1 /* SPDX-License-Identifier: LGPL-2.1+ */
9 #include "sd-messages.h"
11 #include "all-units.h"
12 #include "alloc-util.h"
13 #include "bpf-firewall.h"
14 #include "bus-common-errors.h"
16 #include "cgroup-setup.h"
17 #include "cgroup-util.h"
18 #include "dbus-unit.h"
24 #include "fileio-label.h"
26 #include "format-util.h"
28 #include "id128-util.h"
31 #include "load-dropin.h"
32 #include "load-fragment.h"
35 #include "missing_audit.h"
37 #include "parse-util.h"
38 #include "path-util.h"
39 #include "process-util.h"
41 #include "serialize.h"
43 #include "signal-util.h"
44 #include "sparse-endian.h"
46 #include "specifier.h"
47 #include "stat-util.h"
48 #include "stdio-util.h"
49 #include "string-table.h"
50 #include "string-util.h"
52 #include "terminal-util.h"
53 #include "tmpfile-util.h"
54 #include "umask-util.h"
55 #include "unit-name.h"
57 #include "user-util.h"
60 /* Thresholds for logging at INFO level about resource consumption */
61 #define MENTIONWORTHY_CPU_NSEC (1 * NSEC_PER_SEC)
62 #define MENTIONWORTHY_IO_BYTES (1024 * 1024ULL)
63 #define MENTIONWORTHY_IP_BYTES (0ULL)
65 /* Thresholds for logging at INFO level about resource consumption */
66 #define NOTICEWORTHY_CPU_NSEC (10*60 * NSEC_PER_SEC) /* 10 minutes */
67 #define NOTICEWORTHY_IO_BYTES (10 * 1024 * 1024ULL) /* 10 MB */
68 #define NOTICEWORTHY_IP_BYTES (128 * 1024 * 1024ULL) /* 128 MB */
70 const UnitVTable
* const unit_vtable
[_UNIT_TYPE_MAX
] = {
71 [UNIT_SERVICE
] = &service_vtable
,
72 [UNIT_SOCKET
] = &socket_vtable
,
73 [UNIT_TARGET
] = &target_vtable
,
74 [UNIT_DEVICE
] = &device_vtable
,
75 [UNIT_MOUNT
] = &mount_vtable
,
76 [UNIT_AUTOMOUNT
] = &automount_vtable
,
77 [UNIT_SWAP
] = &swap_vtable
,
78 [UNIT_TIMER
] = &timer_vtable
,
79 [UNIT_PATH
] = &path_vtable
,
80 [UNIT_SLICE
] = &slice_vtable
,
81 [UNIT_SCOPE
] = &scope_vtable
,
84 static void maybe_warn_about_dependency(Unit
*u
, const char *other
, UnitDependency dependency
);
86 Unit
*unit_new(Manager
*m
, size_t size
) {
90 assert(size
>= sizeof(Unit
));
96 u
->names
= set_new(&string_hash_ops
);
101 u
->type
= _UNIT_TYPE_INVALID
;
102 u
->default_dependencies
= true;
103 u
->unit_file_state
= _UNIT_FILE_STATE_INVALID
;
104 u
->unit_file_preset
= -1;
105 u
->on_failure_job_mode
= JOB_REPLACE
;
106 u
->cgroup_control_inotify_wd
= -1;
107 u
->cgroup_memory_inotify_wd
= -1;
108 u
->job_timeout
= USEC_INFINITY
;
109 u
->job_running_timeout
= USEC_INFINITY
;
110 u
->ref_uid
= UID_INVALID
;
111 u
->ref_gid
= GID_INVALID
;
112 u
->cpu_usage_last
= NSEC_INFINITY
;
113 u
->cgroup_invalidated_mask
|= CGROUP_MASK_BPF_FIREWALL
;
114 u
->failure_action_exit_status
= u
->success_action_exit_status
= -1;
116 u
->ip_accounting_ingress_map_fd
= -1;
117 u
->ip_accounting_egress_map_fd
= -1;
118 u
->ipv4_allow_map_fd
= -1;
119 u
->ipv6_allow_map_fd
= -1;
120 u
->ipv4_deny_map_fd
= -1;
121 u
->ipv6_deny_map_fd
= -1;
123 u
->last_section_private
= -1;
125 u
->start_ratelimit
= (RateLimit
) { m
->default_start_limit_interval
, m
->default_start_limit_burst
};
126 u
->auto_stop_ratelimit
= (RateLimit
) { 10 * USEC_PER_SEC
, 16 };
128 for (CGroupIOAccountingMetric i
= 0; i
< _CGROUP_IO_ACCOUNTING_METRIC_MAX
; i
++)
129 u
->io_accounting_last
[i
] = UINT64_MAX
;
134 int unit_new_for_name(Manager
*m
, size_t size
, const char *name
, Unit
**ret
) {
135 _cleanup_(unit_freep
) Unit
*u
= NULL
;
138 u
= unit_new(m
, size
);
142 r
= unit_add_name(u
, name
);
151 bool unit_has_name(const Unit
*u
, const char *name
) {
155 return set_contains(u
->names
, (char*) name
);
158 static void unit_init(Unit
*u
) {
165 assert(u
->type
>= 0);
167 cc
= unit_get_cgroup_context(u
);
169 cgroup_context_init(cc
);
171 /* Copy in the manager defaults into the cgroup
172 * context, _before_ the rest of the settings have
173 * been initialized */
175 cc
->cpu_accounting
= u
->manager
->default_cpu_accounting
;
176 cc
->io_accounting
= u
->manager
->default_io_accounting
;
177 cc
->blockio_accounting
= u
->manager
->default_blockio_accounting
;
178 cc
->memory_accounting
= u
->manager
->default_memory_accounting
;
179 cc
->tasks_accounting
= u
->manager
->default_tasks_accounting
;
180 cc
->ip_accounting
= u
->manager
->default_ip_accounting
;
182 if (u
->type
!= UNIT_SLICE
)
183 cc
->tasks_max
= u
->manager
->default_tasks_max
;
186 ec
= unit_get_exec_context(u
);
188 exec_context_init(ec
);
190 if (MANAGER_IS_SYSTEM(u
->manager
))
191 ec
->keyring_mode
= EXEC_KEYRING_SHARED
;
193 ec
->keyring_mode
= EXEC_KEYRING_INHERIT
;
195 /* User manager might have its umask redefined by PAM or UMask=. In this
196 * case let the units it manages inherit this value by default. They can
197 * still tune this value through their own unit file */
198 (void) get_process_umask(getpid_cached(), &ec
->umask
);
202 kc
= unit_get_kill_context(u
);
204 kill_context_init(kc
);
206 if (UNIT_VTABLE(u
)->init
)
207 UNIT_VTABLE(u
)->init(u
);
210 int unit_add_name(Unit
*u
, const char *text
) {
211 _cleanup_free_
char *s
= NULL
, *i
= NULL
;
218 if (unit_name_is_valid(text
, UNIT_NAME_TEMPLATE
)) {
221 return log_unit_debug_errno(u
, SYNTHETIC_ERRNO(EINVAL
),
222 "instance is not set when adding name '%s': %m", text
);
224 r
= unit_name_replace_instance(text
, u
->instance
, &s
);
226 return log_unit_debug_errno(u
, r
,
227 "failed to build instance name from '%s': %m", text
);
234 if (set_contains(u
->names
, s
))
236 if (hashmap_contains(u
->manager
->units
, s
))
237 return log_unit_debug_errno(u
, SYNTHETIC_ERRNO(EEXIST
),
238 "unit already exist when adding name '%s': %m", text
);
240 if (!unit_name_is_valid(s
, UNIT_NAME_PLAIN
|UNIT_NAME_INSTANCE
))
241 return log_unit_debug_errno(u
, SYNTHETIC_ERRNO(EINVAL
),
242 "name '%s' is invalid: %m", text
);
244 t
= unit_name_to_type(s
);
246 return log_unit_debug_errno(u
, SYNTHETIC_ERRNO(EINVAL
),
247 "failed to to derive unit type from name '%s': %m", text
);
249 if (u
->type
!= _UNIT_TYPE_INVALID
&& t
!= u
->type
)
250 return log_unit_debug_errno(u
, SYNTHETIC_ERRNO(EINVAL
),
251 "unit type is illegal: u->type(%d) and t(%d) for name '%s': %m",
254 r
= unit_name_to_instance(s
, &i
);
256 return log_unit_debug_errno(u
, r
, "failed to extract instance from name '%s': %m", text
);
258 if (i
&& !unit_type_may_template(t
))
259 return log_unit_debug_errno(u
, SYNTHETIC_ERRNO(EINVAL
), "templates are not allowed for name '%s': %m", text
);
261 /* Ensure that this unit is either instanced or not instanced,
262 * but not both. Note that we do allow names with different
263 * instance names however! */
264 if (u
->type
!= _UNIT_TYPE_INVALID
&& !u
->instance
!= !i
)
265 return log_unit_debug_errno(u
, SYNTHETIC_ERRNO(EINVAL
),
266 "instance is illegal: u->type(%d), u->instance(%s) and i(%s) for name '%s': %m",
267 u
->type
, u
->instance
, i
, text
);
269 if (!unit_type_may_alias(t
) && !set_isempty(u
->names
))
270 return log_unit_debug_errno(u
, SYNTHETIC_ERRNO(EEXIST
), "symlinks are not allowed for name '%s': %m", text
);
272 if (hashmap_size(u
->manager
->units
) >= MANAGER_MAX_NAMES
)
273 return log_unit_debug_errno(u
, SYNTHETIC_ERRNO(E2BIG
), "too many units: %m");
275 r
= set_put(u
->names
, s
);
280 r
= hashmap_put(u
->manager
->units
, s
, u
);
282 (void) set_remove(u
->names
, s
);
283 return log_unit_debug_errno(u
, r
, "add unit to hashmap failed for name '%s': %m", text
);
286 if (u
->type
== _UNIT_TYPE_INVALID
) {
289 u
->instance
= TAKE_PTR(i
);
291 LIST_PREPEND(units_by_type
, u
->manager
->units_by_type
[t
], u
);
298 unit_add_to_dbus_queue(u
);
302 int unit_choose_id(Unit
*u
, const char *name
) {
303 _cleanup_free_
char *t
= NULL
;
310 if (unit_name_is_valid(name
, UNIT_NAME_TEMPLATE
)) {
315 r
= unit_name_replace_instance(name
, u
->instance
, &t
);
322 /* Selects one of the names of this unit as the id */
323 s
= set_get(u
->names
, (char*) name
);
327 /* Determine the new instance from the new id */
328 r
= unit_name_to_instance(s
, &i
);
337 unit_add_to_dbus_queue(u
);
342 int unit_set_description(Unit
*u
, const char *description
) {
347 r
= free_and_strdup(&u
->description
, empty_to_null(description
));
351 unit_add_to_dbus_queue(u
);
356 bool unit_may_gc(Unit
*u
) {
357 UnitActiveState state
;
362 /* Checks whether the unit is ready to be unloaded for garbage collection.
363 * Returns true when the unit may be collected, and false if there's some
364 * reason to keep it loaded.
366 * References from other units are *not* checked here. Instead, this is done
367 * in unit_gc_sweep(), but using markers to properly collect dependency loops.
376 state
= unit_active_state(u
);
378 /* If the unit is inactive and failed and no job is queued for it, then release its runtime resources */
379 if (UNIT_IS_INACTIVE_OR_FAILED(state
) &&
380 UNIT_VTABLE(u
)->release_resources
)
381 UNIT_VTABLE(u
)->release_resources(u
);
386 if (sd_bus_track_count(u
->bus_track
) > 0)
389 /* But we keep the unit object around for longer when it is referenced or configured to not be gc'ed */
390 switch (u
->collect_mode
) {
392 case COLLECT_INACTIVE
:
393 if (state
!= UNIT_INACTIVE
)
398 case COLLECT_INACTIVE_OR_FAILED
:
399 if (!IN_SET(state
, UNIT_INACTIVE
, UNIT_FAILED
))
405 assert_not_reached("Unknown garbage collection mode");
408 if (u
->cgroup_path
) {
409 /* If the unit has a cgroup, then check whether there's anything in it. If so, we should stay
410 * around. Units with active processes should never be collected. */
412 r
= cg_is_empty_recursive(SYSTEMD_CGROUP_CONTROLLER
, u
->cgroup_path
);
414 log_unit_debug_errno(u
, r
, "Failed to determine whether cgroup %s is empty: %m", u
->cgroup_path
);
419 if (UNIT_VTABLE(u
)->may_gc
&& !UNIT_VTABLE(u
)->may_gc(u
))
425 void unit_add_to_load_queue(Unit
*u
) {
427 assert(u
->type
!= _UNIT_TYPE_INVALID
);
429 if (u
->load_state
!= UNIT_STUB
|| u
->in_load_queue
)
432 LIST_PREPEND(load_queue
, u
->manager
->load_queue
, u
);
433 u
->in_load_queue
= true;
436 void unit_add_to_cleanup_queue(Unit
*u
) {
439 if (u
->in_cleanup_queue
)
442 LIST_PREPEND(cleanup_queue
, u
->manager
->cleanup_queue
, u
);
443 u
->in_cleanup_queue
= true;
446 void unit_add_to_gc_queue(Unit
*u
) {
449 if (u
->in_gc_queue
|| u
->in_cleanup_queue
)
455 LIST_PREPEND(gc_queue
, u
->manager
->gc_unit_queue
, u
);
456 u
->in_gc_queue
= true;
459 void unit_add_to_dbus_queue(Unit
*u
) {
461 assert(u
->type
!= _UNIT_TYPE_INVALID
);
463 if (u
->load_state
== UNIT_STUB
|| u
->in_dbus_queue
)
466 /* Shortcut things if nobody cares */
467 if (sd_bus_track_count(u
->manager
->subscribed
) <= 0 &&
468 sd_bus_track_count(u
->bus_track
) <= 0 &&
469 set_isempty(u
->manager
->private_buses
)) {
470 u
->sent_dbus_new_signal
= true;
474 LIST_PREPEND(dbus_queue
, u
->manager
->dbus_unit_queue
, u
);
475 u
->in_dbus_queue
= true;
478 void unit_submit_to_stop_when_unneeded_queue(Unit
*u
) {
481 if (u
->in_stop_when_unneeded_queue
)
484 if (!u
->stop_when_unneeded
)
487 if (!UNIT_IS_ACTIVE_OR_RELOADING(unit_active_state(u
)))
490 LIST_PREPEND(stop_when_unneeded_queue
, u
->manager
->stop_when_unneeded_queue
, u
);
491 u
->in_stop_when_unneeded_queue
= true;
494 static void bidi_set_free(Unit
*u
, Hashmap
*h
) {
501 /* Frees the hashmap and makes sure we are dropped from the inverse pointers */
503 HASHMAP_FOREACH_KEY(v
, other
, h
, i
) {
506 for (d
= 0; d
< _UNIT_DEPENDENCY_MAX
; d
++)
507 hashmap_remove(other
->dependencies
[d
], u
);
509 unit_add_to_gc_queue(other
);
515 static void unit_remove_transient(Unit
*u
) {
523 if (u
->fragment_path
)
524 (void) unlink(u
->fragment_path
);
526 STRV_FOREACH(i
, u
->dropin_paths
) {
527 _cleanup_free_
char *p
= NULL
, *pp
= NULL
;
529 p
= dirname_malloc(*i
); /* Get the drop-in directory from the drop-in file */
533 pp
= dirname_malloc(p
); /* Get the config directory from the drop-in directory */
537 /* Only drop transient drop-ins */
538 if (!path_equal(u
->manager
->lookup_paths
.transient
, pp
))
546 static void unit_free_requires_mounts_for(Unit
*u
) {
550 _cleanup_free_
char *path
;
552 path
= hashmap_steal_first_key(u
->requires_mounts_for
);
556 char s
[strlen(path
) + 1];
558 PATH_FOREACH_PREFIX_MORE(s
, path
) {
562 x
= hashmap_get2(u
->manager
->units_requiring_mounts_for
, s
, (void**) &y
);
566 (void) set_remove(x
, u
);
568 if (set_isempty(x
)) {
569 (void) hashmap_remove(u
->manager
->units_requiring_mounts_for
, y
);
577 u
->requires_mounts_for
= hashmap_free(u
->requires_mounts_for
);
580 static void unit_done(Unit
*u
) {
589 if (UNIT_VTABLE(u
)->done
)
590 UNIT_VTABLE(u
)->done(u
);
592 ec
= unit_get_exec_context(u
);
594 exec_context_done(ec
);
596 cc
= unit_get_cgroup_context(u
);
598 cgroup_context_done(cc
);
601 void unit_free(Unit
*u
) {
609 if (UNIT_ISSET(u
->slice
)) {
610 /* A unit is being dropped from the tree, make sure our parent slice recalculates the member mask */
611 unit_invalidate_cgroup_members_masks(UNIT_DEREF(u
->slice
));
613 /* And make sure the parent is realized again, updating cgroup memberships */
614 unit_add_to_cgroup_realize_queue(UNIT_DEREF(u
->slice
));
617 u
->transient_file
= safe_fclose(u
->transient_file
);
619 if (!MANAGER_IS_RELOADING(u
->manager
))
620 unit_remove_transient(u
);
622 bus_unit_send_removed_signal(u
);
626 unit_dequeue_rewatch_pids(u
);
628 sd_bus_slot_unref(u
->match_bus_slot
);
629 sd_bus_track_unref(u
->bus_track
);
630 u
->deserialized_refs
= strv_free(u
->deserialized_refs
);
631 u
->pending_freezer_message
= sd_bus_message_unref(u
->pending_freezer_message
);
633 unit_free_requires_mounts_for(u
);
635 SET_FOREACH(t
, u
->names
, i
)
636 hashmap_remove_value(u
->manager
->units
, t
, u
);
638 if (!sd_id128_is_null(u
->invocation_id
))
639 hashmap_remove_value(u
->manager
->units_by_invocation_id
, &u
->invocation_id
, u
);
653 for (d
= 0; d
< _UNIT_DEPENDENCY_MAX
; d
++)
654 bidi_set_free(u
, u
->dependencies
[d
]);
657 manager_unref_console(u
->manager
);
659 unit_release_cgroup(u
);
661 if (!MANAGER_IS_RELOADING(u
->manager
))
662 unit_unlink_state_files(u
);
664 unit_unref_uid_gid(u
, false);
666 (void) manager_update_failed_units(u
->manager
, u
, false);
667 set_remove(u
->manager
->startup_units
, u
);
669 unit_unwatch_all_pids(u
);
671 unit_ref_unset(&u
->slice
);
672 while (u
->refs_by_target
)
673 unit_ref_unset(u
->refs_by_target
);
675 if (u
->type
!= _UNIT_TYPE_INVALID
)
676 LIST_REMOVE(units_by_type
, u
->manager
->units_by_type
[u
->type
], u
);
678 if (u
->in_load_queue
)
679 LIST_REMOVE(load_queue
, u
->manager
->load_queue
, u
);
681 if (u
->in_dbus_queue
)
682 LIST_REMOVE(dbus_queue
, u
->manager
->dbus_unit_queue
, u
);
685 LIST_REMOVE(gc_queue
, u
->manager
->gc_unit_queue
, u
);
687 if (u
->in_cgroup_realize_queue
)
688 LIST_REMOVE(cgroup_realize_queue
, u
->manager
->cgroup_realize_queue
, u
);
690 if (u
->in_cgroup_empty_queue
)
691 LIST_REMOVE(cgroup_empty_queue
, u
->manager
->cgroup_empty_queue
, u
);
693 if (u
->in_cleanup_queue
)
694 LIST_REMOVE(cleanup_queue
, u
->manager
->cleanup_queue
, u
);
696 if (u
->in_target_deps_queue
)
697 LIST_REMOVE(target_deps_queue
, u
->manager
->target_deps_queue
, u
);
699 if (u
->in_stop_when_unneeded_queue
)
700 LIST_REMOVE(stop_when_unneeded_queue
, u
->manager
->stop_when_unneeded_queue
, u
);
702 safe_close(u
->ip_accounting_ingress_map_fd
);
703 safe_close(u
->ip_accounting_egress_map_fd
);
705 safe_close(u
->ipv4_allow_map_fd
);
706 safe_close(u
->ipv6_allow_map_fd
);
707 safe_close(u
->ipv4_deny_map_fd
);
708 safe_close(u
->ipv6_deny_map_fd
);
710 bpf_program_unref(u
->ip_bpf_ingress
);
711 bpf_program_unref(u
->ip_bpf_ingress_installed
);
712 bpf_program_unref(u
->ip_bpf_egress
);
713 bpf_program_unref(u
->ip_bpf_egress_installed
);
715 set_free(u
->ip_bpf_custom_ingress
);
716 set_free(u
->ip_bpf_custom_egress
);
717 set_free(u
->ip_bpf_custom_ingress_installed
);
718 set_free(u
->ip_bpf_custom_egress_installed
);
720 bpf_program_unref(u
->bpf_device_control_installed
);
722 condition_free_list(u
->conditions
);
723 condition_free_list(u
->asserts
);
725 free(u
->description
);
726 strv_free(u
->documentation
);
727 free(u
->fragment_path
);
728 free(u
->source_path
);
729 strv_free(u
->dropin_paths
);
732 free(u
->job_timeout_reboot_arg
);
734 set_free_free(u
->names
);
741 FreezerState
unit_freezer_state(Unit
*u
) {
744 return u
->freezer_state
;
747 int unit_freezer_state_kernel(Unit
*u
, FreezerState
*ret
) {
748 char *values
[1] = {};
753 r
= cg_get_keyed_attribute(SYSTEMD_CGROUP_CONTROLLER
, u
->cgroup_path
, "cgroup.events",
754 STRV_MAKE("frozen"), values
);
758 r
= _FREEZER_STATE_INVALID
;
761 if (streq(values
[0], "0"))
763 else if (streq(values
[0], "1"))
773 UnitActiveState
unit_active_state(Unit
*u
) {
776 if (u
->load_state
== UNIT_MERGED
)
777 return unit_active_state(unit_follow_merge(u
));
779 /* After a reload it might happen that a unit is not correctly
780 * loaded but still has a process around. That's why we won't
781 * shortcut failed loading to UNIT_INACTIVE_FAILED. */
783 return UNIT_VTABLE(u
)->active_state(u
);
786 const char* unit_sub_state_to_string(Unit
*u
) {
789 return UNIT_VTABLE(u
)->sub_state_to_string(u
);
792 static int set_complete_move(Set
**s
, Set
**other
) {
800 return set_move(*s
, *other
);
802 *s
= TAKE_PTR(*other
);
807 static int hashmap_complete_move(Hashmap
**s
, Hashmap
**other
) {
815 return hashmap_move(*s
, *other
);
817 *s
= TAKE_PTR(*other
);
822 static int merge_names(Unit
*u
, Unit
*other
) {
830 r
= set_complete_move(&u
->names
, &other
->names
);
834 set_free_free(other
->names
);
838 SET_FOREACH(t
, u
->names
, i
)
839 assert_se(hashmap_replace(u
->manager
->units
, t
, u
) == 0);
844 static int reserve_dependencies(Unit
*u
, Unit
*other
, UnitDependency d
) {
849 assert(d
< _UNIT_DEPENDENCY_MAX
);
852 * If u does not have this dependency set allocated, there is no need
853 * to reserve anything. In that case other's set will be transferred
854 * as a whole to u by complete_move().
856 if (!u
->dependencies
[d
])
859 /* merge_dependencies() will skip a u-on-u dependency */
860 n_reserve
= hashmap_size(other
->dependencies
[d
]) - !!hashmap_get(other
->dependencies
[d
], u
);
862 return hashmap_reserve(u
->dependencies
[d
], n_reserve
);
865 static void merge_dependencies(Unit
*u
, Unit
*other
, const char *other_id
, UnitDependency d
) {
871 /* Merges all dependencies of type 'd' of the unit 'other' into the deps of the unit 'u' */
875 assert(d
< _UNIT_DEPENDENCY_MAX
);
877 /* Fix backwards pointers. Let's iterate through all dependent units of the other unit. */
878 HASHMAP_FOREACH_KEY(v
, back
, other
->dependencies
[d
], i
) {
881 /* Let's now iterate through the dependencies of that dependencies of the other units, looking for
882 * pointers back, and let's fix them up, to instead point to 'u'. */
884 for (k
= 0; k
< _UNIT_DEPENDENCY_MAX
; k
++) {
886 /* Do not add dependencies between u and itself. */
887 if (hashmap_remove(back
->dependencies
[k
], other
))
888 maybe_warn_about_dependency(u
, other_id
, k
);
890 UnitDependencyInfo di_u
, di_other
, di_merged
;
892 /* Let's drop this dependency between "back" and "other", and let's create it between
893 * "back" and "u" instead. Let's merge the bit masks of the dependency we are moving,
894 * and any such dependency which might already exist */
896 di_other
.data
= hashmap_get(back
->dependencies
[k
], other
);
898 continue; /* dependency isn't set, let's try the next one */
900 di_u
.data
= hashmap_get(back
->dependencies
[k
], u
);
902 di_merged
= (UnitDependencyInfo
) {
903 .origin_mask
= di_u
.origin_mask
| di_other
.origin_mask
,
904 .destination_mask
= di_u
.destination_mask
| di_other
.destination_mask
,
907 r
= hashmap_remove_and_replace(back
->dependencies
[k
], other
, u
, di_merged
.data
);
909 log_warning_errno(r
, "Failed to remove/replace: back=%s other=%s u=%s: %m", back
->id
, other_id
, u
->id
);
912 /* assert_se(hashmap_remove_and_replace(back->dependencies[k], other, u, di_merged.data) >= 0); */
918 /* Also do not move dependencies on u to itself */
919 back
= hashmap_remove(other
->dependencies
[d
], u
);
921 maybe_warn_about_dependency(u
, other_id
, d
);
923 /* The move cannot fail. The caller must have performed a reservation. */
924 assert_se(hashmap_complete_move(&u
->dependencies
[d
], &other
->dependencies
[d
]) == 0);
926 other
->dependencies
[d
] = hashmap_free(other
->dependencies
[d
]);
929 int unit_merge(Unit
*u
, Unit
*other
) {
931 const char *other_id
= NULL
;
936 assert(u
->manager
== other
->manager
);
937 assert(u
->type
!= _UNIT_TYPE_INVALID
);
939 other
= unit_follow_merge(other
);
944 if (u
->type
!= other
->type
)
947 if (!u
->instance
!= !other
->instance
)
950 if (!unit_type_may_alias(u
->type
)) /* Merging only applies to unit names that support aliases */
953 if (!IN_SET(other
->load_state
, UNIT_STUB
, UNIT_NOT_FOUND
))
962 if (!UNIT_IS_INACTIVE_OR_FAILED(unit_active_state(other
)))
966 other_id
= strdupa(other
->id
);
968 /* Make reservations to ensure merge_dependencies() won't fail */
969 for (d
= 0; d
< _UNIT_DEPENDENCY_MAX
; d
++) {
970 r
= reserve_dependencies(u
, other
, d
);
972 * We don't rollback reservations if we fail. We don't have
973 * a way to undo reservations. A reservation is not a leak.
980 r
= merge_names(u
, other
);
984 /* Redirect all references */
985 while (other
->refs_by_target
)
986 unit_ref_set(other
->refs_by_target
, other
->refs_by_target
->source
, u
);
988 /* Merge dependencies */
989 for (d
= 0; d
< _UNIT_DEPENDENCY_MAX
; d
++)
990 merge_dependencies(u
, other
, other_id
, d
);
992 other
->load_state
= UNIT_MERGED
;
993 other
->merged_into
= u
;
995 /* If there is still some data attached to the other node, we
996 * don't need it anymore, and can free it. */
997 if (other
->load_state
!= UNIT_STUB
)
998 if (UNIT_VTABLE(other
)->done
)
999 UNIT_VTABLE(other
)->done(other
);
1001 unit_add_to_dbus_queue(u
);
1002 unit_add_to_cleanup_queue(other
);
1007 int unit_merge_by_name(Unit
*u
, const char *name
) {
1008 _cleanup_free_
char *s
= NULL
;
1012 /* Either add name to u, or if a unit with name already exists, merge it with u.
1013 * If name is a template, do the same for name@instance, where instance is u's instance. */
1018 if (unit_name_is_valid(name
, UNIT_NAME_TEMPLATE
)) {
1022 r
= unit_name_replace_instance(name
, u
->instance
, &s
);
1029 other
= manager_get_unit(u
->manager
, name
);
1031 return unit_merge(u
, other
);
1033 return unit_add_name(u
, name
);
1036 Unit
* unit_follow_merge(Unit
*u
) {
1039 while (u
->load_state
== UNIT_MERGED
)
1040 assert_se(u
= u
->merged_into
);
1045 int unit_add_exec_dependencies(Unit
*u
, ExecContext
*c
) {
1046 ExecDirectoryType dt
;
1053 if (c
->working_directory
&& !c
->working_directory_missing_ok
) {
1054 r
= unit_require_mounts_for(u
, c
->working_directory
, UNIT_DEPENDENCY_FILE
);
1059 if (c
->root_directory
) {
1060 r
= unit_require_mounts_for(u
, c
->root_directory
, UNIT_DEPENDENCY_FILE
);
1065 if (c
->root_image
) {
1066 r
= unit_require_mounts_for(u
, c
->root_image
, UNIT_DEPENDENCY_FILE
);
1071 for (dt
= 0; dt
< _EXEC_DIRECTORY_TYPE_MAX
; dt
++) {
1072 if (!u
->manager
->prefix
[dt
])
1075 STRV_FOREACH(dp
, c
->directories
[dt
].paths
) {
1076 _cleanup_free_
char *p
;
1078 p
= path_join(u
->manager
->prefix
[dt
], *dp
);
1082 r
= unit_require_mounts_for(u
, p
, UNIT_DEPENDENCY_FILE
);
1088 if (!MANAGER_IS_SYSTEM(u
->manager
))
1091 /* For the following three directory types we need write access, and /var/ is possibly on the root
1092 * fs. Hence order after systemd-remount-fs.service, to ensure things are writable. */
1093 if (!strv_isempty(c
->directories
[EXEC_DIRECTORY_STATE
].paths
) ||
1094 !strv_isempty(c
->directories
[EXEC_DIRECTORY_CACHE
].paths
) ||
1095 !strv_isempty(c
->directories
[EXEC_DIRECTORY_LOGS
].paths
)) {
1096 r
= unit_add_dependency_by_name(u
, UNIT_AFTER
, SPECIAL_REMOUNT_FS_SERVICE
, true, UNIT_DEPENDENCY_FILE
);
1101 if (c
->private_tmp
) {
1104 FOREACH_STRING(p
, "/tmp", "/var/tmp") {
1105 r
= unit_require_mounts_for(u
, p
, UNIT_DEPENDENCY_FILE
);
1110 r
= unit_add_dependency_by_name(u
, UNIT_AFTER
, SPECIAL_TMPFILES_SETUP_SERVICE
, true, UNIT_DEPENDENCY_FILE
);
1115 if (c
->root_image
) {
1116 /* We need to wait for /dev/loopX to appear when doing RootImage=, hence let's add an
1117 * implicit dependency on udev */
1119 r
= unit_add_dependency_by_name(u
, UNIT_AFTER
, SPECIAL_UDEVD_SERVICE
, true, UNIT_DEPENDENCY_FILE
);
1124 if (!IN_SET(c
->std_output
,
1125 EXEC_OUTPUT_JOURNAL
, EXEC_OUTPUT_JOURNAL_AND_CONSOLE
,
1126 EXEC_OUTPUT_KMSG
, EXEC_OUTPUT_KMSG_AND_CONSOLE
,
1127 EXEC_OUTPUT_SYSLOG
, EXEC_OUTPUT_SYSLOG_AND_CONSOLE
) &&
1128 !IN_SET(c
->std_error
,
1129 EXEC_OUTPUT_JOURNAL
, EXEC_OUTPUT_JOURNAL_AND_CONSOLE
,
1130 EXEC_OUTPUT_KMSG
, EXEC_OUTPUT_KMSG_AND_CONSOLE
,
1131 EXEC_OUTPUT_SYSLOG
, EXEC_OUTPUT_SYSLOG_AND_CONSOLE
) &&
1135 /* If syslog or kernel logging is requested (or log namespacing is), make sure our own logging daemon
1138 if (c
->log_namespace
) {
1139 _cleanup_free_
char *socket_unit
= NULL
, *varlink_socket_unit
= NULL
;
1141 r
= unit_name_build_from_type("systemd-journald", c
->log_namespace
, UNIT_SOCKET
, &socket_unit
);
1145 r
= unit_add_two_dependencies_by_name(u
, UNIT_AFTER
, UNIT_REQUIRES
, socket_unit
, true, UNIT_DEPENDENCY_FILE
);
1149 r
= unit_name_build_from_type("systemd-journald-varlink", c
->log_namespace
, UNIT_SOCKET
, &varlink_socket_unit
);
1153 r
= unit_add_two_dependencies_by_name(u
, UNIT_AFTER
, UNIT_REQUIRES
, varlink_socket_unit
, true, UNIT_DEPENDENCY_FILE
);
1157 r
= unit_add_dependency_by_name(u
, UNIT_AFTER
, SPECIAL_JOURNALD_SOCKET
, true, UNIT_DEPENDENCY_FILE
);
1164 const char *unit_description(Unit
*u
) {
1168 return u
->description
;
1170 return strna(u
->id
);
1173 const char *unit_status_string(Unit
*u
) {
1176 if (u
->manager
->status_unit_format
== STATUS_UNIT_FORMAT_NAME
&& u
->id
)
1179 return unit_description(u
);
1182 static void print_unit_dependency_mask(FILE *f
, const char *kind
, UnitDependencyMask mask
, bool *space
) {
1184 UnitDependencyMask mask
;
1187 { UNIT_DEPENDENCY_FILE
, "file" },
1188 { UNIT_DEPENDENCY_IMPLICIT
, "implicit" },
1189 { UNIT_DEPENDENCY_DEFAULT
, "default" },
1190 { UNIT_DEPENDENCY_UDEV
, "udev" },
1191 { UNIT_DEPENDENCY_PATH
, "path" },
1192 { UNIT_DEPENDENCY_MOUNTINFO_IMPLICIT
, "mountinfo-implicit" },
1193 { UNIT_DEPENDENCY_MOUNTINFO_DEFAULT
, "mountinfo-default" },
1194 { UNIT_DEPENDENCY_PROC_SWAP
, "proc-swap" },
1202 for (i
= 0; i
< ELEMENTSOF(table
); i
++) {
1207 if (FLAGS_SET(mask
, table
[i
].mask
)) {
1215 fputs(table
[i
].name
, f
);
1217 mask
&= ~table
[i
].mask
;
1224 void unit_dump(Unit
*u
, FILE *f
, const char *prefix
) {
1228 const char *prefix2
;
1229 char timestamp
[5][FORMAT_TIMESTAMP_MAX
], timespan
[FORMAT_TIMESPAN_MAX
];
1231 _cleanup_set_free_ Set
*following_set
= NULL
;
1237 assert(u
->type
>= 0);
1239 prefix
= strempty(prefix
);
1240 prefix2
= strjoina(prefix
, "\t");
1246 SET_FOREACH(t
, u
->names
, i
)
1247 if (!streq(t
, u
->id
))
1248 fprintf(f
, "%s\tAlias: %s\n", prefix
, t
);
1251 "%s\tDescription: %s\n"
1252 "%s\tInstance: %s\n"
1253 "%s\tUnit Load State: %s\n"
1254 "%s\tUnit Active State: %s\n"
1255 "%s\tState Change Timestamp: %s\n"
1256 "%s\tInactive Exit Timestamp: %s\n"
1257 "%s\tActive Enter Timestamp: %s\n"
1258 "%s\tActive Exit Timestamp: %s\n"
1259 "%s\tInactive Enter Timestamp: %s\n"
1261 "%s\tNeed Daemon Reload: %s\n"
1262 "%s\tTransient: %s\n"
1263 "%s\tPerpetual: %s\n"
1264 "%s\tGarbage Collection Mode: %s\n"
1267 "%s\tCGroup realized: %s\n",
1268 prefix
, unit_description(u
),
1269 prefix
, strna(u
->instance
),
1270 prefix
, unit_load_state_to_string(u
->load_state
),
1271 prefix
, unit_active_state_to_string(unit_active_state(u
)),
1272 prefix
, strna(format_timestamp(timestamp
[0], sizeof(timestamp
[0]), u
->state_change_timestamp
.realtime
)),
1273 prefix
, strna(format_timestamp(timestamp
[1], sizeof(timestamp
[1]), u
->inactive_exit_timestamp
.realtime
)),
1274 prefix
, strna(format_timestamp(timestamp
[2], sizeof(timestamp
[2]), u
->active_enter_timestamp
.realtime
)),
1275 prefix
, strna(format_timestamp(timestamp
[3], sizeof(timestamp
[3]), u
->active_exit_timestamp
.realtime
)),
1276 prefix
, strna(format_timestamp(timestamp
[4], sizeof(timestamp
[4]), u
->inactive_enter_timestamp
.realtime
)),
1277 prefix
, yes_no(unit_may_gc(u
)),
1278 prefix
, yes_no(unit_need_daemon_reload(u
)),
1279 prefix
, yes_no(u
->transient
),
1280 prefix
, yes_no(u
->perpetual
),
1281 prefix
, collect_mode_to_string(u
->collect_mode
),
1282 prefix
, strna(unit_slice_name(u
)),
1283 prefix
, strna(u
->cgroup_path
),
1284 prefix
, yes_no(u
->cgroup_realized
));
1286 if (u
->cgroup_realized_mask
!= 0) {
1287 _cleanup_free_
char *s
= NULL
;
1288 (void) cg_mask_to_string(u
->cgroup_realized_mask
, &s
);
1289 fprintf(f
, "%s\tCGroup realized mask: %s\n", prefix
, strnull(s
));
1292 if (u
->cgroup_enabled_mask
!= 0) {
1293 _cleanup_free_
char *s
= NULL
;
1294 (void) cg_mask_to_string(u
->cgroup_enabled_mask
, &s
);
1295 fprintf(f
, "%s\tCGroup enabled mask: %s\n", prefix
, strnull(s
));
1298 m
= unit_get_own_mask(u
);
1300 _cleanup_free_
char *s
= NULL
;
1301 (void) cg_mask_to_string(m
, &s
);
1302 fprintf(f
, "%s\tCGroup own mask: %s\n", prefix
, strnull(s
));
1305 m
= unit_get_members_mask(u
);
1307 _cleanup_free_
char *s
= NULL
;
1308 (void) cg_mask_to_string(m
, &s
);
1309 fprintf(f
, "%s\tCGroup members mask: %s\n", prefix
, strnull(s
));
1312 m
= unit_get_delegate_mask(u
);
1314 _cleanup_free_
char *s
= NULL
;
1315 (void) cg_mask_to_string(m
, &s
);
1316 fprintf(f
, "%s\tCGroup delegate mask: %s\n", prefix
, strnull(s
));
1319 if (!sd_id128_is_null(u
->invocation_id
))
1320 fprintf(f
, "%s\tInvocation ID: " SD_ID128_FORMAT_STR
"\n",
1321 prefix
, SD_ID128_FORMAT_VAL(u
->invocation_id
));
1323 STRV_FOREACH(j
, u
->documentation
)
1324 fprintf(f
, "%s\tDocumentation: %s\n", prefix
, *j
);
1326 following
= unit_following(u
);
1328 fprintf(f
, "%s\tFollowing: %s\n", prefix
, following
->id
);
1330 r
= unit_following_set(u
, &following_set
);
1334 SET_FOREACH(other
, following_set
, i
)
1335 fprintf(f
, "%s\tFollowing Set Member: %s\n", prefix
, other
->id
);
1338 if (u
->fragment_path
)
1339 fprintf(f
, "%s\tFragment Path: %s\n", prefix
, u
->fragment_path
);
1342 fprintf(f
, "%s\tSource Path: %s\n", prefix
, u
->source_path
);
1344 STRV_FOREACH(j
, u
->dropin_paths
)
1345 fprintf(f
, "%s\tDropIn Path: %s\n", prefix
, *j
);
1347 if (u
->failure_action
!= EMERGENCY_ACTION_NONE
)
1348 fprintf(f
, "%s\tFailure Action: %s\n", prefix
, emergency_action_to_string(u
->failure_action
));
1349 if (u
->failure_action_exit_status
>= 0)
1350 fprintf(f
, "%s\tFailure Action Exit Status: %i\n", prefix
, u
->failure_action_exit_status
);
1351 if (u
->success_action
!= EMERGENCY_ACTION_NONE
)
1352 fprintf(f
, "%s\tSuccess Action: %s\n", prefix
, emergency_action_to_string(u
->success_action
));
1353 if (u
->success_action_exit_status
>= 0)
1354 fprintf(f
, "%s\tSuccess Action Exit Status: %i\n", prefix
, u
->success_action_exit_status
);
1356 if (u
->job_timeout
!= USEC_INFINITY
)
1357 fprintf(f
, "%s\tJob Timeout: %s\n", prefix
, format_timespan(timespan
, sizeof(timespan
), u
->job_timeout
, 0));
1359 if (u
->job_timeout_action
!= EMERGENCY_ACTION_NONE
)
1360 fprintf(f
, "%s\tJob Timeout Action: %s\n", prefix
, emergency_action_to_string(u
->job_timeout_action
));
1362 if (u
->job_timeout_reboot_arg
)
1363 fprintf(f
, "%s\tJob Timeout Reboot Argument: %s\n", prefix
, u
->job_timeout_reboot_arg
);
1365 condition_dump_list(u
->conditions
, f
, prefix
, condition_type_to_string
);
1366 condition_dump_list(u
->asserts
, f
, prefix
, assert_type_to_string
);
1368 if (dual_timestamp_is_set(&u
->condition_timestamp
))
1370 "%s\tCondition Timestamp: %s\n"
1371 "%s\tCondition Result: %s\n",
1372 prefix
, strna(format_timestamp(timestamp
[0], sizeof(timestamp
[0]), u
->condition_timestamp
.realtime
)),
1373 prefix
, yes_no(u
->condition_result
));
1375 if (dual_timestamp_is_set(&u
->assert_timestamp
))
1377 "%s\tAssert Timestamp: %s\n"
1378 "%s\tAssert Result: %s\n",
1379 prefix
, strna(format_timestamp(timestamp
[0], sizeof(timestamp
[0]), u
->assert_timestamp
.realtime
)),
1380 prefix
, yes_no(u
->assert_result
));
1382 for (d
= 0; d
< _UNIT_DEPENDENCY_MAX
; d
++) {
1383 UnitDependencyInfo di
;
1386 HASHMAP_FOREACH_KEY(di
.data
, other
, u
->dependencies
[d
], i
) {
1389 fprintf(f
, "%s\t%s: %s (", prefix
, unit_dependency_to_string(d
), other
->id
);
1391 print_unit_dependency_mask(f
, "origin", di
.origin_mask
, &space
);
1392 print_unit_dependency_mask(f
, "destination", di
.destination_mask
, &space
);
1398 if (!hashmap_isempty(u
->requires_mounts_for
)) {
1399 UnitDependencyInfo di
;
1402 HASHMAP_FOREACH_KEY(di
.data
, path
, u
->requires_mounts_for
, i
) {
1405 fprintf(f
, "%s\tRequiresMountsFor: %s (", prefix
, path
);
1407 print_unit_dependency_mask(f
, "origin", di
.origin_mask
, &space
);
1408 print_unit_dependency_mask(f
, "destination", di
.destination_mask
, &space
);
1414 if (u
->load_state
== UNIT_LOADED
) {
1417 "%s\tStopWhenUnneeded: %s\n"
1418 "%s\tRefuseManualStart: %s\n"
1419 "%s\tRefuseManualStop: %s\n"
1420 "%s\tDefaultDependencies: %s\n"
1421 "%s\tOnFailureJobMode: %s\n"
1422 "%s\tIgnoreOnIsolate: %s\n",
1423 prefix
, yes_no(u
->stop_when_unneeded
),
1424 prefix
, yes_no(u
->refuse_manual_start
),
1425 prefix
, yes_no(u
->refuse_manual_stop
),
1426 prefix
, yes_no(u
->default_dependencies
),
1427 prefix
, job_mode_to_string(u
->on_failure_job_mode
),
1428 prefix
, yes_no(u
->ignore_on_isolate
));
1430 if (UNIT_VTABLE(u
)->dump
)
1431 UNIT_VTABLE(u
)->dump(u
, f
, prefix2
);
1433 } else if (u
->load_state
== UNIT_MERGED
)
1435 "%s\tMerged into: %s\n",
1436 prefix
, u
->merged_into
->id
);
1437 else if (u
->load_state
== UNIT_ERROR
)
1438 fprintf(f
, "%s\tLoad Error Code: %s\n", prefix
, strerror_safe(u
->load_error
));
1440 for (n
= sd_bus_track_first(u
->bus_track
); n
; n
= sd_bus_track_next(u
->bus_track
))
1441 fprintf(f
, "%s\tBus Ref: %s\n", prefix
, n
);
1444 job_dump(u
->job
, f
, prefix2
);
1447 job_dump(u
->nop_job
, f
, prefix2
);
1450 /* Common implementation for multiple backends */
1451 int unit_load_fragment_and_dropin(Unit
*u
, bool fragment_required
) {
1456 /* Load a .{service,socket,...} file */
1457 r
= unit_load_fragment(u
);
1461 if (u
->load_state
== UNIT_STUB
) {
1462 if (fragment_required
)
1465 u
->load_state
= UNIT_LOADED
;
1468 /* Load drop-in directory data. If u is an alias, we might be reloading the
1469 * target unit needlessly. But we cannot be sure which drops-ins have already
1470 * been loaded and which not, at least without doing complicated book-keeping,
1471 * so let's always reread all drop-ins. */
1472 return unit_load_dropin(unit_follow_merge(u
));
1475 void unit_add_to_target_deps_queue(Unit
*u
) {
1476 Manager
*m
= u
->manager
;
1480 if (u
->in_target_deps_queue
)
1483 LIST_PREPEND(target_deps_queue
, m
->target_deps_queue
, u
);
1484 u
->in_target_deps_queue
= true;
1487 int unit_add_default_target_dependency(Unit
*u
, Unit
*target
) {
1491 if (target
->type
!= UNIT_TARGET
)
1494 /* Only add the dependency if both units are loaded, so that
1495 * that loop check below is reliable */
1496 if (u
->load_state
!= UNIT_LOADED
||
1497 target
->load_state
!= UNIT_LOADED
)
1500 /* If either side wants no automatic dependencies, then let's
1502 if (!u
->default_dependencies
||
1503 !target
->default_dependencies
)
1506 /* Don't create loops */
1507 if (hashmap_get(target
->dependencies
[UNIT_BEFORE
], u
))
1510 return unit_add_dependency(target
, UNIT_AFTER
, u
, true, UNIT_DEPENDENCY_DEFAULT
);
1513 static int unit_add_slice_dependencies(Unit
*u
) {
1514 UnitDependencyMask mask
;
1517 if (!UNIT_HAS_CGROUP_CONTEXT(u
))
1520 /* Slice units are implicitly ordered against their parent slices (as this relationship is encoded in the
1521 name), while all other units are ordered based on configuration (as in their case Slice= configures the
1523 mask
= u
->type
== UNIT_SLICE
? UNIT_DEPENDENCY_IMPLICIT
: UNIT_DEPENDENCY_FILE
;
1525 if (UNIT_ISSET(u
->slice
))
1526 return unit_add_two_dependencies(u
, UNIT_AFTER
, UNIT_REQUIRES
, UNIT_DEREF(u
->slice
), true, mask
);
1528 if (unit_has_name(u
, SPECIAL_ROOT_SLICE
))
1531 return unit_add_two_dependencies_by_name(u
, UNIT_AFTER
, UNIT_REQUIRES
, SPECIAL_ROOT_SLICE
, true, mask
);
1534 static int unit_add_mount_dependencies(Unit
*u
) {
1535 UnitDependencyInfo di
;
1542 HASHMAP_FOREACH_KEY(di
.data
, path
, u
->requires_mounts_for
, i
) {
1543 char prefix
[strlen(path
) + 1];
1545 PATH_FOREACH_PREFIX_MORE(prefix
, path
) {
1546 _cleanup_free_
char *p
= NULL
;
1549 r
= unit_name_from_path(prefix
, ".mount", &p
);
1553 m
= manager_get_unit(u
->manager
, p
);
1555 /* Make sure to load the mount unit if
1556 * it exists. If so the dependencies
1557 * on this unit will be added later
1558 * during the loading of the mount
1560 (void) manager_load_unit_prepare(u
->manager
, p
, NULL
, NULL
, &m
);
1566 if (m
->load_state
!= UNIT_LOADED
)
1569 r
= unit_add_dependency(u
, UNIT_AFTER
, m
, true, di
.origin_mask
);
1573 if (m
->fragment_path
) {
1574 r
= unit_add_dependency(u
, UNIT_REQUIRES
, m
, true, di
.origin_mask
);
1584 static int unit_add_startup_units(Unit
*u
) {
1588 c
= unit_get_cgroup_context(u
);
1592 if (c
->startup_cpu_shares
== CGROUP_CPU_SHARES_INVALID
&&
1593 c
->startup_io_weight
== CGROUP_WEIGHT_INVALID
&&
1594 c
->startup_blockio_weight
== CGROUP_BLKIO_WEIGHT_INVALID
)
1597 r
= set_ensure_allocated(&u
->manager
->startup_units
, NULL
);
1601 return set_put(u
->manager
->startup_units
, u
);
1604 int unit_load(Unit
*u
) {
1609 if (u
->in_load_queue
) {
1610 LIST_REMOVE(load_queue
, u
->manager
->load_queue
, u
);
1611 u
->in_load_queue
= false;
1614 if (u
->type
== _UNIT_TYPE_INVALID
)
1617 if (u
->load_state
!= UNIT_STUB
)
1620 if (u
->transient_file
) {
1621 /* Finalize transient file: if this is a transient unit file, as soon as we reach unit_load() the setup
1622 * is complete, hence let's synchronize the unit file we just wrote to disk. */
1624 r
= fflush_and_check(u
->transient_file
);
1628 u
->transient_file
= safe_fclose(u
->transient_file
);
1629 u
->fragment_mtime
= now(CLOCK_REALTIME
);
1632 r
= UNIT_VTABLE(u
)->load(u
);
1636 assert(u
->load_state
!= UNIT_STUB
);
1638 if (u
->load_state
== UNIT_LOADED
) {
1639 unit_add_to_target_deps_queue(u
);
1641 r
= unit_add_slice_dependencies(u
);
1645 r
= unit_add_mount_dependencies(u
);
1649 r
= unit_add_startup_units(u
);
1653 if (u
->on_failure_job_mode
== JOB_ISOLATE
&& hashmap_size(u
->dependencies
[UNIT_ON_FAILURE
]) > 1) {
1654 log_unit_error(u
, "More than one OnFailure= dependencies specified but OnFailureJobMode=isolate set. Refusing.");
1659 if (u
->job_running_timeout
!= USEC_INFINITY
&& u
->job_running_timeout
> u
->job_timeout
)
1660 log_unit_warning(u
, "JobRunningTimeoutSec= is greater than JobTimeoutSec=, it has no effect.");
1662 /* We finished loading, let's ensure our parents recalculate the members mask */
1663 unit_invalidate_cgroup_members_masks(u
);
1666 assert((u
->load_state
!= UNIT_MERGED
) == !u
->merged_into
);
1668 unit_add_to_dbus_queue(unit_follow_merge(u
));
1669 unit_add_to_gc_queue(u
);
1674 /* We convert ENOEXEC errors to the UNIT_BAD_SETTING load state here. Configuration parsing code should hence
1675 * return ENOEXEC to ensure units are placed in this state after loading */
1677 u
->load_state
= u
->load_state
== UNIT_STUB
? UNIT_NOT_FOUND
:
1678 r
== -ENOEXEC
? UNIT_BAD_SETTING
:
1682 unit_add_to_dbus_queue(u
);
1683 unit_add_to_gc_queue(u
);
1685 return log_unit_debug_errno(u
, r
, "Failed to load configuration: %m");
1689 static int log_unit_internal(void *userdata
, int level
, int error
, const char *file
, int line
, const char *func
, const char *format
, ...) {
1694 va_start(ap
, format
);
1696 r
= log_object_internalv(level
, error
, file
, line
, func
,
1697 u
->manager
->unit_log_field
,
1699 u
->manager
->invocation_log_field
,
1700 u
->invocation_id_string
,
1703 r
= log_internalv(level
, error
, file
, line
, func
, format
, ap
);
1709 static bool unit_test_condition(Unit
*u
) {
1712 dual_timestamp_get(&u
->condition_timestamp
);
1713 u
->condition_result
= condition_test_list(u
->conditions
, condition_type_to_string
, log_unit_internal
, u
);
1715 unit_add_to_dbus_queue(u
);
1717 return u
->condition_result
;
1720 static bool unit_test_assert(Unit
*u
) {
1723 dual_timestamp_get(&u
->assert_timestamp
);
1724 u
->assert_result
= condition_test_list(u
->asserts
, assert_type_to_string
, log_unit_internal
, u
);
1726 unit_add_to_dbus_queue(u
);
1728 return u
->assert_result
;
1731 void unit_status_printf(Unit
*u
, StatusType status_type
, const char *status
, const char *unit_status_msg_format
) {
1734 d
= unit_status_string(u
);
1735 if (log_get_show_color())
1736 d
= strjoina(ANSI_HIGHLIGHT
, d
, ANSI_NORMAL
);
1738 DISABLE_WARNING_FORMAT_NONLITERAL
;
1739 manager_status_printf(u
->manager
, status_type
, status
, unit_status_msg_format
, d
);
1743 int unit_test_start_limit(Unit
*u
) {
1748 if (ratelimit_below(&u
->start_ratelimit
)) {
1749 u
->start_limit_hit
= false;
1753 log_unit_warning(u
, "Start request repeated too quickly.");
1754 u
->start_limit_hit
= true;
1756 reason
= strjoina("unit ", u
->id
, " failed");
1758 emergency_action(u
->manager
, u
->start_limit_action
,
1759 EMERGENCY_ACTION_IS_WATCHDOG
|EMERGENCY_ACTION_WARN
,
1760 u
->reboot_arg
, -1, reason
);
1765 bool unit_shall_confirm_spawn(Unit
*u
) {
1768 if (manager_is_confirm_spawn_disabled(u
->manager
))
1771 /* For some reasons units remaining in the same process group
1772 * as PID 1 fail to acquire the console even if it's not used
1773 * by any process. So skip the confirmation question for them. */
1774 return !unit_get_exec_context(u
)->same_pgrp
;
1777 static bool unit_verify_deps(Unit
*u
) {
1784 /* Checks whether all BindsTo= dependencies of this unit are fulfilled — if they are also combined with
1785 * After=. We do not check Requires= or Requisite= here as they only should have an effect on the job
1786 * processing, but do not have any effect afterwards. We don't check BindsTo= dependencies that are not used in
1787 * conjunction with After= as for them any such check would make things entirely racy. */
1789 HASHMAP_FOREACH_KEY(v
, other
, u
->dependencies
[UNIT_BINDS_TO
], j
) {
1791 if (!hashmap_contains(u
->dependencies
[UNIT_AFTER
], other
))
1794 if (!UNIT_IS_ACTIVE_OR_RELOADING(unit_active_state(other
))) {
1795 log_unit_notice(u
, "Bound to unit %s, but unit isn't active.", other
->id
);
1803 /* Errors that aren't really errors:
1804 * -EALREADY: Unit is already started.
1805 * -ECOMM: Condition failed
1806 * -EAGAIN: An operation is already in progress. Retry later.
1808 * Errors that are real errors:
1809 * -EBADR: This unit type does not support starting.
1810 * -ECANCELED: Start limit hit, too many requests for now
1811 * -EPROTO: Assert failed
1812 * -EINVAL: Unit not loaded
1813 * -EOPNOTSUPP: Unit type not supported
1814 * -ENOLINK: The necessary dependencies are not fulfilled.
1815 * -ESTALE: This unit has been started before and can't be started a second time
1816 * -ENOENT: This is a triggering unit and unit to trigger is not loaded
1818 int unit_start(Unit
*u
) {
1819 UnitActiveState state
;
1824 /* If this is already started, then this will succeed. Note that this will even succeed if this unit
1825 * is not startable by the user. This is relied on to detect when we need to wait for units and when
1826 * waiting is finished. */
1827 state
= unit_active_state(u
);
1828 if (UNIT_IS_ACTIVE_OR_RELOADING(state
))
1830 if (state
== UNIT_MAINTENANCE
)
1833 /* Units that aren't loaded cannot be started */
1834 if (u
->load_state
!= UNIT_LOADED
)
1837 /* Refuse starting scope units more than once */
1838 if (UNIT_VTABLE(u
)->once_only
&& dual_timestamp_is_set(&u
->inactive_enter_timestamp
))
1841 /* If the conditions failed, don't do anything at all. If we already are activating this call might
1842 * still be useful to speed up activation in case there is some hold-off time, but we don't want to
1843 * recheck the condition in that case. */
1844 if (state
!= UNIT_ACTIVATING
&&
1845 !unit_test_condition(u
))
1846 return log_unit_debug_errno(u
, SYNTHETIC_ERRNO(ECOMM
), "Starting requested but condition failed. Not starting unit.");
1848 /* If the asserts failed, fail the entire job */
1849 if (state
!= UNIT_ACTIVATING
&&
1850 !unit_test_assert(u
))
1851 return log_unit_notice_errno(u
, SYNTHETIC_ERRNO(EPROTO
), "Starting requested but asserts failed.");
1853 /* Units of types that aren't supported cannot be started. Note that we do this test only after the
1854 * condition checks, so that we rather return condition check errors (which are usually not
1855 * considered a true failure) than "not supported" errors (which are considered a failure).
1857 if (!unit_type_supported(u
->type
))
1860 /* Let's make sure that the deps really are in order before we start this. Normally the job engine
1861 * should have taken care of this already, but let's check this here again. After all, our
1862 * dependencies might not be in effect anymore, due to a reload or due to a failed condition. */
1863 if (!unit_verify_deps(u
))
1866 /* Forward to the main object, if we aren't it. */
1867 following
= unit_following(u
);
1869 log_unit_debug(u
, "Redirecting start request from %s to %s.", u
->id
, following
->id
);
1870 return unit_start(following
);
1873 /* If it is stopped, but we cannot start it, then fail */
1874 if (!UNIT_VTABLE(u
)->start
)
1877 /* We don't suppress calls to ->start() here when we are already starting, to allow this request to
1878 * be used as a "hurry up" call, for example when the unit is in some "auto restart" state where it
1879 * waits for a holdoff timer to elapse before it will start again. */
1881 unit_add_to_dbus_queue(u
);
1882 unit_cgroup_freezer_action(u
, FREEZER_THAW
);
1884 return UNIT_VTABLE(u
)->start(u
);
1887 bool unit_can_start(Unit
*u
) {
1890 if (u
->load_state
!= UNIT_LOADED
)
1893 if (!unit_type_supported(u
->type
))
1896 /* Scope units may be started only once */
1897 if (UNIT_VTABLE(u
)->once_only
&& dual_timestamp_is_set(&u
->inactive_exit_timestamp
))
1900 return !!UNIT_VTABLE(u
)->start
;
1903 bool unit_can_isolate(Unit
*u
) {
1906 return unit_can_start(u
) &&
1911 * -EBADR: This unit type does not support stopping.
1912 * -EALREADY: Unit is already stopped.
1913 * -EAGAIN: An operation is already in progress. Retry later.
1915 int unit_stop(Unit
*u
) {
1916 UnitActiveState state
;
1921 state
= unit_active_state(u
);
1922 if (UNIT_IS_INACTIVE_OR_FAILED(state
))
1925 following
= unit_following(u
);
1927 log_unit_debug(u
, "Redirecting stop request from %s to %s.", u
->id
, following
->id
);
1928 return unit_stop(following
);
1931 if (!UNIT_VTABLE(u
)->stop
)
1934 unit_add_to_dbus_queue(u
);
1935 unit_cgroup_freezer_action(u
, FREEZER_THAW
);
1937 return UNIT_VTABLE(u
)->stop(u
);
1940 bool unit_can_stop(Unit
*u
) {
1943 if (!unit_type_supported(u
->type
))
1949 return !!UNIT_VTABLE(u
)->stop
;
1953 * -EBADR: This unit type does not support reloading.
1954 * -ENOEXEC: Unit is not started.
1955 * -EAGAIN: An operation is already in progress. Retry later.
1957 int unit_reload(Unit
*u
) {
1958 UnitActiveState state
;
1963 if (u
->load_state
!= UNIT_LOADED
)
1966 if (!unit_can_reload(u
))
1969 state
= unit_active_state(u
);
1970 if (state
== UNIT_RELOADING
)
1973 if (state
!= UNIT_ACTIVE
) {
1974 log_unit_warning(u
, "Unit cannot be reloaded because it is inactive.");
1978 following
= unit_following(u
);
1980 log_unit_debug(u
, "Redirecting reload request from %s to %s.", u
->id
, following
->id
);
1981 return unit_reload(following
);
1984 unit_add_to_dbus_queue(u
);
1986 if (!UNIT_VTABLE(u
)->reload
) {
1987 /* Unit doesn't have a reload function, but we need to propagate the reload anyway */
1988 unit_notify(u
, unit_active_state(u
), unit_active_state(u
), 0);
1992 unit_cgroup_freezer_action(u
, FREEZER_THAW
);
1994 return UNIT_VTABLE(u
)->reload(u
);
1997 bool unit_can_reload(Unit
*u
) {
2000 if (UNIT_VTABLE(u
)->can_reload
)
2001 return UNIT_VTABLE(u
)->can_reload(u
);
2003 if (!hashmap_isempty(u
->dependencies
[UNIT_PROPAGATES_RELOAD_TO
]))
2006 return UNIT_VTABLE(u
)->reload
;
2009 bool unit_is_unneeded(Unit
*u
) {
2010 static const UnitDependency deps
[] = {
2020 if (!u
->stop_when_unneeded
)
2023 /* Don't clean up while the unit is transitioning or is even inactive. */
2024 if (!UNIT_IS_ACTIVE_OR_RELOADING(unit_active_state(u
)))
2029 for (j
= 0; j
< ELEMENTSOF(deps
); j
++) {
2034 /* If a dependent unit has a job queued, is active or transitioning, or is marked for
2035 * restart, then don't clean this one up. */
2037 HASHMAP_FOREACH_KEY(v
, other
, u
->dependencies
[deps
[j
]], i
) {
2041 if (!UNIT_IS_INACTIVE_OR_FAILED(unit_active_state(other
)))
2044 if (unit_will_restart(other
))
2052 static void check_unneeded_dependencies(Unit
*u
) {
2054 static const UnitDependency deps
[] = {
2064 /* Add all units this unit depends on to the queue that processes StopWhenUnneeded= behaviour. */
2066 for (j
= 0; j
< ELEMENTSOF(deps
); j
++) {
2071 HASHMAP_FOREACH_KEY(v
, other
, u
->dependencies
[deps
[j
]], i
)
2072 unit_submit_to_stop_when_unneeded_queue(other
);
2076 static void unit_check_binds_to(Unit
*u
) {
2077 _cleanup_(sd_bus_error_free
) sd_bus_error error
= SD_BUS_ERROR_NULL
;
2089 if (unit_active_state(u
) != UNIT_ACTIVE
)
2092 HASHMAP_FOREACH_KEY(v
, other
, u
->dependencies
[UNIT_BINDS_TO
], i
) {
2096 if (!other
->coldplugged
)
2097 /* We might yet create a job for the other unit… */
2100 if (!UNIT_IS_INACTIVE_OR_FAILED(unit_active_state(other
)))
2110 /* If stopping a unit fails continuously we might enter a stop
2111 * loop here, hence stop acting on the service being
2112 * unnecessary after a while. */
2113 if (!ratelimit_below(&u
->auto_stop_ratelimit
)) {
2114 log_unit_warning(u
, "Unit is bound to inactive unit %s, but not stopping since we tried this too often recently.", other
->id
);
2119 log_unit_info(u
, "Unit is bound to inactive unit %s. Stopping, too.", other
->id
);
2121 /* A unit we need to run is gone. Sniff. Let's stop this. */
2122 r
= manager_add_job(u
->manager
, JOB_STOP
, u
, JOB_FAIL
, NULL
, &error
, NULL
);
2124 log_unit_warning_errno(u
, r
, "Failed to enqueue stop job, ignoring: %s", bus_error_message(&error
, r
));
2127 static void retroactively_start_dependencies(Unit
*u
) {
2133 assert(UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(u
)));
2135 HASHMAP_FOREACH_KEY(v
, other
, u
->dependencies
[UNIT_REQUIRES
], i
)
2136 if (!hashmap_get(u
->dependencies
[UNIT_AFTER
], other
) &&
2137 !UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(other
)))
2138 manager_add_job(u
->manager
, JOB_START
, other
, JOB_REPLACE
, NULL
, NULL
, NULL
);
2140 HASHMAP_FOREACH_KEY(v
, other
, u
->dependencies
[UNIT_BINDS_TO
], i
)
2141 if (!hashmap_get(u
->dependencies
[UNIT_AFTER
], other
) &&
2142 !UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(other
)))
2143 manager_add_job(u
->manager
, JOB_START
, other
, JOB_REPLACE
, NULL
, NULL
, NULL
);
2145 HASHMAP_FOREACH_KEY(v
, other
, u
->dependencies
[UNIT_WANTS
], i
)
2146 if (!hashmap_get(u
->dependencies
[UNIT_AFTER
], other
) &&
2147 !UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(other
)))
2148 manager_add_job(u
->manager
, JOB_START
, other
, JOB_FAIL
, NULL
, NULL
, NULL
);
2150 HASHMAP_FOREACH_KEY(v
, other
, u
->dependencies
[UNIT_CONFLICTS
], i
)
2151 if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other
)))
2152 manager_add_job(u
->manager
, JOB_STOP
, other
, JOB_REPLACE
, NULL
, NULL
, NULL
);
2154 HASHMAP_FOREACH_KEY(v
, other
, u
->dependencies
[UNIT_CONFLICTED_BY
], i
)
2155 if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other
)))
2156 manager_add_job(u
->manager
, JOB_STOP
, other
, JOB_REPLACE
, NULL
, NULL
, NULL
);
2159 static void retroactively_stop_dependencies(Unit
*u
) {
2165 assert(UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(u
)));
2167 /* Pull down units which are bound to us recursively if enabled */
2168 HASHMAP_FOREACH_KEY(v
, other
, u
->dependencies
[UNIT_BOUND_BY
], i
)
2169 if (!UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(other
)))
2170 manager_add_job(u
->manager
, JOB_STOP
, other
, JOB_REPLACE
, NULL
, NULL
, NULL
);
2173 void unit_start_on_failure(Unit
*u
) {
2181 if (hashmap_size(u
->dependencies
[UNIT_ON_FAILURE
]) <= 0)
2184 log_unit_info(u
, "Triggering OnFailure= dependencies.");
2186 HASHMAP_FOREACH_KEY(v
, other
, u
->dependencies
[UNIT_ON_FAILURE
], i
) {
2187 _cleanup_(sd_bus_error_free
) sd_bus_error error
= SD_BUS_ERROR_NULL
;
2189 r
= manager_add_job(u
->manager
, JOB_START
, other
, u
->on_failure_job_mode
, NULL
, &error
, NULL
);
2191 log_unit_warning_errno(u
, r
, "Failed to enqueue OnFailure= job, ignoring: %s", bus_error_message(&error
, r
));
2195 void unit_trigger_notify(Unit
*u
) {
2202 HASHMAP_FOREACH_KEY(v
, other
, u
->dependencies
[UNIT_TRIGGERED_BY
], i
)
2203 if (UNIT_VTABLE(other
)->trigger_notify
)
2204 UNIT_VTABLE(other
)->trigger_notify(other
, u
);
2207 static int raise_level(int log_level
, bool condition_info
, bool condition_notice
) {
2208 if (condition_notice
&& log_level
> LOG_NOTICE
)
2210 if (condition_info
&& log_level
> LOG_INFO
)
2215 static int unit_log_resources(Unit
*u
) {
2216 struct iovec iovec
[1 + _CGROUP_IP_ACCOUNTING_METRIC_MAX
+ _CGROUP_IO_ACCOUNTING_METRIC_MAX
+ 4];
2217 bool any_traffic
= false, have_ip_accounting
= false, any_io
= false, have_io_accounting
= false;
2218 _cleanup_free_
char *igress
= NULL
, *egress
= NULL
, *rr
= NULL
, *wr
= NULL
;
2219 int log_level
= LOG_DEBUG
; /* May be raised if resources consumed over a threshold */
2220 size_t n_message_parts
= 0, n_iovec
= 0;
2221 char* message_parts
[1 + 2 + 2 + 1], *t
;
2222 nsec_t nsec
= NSEC_INFINITY
;
2223 CGroupIPAccountingMetric m
;
2226 const char* const ip_fields
[_CGROUP_IP_ACCOUNTING_METRIC_MAX
] = {
2227 [CGROUP_IP_INGRESS_BYTES
] = "IP_METRIC_INGRESS_BYTES",
2228 [CGROUP_IP_INGRESS_PACKETS
] = "IP_METRIC_INGRESS_PACKETS",
2229 [CGROUP_IP_EGRESS_BYTES
] = "IP_METRIC_EGRESS_BYTES",
2230 [CGROUP_IP_EGRESS_PACKETS
] = "IP_METRIC_EGRESS_PACKETS",
2232 const char* const io_fields
[_CGROUP_IO_ACCOUNTING_METRIC_MAX
] = {
2233 [CGROUP_IO_READ_BYTES
] = "IO_METRIC_READ_BYTES",
2234 [CGROUP_IO_WRITE_BYTES
] = "IO_METRIC_WRITE_BYTES",
2235 [CGROUP_IO_READ_OPERATIONS
] = "IO_METRIC_READ_OPERATIONS",
2236 [CGROUP_IO_WRITE_OPERATIONS
] = "IO_METRIC_WRITE_OPERATIONS",
2241 /* Invoked whenever a unit enters failed or dead state. Logs information about consumed resources if resource
2242 * accounting was enabled for a unit. It does this in two ways: a friendly human readable string with reduced
2243 * information and the complete data in structured fields. */
2245 (void) unit_get_cpu_usage(u
, &nsec
);
2246 if (nsec
!= NSEC_INFINITY
) {
2247 char buf
[FORMAT_TIMESPAN_MAX
] = "";
2249 /* Format the CPU time for inclusion in the structured log message */
2250 if (asprintf(&t
, "CPU_USAGE_NSEC=%" PRIu64
, nsec
) < 0) {
2254 iovec
[n_iovec
++] = IOVEC_MAKE_STRING(t
);
2256 /* Format the CPU time for inclusion in the human language message string */
2257 format_timespan(buf
, sizeof(buf
), nsec
/ NSEC_PER_USEC
, USEC_PER_MSEC
);
2258 t
= strjoin("consumed ", buf
, " CPU time");
2264 message_parts
[n_message_parts
++] = t
;
2266 log_level
= raise_level(log_level
,
2267 nsec
> NOTICEWORTHY_CPU_NSEC
,
2268 nsec
> MENTIONWORTHY_CPU_NSEC
);
2271 for (CGroupIOAccountingMetric k
= 0; k
< _CGROUP_IO_ACCOUNTING_METRIC_MAX
; k
++) {
2272 char buf
[FORMAT_BYTES_MAX
] = "";
2273 uint64_t value
= UINT64_MAX
;
2275 assert(io_fields
[k
]);
2277 (void) unit_get_io_accounting(u
, k
, k
> 0, &value
);
2278 if (value
== UINT64_MAX
)
2281 have_io_accounting
= true;
2285 /* Format IO accounting data for inclusion in the structured log message */
2286 if (asprintf(&t
, "%s=%" PRIu64
, io_fields
[k
], value
) < 0) {
2290 iovec
[n_iovec
++] = IOVEC_MAKE_STRING(t
);
2292 /* Format the IO accounting data for inclusion in the human language message string, but only
2293 * for the bytes counters (and not for the operations counters) */
2294 if (k
== CGROUP_IO_READ_BYTES
) {
2296 rr
= strjoin("read ", format_bytes(buf
, sizeof(buf
), value
), " from disk");
2301 } else if (k
== CGROUP_IO_WRITE_BYTES
) {
2303 wr
= strjoin("written ", format_bytes(buf
, sizeof(buf
), value
), " to disk");
2310 if (IN_SET(k
, CGROUP_IO_READ_BYTES
, CGROUP_IO_WRITE_BYTES
))
2311 log_level
= raise_level(log_level
,
2312 value
> MENTIONWORTHY_IO_BYTES
,
2313 value
> NOTICEWORTHY_IO_BYTES
);
2316 if (have_io_accounting
) {
2319 message_parts
[n_message_parts
++] = TAKE_PTR(rr
);
2321 message_parts
[n_message_parts
++] = TAKE_PTR(wr
);
2326 k
= strdup("no IO");
2332 message_parts
[n_message_parts
++] = k
;
2336 for (m
= 0; m
< _CGROUP_IP_ACCOUNTING_METRIC_MAX
; m
++) {
2337 char buf
[FORMAT_BYTES_MAX
] = "";
2338 uint64_t value
= UINT64_MAX
;
2340 assert(ip_fields
[m
]);
2342 (void) unit_get_ip_accounting(u
, m
, &value
);
2343 if (value
== UINT64_MAX
)
2346 have_ip_accounting
= true;
2350 /* Format IP accounting data for inclusion in the structured log message */
2351 if (asprintf(&t
, "%s=%" PRIu64
, ip_fields
[m
], value
) < 0) {
2355 iovec
[n_iovec
++] = IOVEC_MAKE_STRING(t
);
2357 /* Format the IP accounting data for inclusion in the human language message string, but only for the
2358 * bytes counters (and not for the packets counters) */
2359 if (m
== CGROUP_IP_INGRESS_BYTES
) {
2361 igress
= strjoin("received ", format_bytes(buf
, sizeof(buf
), value
), " IP traffic");
2366 } else if (m
== CGROUP_IP_EGRESS_BYTES
) {
2368 egress
= strjoin("sent ", format_bytes(buf
, sizeof(buf
), value
), " IP traffic");
2375 if (IN_SET(m
, CGROUP_IP_INGRESS_BYTES
, CGROUP_IP_EGRESS_BYTES
))
2376 log_level
= raise_level(log_level
,
2377 value
> MENTIONWORTHY_IP_BYTES
,
2378 value
> NOTICEWORTHY_IP_BYTES
);
2381 if (have_ip_accounting
) {
2384 message_parts
[n_message_parts
++] = TAKE_PTR(igress
);
2386 message_parts
[n_message_parts
++] = TAKE_PTR(egress
);
2391 k
= strdup("no IP traffic");
2397 message_parts
[n_message_parts
++] = k
;
2401 /* Is there any accounting data available at all? */
2407 if (n_message_parts
== 0)
2408 t
= strjoina("MESSAGE=", u
->id
, ": Completed.");
2410 _cleanup_free_
char *joined
;
2412 message_parts
[n_message_parts
] = NULL
;
2414 joined
= strv_join(message_parts
, ", ");
2420 joined
[0] = ascii_toupper(joined
[0]);
2421 t
= strjoina("MESSAGE=", u
->id
, ": ", joined
, ".");
2424 /* The following four fields we allocate on the stack or are static strings, we hence don't want to free them,
2425 * and hence don't increase n_iovec for them */
2426 iovec
[n_iovec
] = IOVEC_MAKE_STRING(t
);
2427 iovec
[n_iovec
+ 1] = IOVEC_MAKE_STRING("MESSAGE_ID=" SD_MESSAGE_UNIT_RESOURCES_STR
);
2429 t
= strjoina(u
->manager
->unit_log_field
, u
->id
);
2430 iovec
[n_iovec
+ 2] = IOVEC_MAKE_STRING(t
);
2432 t
= strjoina(u
->manager
->invocation_log_field
, u
->invocation_id_string
);
2433 iovec
[n_iovec
+ 3] = IOVEC_MAKE_STRING(t
);
2435 log_struct_iovec(log_level
, iovec
, n_iovec
+ 4);
2439 for (i
= 0; i
< n_message_parts
; i
++)
2440 free(message_parts
[i
]);
2442 for (i
= 0; i
< n_iovec
; i
++)
2443 free(iovec
[i
].iov_base
);
2449 static void unit_update_on_console(Unit
*u
) {
2454 b
= unit_needs_console(u
);
2455 if (u
->on_console
== b
)
2460 manager_ref_console(u
->manager
);
2462 manager_unref_console(u
->manager
);
2465 static void unit_emit_audit_start(Unit
*u
) {
2468 if (u
->type
!= UNIT_SERVICE
)
2471 /* Write audit record if we have just finished starting up */
2472 manager_send_unit_audit(u
->manager
, u
, AUDIT_SERVICE_START
, true);
2476 static void unit_emit_audit_stop(Unit
*u
, UnitActiveState state
) {
2479 if (u
->type
!= UNIT_SERVICE
)
2483 /* Write audit record if we have just finished shutting down */
2484 manager_send_unit_audit(u
->manager
, u
, AUDIT_SERVICE_STOP
, state
== UNIT_INACTIVE
);
2485 u
->in_audit
= false;
2487 /* Hmm, if there was no start record written write it now, so that we always have a nice pair */
2488 manager_send_unit_audit(u
->manager
, u
, AUDIT_SERVICE_START
, state
== UNIT_INACTIVE
);
2490 if (state
== UNIT_INACTIVE
)
2491 manager_send_unit_audit(u
->manager
, u
, AUDIT_SERVICE_STOP
, true);
2495 static bool unit_process_job(Job
*j
, UnitActiveState ns
, UnitNotifyFlags flags
) {
2496 bool unexpected
= false;
2501 if (j
->state
== JOB_WAITING
)
2503 /* So we reached a different state for this job. Let's see if we can run it now if it failed previously
2505 job_add_to_run_queue(j
);
2507 /* Let's check whether the unit's new state constitutes a finished job, or maybe contradicts a running job and
2508 * hence needs to invalidate jobs. */
2513 case JOB_VERIFY_ACTIVE
:
2515 if (UNIT_IS_ACTIVE_OR_RELOADING(ns
))
2516 job_finish_and_invalidate(j
, JOB_DONE
, true, false);
2517 else if (j
->state
== JOB_RUNNING
&& ns
!= UNIT_ACTIVATING
) {
2520 if (UNIT_IS_INACTIVE_OR_FAILED(ns
)) {
2521 if (ns
== UNIT_FAILED
)
2522 result
= JOB_FAILED
;
2523 else if (FLAGS_SET(flags
, UNIT_NOTIFY_SKIP_CONDITION
))
2524 result
= JOB_SKIPPED
;
2528 job_finish_and_invalidate(j
, result
, true, false);
2535 case JOB_RELOAD_OR_START
:
2536 case JOB_TRY_RELOAD
:
2538 if (j
->state
== JOB_RUNNING
) {
2539 if (ns
== UNIT_ACTIVE
)
2540 job_finish_and_invalidate(j
, (flags
& UNIT_NOTIFY_RELOAD_FAILURE
) ? JOB_FAILED
: JOB_DONE
, true, false);
2541 else if (!IN_SET(ns
, UNIT_ACTIVATING
, UNIT_RELOADING
)) {
2544 if (UNIT_IS_INACTIVE_OR_FAILED(ns
))
2545 job_finish_and_invalidate(j
, ns
== UNIT_FAILED
? JOB_FAILED
: JOB_DONE
, true, false);
2553 case JOB_TRY_RESTART
:
2555 if (UNIT_IS_INACTIVE_OR_FAILED(ns
))
2556 job_finish_and_invalidate(j
, JOB_DONE
, true, false);
2557 else if (j
->state
== JOB_RUNNING
&& ns
!= UNIT_DEACTIVATING
) {
2559 job_finish_and_invalidate(j
, JOB_FAILED
, true, false);
2565 assert_not_reached("Job type unknown");
2571 void unit_notify(Unit
*u
, UnitActiveState os
, UnitActiveState ns
, UnitNotifyFlags flags
) {
2576 assert(os
< _UNIT_ACTIVE_STATE_MAX
);
2577 assert(ns
< _UNIT_ACTIVE_STATE_MAX
);
2579 /* Note that this is called for all low-level state changes, even if they might map to the same high-level
2580 * UnitActiveState! That means that ns == os is an expected behavior here. For example: if a mount point is
2581 * remounted this function will be called too! */
2585 /* Let's enqueue the change signal early. In case this unit has a job associated we want that this unit is in
2586 * the bus queue, so that any job change signal queued will force out the unit change signal first. */
2587 unit_add_to_dbus_queue(u
);
2589 /* Update timestamps for state changes */
2590 if (!MANAGER_IS_RELOADING(m
)) {
2591 dual_timestamp_get(&u
->state_change_timestamp
);
2593 if (UNIT_IS_INACTIVE_OR_FAILED(os
) && !UNIT_IS_INACTIVE_OR_FAILED(ns
))
2594 u
->inactive_exit_timestamp
= u
->state_change_timestamp
;
2595 else if (!UNIT_IS_INACTIVE_OR_FAILED(os
) && UNIT_IS_INACTIVE_OR_FAILED(ns
))
2596 u
->inactive_enter_timestamp
= u
->state_change_timestamp
;
2598 if (!UNIT_IS_ACTIVE_OR_RELOADING(os
) && UNIT_IS_ACTIVE_OR_RELOADING(ns
))
2599 u
->active_enter_timestamp
= u
->state_change_timestamp
;
2600 else if (UNIT_IS_ACTIVE_OR_RELOADING(os
) && !UNIT_IS_ACTIVE_OR_RELOADING(ns
))
2601 u
->active_exit_timestamp
= u
->state_change_timestamp
;
2604 /* Keep track of failed units */
2605 (void) manager_update_failed_units(m
, u
, ns
== UNIT_FAILED
);
2607 /* Make sure the cgroup and state files are always removed when we become inactive */
2608 if (UNIT_IS_INACTIVE_OR_FAILED(ns
)) {
2609 unit_prune_cgroup(u
);
2610 unit_unlink_state_files(u
);
2613 unit_update_on_console(u
);
2615 if (!MANAGER_IS_RELOADING(m
)) {
2618 /* Let's propagate state changes to the job */
2620 unexpected
= unit_process_job(u
->job
, ns
, flags
);
2624 /* If this state change happened without being requested by a job, then let's retroactively start or
2625 * stop dependencies. We skip that step when deserializing, since we don't want to create any
2626 * additional jobs just because something is already activated. */
2629 if (UNIT_IS_INACTIVE_OR_FAILED(os
) && UNIT_IS_ACTIVE_OR_ACTIVATING(ns
))
2630 retroactively_start_dependencies(u
);
2631 else if (UNIT_IS_ACTIVE_OR_ACTIVATING(os
) && UNIT_IS_INACTIVE_OR_DEACTIVATING(ns
))
2632 retroactively_stop_dependencies(u
);
2635 /* stop unneeded units regardless if going down was expected or not */
2636 if (UNIT_IS_INACTIVE_OR_FAILED(ns
))
2637 check_unneeded_dependencies(u
);
2639 if (ns
!= os
&& ns
== UNIT_FAILED
) {
2640 log_unit_debug(u
, "Unit entered failed state.");
2642 if (!(flags
& UNIT_NOTIFY_WILL_AUTO_RESTART
))
2643 unit_start_on_failure(u
);
2646 if (UNIT_IS_ACTIVE_OR_RELOADING(ns
) && !UNIT_IS_ACTIVE_OR_RELOADING(os
)) {
2647 /* This unit just finished starting up */
2649 unit_emit_audit_start(u
);
2650 manager_send_unit_plymouth(m
, u
);
2653 if (UNIT_IS_INACTIVE_OR_FAILED(ns
) && !UNIT_IS_INACTIVE_OR_FAILED(os
)) {
2654 /* This unit just stopped/failed. */
2656 unit_emit_audit_stop(u
, ns
);
2657 unit_log_resources(u
);
2661 manager_recheck_journal(m
);
2662 manager_recheck_dbus(m
);
2664 unit_trigger_notify(u
);
2666 if (!MANAGER_IS_RELOADING(m
)) {
2667 /* Maybe we finished startup and are now ready for being stopped because unneeded? */
2668 unit_submit_to_stop_when_unneeded_queue(u
);
2670 /* Maybe we finished startup, but something we needed has vanished? Let's die then. (This happens when
2671 * something BindsTo= to a Type=oneshot unit, as these units go directly from starting to inactive,
2672 * without ever entering started.) */
2673 unit_check_binds_to(u
);
2675 if (os
!= UNIT_FAILED
&& ns
== UNIT_FAILED
) {
2676 reason
= strjoina("unit ", u
->id
, " failed");
2677 emergency_action(m
, u
->failure_action
, 0, u
->reboot_arg
, unit_failure_action_exit_status(u
), reason
);
2678 } else if (!UNIT_IS_INACTIVE_OR_FAILED(os
) && ns
== UNIT_INACTIVE
) {
2679 reason
= strjoina("unit ", u
->id
, " succeeded");
2680 emergency_action(m
, u
->success_action
, 0, u
->reboot_arg
, unit_success_action_exit_status(u
), reason
);
2684 unit_add_to_gc_queue(u
);
2687 int unit_watch_pid(Unit
*u
, pid_t pid
, bool exclusive
) {
2691 assert(pid_is_valid(pid
));
2693 /* Watch a specific PID */
2695 /* Caller might be sure that this PID belongs to this unit only. Let's take this
2696 * opportunity to remove any stalled references to this PID as they can be created
2697 * easily (when watching a process which is not our direct child). */
2699 manager_unwatch_pid(u
->manager
, pid
);
2701 r
= set_ensure_allocated(&u
->pids
, NULL
);
2705 r
= hashmap_ensure_allocated(&u
->manager
->watch_pids
, NULL
);
2709 /* First try, let's add the unit keyed by "pid". */
2710 r
= hashmap_put(u
->manager
->watch_pids
, PID_TO_PTR(pid
), u
);
2716 /* OK, the "pid" key is already assigned to a different unit. Let's see if the "-pid" key (which points
2717 * to an array of Units rather than just a Unit), lists us already. */
2719 array
= hashmap_get(u
->manager
->watch_pids
, PID_TO_PTR(-pid
));
2721 for (; array
[n
]; n
++)
2725 if (found
) /* Found it already? if so, do nothing */
2730 /* Allocate a new array */
2731 new_array
= new(Unit
*, n
+ 2);
2735 memcpy_safe(new_array
, array
, sizeof(Unit
*) * n
);
2737 new_array
[n
+1] = NULL
;
2739 /* Add or replace the old array */
2740 r
= hashmap_replace(u
->manager
->watch_pids
, PID_TO_PTR(-pid
), new_array
);
2751 r
= set_put(u
->pids
, PID_TO_PTR(pid
));
2758 void unit_unwatch_pid(Unit
*u
, pid_t pid
) {
2762 assert(pid_is_valid(pid
));
2764 /* First let's drop the unit in case it's keyed as "pid". */
2765 (void) hashmap_remove_value(u
->manager
->watch_pids
, PID_TO_PTR(pid
), u
);
2767 /* Then, let's also drop the unit, in case it's in the array keyed by -pid */
2768 array
= hashmap_get(u
->manager
->watch_pids
, PID_TO_PTR(-pid
));
2772 /* Let's iterate through the array, dropping our own entry */
2773 for (n
= 0; array
[n
]; n
++)
2775 array
[m
++] = array
[n
];
2779 /* The array is now empty, remove the entire entry */
2780 assert_se(hashmap_remove(u
->manager
->watch_pids
, PID_TO_PTR(-pid
)) == array
);
2785 (void) set_remove(u
->pids
, PID_TO_PTR(pid
));
2788 void unit_unwatch_all_pids(Unit
*u
) {
2791 while (!set_isempty(u
->pids
))
2792 unit_unwatch_pid(u
, PTR_TO_PID(set_first(u
->pids
)));
2794 u
->pids
= set_free(u
->pids
);
2797 static void unit_tidy_watch_pids(Unit
*u
) {
2798 pid_t except1
, except2
;
2804 /* Cleans dead PIDs from our list */
2806 except1
= unit_main_pid(u
);
2807 except2
= unit_control_pid(u
);
2809 SET_FOREACH(e
, u
->pids
, i
) {
2810 pid_t pid
= PTR_TO_PID(e
);
2812 if (pid
== except1
|| pid
== except2
)
2815 if (!pid_is_unwaited(pid
))
2816 unit_unwatch_pid(u
, pid
);
2820 static int on_rewatch_pids_event(sd_event_source
*s
, void *userdata
) {
2826 unit_tidy_watch_pids(u
);
2827 unit_watch_all_pids(u
);
2829 /* If the PID set is empty now, then let's finish this off. */
2830 unit_synthesize_cgroup_empty_event(u
);
2835 int unit_enqueue_rewatch_pids(Unit
*u
) {
2840 if (!u
->cgroup_path
)
2843 r
= cg_unified_controller(SYSTEMD_CGROUP_CONTROLLER
);
2846 if (r
> 0) /* On unified we can use proper notifications */
2849 /* Enqueues a low-priority job that will clean up dead PIDs from our list of PIDs to watch and subscribe to new
2850 * PIDs that might have appeared. We do this in a delayed job because the work might be quite slow, as it
2851 * involves issuing kill(pid, 0) on all processes we watch. */
2853 if (!u
->rewatch_pids_event_source
) {
2854 _cleanup_(sd_event_source_unrefp
) sd_event_source
*s
= NULL
;
2856 r
= sd_event_add_defer(u
->manager
->event
, &s
, on_rewatch_pids_event
, u
);
2858 return log_error_errno(r
, "Failed to allocate event source for tidying watched PIDs: %m");
2860 r
= sd_event_source_set_priority(s
, SD_EVENT_PRIORITY_IDLE
);
2862 return log_error_errno(r
, "Failed to adjust priority of event source for tidying watched PIDs: %m");
2864 (void) sd_event_source_set_description(s
, "tidy-watch-pids");
2866 u
->rewatch_pids_event_source
= TAKE_PTR(s
);
2869 r
= sd_event_source_set_enabled(u
->rewatch_pids_event_source
, SD_EVENT_ONESHOT
);
2871 return log_error_errno(r
, "Failed to enable event source for tidying watched PIDs: %m");
2876 void unit_dequeue_rewatch_pids(Unit
*u
) {
2880 if (!u
->rewatch_pids_event_source
)
2883 r
= sd_event_source_set_enabled(u
->rewatch_pids_event_source
, SD_EVENT_OFF
);
2885 log_warning_errno(r
, "Failed to disable event source for tidying watched PIDs, ignoring: %m");
2887 u
->rewatch_pids_event_source
= sd_event_source_unref(u
->rewatch_pids_event_source
);
2890 bool unit_job_is_applicable(Unit
*u
, JobType j
) {
2892 assert(j
>= 0 && j
< _JOB_TYPE_MAX
);
2896 case JOB_VERIFY_ACTIVE
:
2899 /* Note that we don't check unit_can_start() here. That's because .device units and suchlike are not
2900 * startable by us but may appear due to external events, and it thus makes sense to permit enqueuing
2905 /* Similar as above. However, perpetual units can never be stopped (neither explicitly nor due to
2906 * external events), hence it makes no sense to permit enqueuing such a request either. */
2907 return !u
->perpetual
;
2910 case JOB_TRY_RESTART
:
2911 return unit_can_stop(u
) && unit_can_start(u
);
2914 case JOB_TRY_RELOAD
:
2915 return unit_can_reload(u
);
2917 case JOB_RELOAD_OR_START
:
2918 return unit_can_reload(u
) && unit_can_start(u
);
2921 assert_not_reached("Invalid job type");
2925 static void maybe_warn_about_dependency(Unit
*u
, const char *other
, UnitDependency dependency
) {
2928 /* Only warn about some unit types */
2929 if (!IN_SET(dependency
, UNIT_CONFLICTS
, UNIT_CONFLICTED_BY
, UNIT_BEFORE
, UNIT_AFTER
, UNIT_ON_FAILURE
, UNIT_TRIGGERS
, UNIT_TRIGGERED_BY
))
2932 if (streq_ptr(u
->id
, other
))
2933 log_unit_warning(u
, "Dependency %s=%s dropped", unit_dependency_to_string(dependency
), u
->id
);
2935 log_unit_warning(u
, "Dependency %s=%s dropped, merged into %s", unit_dependency_to_string(dependency
), strna(other
), u
->id
);
2938 static int unit_add_dependency_hashmap(
2941 UnitDependencyMask origin_mask
,
2942 UnitDependencyMask destination_mask
) {
2944 UnitDependencyInfo info
;
2949 assert(origin_mask
< _UNIT_DEPENDENCY_MASK_FULL
);
2950 assert(destination_mask
< _UNIT_DEPENDENCY_MASK_FULL
);
2951 assert(origin_mask
> 0 || destination_mask
> 0);
2953 r
= hashmap_ensure_allocated(h
, NULL
);
2957 assert_cc(sizeof(void*) == sizeof(info
));
2959 info
.data
= hashmap_get(*h
, other
);
2961 /* Entry already exists. Add in our mask. */
2963 if (FLAGS_SET(origin_mask
, info
.origin_mask
) &&
2964 FLAGS_SET(destination_mask
, info
.destination_mask
))
2967 info
.origin_mask
|= origin_mask
;
2968 info
.destination_mask
|= destination_mask
;
2970 r
= hashmap_update(*h
, other
, info
.data
);
2972 info
= (UnitDependencyInfo
) {
2973 .origin_mask
= origin_mask
,
2974 .destination_mask
= destination_mask
,
2977 r
= hashmap_put(*h
, other
, info
.data
);
2985 int unit_add_dependency(
2990 UnitDependencyMask mask
) {
2992 static const UnitDependency inverse_table
[_UNIT_DEPENDENCY_MAX
] = {
2993 [UNIT_REQUIRES
] = UNIT_REQUIRED_BY
,
2994 [UNIT_WANTS
] = UNIT_WANTED_BY
,
2995 [UNIT_REQUISITE
] = UNIT_REQUISITE_OF
,
2996 [UNIT_BINDS_TO
] = UNIT_BOUND_BY
,
2997 [UNIT_PART_OF
] = UNIT_CONSISTS_OF
,
2998 [UNIT_REQUIRED_BY
] = UNIT_REQUIRES
,
2999 [UNIT_REQUISITE_OF
] = UNIT_REQUISITE
,
3000 [UNIT_WANTED_BY
] = UNIT_WANTS
,
3001 [UNIT_BOUND_BY
] = UNIT_BINDS_TO
,
3002 [UNIT_CONSISTS_OF
] = UNIT_PART_OF
,
3003 [UNIT_CONFLICTS
] = UNIT_CONFLICTED_BY
,
3004 [UNIT_CONFLICTED_BY
] = UNIT_CONFLICTS
,
3005 [UNIT_BEFORE
] = UNIT_AFTER
,
3006 [UNIT_AFTER
] = UNIT_BEFORE
,
3007 [UNIT_ON_FAILURE
] = _UNIT_DEPENDENCY_INVALID
,
3008 [UNIT_REFERENCES
] = UNIT_REFERENCED_BY
,
3009 [UNIT_REFERENCED_BY
] = UNIT_REFERENCES
,
3010 [UNIT_TRIGGERS
] = UNIT_TRIGGERED_BY
,
3011 [UNIT_TRIGGERED_BY
] = UNIT_TRIGGERS
,
3012 [UNIT_PROPAGATES_RELOAD_TO
] = UNIT_RELOAD_PROPAGATED_FROM
,
3013 [UNIT_RELOAD_PROPAGATED_FROM
] = UNIT_PROPAGATES_RELOAD_TO
,
3014 [UNIT_JOINS_NAMESPACE_OF
] = UNIT_JOINS_NAMESPACE_OF
,
3016 Unit
*original_u
= u
, *original_other
= other
;
3020 assert(d
>= 0 && d
< _UNIT_DEPENDENCY_MAX
);
3023 u
= unit_follow_merge(u
);
3024 other
= unit_follow_merge(other
);
3026 /* We won't allow dependencies on ourselves. We will not
3027 * consider them an error however. */
3029 maybe_warn_about_dependency(original_u
, original_other
->id
, d
);
3033 if (d
== UNIT_AFTER
&& UNIT_VTABLE(u
)->refuse_after
) {
3034 log_unit_warning(u
, "Requested dependency After=%s ignored (%s units cannot be delayed).", other
->id
, unit_type_to_string(u
->type
));
3038 if (d
== UNIT_BEFORE
&& UNIT_VTABLE(other
)->refuse_after
) {
3039 log_unit_warning(u
, "Requested dependency Before=%s ignored (%s units cannot be delayed).", other
->id
, unit_type_to_string(other
->type
));
3043 if (d
== UNIT_ON_FAILURE
&& !UNIT_VTABLE(u
)->can_fail
) {
3044 log_unit_warning(u
, "Requested dependency OnFailure=%s ignored (%s units cannot fail).", other
->id
, unit_type_to_string(u
->type
));
3048 if (d
== UNIT_TRIGGERS
&& !UNIT_VTABLE(u
)->can_trigger
)
3049 return log_unit_error_errno(u
, SYNTHETIC_ERRNO(EINVAL
),
3050 "Requested dependency Triggers=%s refused (%s units cannot trigger other units).", other
->id
, unit_type_to_string(u
->type
));
3051 if (d
== UNIT_TRIGGERED_BY
&& !UNIT_VTABLE(other
)->can_trigger
)
3052 return log_unit_error_errno(u
, SYNTHETIC_ERRNO(EINVAL
),
3053 "Requested dependency TriggeredBy=%s refused (%s units cannot trigger other units).", other
->id
, unit_type_to_string(other
->type
));
3055 r
= unit_add_dependency_hashmap(u
->dependencies
+ d
, other
, mask
, 0);
3059 if (inverse_table
[d
] != _UNIT_DEPENDENCY_INVALID
&& inverse_table
[d
] != d
) {
3060 r
= unit_add_dependency_hashmap(other
->dependencies
+ inverse_table
[d
], u
, 0, mask
);
3065 if (add_reference
) {
3066 r
= unit_add_dependency_hashmap(u
->dependencies
+ UNIT_REFERENCES
, other
, mask
, 0);
3070 r
= unit_add_dependency_hashmap(other
->dependencies
+ UNIT_REFERENCED_BY
, u
, 0, mask
);
3075 unit_add_to_dbus_queue(u
);
3079 int unit_add_two_dependencies(Unit
*u
, UnitDependency d
, UnitDependency e
, Unit
*other
, bool add_reference
, UnitDependencyMask mask
) {
3084 r
= unit_add_dependency(u
, d
, other
, add_reference
, mask
);
3088 return unit_add_dependency(u
, e
, other
, add_reference
, mask
);
3091 static int resolve_template(Unit
*u
, const char *name
, char **buf
, const char **ret
) {
3099 if (!unit_name_is_valid(name
, UNIT_NAME_TEMPLATE
)) {
3106 r
= unit_name_replace_instance(name
, u
->instance
, buf
);
3108 _cleanup_free_
char *i
= NULL
;
3110 r
= unit_name_to_prefix(u
->id
, &i
);
3114 r
= unit_name_replace_instance(name
, i
, buf
);
3123 int unit_add_dependency_by_name(Unit
*u
, UnitDependency d
, const char *name
, bool add_reference
, UnitDependencyMask mask
) {
3124 _cleanup_free_
char *buf
= NULL
;
3131 r
= resolve_template(u
, name
, &buf
, &name
);
3135 r
= manager_load_unit(u
->manager
, name
, NULL
, NULL
, &other
);
3139 return unit_add_dependency(u
, d
, other
, add_reference
, mask
);
3142 int unit_add_two_dependencies_by_name(Unit
*u
, UnitDependency d
, UnitDependency e
, const char *name
, bool add_reference
, UnitDependencyMask mask
) {
3143 _cleanup_free_
char *buf
= NULL
;
3150 r
= resolve_template(u
, name
, &buf
, &name
);
3154 r
= manager_load_unit(u
->manager
, name
, NULL
, NULL
, &other
);
3158 return unit_add_two_dependencies(u
, d
, e
, other
, add_reference
, mask
);
3161 int set_unit_path(const char *p
) {
3162 /* This is mostly for debug purposes */
3163 if (setenv("SYSTEMD_UNIT_PATH", p
, 1) < 0)
3169 char *unit_dbus_path(Unit
*u
) {
3175 return unit_dbus_path_from_name(u
->id
);
3178 char *unit_dbus_path_invocation_id(Unit
*u
) {
3181 if (sd_id128_is_null(u
->invocation_id
))
3184 return unit_dbus_path_from_name(u
->invocation_id_string
);
3187 int unit_set_slice(Unit
*u
, Unit
*slice
) {
3191 /* Sets the unit slice if it has not been set before. Is extra
3192 * careful, to only allow this for units that actually have a
3193 * cgroup context. Also, we don't allow to set this for slices
3194 * (since the parent slice is derived from the name). Make
3195 * sure the unit we set is actually a slice. */
3197 if (!UNIT_HAS_CGROUP_CONTEXT(u
))
3200 if (u
->type
== UNIT_SLICE
)
3203 if (unit_active_state(u
) != UNIT_INACTIVE
)
3206 if (slice
->type
!= UNIT_SLICE
)
3209 if (unit_has_name(u
, SPECIAL_INIT_SCOPE
) &&
3210 !unit_has_name(slice
, SPECIAL_ROOT_SLICE
))
3213 if (UNIT_DEREF(u
->slice
) == slice
)
3216 /* Disallow slice changes if @u is already bound to cgroups */
3217 if (UNIT_ISSET(u
->slice
) && u
->cgroup_realized
)
3220 unit_ref_set(&u
->slice
, u
, slice
);
3224 int unit_set_default_slice(Unit
*u
) {
3225 const char *slice_name
;
3231 if (UNIT_ISSET(u
->slice
))
3235 _cleanup_free_
char *prefix
= NULL
, *escaped
= NULL
;
3237 /* Implicitly place all instantiated units in their
3238 * own per-template slice */
3240 r
= unit_name_to_prefix(u
->id
, &prefix
);
3244 /* The prefix is already escaped, but it might include
3245 * "-" which has a special meaning for slice units,
3246 * hence escape it here extra. */
3247 escaped
= unit_name_escape(prefix
);
3251 if (MANAGER_IS_SYSTEM(u
->manager
))
3252 slice_name
= strjoina("system-", escaped
, ".slice");
3254 slice_name
= strjoina(escaped
, ".slice");
3257 MANAGER_IS_SYSTEM(u
->manager
) && !unit_has_name(u
, SPECIAL_INIT_SCOPE
)
3258 ? SPECIAL_SYSTEM_SLICE
3259 : SPECIAL_ROOT_SLICE
;
3261 r
= manager_load_unit(u
->manager
, slice_name
, NULL
, NULL
, &slice
);
3265 return unit_set_slice(u
, slice
);
3268 const char *unit_slice_name(Unit
*u
) {
3271 if (!UNIT_ISSET(u
->slice
))
3274 return UNIT_DEREF(u
->slice
)->id
;
3277 int unit_load_related_unit(Unit
*u
, const char *type
, Unit
**_found
) {
3278 _cleanup_free_
char *t
= NULL
;
3285 r
= unit_name_change_suffix(u
->id
, type
, &t
);
3288 if (unit_has_name(u
, t
))
3291 r
= manager_load_unit(u
->manager
, t
, NULL
, NULL
, _found
);
3292 assert(r
< 0 || *_found
!= u
);
3296 static int signal_name_owner_changed(sd_bus_message
*message
, void *userdata
, sd_bus_error
*error
) {
3297 const char *new_owner
;
3304 r
= sd_bus_message_read(message
, "sss", NULL
, NULL
, &new_owner
);
3306 bus_log_parse_error(r
);
3310 if (UNIT_VTABLE(u
)->bus_name_owner_change
)
3311 UNIT_VTABLE(u
)->bus_name_owner_change(u
, empty_to_null(new_owner
));
3316 static int get_name_owner_handler(sd_bus_message
*message
, void *userdata
, sd_bus_error
*error
) {
3317 const sd_bus_error
*e
;
3318 const char *new_owner
;
3325 u
->get_name_owner_slot
= sd_bus_slot_unref(u
->get_name_owner_slot
);
3327 e
= sd_bus_message_get_error(message
);
3329 if (!sd_bus_error_has_name(e
, "org.freedesktop.DBus.Error.NameHasNoOwner"))
3330 log_unit_error(u
, "Unexpected error response from GetNameOwner(): %s", e
->message
);
3334 r
= sd_bus_message_read(message
, "s", &new_owner
);
3336 return bus_log_parse_error(r
);
3338 assert(!isempty(new_owner
));
3341 if (UNIT_VTABLE(u
)->bus_name_owner_change
)
3342 UNIT_VTABLE(u
)->bus_name_owner_change(u
, new_owner
);
3347 int unit_install_bus_match(Unit
*u
, sd_bus
*bus
, const char *name
) {
3355 if (u
->match_bus_slot
|| u
->get_name_owner_slot
)
3358 match
= strjoina("type='signal',"
3359 "sender='org.freedesktop.DBus',"
3360 "path='/org/freedesktop/DBus',"
3361 "interface='org.freedesktop.DBus',"
3362 "member='NameOwnerChanged',"
3363 "arg0='", name
, "'");
3365 r
= sd_bus_add_match_async(bus
, &u
->match_bus_slot
, match
, signal_name_owner_changed
, NULL
, u
);
3369 r
= sd_bus_call_method_async(
3371 &u
->get_name_owner_slot
,
3372 "org.freedesktop.DBus",
3373 "/org/freedesktop/DBus",
3374 "org.freedesktop.DBus",
3376 get_name_owner_handler
,
3380 u
->match_bus_slot
= sd_bus_slot_unref(u
->match_bus_slot
);
3384 log_unit_debug(u
, "Watching D-Bus name '%s'.", name
);
3388 int unit_watch_bus_name(Unit
*u
, const char *name
) {
3394 /* Watch a specific name on the bus. We only support one unit
3395 * watching each name for now. */
3397 if (u
->manager
->api_bus
) {
3398 /* If the bus is already available, install the match directly.
3399 * Otherwise, just put the name in the list. bus_setup_api() will take care later. */
3400 r
= unit_install_bus_match(u
, u
->manager
->api_bus
, name
);
3402 return log_warning_errno(r
, "Failed to subscribe to NameOwnerChanged signal for '%s': %m", name
);
3405 r
= hashmap_put(u
->manager
->watch_bus
, name
, u
);
3407 u
->match_bus_slot
= sd_bus_slot_unref(u
->match_bus_slot
);
3408 u
->get_name_owner_slot
= sd_bus_slot_unref(u
->get_name_owner_slot
);
3409 return log_warning_errno(r
, "Failed to put bus name to hashmap: %m");
3415 void unit_unwatch_bus_name(Unit
*u
, const char *name
) {
3419 (void) hashmap_remove_value(u
->manager
->watch_bus
, name
, u
);
3420 u
->match_bus_slot
= sd_bus_slot_unref(u
->match_bus_slot
);
3421 u
->get_name_owner_slot
= sd_bus_slot_unref(u
->get_name_owner_slot
);
3424 bool unit_can_serialize(Unit
*u
) {
3427 return UNIT_VTABLE(u
)->serialize
&& UNIT_VTABLE(u
)->deserialize_item
;
3430 static int serialize_cgroup_mask(FILE *f
, const char *key
, CGroupMask mask
) {
3431 _cleanup_free_
char *s
= NULL
;
3440 r
= cg_mask_to_string(mask
, &s
);
3442 return log_error_errno(r
, "Failed to format cgroup mask: %m");
3444 return serialize_item(f
, key
, s
);
3447 static const char *const ip_accounting_metric_field
[_CGROUP_IP_ACCOUNTING_METRIC_MAX
] = {
3448 [CGROUP_IP_INGRESS_BYTES
] = "ip-accounting-ingress-bytes",
3449 [CGROUP_IP_INGRESS_PACKETS
] = "ip-accounting-ingress-packets",
3450 [CGROUP_IP_EGRESS_BYTES
] = "ip-accounting-egress-bytes",
3451 [CGROUP_IP_EGRESS_PACKETS
] = "ip-accounting-egress-packets",
3454 static const char *const io_accounting_metric_field_base
[_CGROUP_IO_ACCOUNTING_METRIC_MAX
] = {
3455 [CGROUP_IO_READ_BYTES
] = "io-accounting-read-bytes-base",
3456 [CGROUP_IO_WRITE_BYTES
] = "io-accounting-write-bytes-base",
3457 [CGROUP_IO_READ_OPERATIONS
] = "io-accounting-read-operations-base",
3458 [CGROUP_IO_WRITE_OPERATIONS
] = "io-accounting-write-operations-base",
3461 static const char *const io_accounting_metric_field_last
[_CGROUP_IO_ACCOUNTING_METRIC_MAX
] = {
3462 [CGROUP_IO_READ_BYTES
] = "io-accounting-read-bytes-last",
3463 [CGROUP_IO_WRITE_BYTES
] = "io-accounting-write-bytes-last",
3464 [CGROUP_IO_READ_OPERATIONS
] = "io-accounting-read-operations-last",
3465 [CGROUP_IO_WRITE_OPERATIONS
] = "io-accounting-write-operations-last",
3468 int unit_serialize(Unit
*u
, FILE *f
, FDSet
*fds
, bool serialize_jobs
) {
3469 CGroupIPAccountingMetric m
;
3476 if (unit_can_serialize(u
)) {
3477 r
= UNIT_VTABLE(u
)->serialize(u
, f
, fds
);
3482 (void) serialize_dual_timestamp(f
, "state-change-timestamp", &u
->state_change_timestamp
);
3484 (void) serialize_dual_timestamp(f
, "inactive-exit-timestamp", &u
->inactive_exit_timestamp
);
3485 (void) serialize_dual_timestamp(f
, "active-enter-timestamp", &u
->active_enter_timestamp
);
3486 (void) serialize_dual_timestamp(f
, "active-exit-timestamp", &u
->active_exit_timestamp
);
3487 (void) serialize_dual_timestamp(f
, "inactive-enter-timestamp", &u
->inactive_enter_timestamp
);
3489 (void) serialize_dual_timestamp(f
, "condition-timestamp", &u
->condition_timestamp
);
3490 (void) serialize_dual_timestamp(f
, "assert-timestamp", &u
->assert_timestamp
);
3492 if (dual_timestamp_is_set(&u
->condition_timestamp
))
3493 (void) serialize_bool(f
, "condition-result", u
->condition_result
);
3495 if (dual_timestamp_is_set(&u
->assert_timestamp
))
3496 (void) serialize_bool(f
, "assert-result", u
->assert_result
);
3498 (void) serialize_bool(f
, "transient", u
->transient
);
3499 (void) serialize_bool(f
, "in-audit", u
->in_audit
);
3501 (void) serialize_bool(f
, "exported-invocation-id", u
->exported_invocation_id
);
3502 (void) serialize_bool(f
, "exported-log-level-max", u
->exported_log_level_max
);
3503 (void) serialize_bool(f
, "exported-log-extra-fields", u
->exported_log_extra_fields
);
3504 (void) serialize_bool(f
, "exported-log-rate-limit-interval", u
->exported_log_ratelimit_interval
);
3505 (void) serialize_bool(f
, "exported-log-rate-limit-burst", u
->exported_log_ratelimit_burst
);
3507 (void) serialize_item_format(f
, "cpu-usage-base", "%" PRIu64
, u
->cpu_usage_base
);
3508 if (u
->cpu_usage_last
!= NSEC_INFINITY
)
3509 (void) serialize_item_format(f
, "cpu-usage-last", "%" PRIu64
, u
->cpu_usage_last
);
3511 if (u
->oom_kill_last
> 0)
3512 (void) serialize_item_format(f
, "oom-kill-last", "%" PRIu64
, u
->oom_kill_last
);
3514 for (CGroupIOAccountingMetric im
= 0; im
< _CGROUP_IO_ACCOUNTING_METRIC_MAX
; im
++) {
3515 (void) serialize_item_format(f
, io_accounting_metric_field_base
[im
], "%" PRIu64
, u
->io_accounting_base
[im
]);
3517 if (u
->io_accounting_last
[im
] != UINT64_MAX
)
3518 (void) serialize_item_format(f
, io_accounting_metric_field_last
[im
], "%" PRIu64
, u
->io_accounting_last
[im
]);
3522 (void) serialize_item(f
, "cgroup", u
->cgroup_path
);
3524 (void) serialize_bool(f
, "cgroup-realized", u
->cgroup_realized
);
3525 (void) serialize_cgroup_mask(f
, "cgroup-realized-mask", u
->cgroup_realized_mask
);
3526 (void) serialize_cgroup_mask(f
, "cgroup-enabled-mask", u
->cgroup_enabled_mask
);
3527 (void) serialize_cgroup_mask(f
, "cgroup-invalidated-mask", u
->cgroup_invalidated_mask
);
3529 if (uid_is_valid(u
->ref_uid
))
3530 (void) serialize_item_format(f
, "ref-uid", UID_FMT
, u
->ref_uid
);
3531 if (gid_is_valid(u
->ref_gid
))
3532 (void) serialize_item_format(f
, "ref-gid", GID_FMT
, u
->ref_gid
);
3534 if (!sd_id128_is_null(u
->invocation_id
))
3535 (void) serialize_item_format(f
, "invocation-id", SD_ID128_FORMAT_STR
, SD_ID128_FORMAT_VAL(u
->invocation_id
));
3537 (void) serialize_item_format(f
, "freezer-state", "%s", freezer_state_to_string(unit_freezer_state(u
)));
3539 bus_track_serialize(u
->bus_track
, f
, "ref");
3541 for (m
= 0; m
< _CGROUP_IP_ACCOUNTING_METRIC_MAX
; m
++) {
3544 r
= unit_get_ip_accounting(u
, m
, &v
);
3546 (void) serialize_item_format(f
, ip_accounting_metric_field
[m
], "%" PRIu64
, v
);
3549 if (serialize_jobs
) {
3552 job_serialize(u
->job
, f
);
3557 job_serialize(u
->nop_job
, f
);
3566 static int unit_deserialize_job(Unit
*u
, FILE *f
) {
3567 _cleanup_(job_freep
) Job
*j
= NULL
;
3577 r
= job_deserialize(j
, f
);
3581 r
= job_install_deserialized(j
);
3589 int unit_deserialize(Unit
*u
, FILE *f
, FDSet
*fds
) {
3597 _cleanup_free_
char *line
= NULL
;
3602 r
= read_line(f
, LONG_LINE_MAX
, &line
);
3604 return log_error_errno(r
, "Failed to read serialization line: %m");
3605 if (r
== 0) /* eof */
3609 if (isempty(l
)) /* End marker */
3612 k
= strcspn(l
, "=");
3620 if (streq(l
, "job")) {
3622 /* New-style serialized job */
3623 r
= unit_deserialize_job(u
, f
);
3626 } else /* Legacy for pre-44 */
3627 log_unit_warning(u
, "Update from too old systemd versions are unsupported, cannot deserialize job: %s", v
);
3629 } else if (streq(l
, "state-change-timestamp")) {
3630 (void) deserialize_dual_timestamp(v
, &u
->state_change_timestamp
);
3632 } else if (streq(l
, "inactive-exit-timestamp")) {
3633 (void) deserialize_dual_timestamp(v
, &u
->inactive_exit_timestamp
);
3635 } else if (streq(l
, "active-enter-timestamp")) {
3636 (void) deserialize_dual_timestamp(v
, &u
->active_enter_timestamp
);
3638 } else if (streq(l
, "active-exit-timestamp")) {
3639 (void) deserialize_dual_timestamp(v
, &u
->active_exit_timestamp
);
3641 } else if (streq(l
, "inactive-enter-timestamp")) {
3642 (void) deserialize_dual_timestamp(v
, &u
->inactive_enter_timestamp
);
3644 } else if (streq(l
, "condition-timestamp")) {
3645 (void) deserialize_dual_timestamp(v
, &u
->condition_timestamp
);
3647 } else if (streq(l
, "assert-timestamp")) {
3648 (void) deserialize_dual_timestamp(v
, &u
->assert_timestamp
);
3650 } else if (streq(l
, "condition-result")) {
3652 r
= parse_boolean(v
);
3654 log_unit_debug(u
, "Failed to parse condition result value %s, ignoring.", v
);
3656 u
->condition_result
= r
;
3660 } else if (streq(l
, "assert-result")) {
3662 r
= parse_boolean(v
);
3664 log_unit_debug(u
, "Failed to parse assert result value %s, ignoring.", v
);
3666 u
->assert_result
= r
;
3670 } else if (streq(l
, "transient")) {
3672 r
= parse_boolean(v
);
3674 log_unit_debug(u
, "Failed to parse transient bool %s, ignoring.", v
);
3680 } else if (streq(l
, "in-audit")) {
3682 r
= parse_boolean(v
);
3684 log_unit_debug(u
, "Failed to parse in-audit bool %s, ignoring.", v
);
3690 } else if (streq(l
, "exported-invocation-id")) {
3692 r
= parse_boolean(v
);
3694 log_unit_debug(u
, "Failed to parse exported invocation ID bool %s, ignoring.", v
);
3696 u
->exported_invocation_id
= r
;
3700 } else if (streq(l
, "exported-log-level-max")) {
3702 r
= parse_boolean(v
);
3704 log_unit_debug(u
, "Failed to parse exported log level max bool %s, ignoring.", v
);
3706 u
->exported_log_level_max
= r
;
3710 } else if (streq(l
, "exported-log-extra-fields")) {
3712 r
= parse_boolean(v
);
3714 log_unit_debug(u
, "Failed to parse exported log extra fields bool %s, ignoring.", v
);
3716 u
->exported_log_extra_fields
= r
;
3720 } else if (streq(l
, "exported-log-rate-limit-interval")) {
3722 r
= parse_boolean(v
);
3724 log_unit_debug(u
, "Failed to parse exported log rate limit interval %s, ignoring.", v
);
3726 u
->exported_log_ratelimit_interval
= r
;
3730 } else if (streq(l
, "exported-log-rate-limit-burst")) {
3732 r
= parse_boolean(v
);
3734 log_unit_debug(u
, "Failed to parse exported log rate limit burst %s, ignoring.", v
);
3736 u
->exported_log_ratelimit_burst
= r
;
3740 } else if (STR_IN_SET(l
, "cpu-usage-base", "cpuacct-usage-base")) {
3742 r
= safe_atou64(v
, &u
->cpu_usage_base
);
3744 log_unit_debug(u
, "Failed to parse CPU usage base %s, ignoring.", v
);
3748 } else if (streq(l
, "cpu-usage-last")) {
3750 r
= safe_atou64(v
, &u
->cpu_usage_last
);
3752 log_unit_debug(u
, "Failed to read CPU usage last %s, ignoring.", v
);
3756 } else if (streq(l
, "oom-kill-last")) {
3758 r
= safe_atou64(v
, &u
->oom_kill_last
);
3760 log_unit_debug(u
, "Failed to read OOM kill last %s, ignoring.", v
);
3764 } else if (streq(l
, "cgroup")) {
3766 r
= unit_set_cgroup_path(u
, v
);
3768 log_unit_debug_errno(u
, r
, "Failed to set cgroup path %s, ignoring: %m", v
);
3770 (void) unit_watch_cgroup(u
);
3771 (void) unit_watch_cgroup_memory(u
);
3774 } else if (streq(l
, "cgroup-realized")) {
3777 b
= parse_boolean(v
);
3779 log_unit_debug(u
, "Failed to parse cgroup-realized bool %s, ignoring.", v
);
3781 u
->cgroup_realized
= b
;
3785 } else if (streq(l
, "cgroup-realized-mask")) {
3787 r
= cg_mask_from_string(v
, &u
->cgroup_realized_mask
);
3789 log_unit_debug(u
, "Failed to parse cgroup-realized-mask %s, ignoring.", v
);
3792 } else if (streq(l
, "cgroup-enabled-mask")) {
3794 r
= cg_mask_from_string(v
, &u
->cgroup_enabled_mask
);
3796 log_unit_debug(u
, "Failed to parse cgroup-enabled-mask %s, ignoring.", v
);
3799 } else if (streq(l
, "cgroup-invalidated-mask")) {
3801 r
= cg_mask_from_string(v
, &u
->cgroup_invalidated_mask
);
3803 log_unit_debug(u
, "Failed to parse cgroup-invalidated-mask %s, ignoring.", v
);
3806 } else if (streq(l
, "ref-uid")) {
3809 r
= parse_uid(v
, &uid
);
3811 log_unit_debug(u
, "Failed to parse referenced UID %s, ignoring.", v
);
3813 unit_ref_uid_gid(u
, uid
, GID_INVALID
);
3817 } else if (streq(l
, "ref-gid")) {
3820 r
= parse_gid(v
, &gid
);
3822 log_unit_debug(u
, "Failed to parse referenced GID %s, ignoring.", v
);
3824 unit_ref_uid_gid(u
, UID_INVALID
, gid
);
3828 } else if (streq(l
, "ref")) {
3830 r
= strv_extend(&u
->deserialized_refs
, v
);
3835 } else if (streq(l
, "invocation-id")) {
3838 r
= sd_id128_from_string(v
, &id
);
3840 log_unit_debug(u
, "Failed to parse invocation id %s, ignoring.", v
);
3842 r
= unit_set_invocation_id(u
, id
);
3844 log_unit_warning_errno(u
, r
, "Failed to set invocation ID for unit: %m");
3848 } else if (streq(l
, "freezer-state")) {
3851 s
= freezer_state_from_string(v
);
3853 log_unit_debug(u
, "Failed to deserialize freezer-state '%s', ignoring.", v
);
3855 u
->freezer_state
= s
;
3860 /* Check if this is an IP accounting metric serialization field */
3861 m
= string_table_lookup(ip_accounting_metric_field
, ELEMENTSOF(ip_accounting_metric_field
), l
);
3865 r
= safe_atou64(v
, &c
);
3867 log_unit_debug(u
, "Failed to parse IP accounting value %s, ignoring.", v
);
3869 u
->ip_accounting_extra
[m
] = c
;
3873 m
= string_table_lookup(io_accounting_metric_field_base
, ELEMENTSOF(io_accounting_metric_field_base
), l
);
3877 r
= safe_atou64(v
, &c
);
3879 log_unit_debug(u
, "Failed to parse IO accounting base value %s, ignoring.", v
);
3881 u
->io_accounting_base
[m
] = c
;
3885 m
= string_table_lookup(io_accounting_metric_field_last
, ELEMENTSOF(io_accounting_metric_field_last
), l
);
3889 r
= safe_atou64(v
, &c
);
3891 log_unit_debug(u
, "Failed to parse IO accounting last value %s, ignoring.", v
);
3893 u
->io_accounting_last
[m
] = c
;
3897 if (unit_can_serialize(u
)) {
3898 r
= exec_runtime_deserialize_compat(u
, l
, v
, fds
);
3900 log_unit_warning(u
, "Failed to deserialize runtime parameter '%s', ignoring.", l
);
3904 /* Returns positive if key was handled by the call */
3908 r
= UNIT_VTABLE(u
)->deserialize_item(u
, l
, v
, fds
);
3910 log_unit_warning(u
, "Failed to deserialize unit parameter '%s', ignoring.", l
);
3914 /* Versions before 228 did not carry a state change timestamp. In this case, take the current time. This is
3915 * useful, so that timeouts based on this timestamp don't trigger too early, and is in-line with the logic from
3916 * before 228 where the base for timeouts was not persistent across reboots. */
3918 if (!dual_timestamp_is_set(&u
->state_change_timestamp
))
3919 dual_timestamp_get(&u
->state_change_timestamp
);
3921 /* Let's make sure that everything that is deserialized also gets any potential new cgroup settings applied
3922 * after we are done. For that we invalidate anything already realized, so that we can realize it again. */
3923 unit_invalidate_cgroup(u
, _CGROUP_MASK_ALL
);
3924 unit_invalidate_cgroup_bpf(u
);
3929 int unit_deserialize_skip(FILE *f
) {
3933 /* Skip serialized data for this unit. We don't know what it is. */
3936 _cleanup_free_
char *line
= NULL
;
3939 r
= read_line(f
, LONG_LINE_MAX
, &line
);
3941 return log_error_errno(r
, "Failed to read serialization line: %m");
3953 int unit_add_node_dependency(Unit
*u
, const char *what
, UnitDependency dep
, UnitDependencyMask mask
) {
3954 _cleanup_free_
char *e
= NULL
;
3960 /* Adds in links to the device node that this unit is based on */
3964 if (!is_device_path(what
))
3967 /* When device units aren't supported (such as in a container), don't create dependencies on them. */
3968 if (!unit_type_supported(UNIT_DEVICE
))
3971 r
= unit_name_from_path(what
, ".device", &e
);
3975 r
= manager_load_unit(u
->manager
, e
, NULL
, NULL
, &device
);
3979 if (dep
== UNIT_REQUIRES
&& device_shall_be_bound_by(device
, u
))
3980 dep
= UNIT_BINDS_TO
;
3982 return unit_add_two_dependencies(u
, UNIT_AFTER
,
3983 MANAGER_IS_SYSTEM(u
->manager
) ? dep
: UNIT_WANTS
,
3984 device
, true, mask
);
3987 int unit_add_blockdev_dependency(Unit
*u
, const char *what
, UnitDependencyMask mask
) {
3988 _cleanup_free_
char *escaped
= NULL
, *target
= NULL
;
3996 if (!path_startswith(what
, "/dev/"))
3999 /* If we don't support devices, then also don't bother with blockdev@.target */
4000 if (!unit_type_supported(UNIT_DEVICE
))
4003 r
= unit_name_path_escape(what
, &escaped
);
4007 r
= unit_name_build("blockdev", escaped
, ".target", &target
);
4011 return unit_add_dependency_by_name(u
, UNIT_AFTER
, target
, true, mask
);
4014 int unit_coldplug(Unit
*u
) {
4021 /* Make sure we don't enter a loop, when coldplugging recursively. */
4025 u
->coldplugged
= true;
4027 STRV_FOREACH(i
, u
->deserialized_refs
) {
4028 q
= bus_unit_track_add_name(u
, *i
);
4029 if (q
< 0 && r
>= 0)
4032 u
->deserialized_refs
= strv_free(u
->deserialized_refs
);
4034 if (UNIT_VTABLE(u
)->coldplug
) {
4035 q
= UNIT_VTABLE(u
)->coldplug(u
);
4036 if (q
< 0 && r
>= 0)
4040 uj
= u
->job
?: u
->nop_job
;
4042 q
= job_coldplug(uj
);
4043 if (q
< 0 && r
>= 0)
4050 void unit_catchup(Unit
*u
) {
4053 if (UNIT_VTABLE(u
)->catchup
)
4054 UNIT_VTABLE(u
)->catchup(u
);
4057 static bool fragment_mtime_newer(const char *path
, usec_t mtime
, bool path_masked
) {
4063 /* If the source is some virtual kernel file system, then we assume we watch it anyway, and hence pretend we
4064 * are never out-of-date. */
4065 if (PATH_STARTSWITH_SET(path
, "/proc", "/sys"))
4068 if (stat(path
, &st
) < 0)
4069 /* What, cannot access this anymore? */
4073 /* For masked files check if they are still so */
4074 return !null_or_empty(&st
);
4076 /* For non-empty files check the mtime */
4077 return timespec_load(&st
.st_mtim
) > mtime
;
4082 bool unit_need_daemon_reload(Unit
*u
) {
4083 _cleanup_strv_free_
char **t
= NULL
;
4088 /* For unit files, we allow masking… */
4089 if (fragment_mtime_newer(u
->fragment_path
, u
->fragment_mtime
,
4090 u
->load_state
== UNIT_MASKED
))
4093 /* Source paths should not be masked… */
4094 if (fragment_mtime_newer(u
->source_path
, u
->source_mtime
, false))
4097 if (u
->load_state
== UNIT_LOADED
)
4098 (void) unit_find_dropin_paths(u
, &t
);
4099 if (!strv_equal(u
->dropin_paths
, t
))
4102 /* … any drop-ins that are masked are simply omitted from the list. */
4103 STRV_FOREACH(path
, u
->dropin_paths
)
4104 if (fragment_mtime_newer(*path
, u
->dropin_mtime
, false))
4110 void unit_reset_failed(Unit
*u
) {
4113 if (UNIT_VTABLE(u
)->reset_failed
)
4114 UNIT_VTABLE(u
)->reset_failed(u
);
4116 ratelimit_reset(&u
->start_ratelimit
);
4117 u
->start_limit_hit
= false;
4120 Unit
*unit_following(Unit
*u
) {
4123 if (UNIT_VTABLE(u
)->following
)
4124 return UNIT_VTABLE(u
)->following(u
);
4129 bool unit_stop_pending(Unit
*u
) {
4132 /* This call does check the current state of the unit. It's
4133 * hence useful to be called from state change calls of the
4134 * unit itself, where the state isn't updated yet. This is
4135 * different from unit_inactive_or_pending() which checks both
4136 * the current state and for a queued job. */
4138 return unit_has_job_type(u
, JOB_STOP
);
4141 bool unit_inactive_or_pending(Unit
*u
) {
4144 /* Returns true if the unit is inactive or going down */
4146 if (UNIT_IS_INACTIVE_OR_DEACTIVATING(unit_active_state(u
)))
4149 if (unit_stop_pending(u
))
4155 bool unit_active_or_pending(Unit
*u
) {
4158 /* Returns true if the unit is active or going up */
4160 if (UNIT_IS_ACTIVE_OR_ACTIVATING(unit_active_state(u
)))
4164 IN_SET(u
->job
->type
, JOB_START
, JOB_RELOAD_OR_START
, JOB_RESTART
))
4170 bool unit_will_restart_default(Unit
*u
) {
4173 return unit_has_job_type(u
, JOB_START
);
4176 bool unit_will_restart(Unit
*u
) {
4179 if (!UNIT_VTABLE(u
)->will_restart
)
4182 return UNIT_VTABLE(u
)->will_restart(u
);
4185 int unit_kill(Unit
*u
, KillWho w
, int signo
, sd_bus_error
*error
) {
4187 assert(w
>= 0 && w
< _KILL_WHO_MAX
);
4188 assert(SIGNAL_VALID(signo
));
4190 if (!UNIT_VTABLE(u
)->kill
)
4193 return UNIT_VTABLE(u
)->kill(u
, w
, signo
, error
);
4196 static Set
*unit_pid_set(pid_t main_pid
, pid_t control_pid
) {
4197 _cleanup_set_free_ Set
*pid_set
= NULL
;
4200 pid_set
= set_new(NULL
);
4204 /* Exclude the main/control pids from being killed via the cgroup */
4206 r
= set_put(pid_set
, PID_TO_PTR(main_pid
));
4211 if (control_pid
> 0) {
4212 r
= set_put(pid_set
, PID_TO_PTR(control_pid
));
4217 return TAKE_PTR(pid_set
);
4220 int unit_kill_common(
4226 sd_bus_error
*error
) {
4229 bool killed
= false;
4231 if (IN_SET(who
, KILL_MAIN
, KILL_MAIN_FAIL
)) {
4233 return sd_bus_error_setf(error
, BUS_ERROR_NO_SUCH_PROCESS
, "%s units have no main processes", unit_type_to_string(u
->type
));
4234 else if (main_pid
== 0)
4235 return sd_bus_error_set_const(error
, BUS_ERROR_NO_SUCH_PROCESS
, "No main process to kill");
4238 if (IN_SET(who
, KILL_CONTROL
, KILL_CONTROL_FAIL
)) {
4239 if (control_pid
< 0)
4240 return sd_bus_error_setf(error
, BUS_ERROR_NO_SUCH_PROCESS
, "%s units have no control processes", unit_type_to_string(u
->type
));
4241 else if (control_pid
== 0)
4242 return sd_bus_error_set_const(error
, BUS_ERROR_NO_SUCH_PROCESS
, "No control process to kill");
4245 if (IN_SET(who
, KILL_CONTROL
, KILL_CONTROL_FAIL
, KILL_ALL
, KILL_ALL_FAIL
))
4246 if (control_pid
> 0) {
4247 if (kill(control_pid
, signo
) < 0)
4253 if (IN_SET(who
, KILL_MAIN
, KILL_MAIN_FAIL
, KILL_ALL
, KILL_ALL_FAIL
))
4255 if (kill(main_pid
, signo
) < 0)
4261 if (IN_SET(who
, KILL_ALL
, KILL_ALL_FAIL
) && u
->cgroup_path
) {
4262 _cleanup_set_free_ Set
*pid_set
= NULL
;
4265 /* Exclude the main/control pids from being killed via the cgroup */
4266 pid_set
= unit_pid_set(main_pid
, control_pid
);
4270 q
= cg_kill_recursive(SYSTEMD_CGROUP_CONTROLLER
, u
->cgroup_path
, signo
, 0, pid_set
, NULL
, NULL
);
4271 if (q
< 0 && !IN_SET(q
, -EAGAIN
, -ESRCH
, -ENOENT
))
4277 if (r
== 0 && !killed
&& IN_SET(who
, KILL_ALL_FAIL
, KILL_CONTROL_FAIL
))
4283 int unit_following_set(Unit
*u
, Set
**s
) {
4287 if (UNIT_VTABLE(u
)->following_set
)
4288 return UNIT_VTABLE(u
)->following_set(u
, s
);
4294 UnitFileState
unit_get_unit_file_state(Unit
*u
) {
4299 if (u
->unit_file_state
< 0 && u
->fragment_path
) {
4300 r
= unit_file_get_state(
4301 u
->manager
->unit_file_scope
,
4304 &u
->unit_file_state
);
4306 u
->unit_file_state
= UNIT_FILE_BAD
;
4309 return u
->unit_file_state
;
4312 int unit_get_unit_file_preset(Unit
*u
) {
4315 if (u
->unit_file_preset
< 0 && u
->fragment_path
)
4316 u
->unit_file_preset
= unit_file_query_preset(
4317 u
->manager
->unit_file_scope
,
4319 basename(u
->fragment_path
),
4322 return u
->unit_file_preset
;
4325 Unit
* unit_ref_set(UnitRef
*ref
, Unit
*source
, Unit
*target
) {
4331 unit_ref_unset(ref
);
4333 ref
->source
= source
;
4334 ref
->target
= target
;
4335 LIST_PREPEND(refs_by_target
, target
->refs_by_target
, ref
);
4339 void unit_ref_unset(UnitRef
*ref
) {
4345 /* We are about to drop a reference to the unit, make sure the garbage collection has a look at it as it might
4346 * be unreferenced now. */
4347 unit_add_to_gc_queue(ref
->target
);
4349 LIST_REMOVE(refs_by_target
, ref
->target
->refs_by_target
, ref
);
4350 ref
->source
= ref
->target
= NULL
;
4353 static int user_from_unit_name(Unit
*u
, char **ret
) {
4355 static const uint8_t hash_key
[] = {
4356 0x58, 0x1a, 0xaf, 0xe6, 0x28, 0x58, 0x4e, 0x96,
4357 0xb4, 0x4e, 0xf5, 0x3b, 0x8c, 0x92, 0x07, 0xec
4360 _cleanup_free_
char *n
= NULL
;
4363 r
= unit_name_to_prefix(u
->id
, &n
);
4367 if (valid_user_group_name(n
, 0)) {
4372 /* If we can't use the unit name as a user name, then let's hash it and use that */
4373 if (asprintf(ret
, "_du%016" PRIx64
, siphash24(n
, strlen(n
), hash_key
)) < 0)
4379 int unit_patch_contexts(Unit
*u
) {
4387 /* Patch in the manager defaults into the exec and cgroup
4388 * contexts, _after_ the rest of the settings have been
4391 ec
= unit_get_exec_context(u
);
4393 /* This only copies in the ones that need memory */
4394 for (i
= 0; i
< _RLIMIT_MAX
; i
++)
4395 if (u
->manager
->rlimit
[i
] && !ec
->rlimit
[i
]) {
4396 ec
->rlimit
[i
] = newdup(struct rlimit
, u
->manager
->rlimit
[i
], 1);
4401 if (MANAGER_IS_USER(u
->manager
) &&
4402 !ec
->working_directory
) {
4404 r
= get_home_dir(&ec
->working_directory
);
4408 /* Allow user services to run, even if the
4409 * home directory is missing */
4410 ec
->working_directory_missing_ok
= true;
4413 if (ec
->private_devices
)
4414 ec
->capability_bounding_set
&= ~((UINT64_C(1) << CAP_MKNOD
) | (UINT64_C(1) << CAP_SYS_RAWIO
));
4416 if (ec
->protect_kernel_modules
)
4417 ec
->capability_bounding_set
&= ~(UINT64_C(1) << CAP_SYS_MODULE
);
4419 if (ec
->protect_kernel_logs
)
4420 ec
->capability_bounding_set
&= ~(UINT64_C(1) << CAP_SYSLOG
);
4422 if (ec
->protect_clock
)
4423 ec
->capability_bounding_set
&= ~((UINT64_C(1) << CAP_SYS_TIME
) | (UINT64_C(1) << CAP_WAKE_ALARM
));
4425 if (ec
->dynamic_user
) {
4427 r
= user_from_unit_name(u
, &ec
->user
);
4433 ec
->group
= strdup(ec
->user
);
4438 /* If the dynamic user option is on, let's make sure that the unit can't leave its
4439 * UID/GID around in the file system or on IPC objects. Hence enforce a strict
4442 ec
->private_tmp
= true;
4443 ec
->remove_ipc
= true;
4444 ec
->protect_system
= PROTECT_SYSTEM_STRICT
;
4445 if (ec
->protect_home
== PROTECT_HOME_NO
)
4446 ec
->protect_home
= PROTECT_HOME_READ_ONLY
;
4448 /* Make sure this service can neither benefit from SUID/SGID binaries nor create
4450 ec
->no_new_privileges
= true;
4451 ec
->restrict_suid_sgid
= true;
4455 cc
= unit_get_cgroup_context(u
);
4458 if (ec
->private_devices
&&
4459 cc
->device_policy
== CGROUP_DEVICE_POLICY_AUTO
)
4460 cc
->device_policy
= CGROUP_DEVICE_POLICY_CLOSED
;
4462 if (ec
->root_image
&&
4463 (cc
->device_policy
!= CGROUP_DEVICE_POLICY_AUTO
|| cc
->device_allow
)) {
4465 /* When RootImage= is specified, the following devices are touched. */
4466 r
= cgroup_add_device_allow(cc
, "/dev/loop-control", "rw");
4470 r
= cgroup_add_device_allow(cc
, "block-loop", "rwm");
4474 r
= cgroup_add_device_allow(cc
, "block-blkext", "rwm");
4478 /* Make sure "block-loop" can be resolved, i.e. make sure "loop" shows up in /proc/devices */
4479 r
= unit_add_two_dependencies_by_name(u
, UNIT_AFTER
, UNIT_WANTS
, "modprobe@loop.service", true, UNIT_DEPENDENCY_FILE
);
4484 if (ec
->protect_clock
) {
4485 r
= cgroup_add_device_allow(cc
, "char-rtc", "r");
4494 ExecContext
*unit_get_exec_context(Unit
*u
) {
4501 offset
= UNIT_VTABLE(u
)->exec_context_offset
;
4505 return (ExecContext
*) ((uint8_t*) u
+ offset
);
4508 KillContext
*unit_get_kill_context(Unit
*u
) {
4515 offset
= UNIT_VTABLE(u
)->kill_context_offset
;
4519 return (KillContext
*) ((uint8_t*) u
+ offset
);
4522 CGroupContext
*unit_get_cgroup_context(Unit
*u
) {
4528 offset
= UNIT_VTABLE(u
)->cgroup_context_offset
;
4532 return (CGroupContext
*) ((uint8_t*) u
+ offset
);
4535 ExecRuntime
*unit_get_exec_runtime(Unit
*u
) {
4541 offset
= UNIT_VTABLE(u
)->exec_runtime_offset
;
4545 return *(ExecRuntime
**) ((uint8_t*) u
+ offset
);
4548 static const char* unit_drop_in_dir(Unit
*u
, UnitWriteFlags flags
) {
4551 if (UNIT_WRITE_FLAGS_NOOP(flags
))
4554 if (u
->transient
) /* Redirect drop-ins for transient units always into the transient directory. */
4555 return u
->manager
->lookup_paths
.transient
;
4557 if (flags
& UNIT_PERSISTENT
)
4558 return u
->manager
->lookup_paths
.persistent_control
;
4560 if (flags
& UNIT_RUNTIME
)
4561 return u
->manager
->lookup_paths
.runtime_control
;
4566 char* unit_escape_setting(const char *s
, UnitWriteFlags flags
, char **buf
) {
4572 /* Escapes the input string as requested. Returns the escaped string. If 'buf' is specified then the allocated
4573 * return buffer pointer is also written to *buf, except if no escaping was necessary, in which case *buf is
4574 * set to NULL, and the input pointer is returned as-is. This means the return value always contains a properly
4575 * escaped version, but *buf when passed only contains a pointer if an allocation was necessary. If *buf is
4576 * not specified, then the return value always needs to be freed. Callers can use this to optimize memory
4579 if (flags
& UNIT_ESCAPE_SPECIFIERS
) {
4580 ret
= specifier_escape(s
);
4587 if (flags
& UNIT_ESCAPE_C
) {
4600 return ret
?: (char*) s
;
4603 return ret
?: strdup(s
);
4606 char* unit_concat_strv(char **l
, UnitWriteFlags flags
) {
4607 _cleanup_free_
char *result
= NULL
;
4608 size_t n
= 0, allocated
= 0;
4611 /* Takes a list of strings, escapes them, and concatenates them. This may be used to format command lines in a
4612 * way suitable for ExecStart= stanzas */
4614 STRV_FOREACH(i
, l
) {
4615 _cleanup_free_
char *buf
= NULL
;
4620 p
= unit_escape_setting(*i
, flags
, &buf
);
4624 a
= (n
> 0) + 1 + strlen(p
) + 1; /* separating space + " + entry + " */
4625 if (!GREEDY_REALLOC(result
, allocated
, n
+ a
+ 1))
4639 if (!GREEDY_REALLOC(result
, allocated
, n
+ 1))
4644 return TAKE_PTR(result
);
4647 int unit_write_setting(Unit
*u
, UnitWriteFlags flags
, const char *name
, const char *data
) {
4648 _cleanup_free_
char *p
= NULL
, *q
= NULL
, *escaped
= NULL
;
4649 const char *dir
, *wrapped
;
4656 if (UNIT_WRITE_FLAGS_NOOP(flags
))
4659 data
= unit_escape_setting(data
, flags
, &escaped
);
4663 /* Prefix the section header. If we are writing this out as transient file, then let's suppress this if the
4664 * previous section header is the same */
4666 if (flags
& UNIT_PRIVATE
) {
4667 if (!UNIT_VTABLE(u
)->private_section
)
4670 if (!u
->transient_file
|| u
->last_section_private
< 0)
4671 data
= strjoina("[", UNIT_VTABLE(u
)->private_section
, "]\n", data
);
4672 else if (u
->last_section_private
== 0)
4673 data
= strjoina("\n[", UNIT_VTABLE(u
)->private_section
, "]\n", data
);
4675 if (!u
->transient_file
|| u
->last_section_private
< 0)
4676 data
= strjoina("[Unit]\n", data
);
4677 else if (u
->last_section_private
> 0)
4678 data
= strjoina("\n[Unit]\n", data
);
4681 if (u
->transient_file
) {
4682 /* When this is a transient unit file in creation, then let's not create a new drop-in but instead
4683 * write to the transient unit file. */
4684 fputs(data
, u
->transient_file
);
4686 if (!endswith(data
, "\n"))
4687 fputc('\n', u
->transient_file
);
4689 /* Remember which section we wrote this entry to */
4690 u
->last_section_private
= !!(flags
& UNIT_PRIVATE
);
4694 dir
= unit_drop_in_dir(u
, flags
);
4698 wrapped
= strjoina("# This is a drop-in unit file extension, created via \"systemctl set-property\"\n"
4699 "# or an equivalent operation. Do not edit.\n",
4703 r
= drop_in_file(dir
, u
->id
, 50, name
, &p
, &q
);
4707 (void) mkdir_p_label(p
, 0755);
4709 /* Make sure the drop-in dir is registered in our path cache. This way we don't need to stupidly
4710 * recreate the cache after every drop-in we write. */
4711 if (u
->manager
->unit_path_cache
) {
4712 r
= set_put_strdup(&u
->manager
->unit_path_cache
, p
);
4717 r
= write_string_file_atomic_label(q
, wrapped
);
4721 r
= strv_push(&u
->dropin_paths
, q
);
4726 strv_uniq(u
->dropin_paths
);
4728 u
->dropin_mtime
= now(CLOCK_REALTIME
);
4733 int unit_write_settingf(Unit
*u
, UnitWriteFlags flags
, const char *name
, const char *format
, ...) {
4734 _cleanup_free_
char *p
= NULL
;
4742 if (UNIT_WRITE_FLAGS_NOOP(flags
))
4745 va_start(ap
, format
);
4746 r
= vasprintf(&p
, format
, ap
);
4752 return unit_write_setting(u
, flags
, name
, p
);
4755 int unit_make_transient(Unit
*u
) {
4756 _cleanup_free_
char *path
= NULL
;
4761 if (!UNIT_VTABLE(u
)->can_transient
)
4764 (void) mkdir_p_label(u
->manager
->lookup_paths
.transient
, 0755);
4766 path
= path_join(u
->manager
->lookup_paths
.transient
, u
->id
);
4770 /* Let's open the file we'll write the transient settings into. This file is kept open as long as we are
4771 * creating the transient, and is closed in unit_load(), as soon as we start loading the file. */
4773 RUN_WITH_UMASK(0022) {
4774 f
= fopen(path
, "we");
4779 safe_fclose(u
->transient_file
);
4780 u
->transient_file
= f
;
4782 free_and_replace(u
->fragment_path
, path
);
4784 u
->source_path
= mfree(u
->source_path
);
4785 u
->dropin_paths
= strv_free(u
->dropin_paths
);
4786 u
->fragment_mtime
= u
->source_mtime
= u
->dropin_mtime
= 0;
4788 u
->load_state
= UNIT_STUB
;
4790 u
->transient
= true;
4792 unit_add_to_dbus_queue(u
);
4793 unit_add_to_gc_queue(u
);
4795 fputs("# This is a transient unit file, created programmatically via the systemd API. Do not edit.\n",
4801 static int log_kill(pid_t pid
, int sig
, void *userdata
) {
4802 _cleanup_free_
char *comm
= NULL
;
4804 (void) get_process_comm(pid
, &comm
);
4806 /* Don't log about processes marked with brackets, under the assumption that these are temporary processes
4807 only, like for example systemd's own PAM stub process. */
4808 if (comm
&& comm
[0] == '(')
4811 log_unit_notice(userdata
,
4812 "Killing process " PID_FMT
" (%s) with signal SIG%s.",
4815 signal_to_string(sig
));
4820 static int operation_to_signal(const KillContext
*c
, KillOperation k
, bool *noteworthy
) {
4825 case KILL_TERMINATE
:
4826 case KILL_TERMINATE_AND_LOG
:
4827 *noteworthy
= false;
4828 return c
->kill_signal
;
4831 *noteworthy
= false;
4832 return restart_kill_signal(c
);
4836 return c
->final_kill_signal
;
4840 return c
->watchdog_signal
;
4843 assert_not_reached("KillOperation unknown");
4847 int unit_kill_context(
4853 bool main_pid_alien
) {
4855 bool wait_for_exit
= false, send_sighup
;
4856 cg_kill_log_func_t log_func
= NULL
;
4862 /* Kill the processes belonging to this unit, in preparation for shutting the unit down.
4863 * Returns > 0 if we killed something worth waiting for, 0 otherwise. */
4865 if (c
->kill_mode
== KILL_NONE
)
4869 sig
= operation_to_signal(c
, k
, ¬eworthy
);
4871 log_func
= log_kill
;
4875 IN_SET(k
, KILL_TERMINATE
, KILL_TERMINATE_AND_LOG
) &&
4880 log_func(main_pid
, sig
, u
);
4882 r
= kill_and_sigcont(main_pid
, sig
);
4883 if (r
< 0 && r
!= -ESRCH
) {
4884 _cleanup_free_
char *comm
= NULL
;
4885 (void) get_process_comm(main_pid
, &comm
);
4887 log_unit_warning_errno(u
, r
, "Failed to kill main process " PID_FMT
" (%s), ignoring: %m", main_pid
, strna(comm
));
4889 if (!main_pid_alien
)
4890 wait_for_exit
= true;
4892 if (r
!= -ESRCH
&& send_sighup
)
4893 (void) kill(main_pid
, SIGHUP
);
4897 if (control_pid
> 0) {
4899 log_func(control_pid
, sig
, u
);
4901 r
= kill_and_sigcont(control_pid
, sig
);
4902 if (r
< 0 && r
!= -ESRCH
) {
4903 _cleanup_free_
char *comm
= NULL
;
4904 (void) get_process_comm(control_pid
, &comm
);
4906 log_unit_warning_errno(u
, r
, "Failed to kill control process " PID_FMT
" (%s), ignoring: %m", control_pid
, strna(comm
));
4908 wait_for_exit
= true;
4910 if (r
!= -ESRCH
&& send_sighup
)
4911 (void) kill(control_pid
, SIGHUP
);
4915 if (u
->cgroup_path
&&
4916 (c
->kill_mode
== KILL_CONTROL_GROUP
|| (c
->kill_mode
== KILL_MIXED
&& k
== KILL_KILL
))) {
4917 _cleanup_set_free_ Set
*pid_set
= NULL
;
4919 /* Exclude the main/control pids from being killed via the cgroup */
4920 pid_set
= unit_pid_set(main_pid
, control_pid
);
4924 r
= cg_kill_recursive(SYSTEMD_CGROUP_CONTROLLER
, u
->cgroup_path
,
4926 CGROUP_SIGCONT
|CGROUP_IGNORE_SELF
,
4930 if (!IN_SET(r
, -EAGAIN
, -ESRCH
, -ENOENT
))
4931 log_unit_warning_errno(u
, r
, "Failed to kill control group %s, ignoring: %m", u
->cgroup_path
);
4935 /* FIXME: For now, on the legacy hierarchy, we will not wait for the cgroup members to die if
4936 * we are running in a container or if this is a delegation unit, simply because cgroup
4937 * notification is unreliable in these cases. It doesn't work at all in containers, and outside
4938 * of containers it can be confused easily by left-over directories in the cgroup — which
4939 * however should not exist in non-delegated units. On the unified hierarchy that's different,
4940 * there we get proper events. Hence rely on them. */
4942 if (cg_unified_controller(SYSTEMD_CGROUP_CONTROLLER
) > 0 ||
4943 (detect_container() == 0 && !unit_cgroup_delegate(u
)))
4944 wait_for_exit
= true;
4949 pid_set
= unit_pid_set(main_pid
, control_pid
);
4953 cg_kill_recursive(SYSTEMD_CGROUP_CONTROLLER
, u
->cgroup_path
,
4962 return wait_for_exit
;
4965 int unit_require_mounts_for(Unit
*u
, const char *path
, UnitDependencyMask mask
) {
4966 _cleanup_free_
char *p
= NULL
;
4967 UnitDependencyInfo di
;
4973 /* Registers a unit for requiring a certain path and all its prefixes. We keep a hashtable of these paths in
4974 * the unit (from the path to the UnitDependencyInfo structure indicating how to the dependency came to
4975 * be). However, we build a prefix table for all possible prefixes so that new appearing mount units can easily
4976 * determine which units to make themselves a dependency of. */
4978 if (!path_is_absolute(path
))
4981 r
= hashmap_ensure_allocated(&u
->requires_mounts_for
, &path_hash_ops
);
4989 path
= path_simplify(p
, true);
4991 if (!path_is_normalized(path
))
4994 if (hashmap_contains(u
->requires_mounts_for
, path
))
4997 di
= (UnitDependencyInfo
) {
5001 r
= hashmap_put(u
->requires_mounts_for
, path
, di
.data
);
5006 char prefix
[strlen(path
) + 1];
5007 PATH_FOREACH_PREFIX_MORE(prefix
, path
) {
5010 x
= hashmap_get(u
->manager
->units_requiring_mounts_for
, prefix
);
5012 _cleanup_free_
char *q
= NULL
;
5014 r
= hashmap_ensure_allocated(&u
->manager
->units_requiring_mounts_for
, &path_hash_ops
);
5026 r
= hashmap_put(u
->manager
->units_requiring_mounts_for
, q
, x
);
5042 int unit_setup_exec_runtime(Unit
*u
) {
5050 offset
= UNIT_VTABLE(u
)->exec_runtime_offset
;
5053 /* Check if there already is an ExecRuntime for this unit? */
5054 rt
= (ExecRuntime
**) ((uint8_t*) u
+ offset
);
5058 /* Try to get it from somebody else */
5059 HASHMAP_FOREACH_KEY(v
, other
, u
->dependencies
[UNIT_JOINS_NAMESPACE_OF
], i
) {
5060 r
= exec_runtime_acquire(u
->manager
, NULL
, other
->id
, false, rt
);
5065 return exec_runtime_acquire(u
->manager
, unit_get_exec_context(u
), u
->id
, true, rt
);
5068 int unit_setup_dynamic_creds(Unit
*u
) {
5070 DynamicCreds
*dcreds
;
5075 offset
= UNIT_VTABLE(u
)->dynamic_creds_offset
;
5077 dcreds
= (DynamicCreds
*) ((uint8_t*) u
+ offset
);
5079 ec
= unit_get_exec_context(u
);
5082 if (!ec
->dynamic_user
)
5085 return dynamic_creds_acquire(dcreds
, u
->manager
, ec
->user
, ec
->group
);
5088 bool unit_type_supported(UnitType t
) {
5089 if (_unlikely_(t
< 0))
5091 if (_unlikely_(t
>= _UNIT_TYPE_MAX
))
5094 if (!unit_vtable
[t
]->supported
)
5097 return unit_vtable
[t
]->supported();
5100 void unit_warn_if_dir_nonempty(Unit
*u
, const char* where
) {
5106 r
= dir_is_empty(where
);
5107 if (r
> 0 || r
== -ENOTDIR
)
5110 log_unit_warning_errno(u
, r
, "Failed to check directory %s: %m", where
);
5114 log_struct(LOG_NOTICE
,
5115 "MESSAGE_ID=" SD_MESSAGE_OVERMOUNTING_STR
,
5117 LOG_UNIT_INVOCATION_ID(u
),
5118 LOG_UNIT_MESSAGE(u
, "Directory %s to mount over is not empty, mounting anyway.", where
),
5122 int unit_fail_if_noncanonical(Unit
*u
, const char* where
) {
5123 _cleanup_free_
char *canonical_where
= NULL
;
5129 r
= chase_symlinks(where
, NULL
, CHASE_NONEXISTENT
, &canonical_where
, NULL
);
5131 log_unit_debug_errno(u
, r
, "Failed to check %s for symlinks, ignoring: %m", where
);
5135 /* We will happily ignore a trailing slash (or any redundant slashes) */
5136 if (path_equal(where
, canonical_where
))
5139 /* No need to mention "." or "..", they would already have been rejected by unit_name_from_path() */
5141 "MESSAGE_ID=" SD_MESSAGE_OVERMOUNTING_STR
,
5143 LOG_UNIT_INVOCATION_ID(u
),
5144 LOG_UNIT_MESSAGE(u
, "Mount path %s is not canonical (contains a symlink).", where
),
5150 bool unit_is_pristine(Unit
*u
) {
5153 /* Check if the unit already exists or is already around,
5154 * in a number of different ways. Note that to cater for unit
5155 * types such as slice, we are generally fine with units that
5156 * are marked UNIT_LOADED even though nothing was actually
5157 * loaded, as those unit types don't require a file on disk. */
5159 return !(!IN_SET(u
->load_state
, UNIT_NOT_FOUND
, UNIT_LOADED
) ||
5162 !strv_isempty(u
->dropin_paths
) ||
5167 pid_t
unit_control_pid(Unit
*u
) {
5170 if (UNIT_VTABLE(u
)->control_pid
)
5171 return UNIT_VTABLE(u
)->control_pid(u
);
5176 pid_t
unit_main_pid(Unit
*u
) {
5179 if (UNIT_VTABLE(u
)->main_pid
)
5180 return UNIT_VTABLE(u
)->main_pid(u
);
5185 static void unit_unref_uid_internal(
5189 void (*_manager_unref_uid
)(Manager
*m
, uid_t uid
, bool destroy_now
)) {
5193 assert(_manager_unref_uid
);
5195 /* Generic implementation of both unit_unref_uid() and unit_unref_gid(), under the assumption that uid_t and
5196 * gid_t are actually the same time, with the same validity rules.
5198 * Drops a reference to UID/GID from a unit. */
5200 assert_cc(sizeof(uid_t
) == sizeof(gid_t
));
5201 assert_cc(UID_INVALID
== (uid_t
) GID_INVALID
);
5203 if (!uid_is_valid(*ref_uid
))
5206 _manager_unref_uid(u
->manager
, *ref_uid
, destroy_now
);
5207 *ref_uid
= UID_INVALID
;
5210 static void unit_unref_uid(Unit
*u
, bool destroy_now
) {
5211 unit_unref_uid_internal(u
, &u
->ref_uid
, destroy_now
, manager_unref_uid
);
5214 static void unit_unref_gid(Unit
*u
, bool destroy_now
) {
5215 unit_unref_uid_internal(u
, (uid_t
*) &u
->ref_gid
, destroy_now
, manager_unref_gid
);
5218 void unit_unref_uid_gid(Unit
*u
, bool destroy_now
) {
5221 unit_unref_uid(u
, destroy_now
);
5222 unit_unref_gid(u
, destroy_now
);
5225 static int unit_ref_uid_internal(
5230 int (*_manager_ref_uid
)(Manager
*m
, uid_t uid
, bool clean_ipc
)) {
5236 assert(uid_is_valid(uid
));
5237 assert(_manager_ref_uid
);
5239 /* Generic implementation of both unit_ref_uid() and unit_ref_guid(), under the assumption that uid_t and gid_t
5240 * are actually the same type, and have the same validity rules.
5242 * Adds a reference on a specific UID/GID to this unit. Each unit referencing the same UID/GID maintains a
5243 * reference so that we can destroy the UID/GID's IPC resources as soon as this is requested and the counter
5246 assert_cc(sizeof(uid_t
) == sizeof(gid_t
));
5247 assert_cc(UID_INVALID
== (uid_t
) GID_INVALID
);
5249 if (*ref_uid
== uid
)
5252 if (uid_is_valid(*ref_uid
)) /* Already set? */
5255 r
= _manager_ref_uid(u
->manager
, uid
, clean_ipc
);
5263 static int unit_ref_uid(Unit
*u
, uid_t uid
, bool clean_ipc
) {
5264 return unit_ref_uid_internal(u
, &u
->ref_uid
, uid
, clean_ipc
, manager_ref_uid
);
5267 static int unit_ref_gid(Unit
*u
, gid_t gid
, bool clean_ipc
) {
5268 return unit_ref_uid_internal(u
, (uid_t
*) &u
->ref_gid
, (uid_t
) gid
, clean_ipc
, manager_ref_gid
);
5271 static int unit_ref_uid_gid_internal(Unit
*u
, uid_t uid
, gid_t gid
, bool clean_ipc
) {
5276 /* Reference both a UID and a GID in one go. Either references both, or neither. */
5278 if (uid_is_valid(uid
)) {
5279 r
= unit_ref_uid(u
, uid
, clean_ipc
);
5284 if (gid_is_valid(gid
)) {
5285 q
= unit_ref_gid(u
, gid
, clean_ipc
);
5288 unit_unref_uid(u
, false);
5294 return r
> 0 || q
> 0;
5297 int unit_ref_uid_gid(Unit
*u
, uid_t uid
, gid_t gid
) {
5303 c
= unit_get_exec_context(u
);
5305 r
= unit_ref_uid_gid_internal(u
, uid
, gid
, c
? c
->remove_ipc
: false);
5307 return log_unit_warning_errno(u
, r
, "Couldn't add UID/GID reference to unit, proceeding without: %m");
5312 void unit_notify_user_lookup(Unit
*u
, uid_t uid
, gid_t gid
) {
5317 /* This is invoked whenever one of the forked off processes let's us know the UID/GID its user name/group names
5318 * resolved to. We keep track of which UID/GID is currently assigned in order to be able to destroy its IPC
5319 * objects when no service references the UID/GID anymore. */
5321 r
= unit_ref_uid_gid(u
, uid
, gid
);
5323 unit_add_to_dbus_queue(u
);
5326 int unit_set_invocation_id(Unit
*u
, sd_id128_t id
) {
5331 /* Set the invocation ID for this unit. If we cannot, this will not roll back, but reset the whole thing. */
5333 if (sd_id128_equal(u
->invocation_id
, id
))
5336 if (!sd_id128_is_null(u
->invocation_id
))
5337 (void) hashmap_remove_value(u
->manager
->units_by_invocation_id
, &u
->invocation_id
, u
);
5339 if (sd_id128_is_null(id
)) {
5344 r
= hashmap_ensure_allocated(&u
->manager
->units_by_invocation_id
, &id128_hash_ops
);
5348 u
->invocation_id
= id
;
5349 sd_id128_to_string(id
, u
->invocation_id_string
);
5351 r
= hashmap_put(u
->manager
->units_by_invocation_id
, &u
->invocation_id
, u
);
5358 u
->invocation_id
= SD_ID128_NULL
;
5359 u
->invocation_id_string
[0] = 0;
5363 int unit_acquire_invocation_id(Unit
*u
) {
5369 r
= sd_id128_randomize(&id
);
5371 return log_unit_error_errno(u
, r
, "Failed to generate invocation ID for unit: %m");
5373 r
= unit_set_invocation_id(u
, id
);
5375 return log_unit_error_errno(u
, r
, "Failed to set invocation ID for unit: %m");
5377 unit_add_to_dbus_queue(u
);
5381 int unit_set_exec_params(Unit
*u
, ExecParameters
*p
) {
5387 /* Copy parameters from manager */
5388 r
= manager_get_effective_environment(u
->manager
, &p
->environment
);
5392 p
->confirm_spawn
= manager_get_confirm_spawn(u
->manager
);
5393 p
->cgroup_supported
= u
->manager
->cgroup_supported
;
5394 p
->prefix
= u
->manager
->prefix
;
5395 SET_FLAG(p
->flags
, EXEC_PASS_LOG_UNIT
|EXEC_CHOWN_DIRECTORIES
, MANAGER_IS_SYSTEM(u
->manager
));
5397 /* Copy parameters from unit */
5398 p
->cgroup_path
= u
->cgroup_path
;
5399 SET_FLAG(p
->flags
, EXEC_CGROUP_DELEGATE
, unit_cgroup_delegate(u
));
5404 int unit_fork_helper_process(Unit
*u
, const char *name
, pid_t
*ret
) {
5410 /* Forks off a helper process and makes sure it is a member of the unit's cgroup. Returns == 0 in the child,
5411 * and > 0 in the parent. The pid parameter is always filled in with the child's PID. */
5413 (void) unit_realize_cgroup(u
);
5415 r
= safe_fork(name
, FORK_REOPEN_LOG
, ret
);
5419 (void) default_signals(SIGNALS_CRASH_HANDLER
, SIGNALS_IGNORE
, -1);
5420 (void) ignore_signals(SIGPIPE
, -1);
5422 (void) prctl(PR_SET_PDEATHSIG
, SIGTERM
);
5424 if (u
->cgroup_path
) {
5425 r
= cg_attach_everywhere(u
->manager
->cgroup_supported
, u
->cgroup_path
, 0, NULL
, NULL
);
5427 log_unit_error_errno(u
, r
, "Failed to join unit cgroup %s: %m", u
->cgroup_path
);
5435 int unit_fork_and_watch_rm_rf(Unit
*u
, char **paths
, pid_t
*ret_pid
) {
5442 r
= unit_fork_helper_process(u
, "(sd-rmrf)", &pid
);
5446 int ret
= EXIT_SUCCESS
;
5449 STRV_FOREACH(i
, paths
) {
5450 r
= rm_rf(*i
, REMOVE_ROOT
|REMOVE_PHYSICAL
|REMOVE_MISSING_OK
);
5452 log_error_errno(r
, "Failed to remove '%s': %m", *i
);
5460 r
= unit_watch_pid(u
, pid
, true);
5468 static void unit_update_dependency_mask(Unit
*u
, UnitDependency d
, Unit
*other
, UnitDependencyInfo di
) {
5471 assert(d
< _UNIT_DEPENDENCY_MAX
);
5474 if (di
.origin_mask
== 0 && di
.destination_mask
== 0) {
5475 /* No bit set anymore, let's drop the whole entry */
5476 assert_se(hashmap_remove(u
->dependencies
[d
], other
));
5477 log_unit_debug(u
, "lost dependency %s=%s", unit_dependency_to_string(d
), other
->id
);
5479 /* Mask was reduced, let's update the entry */
5480 assert_se(hashmap_update(u
->dependencies
[d
], other
, di
.data
) == 0);
5483 void unit_remove_dependencies(Unit
*u
, UnitDependencyMask mask
) {
5488 /* Removes all dependencies u has on other units marked for ownership by 'mask'. */
5493 for (d
= 0; d
< _UNIT_DEPENDENCY_MAX
; d
++) {
5497 UnitDependencyInfo di
;
5503 HASHMAP_FOREACH_KEY(di
.data
, other
, u
->dependencies
[d
], i
) {
5506 if ((di
.origin_mask
& ~mask
) == di
.origin_mask
)
5508 di
.origin_mask
&= ~mask
;
5509 unit_update_dependency_mask(u
, d
, other
, di
);
5511 /* We updated the dependency from our unit to the other unit now. But most dependencies
5512 * imply a reverse dependency. Hence, let's delete that one too. For that we go through
5513 * all dependency types on the other unit and delete all those which point to us and
5514 * have the right mask set. */
5516 for (q
= 0; q
< _UNIT_DEPENDENCY_MAX
; q
++) {
5517 UnitDependencyInfo dj
;
5519 dj
.data
= hashmap_get(other
->dependencies
[q
], u
);
5520 if ((dj
.destination_mask
& ~mask
) == dj
.destination_mask
)
5522 dj
.destination_mask
&= ~mask
;
5524 unit_update_dependency_mask(other
, q
, u
, dj
);
5527 unit_add_to_gc_queue(other
);
5537 static int unit_get_invocation_path(Unit
*u
, char **ret
) {
5544 if (MANAGER_IS_SYSTEM(u
->manager
))
5545 p
= strjoin("/run/systemd/units/invocation:", u
->id
);
5547 _cleanup_free_
char *user_path
= NULL
;
5548 r
= xdg_user_runtime_dir(&user_path
, "/systemd/units/invocation:");
5551 p
= strjoin(user_path
, u
->id
);
5561 static int unit_export_invocation_id(Unit
*u
) {
5562 _cleanup_free_
char *p
= NULL
;
5567 if (u
->exported_invocation_id
)
5570 if (sd_id128_is_null(u
->invocation_id
))
5573 r
= unit_get_invocation_path(u
, &p
);
5575 return log_unit_debug_errno(u
, r
, "Failed to get invocation path: %m");
5577 r
= symlink_atomic(u
->invocation_id_string
, p
);
5579 return log_unit_debug_errno(u
, r
, "Failed to create invocation ID symlink %s: %m", p
);
5581 u
->exported_invocation_id
= true;
5585 static int unit_export_log_level_max(Unit
*u
, const ExecContext
*c
) {
5593 if (u
->exported_log_level_max
)
5596 if (c
->log_level_max
< 0)
5599 assert(c
->log_level_max
<= 7);
5601 buf
[0] = '0' + c
->log_level_max
;
5604 p
= strjoina("/run/systemd/units/log-level-max:", u
->id
);
5605 r
= symlink_atomic(buf
, p
);
5607 return log_unit_debug_errno(u
, r
, "Failed to create maximum log level symlink %s: %m", p
);
5609 u
->exported_log_level_max
= true;
5613 static int unit_export_log_extra_fields(Unit
*u
, const ExecContext
*c
) {
5614 _cleanup_close_
int fd
= -1;
5615 struct iovec
*iovec
;
5623 if (u
->exported_log_extra_fields
)
5626 if (c
->n_log_extra_fields
<= 0)
5629 sizes
= newa(le64_t
, c
->n_log_extra_fields
);
5630 iovec
= newa(struct iovec
, c
->n_log_extra_fields
* 2);
5632 for (i
= 0; i
< c
->n_log_extra_fields
; i
++) {
5633 sizes
[i
] = htole64(c
->log_extra_fields
[i
].iov_len
);
5635 iovec
[i
*2] = IOVEC_MAKE(sizes
+ i
, sizeof(le64_t
));
5636 iovec
[i
*2+1] = c
->log_extra_fields
[i
];
5639 p
= strjoina("/run/systemd/units/log-extra-fields:", u
->id
);
5640 pattern
= strjoina(p
, ".XXXXXX");
5642 fd
= mkostemp_safe(pattern
);
5644 return log_unit_debug_errno(u
, fd
, "Failed to create extra fields file %s: %m", p
);
5646 n
= writev(fd
, iovec
, c
->n_log_extra_fields
*2);
5648 r
= log_unit_debug_errno(u
, errno
, "Failed to write extra fields: %m");
5652 (void) fchmod(fd
, 0644);
5654 if (rename(pattern
, p
) < 0) {
5655 r
= log_unit_debug_errno(u
, errno
, "Failed to rename extra fields file: %m");
5659 u
->exported_log_extra_fields
= true;
5663 (void) unlink(pattern
);
5667 static int unit_export_log_ratelimit_interval(Unit
*u
, const ExecContext
*c
) {
5668 _cleanup_free_
char *buf
= NULL
;
5675 if (u
->exported_log_ratelimit_interval
)
5678 if (c
->log_ratelimit_interval_usec
== 0)
5681 p
= strjoina("/run/systemd/units/log-rate-limit-interval:", u
->id
);
5683 if (asprintf(&buf
, "%" PRIu64
, c
->log_ratelimit_interval_usec
) < 0)
5686 r
= symlink_atomic(buf
, p
);
5688 return log_unit_debug_errno(u
, r
, "Failed to create log rate limit interval symlink %s: %m", p
);
5690 u
->exported_log_ratelimit_interval
= true;
5694 static int unit_export_log_ratelimit_burst(Unit
*u
, const ExecContext
*c
) {
5695 _cleanup_free_
char *buf
= NULL
;
5702 if (u
->exported_log_ratelimit_burst
)
5705 if (c
->log_ratelimit_burst
== 0)
5708 p
= strjoina("/run/systemd/units/log-rate-limit-burst:", u
->id
);
5710 if (asprintf(&buf
, "%u", c
->log_ratelimit_burst
) < 0)
5713 r
= symlink_atomic(buf
, p
);
5715 return log_unit_debug_errno(u
, r
, "Failed to create log rate limit burst symlink %s: %m", p
);
5717 u
->exported_log_ratelimit_burst
= true;
5721 void unit_export_state_files(Unit
*u
) {
5722 const ExecContext
*c
;
5729 if (MANAGER_IS_TEST_RUN(u
->manager
))
5732 /* Exports a couple of unit properties to /run/systemd/units/, so that journald can quickly query this data
5733 * from there. Ideally, journald would use IPC to query this, like everybody else, but that's hard, as long as
5734 * the IPC system itself and PID 1 also log to the journal.
5736 * Note that these files really shouldn't be considered API for anyone else, as use a runtime file system as
5737 * IPC replacement is not compatible with today's world of file system namespaces. However, this doesn't really
5738 * apply to communication between the journal and systemd, as we assume that these two daemons live in the same
5739 * namespace at least.
5741 * Note that some of the "files" exported here are actually symlinks and not regular files. Symlinks work
5742 * better for storing small bits of data, in particular as we can write them with two system calls, and read
5745 (void) unit_export_invocation_id(u
);
5747 if (!MANAGER_IS_SYSTEM(u
->manager
))
5750 c
= unit_get_exec_context(u
);
5752 (void) unit_export_log_level_max(u
, c
);
5753 (void) unit_export_log_extra_fields(u
, c
);
5754 (void) unit_export_log_ratelimit_interval(u
, c
);
5755 (void) unit_export_log_ratelimit_burst(u
, c
);
5759 void unit_unlink_state_files(Unit
*u
) {
5767 /* Undoes the effect of unit_export_state() */
5769 if (u
->exported_invocation_id
) {
5770 _cleanup_free_
char *invocation_path
= NULL
;
5771 int r
= unit_get_invocation_path(u
, &invocation_path
);
5773 (void) unlink(invocation_path
);
5774 u
->exported_invocation_id
= false;
5778 if (!MANAGER_IS_SYSTEM(u
->manager
))
5781 if (u
->exported_log_level_max
) {
5782 p
= strjoina("/run/systemd/units/log-level-max:", u
->id
);
5785 u
->exported_log_level_max
= false;
5788 if (u
->exported_log_extra_fields
) {
5789 p
= strjoina("/run/systemd/units/extra-fields:", u
->id
);
5792 u
->exported_log_extra_fields
= false;
5795 if (u
->exported_log_ratelimit_interval
) {
5796 p
= strjoina("/run/systemd/units/log-rate-limit-interval:", u
->id
);
5799 u
->exported_log_ratelimit_interval
= false;
5802 if (u
->exported_log_ratelimit_burst
) {
5803 p
= strjoina("/run/systemd/units/log-rate-limit-burst:", u
->id
);
5806 u
->exported_log_ratelimit_burst
= false;
5810 int unit_prepare_exec(Unit
*u
) {
5815 /* Load any custom firewall BPF programs here once to test if they are existing and actually loadable.
5816 * Fail here early since later errors in the call chain unit_realize_cgroup to cgroup_context_apply are ignored. */
5817 r
= bpf_firewall_load_custom(u
);
5821 /* Prepares everything so that we can fork of a process for this unit */
5823 (void) unit_realize_cgroup(u
);
5825 if (u
->reset_accounting
) {
5826 (void) unit_reset_accounting(u
);
5827 u
->reset_accounting
= false;
5830 unit_export_state_files(u
);
5832 r
= unit_setup_exec_runtime(u
);
5836 r
= unit_setup_dynamic_creds(u
);
5843 static int log_leftover(pid_t pid
, int sig
, void *userdata
) {
5844 _cleanup_free_
char *comm
= NULL
;
5846 (void) get_process_comm(pid
, &comm
);
5848 if (comm
&& comm
[0] == '(') /* Most likely our own helper process (PAM?), ignore */
5851 log_unit_warning(userdata
,
5852 "Found left-over process " PID_FMT
" (%s) in control group while starting unit. Ignoring.\n"
5853 "This usually indicates unclean termination of a previous run, or service implementation deficiencies.",
5859 int unit_warn_leftover_processes(Unit
*u
) {
5862 (void) unit_pick_cgroup_path(u
);
5864 if (!u
->cgroup_path
)
5867 return cg_kill_recursive(SYSTEMD_CGROUP_CONTROLLER
, u
->cgroup_path
, 0, 0, NULL
, log_leftover
, u
);
5870 bool unit_needs_console(Unit
*u
) {
5872 UnitActiveState state
;
5876 state
= unit_active_state(u
);
5878 if (UNIT_IS_INACTIVE_OR_FAILED(state
))
5881 if (UNIT_VTABLE(u
)->needs_console
)
5882 return UNIT_VTABLE(u
)->needs_console(u
);
5884 /* If this unit type doesn't implement this call, let's use a generic fallback implementation: */
5885 ec
= unit_get_exec_context(u
);
5889 return exec_context_may_touch_console(ec
);
5892 const char *unit_label_path(const Unit
*u
) {
5897 /* Returns the file system path to use for MAC access decisions, i.e. the file to read the SELinux label off
5898 * when validating access checks. */
5900 p
= u
->source_path
?: u
->fragment_path
;
5904 /* If a unit is masked, then don't read the SELinux label of /dev/null, as that really makes no sense */
5905 if (path_equal(p
, "/dev/null"))
5911 int unit_pid_attachable(Unit
*u
, pid_t pid
, sd_bus_error
*error
) {
5916 /* Checks whether the specified PID is generally good for attaching, i.e. a valid PID, not our manager itself,
5917 * and not a kernel thread either */
5919 /* First, a simple range check */
5920 if (!pid_is_valid(pid
))
5921 return sd_bus_error_setf(error
, SD_BUS_ERROR_INVALID_ARGS
, "Process identifier " PID_FMT
" is not valid.", pid
);
5923 /* Some extra safety check */
5924 if (pid
== 1 || pid
== getpid_cached())
5925 return sd_bus_error_setf(error
, SD_BUS_ERROR_INVALID_ARGS
, "Process " PID_FMT
" is a manager process, refusing.", pid
);
5927 /* Don't even begin to bother with kernel threads */
5928 r
= is_kernel_thread(pid
);
5930 return sd_bus_error_setf(error
, SD_BUS_ERROR_UNIX_PROCESS_ID_UNKNOWN
, "Process with ID " PID_FMT
" does not exist.", pid
);
5932 return sd_bus_error_set_errnof(error
, r
, "Failed to determine whether process " PID_FMT
" is a kernel thread: %m", pid
);
5934 return sd_bus_error_setf(error
, SD_BUS_ERROR_INVALID_ARGS
, "Process " PID_FMT
" is a kernel thread, refusing.", pid
);
5939 void unit_log_success(Unit
*u
) {
5942 log_struct(LOG_INFO
,
5943 "MESSAGE_ID=" SD_MESSAGE_UNIT_SUCCESS_STR
,
5945 LOG_UNIT_INVOCATION_ID(u
),
5946 LOG_UNIT_MESSAGE(u
, "Succeeded."));
5949 void unit_log_failure(Unit
*u
, const char *result
) {
5953 log_struct(LOG_WARNING
,
5954 "MESSAGE_ID=" SD_MESSAGE_UNIT_FAILURE_RESULT_STR
,
5956 LOG_UNIT_INVOCATION_ID(u
),
5957 LOG_UNIT_MESSAGE(u
, "Failed with result '%s'.", result
),
5958 "UNIT_RESULT=%s", result
);
5961 void unit_log_skip(Unit
*u
, const char *result
) {
5965 log_struct(LOG_INFO
,
5966 "MESSAGE_ID=" SD_MESSAGE_UNIT_SKIPPED_STR
,
5968 LOG_UNIT_INVOCATION_ID(u
),
5969 LOG_UNIT_MESSAGE(u
, "Skipped due to '%s'.", result
),
5970 "UNIT_RESULT=%s", result
);
5973 void unit_log_process_exit(
5976 const char *command
,
5986 /* If this is a successful exit, let's log about the exit code on DEBUG level. If this is a failure
5987 * and the process exited on its own via exit(), then let's make this a NOTICE, under the assumption
5988 * that the service already logged the reason at a higher log level on its own. Otherwise, make it a
5992 else if (code
== CLD_EXITED
)
5995 level
= LOG_WARNING
;
5998 "MESSAGE_ID=" SD_MESSAGE_UNIT_PROCESS_EXIT_STR
,
5999 LOG_UNIT_MESSAGE(u
, "%s exited, code=%s, status=%i/%s",
6001 sigchld_code_to_string(code
), status
,
6002 strna(code
== CLD_EXITED
6003 ? exit_status_to_string(status
, EXIT_STATUS_FULL
)
6004 : signal_to_string(status
))),
6005 "EXIT_CODE=%s", sigchld_code_to_string(code
),
6006 "EXIT_STATUS=%i", status
,
6007 "COMMAND=%s", strna(command
),
6009 LOG_UNIT_INVOCATION_ID(u
));
6012 int unit_exit_status(Unit
*u
) {
6015 /* Returns the exit status to propagate for the most recent cycle of this unit. Returns a value in the range
6016 * 0…255 if there's something to propagate. EOPNOTSUPP if the concept does not apply to this unit type, ENODATA
6017 * if no data is currently known (for example because the unit hasn't deactivated yet) and EBADE if the main
6018 * service process has exited abnormally (signal/coredump). */
6020 if (!UNIT_VTABLE(u
)->exit_status
)
6023 return UNIT_VTABLE(u
)->exit_status(u
);
6026 int unit_failure_action_exit_status(Unit
*u
) {
6031 /* Returns the exit status to propagate on failure, or an error if there's nothing to propagate */
6033 if (u
->failure_action_exit_status
>= 0)
6034 return u
->failure_action_exit_status
;
6036 r
= unit_exit_status(u
);
6037 if (r
== -EBADE
) /* Exited, but not cleanly (i.e. by signal or such) */
6043 int unit_success_action_exit_status(Unit
*u
) {
6048 /* Returns the exit status to propagate on success, or an error if there's nothing to propagate */
6050 if (u
->success_action_exit_status
>= 0)
6051 return u
->success_action_exit_status
;
6053 r
= unit_exit_status(u
);
6054 if (r
== -EBADE
) /* Exited, but not cleanly (i.e. by signal or such) */
6060 int unit_test_trigger_loaded(Unit
*u
) {
6063 /* Tests whether the unit to trigger is loaded */
6065 trigger
= UNIT_TRIGGER(u
);
6067 return log_unit_error_errno(u
, SYNTHETIC_ERRNO(ENOENT
),
6068 "Refusing to start, no unit to trigger.");
6069 if (trigger
->load_state
!= UNIT_LOADED
)
6070 return log_unit_error_errno(u
, SYNTHETIC_ERRNO(ENOENT
),
6071 "Refusing to start, unit %s to trigger not loaded.", trigger
->id
);
6076 void unit_destroy_runtime_directory(Unit
*u
, const ExecContext
*context
) {
6077 if (context
->runtime_directory_preserve_mode
== EXEC_PRESERVE_NO
||
6078 (context
->runtime_directory_preserve_mode
== EXEC_PRESERVE_RESTART
&& !unit_will_restart(u
)))
6079 exec_context_destroy_runtime_directory(context
, u
->manager
->prefix
[EXEC_DIRECTORY_RUNTIME
]);
6082 int unit_clean(Unit
*u
, ExecCleanMask mask
) {
6083 UnitActiveState state
;
6087 /* Special return values:
6089 * -EOPNOTSUPP → cleaning not supported for this unit type
6090 * -EUNATCH → cleaning not defined for this resource type
6091 * -EBUSY → unit currently can't be cleaned since it's running or not properly loaded, or has
6092 * a job queued or similar
6095 if (!UNIT_VTABLE(u
)->clean
)
6101 if (u
->load_state
!= UNIT_LOADED
)
6107 state
= unit_active_state(u
);
6108 if (!IN_SET(state
, UNIT_INACTIVE
))
6111 return UNIT_VTABLE(u
)->clean(u
, mask
);
6114 int unit_can_clean(Unit
*u
, ExecCleanMask
*ret
) {
6117 if (!UNIT_VTABLE(u
)->clean
||
6118 u
->load_state
!= UNIT_LOADED
) {
6123 /* When the clean() method is set, can_clean() really should be set too */
6124 assert(UNIT_VTABLE(u
)->can_clean
);
6126 return UNIT_VTABLE(u
)->can_clean(u
, ret
);
6129 bool unit_can_freeze(Unit
*u
) {
6132 if (UNIT_VTABLE(u
)->can_freeze
)
6133 return UNIT_VTABLE(u
)->can_freeze(u
);
6135 return UNIT_VTABLE(u
)->freeze
;
6138 void unit_frozen(Unit
*u
) {
6141 u
->freezer_state
= FREEZER_FROZEN
;
6143 bus_unit_send_pending_freezer_message(u
);
6146 void unit_thawed(Unit
*u
) {
6149 u
->freezer_state
= FREEZER_RUNNING
;
6151 bus_unit_send_pending_freezer_message(u
);
6154 static int unit_freezer_action(Unit
*u
, FreezerAction action
) {
6156 int (*method
)(Unit
*);
6160 assert(IN_SET(action
, FREEZER_FREEZE
, FREEZER_THAW
));
6162 method
= action
== FREEZER_FREEZE
? UNIT_VTABLE(u
)->freeze
: UNIT_VTABLE(u
)->thaw
;
6163 if (!method
|| !cg_freezer_supported())
6169 if (u
->load_state
!= UNIT_LOADED
)
6172 s
= unit_active_state(u
);
6173 if (s
!= UNIT_ACTIVE
)
6176 if (IN_SET(u
->freezer_state
, FREEZER_FREEZING
, FREEZER_THAWING
))
6186 int unit_freeze(Unit
*u
) {
6187 return unit_freezer_action(u
, FREEZER_FREEZE
);
6190 int unit_thaw(Unit
*u
) {
6191 return unit_freezer_action(u
, FREEZER_THAW
);
6194 /* Wrappers around low-level cgroup freezer operations common for service and scope units */
6195 int unit_freeze_vtable_common(Unit
*u
) {
6196 return unit_cgroup_freezer_action(u
, FREEZER_FREEZE
);
6199 int unit_thaw_vtable_common(Unit
*u
) {
6200 return unit_cgroup_freezer_action(u
, FREEZER_THAW
);
6203 static const char* const collect_mode_table
[_COLLECT_MODE_MAX
] = {
6204 [COLLECT_INACTIVE
] = "inactive",
6205 [COLLECT_INACTIVE_OR_FAILED
] = "inactive-or-failed",
6208 DEFINE_STRING_TABLE_LOOKUP(collect_mode
, CollectMode
);