2427 else if (UNIT_IS_ACTIVE_OR_ACTIVATING(os
) && UNIT_IS_INACTIVE_OR_DEACTIVATING(ns
))
2428 retroactively_stop_dependencies(u
);
2431 /* stop unneeded units regardless if going down was expected or not */
2432 if (UNIT_IS_INACTIVE_OR_DEACTIVATING(ns
))
2433 check_unneeded_dependencies(u
);
2435 if (ns
!= os
&& ns
== UNIT_FAILED
) {
2436 log_unit_debug(u
, "Unit entered failed state.");
2437 unit_start_on_failure(u
);
2441 /* Some names are special */
2442 if (UNIT_IS_ACTIVE_OR_RELOADING(ns
)) {
2444 if (unit_has_name(u
, SPECIAL_DBUS_SERVICE
))
2445 /* The bus might have just become available,
2446 * hence try to connect to it, if we aren't
2450 if (u
->type
== UNIT_SERVICE
&&
2451 !UNIT_IS_ACTIVE_OR_RELOADING(os
) &&
2452 !MANAGER_IS_RELOADING(m
)) {
2453 /* Write audit record if we have just finished starting up */
2454 manager_send_unit_audit(m
, u
, AUDIT_SERVICE_START
, true);
2458 if (!UNIT_IS_ACTIVE_OR_RELOADING(os
))
2459 manager_send_unit_plymouth(m
, u
);
2462 /* We don't care about D-Bus going down here, since we'll get an asynchronous notification for it
2465 if (UNIT_IS_INACTIVE_OR_FAILED(ns
) &&
2466 !UNIT_IS_INACTIVE_OR_FAILED(os
)
2467 && !MANAGER_IS_RELOADING(m
)) {
2469 /* This unit just stopped/failed. */
2470 if (u
->type
== UNIT_SERVICE
) {
2472 /* Hmm, if there was no start record written
2473 * write it now, so that we always have a nice
2476 manager_send_unit_audit(m
, u
, AUDIT_SERVICE_START
, ns
== UNIT_INACTIVE
);
2478 if (ns
== UNIT_INACTIVE
)
2479 manager_send_unit_audit(m
, u
, AUDIT_SERVICE_STOP
, true);
2481 /* Write audit record if we have just finished shutting down */
2482 manager_send_unit_audit(m
, u
, AUDIT_SERVICE_STOP
, ns
== UNIT_INACTIVE
);
2484 u
->in_audit
= false;
2487 /* Write a log message about consumed resources */
2488 unit_log_resources(u
);
2492 manager_recheck_journal(m
);
2493 unit_trigger_notify(u
);
2495 if (!MANAGER_IS_RELOADING(u
->manager
)) {
2496 /* Maybe we finished startup and are now ready for
2497 * being stopped because unneeded? */
2498 unit_check_unneeded(u
);
2500 /* Maybe we finished startup, but something we needed
2501 * has vanished? Let's die then. (This happens when
2502 * something BindsTo= to a Type=oneshot unit, as these
2503 * units go directly from starting to inactive,
2504 * without ever entering started.) */
2505 unit_check_binds_to(u
);
2508 unit_add_to_dbus_queue(u
);
2509 unit_add_to_gc_queue(u
);
2512 int unit_watch_pid(Unit
*u
, pid_t pid
) {
2518 /* Watch a specific PID. We only support one or two units
2519 * watching each PID for now, not more. */
2521 r
= set_ensure_allocated(&u
->pids
, NULL
);
2525 r
= hashmap_ensure_allocated(&u
->manager
->watch_pids1
, NULL
);
2529 r
= hashmap_put(u
->manager
->watch_pids1
, PID_TO_PTR(pid
), u
);
2531 r
= hashmap_ensure_allocated(&u
->manager
->watch_pids2
, NULL
);
2535 r
= hashmap_put(u
->manager
->watch_pids2
, PID_TO_PTR(pid
), u
);
2538 q
= set_put(u
->pids
, PID_TO_PTR(pid
));
2545 void unit_unwatch_pid(Unit
*u
, pid_t pid
) {
2549 (void) hashmap_remove_value(u
->manager
->watch_pids1
, PID_TO_PTR(pid
), u
);
2550 (void) hashmap_remove_value(u
->manager
->watch_pids2
, PID_TO_PTR(pid
), u
);
2551 (void) set_remove(u
->pids
, PID_TO_PTR(pid
));
2554 void unit_unwatch_all_pids(Unit
*u
) {
2557 while (!set_isempty(u
->pids
))
2558 unit_unwatch_pid(u
, PTR_TO_PID(set_first(u
->pids
)));
2560 u
->pids
= set_free(u
->pids
);
2563 void unit_tidy_watch_pids(Unit
*u
, pid_t except1
, pid_t except2
) {
2569 /* Cleans dead PIDs from our list */
2571 SET_FOREACH(e
, u
->pids
, i
) {
2572 pid_t pid
= PTR_TO_PID(e
);
2574 if (pid
== except1
|| pid
== except2
)
2577 if (!pid_is_unwaited(pid
))
2578 unit_unwatch_pid(u
, pid
);
2582 bool unit_job_is_applicable(Unit
*u
, JobType j
) {
2584 assert(j
>= 0 && j
< _JOB_TYPE_MAX
);
2588 case JOB_VERIFY_ACTIVE
:
2591 /* Note that we don't check unit_can_start() here. That's because .device units and suchlike are not
2592 * startable by us but may appear due to external events, and it thus makes sense to permit enqueing
2597 /* Similar as above. However, perpetual units can never be stopped (neither explicitly nor due to
2598 * external events), hence it makes no sense to permit enqueing such a request either. */
2599 return !u
->perpetual
;
2602 case JOB_TRY_RESTART
:
2603 return unit_can_stop(u
) && unit_can_start(u
);
2606 case JOB_TRY_RELOAD
:
2607 return unit_can_reload(u
);
2609 case JOB_RELOAD_OR_START
:
2610 return unit_can_reload(u
) && unit_can_start(u
);
2613 assert_not_reached("Invalid job type");
2617 static void maybe_warn_about_dependency(Unit
*u
, const char *other
, UnitDependency dependency
) {
2620 /* Only warn about some unit types */
2621 if (!IN_SET(dependency
, UNIT_CONFLICTS
, UNIT_CONFLICTED_BY
, UNIT_BEFORE
, UNIT_AFTER
, UNIT_ON_FAILURE
, UNIT_TRIGGERS
, UNIT_TRIGGERED_BY
))
2624 if (streq_ptr(u
->id
, other
))
2625 log_unit_warning(u
, "Dependency %s=%s dropped", unit_dependency_to_string(dependency
), u
->id
);
2627 log_unit_warning(u
, "Dependency %s=%s dropped, merged into %s", unit_dependency_to_string(dependency
), strna(other
), u
->id
);
2630 static int unit_add_dependency_hashmap(
2633 UnitDependencyMask origin_mask
,
2634 UnitDependencyMask destination_mask
) {
2636 UnitDependencyInfo info
;
2641 assert(origin_mask
< _UNIT_DEPENDENCY_MASK_FULL
);
2642 assert(destination_mask
< _UNIT_DEPENDENCY_MASK_FULL
);
2643 assert(origin_mask
> 0 || destination_mask
> 0);
2645 r
= hashmap_ensure_allocated(h
, NULL
);
2649 assert_cc(sizeof(void*) == sizeof(info
));
2651 info
.data
= hashmap_get(*h
, other
);
2653 /* Entry already exists. Add in our mask. */
2655 if ((info
.origin_mask
& origin_mask
) == info
.origin_mask
&&
2656 (info
.destination_mask
& destination_mask
) == info
.destination_mask
)
2659 info
.origin_mask
|= origin_mask
;
2660 info
.destination_mask
|= destination_mask
;
2662 r
= hashmap_update(*h
, other
, info
.data
);
2664 info
= (UnitDependencyInfo
) {
2665 .origin_mask
= origin_mask
,
2666 .destination_mask
= destination_mask
,
2669 r
= hashmap_put(*h
, other
, info
.data
);
2677 int unit_add_dependency(
2682 UnitDependencyMask mask
) {
2684 static const UnitDependency inverse_table
[_UNIT_DEPENDENCY_MAX
] = {
2685 [UNIT_REQUIRES
] = UNIT_REQUIRED_BY
,
2686 [UNIT_WANTS
] = UNIT_WANTED_BY
,
2687 [UNIT_REQUISITE
] = UNIT_REQUISITE_OF
,
2688 [UNIT_BINDS_TO
] = UNIT_BOUND_BY
,
2689 [UNIT_PART_OF
] = UNIT_CONSISTS_OF
,
2690 [UNIT_REQUIRED_BY
] = UNIT_REQUIRES
,
2691 [UNIT_REQUISITE_OF
] = UNIT_REQUISITE
,
2692 [UNIT_WANTED_BY
] = UNIT_WANTS
,
2693 [UNIT_BOUND_BY
] = UNIT_BINDS_TO
,
2694 [UNIT_CONSISTS_OF
] = UNIT_PART_OF
,
2695 [UNIT_CONFLICTS
] = UNIT_CONFLICTED_BY
,
2696 [UNIT_CONFLICTED_BY
] = UNIT_CONFLICTS
,
2697 [UNIT_BEFORE
] = UNIT_AFTER
,
2698 [UNIT_AFTER
] = UNIT_BEFORE
,
2699 [UNIT_ON_FAILURE
] = _UNIT_DEPENDENCY_INVALID
,
2700 [UNIT_REFERENCES
] = UNIT_REFERENCED_BY
,
2701 [UNIT_REFERENCED_BY
] = UNIT_REFERENCES
,
2702 [UNIT_TRIGGERS
] = UNIT_TRIGGERED_BY
,
2703 [UNIT_TRIGGERED_BY
] = UNIT_TRIGGERS
,
2704 [UNIT_PROPAGATES_RELOAD_TO
] = UNIT_RELOAD_PROPAGATED_FROM
,
2705 [UNIT_RELOAD_PROPAGATED_FROM
] = UNIT_PROPAGATES_RELOAD_TO
,
2706 [UNIT_JOINS_NAMESPACE_OF
] = UNIT_JOINS_NAMESPACE_OF
,
2708 Unit
*original_u
= u
, *original_other
= other
;
2712 assert(d
>= 0 && d
< _UNIT_DEPENDENCY_MAX
);
2715 u
= unit_follow_merge(u
);
2716 other
= unit_follow_merge(other
);
2718 /* We won't allow dependencies on ourselves. We will not
2719 * consider them an error however. */
2721 maybe_warn_about_dependency(original_u
, original_other
->id
, d
);
2725 if ((d
== UNIT_BEFORE
&& other
->type
== UNIT_DEVICE
) ||
2726 (d
== UNIT_AFTER
&& u
->type
== UNIT_DEVICE
)) {
2727 log_unit_warning(u
, "Dependency Before=%s ignored (.device units cannot be delayed)", other
->id
);
2731 r
= unit_add_dependency_hashmap(u
->dependencies
+ d
, other
, mask
, 0);
2735 if (inverse_table
[d
] != _UNIT_DEPENDENCY_INVALID
&& inverse_table
[d
] != d
) {
2736 r
= unit_add_dependency_hashmap(other
->dependencies
+ inverse_table
[d
], u
, 0, mask
);
2741 if (add_reference
) {
2742 r
= unit_add_dependency_hashmap(u
->dependencies
+ UNIT_REFERENCES
, other
, mask
, 0);
2746 r
= unit_add_dependency_hashmap(other
->dependencies
+ UNIT_REFERENCED_BY
, u
, 0, mask
);
2751 unit_add_to_dbus_queue(u
);
2755 int unit_add_two_dependencies(Unit
*u
, UnitDependency d
, UnitDependency e
, Unit
*other
, bool add_reference
, UnitDependencyMask mask
) {
2760 r
= unit_add_dependency(u
, d
, other
, add_reference
, mask
);
2764 return unit_add_dependency(u
, e
, other
, add_reference
, mask
);
2767 static int resolve_template(Unit
*u
, const char *name
, const char*path
, char **buf
, const char **ret
) {
2771 assert(name
|| path
);
2776 name
= basename(path
);
2778 if (!unit_name_is_valid(name
, UNIT_NAME_TEMPLATE
)) {
2785 r
= unit_name_replace_instance(name
, u
->instance
, buf
);
2787 _cleanup_free_
char *i
= NULL
;
2789 r
= unit_name_to_prefix(u
->id
, &i
);
2793 r
= unit_name_replace_instance(name
, i
, buf
);
2802 int unit_add_dependency_by_name(Unit
*u
, UnitDependency d
, const char *name
, const char *path
, bool add_reference
, UnitDependencyMask mask
) {
2803 _cleanup_free_
char *buf
= NULL
;
2808 assert(name
|| path
);
2810 r
= resolve_template(u
, name
, path
, &buf
, &name
);
2814 r
= manager_load_unit(u
->manager
, name
, path
, NULL
, &other
);
2818 return unit_add_dependency(u
, d
, other
, add_reference
, mask
);
2821 int unit_add_two_dependencies_by_name(Unit
*u
, UnitDependency d
, UnitDependency e
, const char *name
, const char *path
, bool add_reference
, UnitDependencyMask mask
) {
2822 _cleanup_free_
char *buf
= NULL
;
2827 assert(name
|| path
);
2829 r
= resolve_template(u
, name
, path
, &buf
, &name
);
2833 r
= manager_load_unit(u
->manager
, name
, path
, NULL
, &other
);
2837 return unit_add_two_dependencies(u
, d
, e
, other
, add_reference
, mask
);
2840 int set_unit_path(const char *p
) {
2841 /* This is mostly for debug purposes */
2842 if (setenv("SYSTEMD_UNIT_PATH", p
, 1) < 0)
2848 char *unit_dbus_path(Unit
*u
) {
2854 return unit_dbus_path_from_name(u
->id
);
2857 char *unit_dbus_path_invocation_id(Unit
*u
) {
2860 if (sd_id128_is_null(u
->invocation_id
))
2863 return unit_dbus_path_from_name(u
->invocation_id_string
);
2866 int unit_set_slice(Unit
*u
, Unit
*slice
) {
2870 /* Sets the unit slice if it has not been set before. Is extra
2871 * careful, to only allow this for units that actually have a
2872 * cgroup context. Also, we don't allow to set this for slices
2873 * (since the parent slice is derived from the name). Make
2874 * sure the unit we set is actually a slice. */
2876 if (!UNIT_HAS_CGROUP_CONTEXT(u
))
2879 if (u
->type
== UNIT_SLICE
)
2882 if (unit_active_state(u
) != UNIT_INACTIVE
)
2885 if (slice
->type
!= UNIT_SLICE
)
2888 if (unit_has_name(u
, SPECIAL_INIT_SCOPE
) &&
2889 !unit_has_name(slice
, SPECIAL_ROOT_SLICE
))
2892 if (UNIT_DEREF(u
->slice
) == slice
)
2895 /* Disallow slice changes if @u is already bound to cgroups */
2896 if (UNIT_ISSET(u
->slice
) && u
->cgroup_realized
)
2899 unit_ref_unset(&u
->slice
);
2900 unit_ref_set(&u
->slice
, slice
);
2904 int unit_set_default_slice(Unit
*u
) {
2905 _cleanup_free_
char *b
= NULL
;
2906 const char *slice_name
;
2912 if (UNIT_ISSET(u
->slice
))
2916 _cleanup_free_
char *prefix
= NULL
, *escaped
= NULL
;
2918 /* Implicitly place all instantiated units in their
2919 * own per-template slice */
2921 r
= unit_name_to_prefix(u
->id
, &prefix
);
2925 /* The prefix is already escaped, but it might include
2926 * "-" which has a special meaning for slice units,
2927 * hence escape it here extra. */
2928 escaped
= unit_name_escape(prefix
);
2932 if (MANAGER_IS_SYSTEM(u
->manager
))
2933 b
= strjoin("system-", escaped
, ".slice");
2935 b
= strappend(escaped
, ".slice");
2942 MANAGER_IS_SYSTEM(u
->manager
) && !unit_has_name(u
, SPECIAL_INIT_SCOPE
)
2943 ? SPECIAL_SYSTEM_SLICE
2944 : SPECIAL_ROOT_SLICE
;
2946 r
= manager_load_unit(u
->manager
, slice_name
, NULL
, NULL
, &slice
);
2950 return unit_set_slice(u
, slice
);
2953 const char *unit_slice_name(Unit
*u
) {
2956 if (!UNIT_ISSET(u
->slice
))
2959 return UNIT_DEREF(u
->slice
)->id
;
2962 int unit_load_related_unit(Unit
*u
, const char *type
, Unit
**_found
) {
2963 _cleanup_free_
char *t
= NULL
;
2970 r
= unit_name_change_suffix(u
->id
, type
, &t
);
2973 if (unit_has_name(u
, t
))
2976 r
= manager_load_unit(u
->manager
, t
, NULL
, NULL
, _found
);
2977 assert(r
< 0 || *_found
!= u
);
2981 static int signal_name_owner_changed(sd_bus_message
*message
, void *userdata
, sd_bus_error
*error
) {
2982 const char *name
, *old_owner
, *new_owner
;
2989 r
= sd_bus_message_read(message
, "sss", &name
, &old_owner
, &new_owner
);
2991 bus_log_parse_error(r
);
2995 old_owner
= isempty(old_owner
) ? NULL
: old_owner
;
2996 new_owner
= isempty(new_owner
) ? NULL
: new_owner
;
2998 if (UNIT_VTABLE(u
)->bus_name_owner_change
)
2999 UNIT_VTABLE(u
)->bus_name_owner_change(u
, name
, old_owner
, new_owner
);
3004 int unit_install_bus_match(Unit
*u
, sd_bus
*bus
, const char *name
) {
3011 if (u
->match_bus_slot
)
3014 match
= strjoina("type='signal',"
3015 "sender='org.freedesktop.DBus',"
3016 "path='/org/freedesktop/DBus',"
3017 "interface='org.freedesktop.DBus',"
3018 "member='NameOwnerChanged',"
3019 "arg0='", name
, "'");
3021 return sd_bus_add_match(bus
, &u
->match_bus_slot
, match
, signal_name_owner_changed
, u
);
3024 int unit_watch_bus_name(Unit
*u
, const char *name
) {
3030 /* Watch a specific name on the bus. We only support one unit
3031 * watching each name for now. */
3033 if (u
->manager
->api_bus
) {
3034 /* If the bus is already available, install the match directly.
3035 * Otherwise, just put the name in the list. bus_setup_api() will take care later. */
3036 r
= unit_install_bus_match(u
, u
->manager
->api_bus
, name
);
3038 return log_warning_errno(r
, "Failed to subscribe to NameOwnerChanged signal for '%s': %m", name
);
3041 r
= hashmap_put(u
->manager
->watch_bus
, name
, u
);
3043 u
->match_bus_slot
= sd_bus_slot_unref(u
->match_bus_slot
);
3044 return log_warning_errno(r
, "Failed to put bus name to hashmap: %m");
3050 void unit_unwatch_bus_name(Unit
*u
, const char *name
) {
3054 (void) hashmap_remove_value(u
->manager
->watch_bus
, name
, u
);
3055 u
->match_bus_slot
= sd_bus_slot_unref(u
->match_bus_slot
);
3058 bool unit_can_serialize(Unit
*u
) {
3061 return UNIT_VTABLE(u
)->serialize
&& UNIT_VTABLE(u
)->deserialize_item
;
3064 static int unit_serialize_cgroup_mask(FILE *f
, const char *key
, CGroupMask mask
) {
3065 _cleanup_free_
char *s
= NULL
;
3072 r
= cg_mask_to_string(mask
, &s
);
3083 static const char *ip_accounting_metric_field
[_CGROUP_IP_ACCOUNTING_METRIC_MAX
] = {
3084 [CGROUP_IP_INGRESS_BYTES
] = "ip-accounting-ingress-bytes",
3085 [CGROUP_IP_INGRESS_PACKETS
] = "ip-accounting-ingress-packets",
3086 [CGROUP_IP_EGRESS_BYTES
] = "ip-accounting-egress-bytes",
3087 [CGROUP_IP_EGRESS_PACKETS
] = "ip-accounting-egress-packets",
3090 int unit_serialize(Unit
*u
, FILE *f
, FDSet
*fds
, bool serialize_jobs
) {
3091 CGroupIPAccountingMetric m
;
3098 if (unit_can_serialize(u
)) {
3101 r
= UNIT_VTABLE(u
)->serialize(u
, f
, fds
);
3105 rt
= unit_get_exec_runtime(u
);
3107 r
= exec_runtime_serialize(u
, rt
, f
, fds
);
3113 dual_timestamp_serialize(f
, "state-change-timestamp", &u
->state_change_timestamp
);
3115 dual_timestamp_serialize(f
, "inactive-exit-timestamp", &u
->inactive_exit_timestamp
);
3116 dual_timestamp_serialize(f
, "active-enter-timestamp", &u
->active_enter_timestamp
);
3117 dual_timestamp_serialize(f
, "active-exit-timestamp", &u
->active_exit_timestamp
);
3118 dual_timestamp_serialize(f
, "inactive-enter-timestamp", &u
->inactive_enter_timestamp
);
3120 dual_timestamp_serialize(f
, "condition-timestamp", &u
->condition_timestamp
);
3121 dual_timestamp_serialize(f
, "assert-timestamp", &u
->assert_timestamp
);
3123 if (dual_timestamp_is_set(&u
->condition_timestamp
))
3124 unit_serialize_item(u
, f
, "condition-result", yes_no(u
->condition_result
));
3126 if (dual_timestamp_is_set(&u
->assert_timestamp
))
3127 unit_serialize_item(u
, f
, "assert-result", yes_no(u
->assert_result
));
3129 unit_serialize_item(u
, f
, "transient", yes_no(u
->transient
));
3131 unit_serialize_item(u
, f
, "exported-invocation-id", yes_no(u
->exported_invocation_id
));
3132 unit_serialize_item(u
, f
, "exported-log-level-max", yes_no(u
->exported_log_level_max
));
3133 unit_serialize_item(u
, f
, "exported-log-extra-fields", yes_no(u
->exported_log_extra_fields
));
3135 unit_serialize_item_format(u
, f
, "cpu-usage-base", "%" PRIu64
, u
->cpu_usage_base
);
3136 if (u
->cpu_usage_last
!= NSEC_INFINITY
)
3137 unit_serialize_item_format(u
, f
, "cpu-usage-last", "%" PRIu64
, u
->cpu_usage_last
);
3140 unit_serialize_item(u
, f
, "cgroup", u
->cgroup_path
);
3141 unit_serialize_item(u
, f
, "cgroup-realized", yes_no(u
->cgroup_realized
));
3142 (void) unit_serialize_cgroup_mask(f
, "cgroup-realized-mask", u
->cgroup_realized_mask
);
3143 (void) unit_serialize_cgroup_mask(f
, "cgroup-enabled-mask", u
->cgroup_enabled_mask
);
3144 unit_serialize_item_format(u
, f
, "cgroup-bpf-realized", "%i", u
->cgroup_bpf_state
);
3146 if (uid_is_valid(u
->ref_uid
))
3147 unit_serialize_item_format(u
, f
, "ref-uid", UID_FMT
, u
->ref_uid
);
3148 if (gid_is_valid(u
->ref_gid
))
3149 unit_serialize_item_format(u
, f
, "ref-gid", GID_FMT
, u
->ref_gid
);
3151 if (!sd_id128_is_null(u
->invocation_id
))
3152 unit_serialize_item_format(u
, f
, "invocation-id", SD_ID128_FORMAT_STR
, SD_ID128_FORMAT_VAL(u
->invocation_id
));
3154 bus_track_serialize(u
->bus_track
, f
, "ref");
3156 for (m
= 0; m
< _CGROUP_IP_ACCOUNTING_METRIC_MAX
; m
++) {
3159 r
= unit_get_ip_accounting(u
, m
, &v
);
3161 unit_serialize_item_format(u
, f
, ip_accounting_metric_field
[m
], "%" PRIu64
, v
);
3164 if (serialize_jobs
) {
3166 fprintf(f
, "job\n");
3167 job_serialize(u
->job
, f
);
3171 fprintf(f
, "job\n");
3172 job_serialize(u
->nop_job
, f
);
3181 int unit_serialize_item(Unit
*u
, FILE *f
, const char *key
, const char *value
) {
3197 int unit_serialize_item_escaped(Unit
*u
, FILE *f
, const char *key
, const char *value
) {
3198 _cleanup_free_
char *c
= NULL
;
3219 int unit_serialize_item_fd(Unit
*u
, FILE *f
, FDSet
*fds
, const char *key
, int fd
) {
3229 copy
= fdset_put_dup(fds
, fd
);
3233 fprintf(f
, "%s=%i\n", key
, copy
);
3237 void unit_serialize_item_format(Unit
*u
, FILE *f
, const char *key
, const char *format
, ...) {
3248 va_start(ap
, format
);
3249 vfprintf(f
, format
, ap
);
3255 int unit_deserialize(Unit
*u
, FILE *f
, FDSet
*fds
) {
3256 ExecRuntime
**rt
= NULL
;
3264 offset
= UNIT_VTABLE(u
)->exec_runtime_offset
;
3266 rt
= (ExecRuntime
**) ((uint8_t*) u
+ offset
);
3269 char line
[LINE_MAX
], *l
, *v
;
3270 CGroupIPAccountingMetric m
;
3273 if (!fgets(line
, sizeof(line
), f
)) {
3286 k
= strcspn(l
, "=");
3294 if (streq(l
, "job")) {
3296 /* new-style serialized job */
3303 r
= job_deserialize(j
, f
);
3309 r
= hashmap_put(u
->manager
->jobs
, UINT32_TO_PTR(j
->id
), j
);
3315 r
= job_install_deserialized(j
);
3317 hashmap_remove(u
->manager
->jobs
, UINT32_TO_PTR(j
->id
));
3321 } else /* legacy for pre-44 */
3322 log_unit_warning(u
, "Update from too old systemd versions are unsupported, cannot deserialize job: %s", v
);
3324 } else if (streq(l
, "state-change-timestamp")) {
3325 dual_timestamp_deserialize(v
, &u
->state_change_timestamp
);
3327 } else if (streq(l
, "inactive-exit-timestamp")) {
3328 dual_timestamp_deserialize(v
, &u
->inactive_exit_timestamp
);
3330 } else if (streq(l
, "active-enter-timestamp")) {
3331 dual_timestamp_deserialize(v
, &u
->active_enter_timestamp
);
3333 } else if (streq(l
, "active-exit-timestamp")) {
3334 dual_timestamp_deserialize(v
, &u
->active_exit_timestamp
);
3336 } else if (streq(l
, "inactive-enter-timestamp")) {
3337 dual_timestamp_deserialize(v
, &u
->inactive_enter_timestamp
);
3339 } else if (streq(l
, "condition-timestamp")) {
3340 dual_timestamp_deserialize(v
, &u
->condition_timestamp
);
3342 } else if (streq(l
, "assert-timestamp")) {
3343 dual_timestamp_deserialize(v
, &u
->assert_timestamp
);
3345 } else if (streq(l
, "condition-result")) {
3347 r
= parse_boolean(v
);
3349 log_unit_debug(u
, "Failed to parse condition result value %s, ignoring.", v
);
3351 u
->condition_result
= r
;
3355 } else if (streq(l
, "assert-result")) {
3357 r
= parse_boolean(v
);
3359 log_unit_debug(u
, "Failed to parse assert result value %s, ignoring.", v
);
3361 u
->assert_result
= r
;
3365 } else if (streq(l
, "transient")) {
3367 r
= parse_boolean(v
);
3369 log_unit_debug(u
, "Failed to parse transient bool %s, ignoring.", v
);
3375 } else if (streq(l
, "exported-invocation-id")) {
3377 r
= parse_boolean(v
);
3379 log_unit_debug(u
, "Failed to parse exported invocation ID bool %s, ignoring.", v
);
3381 u
->exported_invocation_id
= r
;
3385 } else if (streq(l
, "exported-log-level-max")) {
3387 r
= parse_boolean(v
);
3389 log_unit_debug(u
, "Failed to parse exported log level max bool %s, ignoring.", v
);
3391 u
->exported_log_level_max
= r
;
3395 } else if (streq(l
, "exported-log-extra-fields")) {
3397 r
= parse_boolean(v
);
3399 log_unit_debug(u
, "Failed to parse exported log extra fields bool %s, ignoring.", v
);
3401 u
->exported_log_extra_fields
= r
;
3405 } else if (STR_IN_SET(l
, "cpu-usage-base", "cpuacct-usage-base")) {
3407 r
= safe_atou64(v
, &u
->cpu_usage_base
);
3409 log_unit_debug(u
, "Failed to parse CPU usage base %s, ignoring.", v
);
3413 } else if (streq(l
, "cpu-usage-last")) {
3415 r
= safe_atou64(v
, &u
->cpu_usage_last
);
3417 log_unit_debug(u
, "Failed to read CPU usage last %s, ignoring.", v
);
3421 } else if (streq(l
, "cgroup")) {
3423 r
= unit_set_cgroup_path(u
, v
);
3425 log_unit_debug_errno(u
, r
, "Failed to set cgroup path %s, ignoring: %m", v
);
3427 (void) unit_watch_cgroup(u
);
3430 } else if (streq(l
, "cgroup-realized")) {
3433 b
= parse_boolean(v
);
3435 log_unit_debug(u
, "Failed to parse cgroup-realized bool %s, ignoring.", v
);
3437 u
->cgroup_realized
= b
;
3441 } else if (streq(l
, "cgroup-realized-mask")) {
3443 r
= cg_mask_from_string(v
, &u
->cgroup_realized_mask
);
3445 log_unit_debug(u
, "Failed to parse cgroup-realized-mask %s, ignoring.", v
);
3448 } else if (streq(l
, "cgroup-enabled-mask")) {
3450 r
= cg_mask_from_string(v
, &u
->cgroup_enabled_mask
);
3452 log_unit_debug(u
, "Failed to parse cgroup-enabled-mask %s, ignoring.", v
);
3455 } else if (streq(l
, "cgroup-bpf-realized")) {
3458 r
= safe_atoi(v
, &i
);
3460 log_unit_debug(u
, "Failed to parse cgroup BPF state %s, ignoring.", v
);
3462 u
->cgroup_bpf_state
=
3463 i
< 0 ? UNIT_CGROUP_BPF_INVALIDATED
:
3464 i
> 0 ? UNIT_CGROUP_BPF_ON
:
3465 UNIT_CGROUP_BPF_OFF
;
3469 } else if (streq(l
, "ref-uid")) {
3472 r
= parse_uid(v
, &uid
);
3474 log_unit_debug(u
, "Failed to parse referenced UID %s, ignoring.", v
);
3476 unit_ref_uid_gid(u
, uid
, GID_INVALID
);
3480 } else if (streq(l
, "ref-gid")) {
3483 r
= parse_gid(v
, &gid
);
3485 log_unit_debug(u
, "Failed to parse referenced GID %s, ignoring.", v
);
3487 unit_ref_uid_gid(u
, UID_INVALID
, gid
);
3489 } else if (streq(l
, "ref")) {
3491 r
= strv_extend(&u
->deserialized_refs
, v
);
3496 } else if (streq(l
, "invocation-id")) {
3499 r
= sd_id128_from_string(v
, &id
);
3501 log_unit_debug(u
, "Failed to parse invocation id %s, ignoring.", v
);
3503 r
= unit_set_invocation_id(u
, id
);
3505 log_unit_warning_errno(u
, r
, "Failed to set invocation ID for unit: %m");
3511 /* Check if this is an IP accounting metric serialization field */
3512 for (m
= 0; m
< _CGROUP_IP_ACCOUNTING_METRIC_MAX
; m
++)
3513 if (streq(l
, ip_accounting_metric_field
[m
]))
3515 if (m
< _CGROUP_IP_ACCOUNTING_METRIC_MAX
) {
3518 r
= safe_atou64(v
, &c
);
3520 log_unit_debug(u
, "Failed to parse IP accounting value %s, ignoring.", v
);
3522 u
->ip_accounting_extra
[m
] = c
;
3526 if (unit_can_serialize(u
)) {
3528 r
= exec_runtime_deserialize_item(u
, rt
, l
, v
, fds
);
3530 log_unit_warning(u
, "Failed to deserialize runtime parameter '%s', ignoring.", l
);
3534 /* Returns positive if key was handled by the call */
3539 r
= UNIT_VTABLE(u
)->deserialize_item(u
, l
, v
, fds
);
3541 log_unit_warning(u
, "Failed to deserialize unit parameter '%s', ignoring.", l
);
3545 /* Versions before 228 did not carry a state change timestamp. In this case, take the current time. This is
3546 * useful, so that timeouts based on this timestamp don't trigger too early, and is in-line with the logic from
3547 * before 228 where the base for timeouts was not persistent across reboots. */
3549 if (!dual_timestamp_is_set(&u
->state_change_timestamp
))
3550 dual_timestamp_get(&u
->state_change_timestamp
);
3552 /* Let's make sure that everything that is deserialized also gets any potential new cgroup settings applied
3553 * after we are done. For that we invalidate anything already realized, so that we can realize it again. */
3554 unit_invalidate_cgroup(u
, _CGROUP_MASK_ALL
);
3555 unit_invalidate_cgroup_bpf(u
);
3560 void unit_deserialize_skip(FILE *f
) {
3563 /* Skip serialized data for this unit. We don't know what it is. */
3566 char line
[LINE_MAX
], *l
;
3568 if (!fgets(line
, sizeof line
, f
))
3581 int unit_add_node_dependency(Unit
*u
, const char *what
, bool wants
, UnitDependency dep
, UnitDependencyMask mask
) {
3583 _cleanup_free_
char *e
= NULL
;
3588 /* Adds in links to the device node that this unit is based on */
3592 if (!is_device_path(what
))
3595 /* When device units aren't supported (such as in a
3596 * container), don't create dependencies on them. */
3597 if (!unit_type_supported(UNIT_DEVICE
))
3600 r
= unit_name_from_path(what
, ".device", &e
);
3604 r
= manager_load_unit(u
->manager
, e
, NULL
, NULL
, &device
);
3608 if (dep
== UNIT_REQUIRES
&& device_shall_be_bound_by(device
, u
))
3609 dep
= UNIT_BINDS_TO
;
3611 r
= unit_add_two_dependencies(u
, UNIT_AFTER
,
3612 MANAGER_IS_SYSTEM(u
->manager
) ? dep
: UNIT_WANTS
,
3613 device
, true, mask
);
3618 r
= unit_add_dependency(device
, UNIT_WANTS
, u
, false, mask
);
3626 int unit_coldplug(Unit
*u
) {
3632 /* Make sure we don't enter a loop, when coldplugging
3637 u
->coldplugged
= true;
3639 STRV_FOREACH(i
, u
->deserialized_refs
) {
3640 q
= bus_unit_track_add_name(u
, *i
);
3641 if (q
< 0 && r
>= 0)
3644 u
->deserialized_refs
= strv_free(u
->deserialized_refs
);
3646 if (UNIT_VTABLE(u
)->coldplug
) {
3647 q
= UNIT_VTABLE(u
)->coldplug(u
);
3648 if (q
< 0 && r
>= 0)
3653 q
= job_coldplug(u
->job
);
3654 if (q
< 0 && r
>= 0)
3661 static bool fragment_mtime_newer(const char *path
, usec_t mtime
, bool path_masked
) {
3667 /* If the source is some virtual kernel file system, then we assume we watch it anyway, and hence pretend we
3668 * are never out-of-date. */
3669 if (PATH_STARTSWITH_SET(path
, "/proc", "/sys"))
3672 if (stat(path
, &st
) < 0)
3673 /* What, cannot access this anymore? */
3677 /* For masked files check if they are still so */
3678 return !null_or_empty(&st
);
3680 /* For non-empty files check the mtime */
3681 return timespec_load(&st
.st_mtim
) > mtime
;
3686 bool unit_need_daemon_reload(Unit
*u
) {
3687 _cleanup_strv_free_
char **t
= NULL
;
3692 /* For unit files, we allow masking… */
3693 if (fragment_mtime_newer(u
->fragment_path
, u
->fragment_mtime
,
3694 u
->load_state
== UNIT_MASKED
))
3697 /* Source paths should not be masked… */
3698 if (fragment_mtime_newer(u
->source_path
, u
->source_mtime
, false))
3701 if (u
->load_state
== UNIT_LOADED
)
3702 (void) unit_find_dropin_paths(u
, &t
);
3703 if (!strv_equal(u
->dropin_paths
, t
))
3706 /* … any drop-ins that are masked are simply omitted from the list. */
3707 STRV_FOREACH(path
, u
->dropin_paths
)
3708 if (fragment_mtime_newer(*path
, u
->dropin_mtime
, false))
3714 void unit_reset_failed(Unit
*u
) {
3717 if (UNIT_VTABLE(u
)->reset_failed
)
3718 UNIT_VTABLE(u
)->reset_failed(u
);
3720 RATELIMIT_RESET(u
->start_limit
);
3721 u
->start_limit_hit
= false;
3724 Unit
*unit_following(Unit
*u
) {
3727 if (UNIT_VTABLE(u
)->following
)
3728 return UNIT_VTABLE(u
)->following(u
);
3733 bool unit_stop_pending(Unit
*u
) {
3736 /* This call does check the current state of the unit. It's
3737 * hence useful to be called from state change calls of the
3738 * unit itself, where the state isn't updated yet. This is
3739 * different from unit_inactive_or_pending() which checks both
3740 * the current state and for a queued job. */
3742 return u
->job
&& u
->job
->type
== JOB_STOP
;
3745 bool unit_inactive_or_pending(Unit
*u
) {
3748 /* Returns true if the unit is inactive or going down */
3750 if (UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(u
)))
3753 if (unit_stop_pending(u
))
3759 bool unit_active_or_pending(Unit
*u
) {
3762 /* Returns true if the unit is active or going up */
3764 if (UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(u
)))
3768 IN_SET(u
->job
->type
, JOB_START
, JOB_RELOAD_OR_START
, JOB_RESTART
))
3774 int unit_kill(Unit
*u
, KillWho w
, int signo
, sd_bus_error
*error
) {
3776 assert(w
>= 0 && w
< _KILL_WHO_MAX
);
3777 assert(SIGNAL_VALID(signo
));
3779 if (!UNIT_VTABLE(u
)->kill
)
3782 return UNIT_VTABLE(u
)->kill(u
, w
, signo
, error
);
3785 static Set
*unit_pid_set(pid_t main_pid
, pid_t control_pid
) {
3789 pid_set
= set_new(NULL
);
3793 /* Exclude the main/control pids from being killed via the cgroup */
3795 r
= set_put(pid_set
, PID_TO_PTR(main_pid
));
3800 if (control_pid
> 0) {
3801 r
= set_put(pid_set
, PID_TO_PTR(control_pid
));
3813 int unit_kill_common(
3819 sd_bus_error
*error
) {
3822 bool killed
= false;
3824 if (IN_SET(who
, KILL_MAIN
, KILL_MAIN_FAIL
)) {
3826 return sd_bus_error_setf(error
, BUS_ERROR_NO_SUCH_PROCESS
, "%s units have no main processes", unit_type_to_string(u
->type
));
3827 else if (main_pid
== 0)
3828 return sd_bus_error_set_const(error
, BUS_ERROR_NO_SUCH_PROCESS
, "No main process to kill");
3831 if (IN_SET(who
, KILL_CONTROL
, KILL_CONTROL_FAIL
)) {
3832 if (control_pid
< 0)
3833 return sd_bus_error_setf(error
, BUS_ERROR_NO_SUCH_PROCESS
, "%s units have no control processes", unit_type_to_string(u
->type
));
3834 else if (control_pid
== 0)
3835 return sd_bus_error_set_const(error
, BUS_ERROR_NO_SUCH_PROCESS
, "No control process to kill");
3838 if (IN_SET(who
, KILL_CONTROL
, KILL_CONTROL_FAIL
, KILL_ALL
, KILL_ALL_FAIL
))
3839 if (control_pid
> 0) {
3840 if (kill(control_pid
, signo
) < 0)
3846 if (IN_SET(who
, KILL_MAIN
, KILL_MAIN_FAIL
, KILL_ALL
, KILL_ALL_FAIL
))
3848 if (kill(main_pid
, signo
) < 0)
3854 if (IN_SET(who
, KILL_ALL
, KILL_ALL_FAIL
) && u
->cgroup_path
) {
3855 _cleanup_set_free_ Set
*pid_set
= NULL
;
3858 /* Exclude the main/control pids from being killed via the cgroup */
3859 pid_set
= unit_pid_set(main_pid
, control_pid
);
3863 q
= cg_kill_recursive(SYSTEMD_CGROUP_CONTROLLER
, u
->cgroup_path
, signo
, 0, pid_set
, NULL
, NULL
);
3864 if (q
< 0 && !IN_SET(q
, -EAGAIN
, -ESRCH
, -ENOENT
))
3870 if (r
== 0 && !killed
&& IN_SET(who
, KILL_ALL_FAIL
, KILL_CONTROL_FAIL
))
3876 int unit_following_set(Unit
*u
, Set
**s
) {
3880 if (UNIT_VTABLE(u
)->following_set
)
3881 return UNIT_VTABLE(u
)->following_set(u
, s
);
3887 UnitFileState
unit_get_unit_file_state(Unit
*u
) {
3892 if (u
->unit_file_state
< 0 && u
->fragment_path
) {
3893 r
= unit_file_get_state(
3894 u
->manager
->unit_file_scope
,
3896 basename(u
->fragment_path
),
3897 &u
->unit_file_state
);
3899 u
->unit_file_state
= UNIT_FILE_BAD
;
3902 return u
->unit_file_state
;
3905 int unit_get_unit_file_preset(Unit
*u
) {
3908 if (u
->unit_file_preset
< 0 && u
->fragment_path
)
3909 u
->unit_file_preset
= unit_file_query_preset(
3910 u
->manager
->unit_file_scope
,
3912 basename(u
->fragment_path
));
3914 return u
->unit_file_preset
;
3917 Unit
* unit_ref_set(UnitRef
*ref
, Unit
*u
) {
3922 unit_ref_unset(ref
);
3925 LIST_PREPEND(refs
, u
->refs
, ref
);
3929 void unit_ref_unset(UnitRef
*ref
) {
3935 /* We are about to drop a reference to the unit, make sure the garbage collection has a look at it as it might
3936 * be unreferenced now. */
3937 unit_add_to_gc_queue(ref
->unit
);
3939 LIST_REMOVE(refs
, ref
->unit
->refs
, ref
);
3943 static int user_from_unit_name(Unit
*u
, char **ret
) {
3945 static const uint8_t hash_key
[] = {
3946 0x58, 0x1a, 0xaf, 0xe6, 0x28, 0x58, 0x4e, 0x96,
3947 0xb4, 0x4e, 0xf5, 0x3b, 0x8c, 0x92, 0x07, 0xec
3950 _cleanup_free_
char *n
= NULL
;
3953 r
= unit_name_to_prefix(u
->id
, &n
);
3957 if (valid_user_group_name(n
)) {
3963 /* If we can't use the unit name as a user name, then let's hash it and use that */
3964 if (asprintf(ret
, "_du%016" PRIx64
, siphash24(n
, strlen(n
), hash_key
)) < 0)
3970 int unit_patch_contexts(Unit
*u
) {
3978 /* Patch in the manager defaults into the exec and cgroup
3979 * contexts, _after_ the rest of the settings have been
3982 ec
= unit_get_exec_context(u
);
3984 /* This only copies in the ones that need memory */
3985 for (i
= 0; i
< _RLIMIT_MAX
; i
++)
3986 if (u
->manager
->rlimit
[i
] && !ec
->rlimit
[i
]) {
3987 ec
->rlimit
[i
] = newdup(struct rlimit
, u
->manager
->rlimit
[i
], 1);
3992 if (MANAGER_IS_USER(u
->manager
) &&
3993 !ec
->working_directory
) {
3995 r
= get_home_dir(&ec
->working_directory
);
3999 /* Allow user services to run, even if the
4000 * home directory is missing */
4001 ec
->working_directory_missing_ok
= true;
4004 if (ec
->private_devices
)
4005 ec
->capability_bounding_set
&= ~((UINT64_C(1) << CAP_MKNOD
) | (UINT64_C(1) << CAP_SYS_RAWIO
));
4007 if (ec
->protect_kernel_modules
)
4008 ec
->capability_bounding_set
&= ~(UINT64_C(1) << CAP_SYS_MODULE
);
4010 if (ec
->dynamic_user
) {
4012 r
= user_from_unit_name(u
, &ec
->user
);
4018 ec
->group
= strdup(ec
->user
);
4023 /* If the dynamic user option is on, let's make sure that the unit can't leave its UID/GID
4024 * around in the file system or on IPC objects. Hence enforce a strict sandbox. */
4026 ec
->private_tmp
= true;
4027 ec
->remove_ipc
= true;
4028 ec
->protect_system
= PROTECT_SYSTEM_STRICT
;
4029 if (ec
->protect_home
== PROTECT_HOME_NO
)
4030 ec
->protect_home
= PROTECT_HOME_READ_ONLY
;
4034 cc
= unit_get_cgroup_context(u
);
4038 ec
->private_devices
&&
4039 cc
->device_policy
== CGROUP_AUTO
)
4040 cc
->device_policy
= CGROUP_CLOSED
;
4046 ExecContext
*unit_get_exec_context(Unit
*u
) {
4053 offset
= UNIT_VTABLE(u
)->exec_context_offset
;
4057 return (ExecContext
*) ((uint8_t*) u
+ offset
);
4060 KillContext
*unit_get_kill_context(Unit
*u
) {
4067 offset
= UNIT_VTABLE(u
)->kill_context_offset
;
4071 return (KillContext
*) ((uint8_t*) u
+ offset
);
4074 CGroupContext
*unit_get_cgroup_context(Unit
*u
) {
4080 offset
= UNIT_VTABLE(u
)->cgroup_context_offset
;
4084 return (CGroupContext
*) ((uint8_t*) u
+ offset
);
4087 ExecRuntime
*unit_get_exec_runtime(Unit
*u
) {
4093 offset
= UNIT_VTABLE(u
)->exec_runtime_offset
;
4097 return *(ExecRuntime
**) ((uint8_t*) u
+ offset
);
4100 static const char* unit_drop_in_dir(Unit
*u
, UnitSetPropertiesMode mode
) {
4103 if (!IN_SET(mode
, UNIT_RUNTIME
, UNIT_PERSISTENT
))
4106 if (u
->transient
) /* Redirect drop-ins for transient units always into the transient directory. */
4107 return u
->manager
->lookup_paths
.transient
;
4109 if (mode
== UNIT_RUNTIME
)
4110 return u
->manager
->lookup_paths
.runtime_control
;
4112 if (mode
== UNIT_PERSISTENT
)
4113 return u
->manager
->lookup_paths
.persistent_control
;
4118 int unit_write_drop_in(Unit
*u
, UnitSetPropertiesMode mode
, const char *name
, const char *data
) {
4119 _cleanup_free_
char *p
= NULL
, *q
= NULL
;
4120 const char *dir
, *wrapped
;
4125 if (u
->transient_file
) {
4126 /* When this is a transient unit file in creation, then let's not create a new drop-in but instead
4127 * write to the transient unit file. */
4128 fputs(data
, u
->transient_file
);
4129 fputc('\n', u
->transient_file
);
4133 if (!IN_SET(mode
, UNIT_PERSISTENT
, UNIT_RUNTIME
))
4136 dir
= unit_drop_in_dir(u
, mode
);
4140 wrapped
= strjoina("# This is a drop-in unit file extension, created via \"systemctl set-property\"\n"
4141 "# or an equivalent operation. Do not edit.\n",
4145 r
= drop_in_file(dir
, u
->id
, 50, name
, &p
, &q
);
4149 (void) mkdir_p(p
, 0755);
4150 r
= write_string_file_atomic_label(q
, wrapped
);
4154 r
= strv_push(&u
->dropin_paths
, q
);
4159 strv_uniq(u
->dropin_paths
);
4161 u
->dropin_mtime
= now(CLOCK_REALTIME
);
4166 int unit_write_drop_in_format(Unit
*u
, UnitSetPropertiesMode mode
, const char *name
, const char *format
, ...) {
4167 _cleanup_free_
char *p
= NULL
;
4175 if (!IN_SET(mode
, UNIT_PERSISTENT
, UNIT_RUNTIME
))
4178 va_start(ap
, format
);
4179 r
= vasprintf(&p
, format
, ap
);
4185 return unit_write_drop_in(u
, mode
, name
, p
);
4188 int unit_write_drop_in_private(Unit
*u
, UnitSetPropertiesMode mode
, const char *name
, const char *data
) {
4195 if (!UNIT_VTABLE(u
)->private_section
)
4198 if (!IN_SET(mode
, UNIT_PERSISTENT
, UNIT_RUNTIME
))
4201 ndata
= strjoina("[", UNIT_VTABLE(u
)->private_section
, "]\n", data
);
4203 return unit_write_drop_in(u
, mode
, name
, ndata
);
4206 int unit_write_drop_in_private_format(Unit
*u
, UnitSetPropertiesMode mode
, const char *name
, const char *format
, ...) {
4207 _cleanup_free_
char *p
= NULL
;
4215 if (!IN_SET(mode
, UNIT_PERSISTENT
, UNIT_RUNTIME
))
4218 va_start(ap
, format
);
4219 r
= vasprintf(&p
, format
, ap
);
4225 return unit_write_drop_in_private(u
, mode
, name
, p
);
4228 int unit_make_transient(Unit
*u
) {
4234 if (!UNIT_VTABLE(u
)->can_transient
)
4237 path
= strjoin(u
->manager
->lookup_paths
.transient
, "/", u
->id
);
4241 /* Let's open the file we'll write the transient settings into. This file is kept open as long as we are
4242 * creating the transient, and is closed in unit_load(), as soon as we start loading the file. */
4244 RUN_WITH_UMASK(0022) {
4245 f
= fopen(path
, "we");
4252 if (u
->transient_file
)
4253 fclose(u
->transient_file
);
4254 u
->transient_file
= f
;
4256 free(u
->fragment_path
);
4257 u
->fragment_path
= path
;
4259 u
->source_path
= mfree(u
->source_path
);
4260 u
->dropin_paths
= strv_free(u
->dropin_paths
);
4261 u
->fragment_mtime
= u
->source_mtime
= u
->dropin_mtime
= 0;
4263 u
->load_state
= UNIT_STUB
;
4265 u
->transient
= true;
4267 unit_add_to_dbus_queue(u
);
4268 unit_add_to_gc_queue(u
);
4270 fputs("# This is a transient unit file, created programmatically via the systemd API. Do not edit.\n",
4276 static void log_kill(pid_t pid
, int sig
, void *userdata
) {
4277 _cleanup_free_
char *comm
= NULL
;
4279 (void) get_process_comm(pid
, &comm
);
4281 /* Don't log about processes marked with brackets, under the assumption that these are temporary processes
4282 only, like for example systemd's own PAM stub process. */
4283 if (comm
&& comm
[0] == '(')
4286 log_unit_notice(userdata
,
4287 "Killing process " PID_FMT
" (%s) with signal SIG%s.",
4290 signal_to_string(sig
));
4293 static int operation_to_signal(KillContext
*c
, KillOperation k
) {
4298 case KILL_TERMINATE
:
4299 case KILL_TERMINATE_AND_LOG
:
4300 return c
->kill_signal
;
4309 assert_not_reached("KillOperation unknown");
4313 int unit_kill_context(
4319 bool main_pid_alien
) {
4321 bool wait_for_exit
= false, send_sighup
;
4322 cg_kill_log_func_t log_func
= NULL
;
4328 /* Kill the processes belonging to this unit, in preparation for shutting the unit down.
4329 * Returns > 0 if we killed something worth waiting for, 0 otherwise. */
4331 if (c
->kill_mode
== KILL_NONE
)
4334 sig
= operation_to_signal(c
, k
);
4338 IN_SET(k
, KILL_TERMINATE
, KILL_TERMINATE_AND_LOG
) &&
4341 if (k
!= KILL_TERMINATE
|| IN_SET(sig
, SIGKILL
, SIGABRT
))
4342 log_func
= log_kill
;
4346 log_func(main_pid
, sig
, u
);
4348 r
= kill_and_sigcont(main_pid
, sig
);
4349 if (r
< 0 && r
!= -ESRCH
) {
4350 _cleanup_free_
char *comm
= NULL
;
4351 (void) get_process_comm(main_pid
, &comm
);
4353 log_unit_warning_errno(u
, r
, "Failed to kill main process " PID_FMT
" (%s), ignoring: %m", main_pid
, strna(comm
));
4355 if (!main_pid_alien
)
4356 wait_for_exit
= true;
4358 if (r
!= -ESRCH
&& send_sighup
)
4359 (void) kill(main_pid
, SIGHUP
);
4363 if (control_pid
> 0) {
4365 log_func(control_pid
, sig
, u
);
4367 r
= kill_and_sigcont(control_pid
, sig
);
4368 if (r
< 0 && r
!= -ESRCH
) {
4369 _cleanup_free_
char *comm
= NULL
;
4370 (void) get_process_comm(control_pid
, &comm
);
4372 log_unit_warning_errno(u
, r
, "Failed to kill control process " PID_FMT
" (%s), ignoring: %m", control_pid
, strna(comm
));
4374 wait_for_exit
= true;
4376 if (r
!= -ESRCH
&& send_sighup
)
4377 (void) kill(control_pid
, SIGHUP
);
4381 if (u
->cgroup_path
&&
4382 (c
->kill_mode
== KILL_CONTROL_GROUP
|| (c
->kill_mode
== KILL_MIXED
&& k
== KILL_KILL
))) {
4383 _cleanup_set_free_ Set
*pid_set
= NULL
;
4385 /* Exclude the main/control pids from being killed via the cgroup */
4386 pid_set
= unit_pid_set(main_pid
, control_pid
);
4390 r
= cg_kill_recursive(SYSTEMD_CGROUP_CONTROLLER
, u
->cgroup_path
,
4392 CGROUP_SIGCONT
|CGROUP_IGNORE_SELF
,
4396 if (!IN_SET(r
, -EAGAIN
, -ESRCH
, -ENOENT
))
4397 log_unit_warning_errno(u
, r
, "Failed to kill control group %s, ignoring: %m", u
->cgroup_path
);
4401 /* FIXME: For now, on the legacy hierarchy, we
4402 * will not wait for the cgroup members to die
4403 * if we are running in a container or if this
4404 * is a delegation unit, simply because cgroup
4405 * notification is unreliable in these
4406 * cases. It doesn't work at all in
4407 * containers, and outside of containers it
4408 * can be confused easily by left-over
4409 * directories in the cgroup — which however
4410 * should not exist in non-delegated units. On
4411 * the unified hierarchy that's different,
4412 * there we get proper events. Hence rely on
4415 if (cg_unified_controller(SYSTEMD_CGROUP_CONTROLLER
) > 0 ||
4416 (detect_container() == 0 && !UNIT_CGROUP_BOOL(u
, delegate
)))
4417 wait_for_exit
= true;
4422 pid_set
= unit_pid_set(main_pid
, control_pid
);
4426 cg_kill_recursive(SYSTEMD_CGROUP_CONTROLLER
, u
->cgroup_path
,
4435 return wait_for_exit
;
4438 int unit_require_mounts_for(Unit
*u
, const char *path
, UnitDependencyMask mask
) {
4439 char prefix
[strlen(path
) + 1], *p
;
4440 UnitDependencyInfo di
;
4446 /* Registers a unit for requiring a certain path and all its prefixes. We keep a hashtable of these paths in
4447 * the unit (from the path to the UnitDependencyInfo structure indicating how to the dependency came to
4448 * be). However, we build a prefix table for all possible prefixes so that new appearing mount units can easily
4449 * determine which units to make themselves a dependency of. */
4451 if (!path_is_absolute(path
))
4454 r
= hashmap_ensure_allocated(&u
->requires_mounts_for
, &string_hash_ops
);
4462 path_kill_slashes(p
);
4464 if (!path_is_safe(p
)) {
4469 if (hashmap_contains(u
->requires_mounts_for
, p
)) {
4474 di
= (UnitDependencyInfo
) {
4478 r
= hashmap_put(u
->requires_mounts_for
, p
, di
.data
);
4484 PATH_FOREACH_PREFIX_MORE(prefix
, p
) {
4487 x
= hashmap_get(u
->manager
->units_requiring_mounts_for
, prefix
);
4491 r
= hashmap_ensure_allocated(&u
->manager
->units_requiring_mounts_for
, &string_hash_ops
);
4505 r
= hashmap_put(u
->manager
->units_requiring_mounts_for
, q
, x
);
4521 int unit_setup_exec_runtime(Unit
*u
) {
4528 offset
= UNIT_VTABLE(u
)->exec_runtime_offset
;
4531 /* Check if there already is an ExecRuntime for this unit? */
4532 rt
= (ExecRuntime
**) ((uint8_t*) u
+ offset
);
4536 /* Try to get it from somebody else */
4537 HASHMAP_FOREACH_KEY(v
, other
, u
->dependencies
[UNIT_JOINS_NAMESPACE_OF
], i
) {
4539 *rt
= unit_get_exec_runtime(other
);
4541 exec_runtime_ref(*rt
);
4546 return exec_runtime_make(rt
, unit_get_exec_context(u
), u
->id
);
4549 int unit_setup_dynamic_creds(Unit
*u
) {
4551 DynamicCreds
*dcreds
;
4556 offset
= UNIT_VTABLE(u
)->dynamic_creds_offset
;
4558 dcreds
= (DynamicCreds
*) ((uint8_t*) u
+ offset
);
4560 ec
= unit_get_exec_context(u
);
4563 if (!ec
->dynamic_user
)
4566 return dynamic_creds_acquire(dcreds
, u
->manager
, ec
->user
, ec
->group
);
4569 bool unit_type_supported(UnitType t
) {
4570 if (_unlikely_(t
< 0))
4572 if (_unlikely_(t
>= _UNIT_TYPE_MAX
))
4575 if (!unit_vtable
[t
]->supported
)
4578 return unit_vtable
[t
]->supported();
4581 void unit_warn_if_dir_nonempty(Unit
*u
, const char* where
) {
4587 r
= dir_is_empty(where
);
4591 log_unit_warning_errno(u
, r
, "Failed to check directory %s: %m", where
);
4595 log_struct(LOG_NOTICE
,
4596 "MESSAGE_ID=" SD_MESSAGE_OVERMOUNTING_STR
,
4598 LOG_UNIT_INVOCATION_ID(u
),
4599 LOG_UNIT_MESSAGE(u
, "Directory %s to mount over is not empty, mounting anyway.", where
),
4604 int unit_fail_if_symlink(Unit
*u
, const char* where
) {
4610 r
= is_symlink(where
);
4612 log_unit_debug_errno(u
, r
, "Failed to check symlink %s, ignoring: %m", where
);
4619 "MESSAGE_ID=" SD_MESSAGE_OVERMOUNTING_STR
,
4621 LOG_UNIT_INVOCATION_ID(u
),
4622 LOG_UNIT_MESSAGE(u
, "Mount on symlink %s not allowed.", where
),
4629 bool unit_is_pristine(Unit
*u
) {
4632 /* Check if the unit already exists or is already around,
4633 * in a number of different ways. Note that to cater for unit
4634 * types such as slice, we are generally fine with units that
4635 * are marked UNIT_LOADED even though nothing was
4636 * actually loaded, as those unit types don't require a file
4637 * on disk to validly load. */
4639 return !(!IN_SET(u
->load_state
, UNIT_NOT_FOUND
, UNIT_LOADED
) ||
4642 !strv_isempty(u
->dropin_paths
) ||
4647 pid_t
unit_control_pid(Unit
*u
) {
4650 if (UNIT_VTABLE(u
)->control_pid
)
4651 return UNIT_VTABLE(u
)->control_pid(u
);
4656 pid_t
unit_main_pid(Unit
*u
) {
4659 if (UNIT_VTABLE(u
)->main_pid
)
4660 return UNIT_VTABLE(u
)->main_pid(u
);
4665 static void unit_unref_uid_internal(
4669 void (*_manager_unref_uid
)(Manager
*m
, uid_t uid
, bool destroy_now
)) {
4673 assert(_manager_unref_uid
);
4675 /* Generic implementation of both unit_unref_uid() and unit_unref_gid(), under the assumption that uid_t and
4676 * gid_t are actually the same time, with the same validity rules.
4678 * Drops a reference to UID/GID from a unit. */
4680 assert_cc(sizeof(uid_t
) == sizeof(gid_t
));
4681 assert_cc(UID_INVALID
== (uid_t
) GID_INVALID
);
4683 if (!uid_is_valid(*ref_uid
))
4686 _manager_unref_uid(u
->manager
, *ref_uid
, destroy_now
);
4687 *ref_uid
= UID_INVALID
;
4690 void unit_unref_uid(Unit
*u
, bool destroy_now
) {
4691 unit_unref_uid_internal(u
, &u
->ref_uid
, destroy_now
, manager_unref_uid
);
4694 void unit_unref_gid(Unit
*u
, bool destroy_now
) {
4695 unit_unref_uid_internal(u
, (uid_t
*) &u
->ref_gid
, destroy_now
, manager_unref_gid
);
4698 static int unit_ref_uid_internal(
4703 int (*_manager_ref_uid
)(Manager
*m
, uid_t uid
, bool clean_ipc
)) {
4709 assert(uid_is_valid(uid
));
4710 assert(_manager_ref_uid
);
4712 /* Generic implementation of both unit_ref_uid() and unit_ref_guid(), under the assumption that uid_t and gid_t
4713 * are actually the same type, and have the same validity rules.
4715 * Adds a reference on a specific UID/GID to this unit. Each unit referencing the same UID/GID maintains a
4716 * reference so that we can destroy the UID/GID's IPC resources as soon as this is requested and the counter
4719 assert_cc(sizeof(uid_t
) == sizeof(gid_t
));
4720 assert_cc(UID_INVALID
== (uid_t
) GID_INVALID
);
4722 if (*ref_uid
== uid
)
4725 if (uid_is_valid(*ref_uid
)) /* Already set? */
4728 r
= _manager_ref_uid(u
->manager
, uid
, clean_ipc
);
4736 int unit_ref_uid(Unit
*u
, uid_t uid
, bool clean_ipc
) {
4737 return unit_ref_uid_internal(u
, &u
->ref_uid
, uid
, clean_ipc
, manager_ref_uid
);
4740 int unit_ref_gid(Unit
*u
, gid_t gid
, bool clean_ipc
) {
4741 return unit_ref_uid_internal(u
, (uid_t
*) &u
->ref_gid
, (uid_t
) gid
, clean_ipc
, manager_ref_gid
);
4744 static int unit_ref_uid_gid_internal(Unit
*u
, uid_t uid
, gid_t gid
, bool clean_ipc
) {
4749 /* Reference both a UID and a GID in one go. Either references both, or neither. */
4751 if (uid_is_valid(uid
)) {
4752 r
= unit_ref_uid(u
, uid
, clean_ipc
);
4757 if (gid_is_valid(gid
)) {
4758 q
= unit_ref_gid(u
, gid
, clean_ipc
);
4761 unit_unref_uid(u
, false);
4767 return r
> 0 || q
> 0;
4770 int unit_ref_uid_gid(Unit
*u
, uid_t uid
, gid_t gid
) {
4776 c
= unit_get_exec_context(u
);
4778 r
= unit_ref_uid_gid_internal(u
, uid
, gid
, c
? c
->remove_ipc
: false);
4780 return log_unit_warning_errno(u
, r
, "Couldn't add UID/GID reference to unit, proceeding without: %m");
4785 void unit_unref_uid_gid(Unit
*u
, bool destroy_now
) {
4788 unit_unref_uid(u
, destroy_now
);
4789 unit_unref_gid(u
, destroy_now
);
4792 void unit_notify_user_lookup(Unit
*u
, uid_t uid
, gid_t gid
) {
4797 /* This is invoked whenever one of the forked off processes let's us know the UID/GID its user name/group names
4798 * resolved to. We keep track of which UID/GID is currently assigned in order to be able to destroy its IPC
4799 * objects when no service references the UID/GID anymore. */
4801 r
= unit_ref_uid_gid(u
, uid
, gid
);
4803 bus_unit_send_change_signal(u
);
4806 int unit_set_invocation_id(Unit
*u
, sd_id128_t id
) {
4811 /* Set the invocation ID for this unit. If we cannot, this will not roll back, but reset the whole thing. */
4813 if (sd_id128_equal(u
->invocation_id
, id
))
4816 if (!sd_id128_is_null(u
->invocation_id
))
4817 (void) hashmap_remove_value(u
->manager
->units_by_invocation_id
, &u
->invocation_id
, u
);
4819 if (sd_id128_is_null(id
)) {
4824 r
= hashmap_ensure_allocated(&u
->manager
->units_by_invocation_id
, &id128_hash_ops
);
4828 u
->invocation_id
= id
;
4829 sd_id128_to_string(id
, u
->invocation_id_string
);
4831 r
= hashmap_put(u
->manager
->units_by_invocation_id
, &u
->invocation_id
, u
);
4838 u
->invocation_id
= SD_ID128_NULL
;
4839 u
->invocation_id_string
[0] = 0;
4843 int unit_acquire_invocation_id(Unit
*u
) {
4849 r
= sd_id128_randomize(&id
);
4851 return log_unit_error_errno(u
, r
, "Failed to generate invocation ID for unit: %m");
4853 r
= unit_set_invocation_id(u
, id
);
4855 return log_unit_error_errno(u
, r
, "Failed to set invocation ID for unit: %m");
4860 void unit_set_exec_params(Unit
*u
, ExecParameters
*p
) {
4864 p
->cgroup_path
= u
->cgroup_path
;
4865 SET_FLAG(p
->flags
, EXEC_CGROUP_DELEGATE
, UNIT_CGROUP_BOOL(u
, delegate
));
4868 int unit_fork_helper_process(Unit
*u
, pid_t
*ret
) {
4875 /* Forks off a helper process and makes sure it is a member of the unit's cgroup. Returns == 0 in the child,
4876 * and > 0 in the parent. The pid parameter is always filled in with the child's PID. */
4878 (void) unit_realize_cgroup(u
);
4886 (void) default_signals(SIGNALS_CRASH_HANDLER
, SIGNALS_IGNORE
, -1);
4887 (void) ignore_signals(SIGPIPE
, -1);
4892 if (u
->cgroup_path
) {
4893 r
= cg_attach_everywhere(u
->manager
->cgroup_supported
, u
->cgroup_path
, 0, NULL
, NULL
);
4895 log_unit_error_errno(u
, r
, "Failed to join unit cgroup %s: %m", u
->cgroup_path
);
4900 *ret
= getpid_cached();
4908 static void unit_update_dependency_mask(Unit
*u
, UnitDependency d
, Unit
*other
, UnitDependencyInfo di
) {
4911 assert(d
< _UNIT_DEPENDENCY_MAX
);
4914 if (di
.origin_mask
== 0 && di
.destination_mask
== 0) {
4915 /* No bit set anymore, let's drop the whole entry */
4916 assert_se(hashmap_remove(u
->dependencies
[d
], other
));
4917 log_unit_debug(u
, "%s lost dependency %s=%s", u
->id
, unit_dependency_to_string(d
), other
->id
);
4919 /* Mask was reduced, let's update the entry */
4920 assert_se(hashmap_update(u
->dependencies
[d
], other
, di
.data
) == 0);
4923 void unit_remove_dependencies(Unit
*u
, UnitDependencyMask mask
) {
4928 /* Removes all dependencies u has on other units marked for ownership by 'mask'. */
4933 for (d
= 0; d
< _UNIT_DEPENDENCY_MAX
; d
++) {
4937 UnitDependencyInfo di
;
4943 HASHMAP_FOREACH_KEY(di
.data
, other
, u
->dependencies
[d
], i
) {
4946 if ((di
.origin_mask
& ~mask
) == di
.origin_mask
)
4948 di
.origin_mask
&= ~mask
;
4949 unit_update_dependency_mask(u
, d
, other
, di
);
4951 /* We updated the dependency from our unit to the other unit now. But most dependencies
4952 * imply a reverse dependency. Hence, let's delete that one too. For that we go through
4953 * all dependency types on the other unit and delete all those which point to us and
4954 * have the right mask set. */
4956 for (q
= 0; q
< _UNIT_DEPENDENCY_MAX
; q
++) {
4957 UnitDependencyInfo dj
;
4959 dj
.data
= hashmap_get(other
->dependencies
[q
], u
);
4960 if ((dj
.destination_mask
& ~mask
) == dj
.destination_mask
)
4962 dj
.destination_mask
&= ~mask
;
4964 unit_update_dependency_mask(other
, q
, u
, dj
);
4967 unit_add_to_gc_queue(other
);
4977 static int unit_export_invocation_id(Unit
*u
) {
4983 if (u
->exported_invocation_id
)
4986 if (sd_id128_is_null(u
->invocation_id
))
4989 p
= strjoina("/run/systemd/units/invocation:", u
->id
);
4990 r
= symlink_atomic(u
->invocation_id_string
, p
);
4992 return log_unit_debug_errno(u
, r
, "Failed to create invocation ID symlink %s: %m", p
);
4994 u
->exported_invocation_id
= true;
4998 static int unit_export_log_level_max(Unit
*u
, const ExecContext
*c
) {
5006 if (u
->exported_log_level_max
)
5009 if (c
->log_level_max
< 0)
5012 assert(c
->log_level_max
<= 7);
5014 buf
[0] = '0' + c
->log_level_max
;
5017 p
= strjoina("/run/systemd/units/log-level-max:", u
->id
);
5018 r
= symlink_atomic(buf
, p
);
5020 return log_unit_debug_errno(u
, r
, "Failed to create maximum log level symlink %s: %m", p
);
5022 u
->exported_log_level_max
= true;
5026 static int unit_export_log_extra_fields(Unit
*u
, const ExecContext
*c
) {
5027 _cleanup_close_
int fd
= -1;
5028 struct iovec
*iovec
;
5036 if (u
->exported_log_extra_fields
)
5039 if (c
->n_log_extra_fields
<= 0)
5042 sizes
= newa(le64_t
, c
->n_log_extra_fields
);
5043 iovec
= newa(struct iovec
, c
->n_log_extra_fields
* 2);
5045 for (i
= 0; i
< c
->n_log_extra_fields
; i
++) {
5046 sizes
[i
] = htole64(c
->log_extra_fields
[i
].iov_len
);
5048 iovec
[i
*2] = IOVEC_MAKE(sizes
+ i
, sizeof(le64_t
));
5049 iovec
[i
*2+1] = c
->log_extra_fields
[i
];
5052 p
= strjoina("/run/systemd/units/log-extra-fields:", u
->id
);
5053 pattern
= strjoina(p
, ".XXXXXX");
5055 fd
= mkostemp_safe(pattern
);
5057 return log_unit_debug_errno(u
, fd
, "Failed to create extra fields file %s: %m", p
);
5059 n
= writev(fd
, iovec
, c
->n_log_extra_fields
*2);
5061 r
= log_unit_debug_errno(u
, errno
, "Failed to write extra fields: %m");
5065 (void) fchmod(fd
, 0644);
5067 if (rename(pattern
, p
) < 0) {
5068 r
= log_unit_debug_errno(u
, errno
, "Failed to rename extra fields file: %m");
5072 u
->exported_log_extra_fields
= true;
5076 (void) unlink(pattern
);
5080 void unit_export_state_files(Unit
*u
) {
5081 const ExecContext
*c
;
5088 if (!MANAGER_IS_SYSTEM(u
->manager
))
5091 /* Exports a couple of unit properties to /run/systemd/units/, so that journald can quickly query this data
5092 * from there. Ideally, journald would use IPC to query this, like everybody else, but that's hard, as long as
5093 * the IPC system itself and PID 1 also log to the journal.
5095 * Note that these files really shouldn't be considered API for anyone else, as use a runtime file system as
5096 * IPC replacement is not compatible with today's world of file system namespaces. However, this doesn't really
5097 * apply to communication between the journal and systemd, as we assume that these two daemons live in the same
5098 * namespace at least.
5100 * Note that some of the "files" exported here are actually symlinks and not regular files. Symlinks work
5101 * better for storing small bits of data, in particular as we can write them with two system calls, and read
5104 (void) unit_export_invocation_id(u
);
5106 c
= unit_get_exec_context(u
);
5108 (void) unit_export_log_level_max(u
, c
);
5109 (void) unit_export_log_extra_fields(u
, c
);
5113 void unit_unlink_state_files(Unit
*u
) {
5121 if (!MANAGER_IS_SYSTEM(u
->manager
))
5124 /* Undoes the effect of unit_export_state() */
5126 if (u
->exported_invocation_id
) {
5127 p
= strjoina("/run/systemd/units/invocation:", u
->id
);
5130 u
->exported_invocation_id
= false;
5133 if (u
->exported_log_level_max
) {
5134 p
= strjoina("/run/systemd/units/log-level-max:", u
->id
);
5137 u
->exported_log_level_max
= false;
5140 if (u
->exported_log_extra_fields
) {
5141 p
= strjoina("/run/systemd/units/extra-fields:", u
->id
);
5144 u
->exported_log_extra_fields
= false;
5148 static const char* const collect_mode_table
[_COLLECT_MODE_MAX
] = {
5149 [COLLECT_INACTIVE
] = "inactive",
5150 [COLLECT_INACTIVE_OR_FAILED
] = "inactive-or-failed",
5153 DEFINE_STRING_TABLE_LOOKUP(collect_mode
, CollectMode
);