1 /* SPDX-License-Identifier: LGPL-2.1+ */
11 #include "cgroup-util.h"
14 #include "ip-address-access.h"
16 #include "ratelimit.h"
18 struct libmnt_monitor
;
19 typedef struct Unit Unit
;
21 /* Enforce upper limit how many names we allow */
22 #define MANAGER_MAX_NAMES 131072 /* 128K */
24 typedef struct Manager Manager
;
26 /* An externally visible state. We don't actually maintain this as state variable, but derive it from various fields
28 typedef enum ManagerState
{
36 _MANAGER_STATE_INVALID
= -1
39 typedef enum ManagerObjective
{
49 _MANAGER_OBJECTIVE_MAX
,
50 _MANAGER_OBJECTIVE_INVALID
= -1
53 typedef enum StatusType
{
54 STATUS_TYPE_EPHEMERAL
,
56 STATUS_TYPE_EMERGENCY
,
60 * 1. TIMESTAMP_FIRMWARE, TIMESTAMP_LOADER, TIMESTAMP_KERNEL, TIMESTAMP_INITRD,
61 * TIMESTAMP_SECURITY_START, and TIMESTAMP_SECURITY_FINISH are set only when
62 * the manager is system and not running under container environment.
64 * 2. The monotonic timestamp of TIMESTAMP_KERNEL is always zero.
66 * 3. The realtime timestamp of TIMESTAMP_KERNEL will be unset if the system does not
69 * 4. TIMESTAMP_FIRMWARE and TIMESTAMP_LOADER will be unset if the system does not
70 * have RTC, or systemd is built without EFI support.
72 * 5. The monotonic timestamps of TIMESTAMP_FIRMWARE and TIMESTAMP_LOADER are stored as
73 * negative of the actual value.
75 * 6. TIMESTAMP_USERSPACE is the timestamp of when the manager was started.
77 * 7. TIMESTAMP_INITRD_* are set only when the system is booted with an initrd.
80 typedef enum ManagerTimestamp
{
81 MANAGER_TIMESTAMP_FIRMWARE
,
82 MANAGER_TIMESTAMP_LOADER
,
83 MANAGER_TIMESTAMP_KERNEL
,
84 MANAGER_TIMESTAMP_INITRD
,
85 MANAGER_TIMESTAMP_USERSPACE
,
86 MANAGER_TIMESTAMP_FINISH
,
88 MANAGER_TIMESTAMP_SECURITY_START
,
89 MANAGER_TIMESTAMP_SECURITY_FINISH
,
90 MANAGER_TIMESTAMP_GENERATORS_START
,
91 MANAGER_TIMESTAMP_GENERATORS_FINISH
,
92 MANAGER_TIMESTAMP_UNITS_LOAD_START
,
93 MANAGER_TIMESTAMP_UNITS_LOAD_FINISH
,
95 MANAGER_TIMESTAMP_INITRD_SECURITY_START
,
96 MANAGER_TIMESTAMP_INITRD_SECURITY_FINISH
,
97 MANAGER_TIMESTAMP_INITRD_GENERATORS_START
,
98 MANAGER_TIMESTAMP_INITRD_GENERATORS_FINISH
,
99 MANAGER_TIMESTAMP_INITRD_UNITS_LOAD_START
,
100 MANAGER_TIMESTAMP_INITRD_UNITS_LOAD_FINISH
,
101 _MANAGER_TIMESTAMP_MAX
,
102 _MANAGER_TIMESTAMP_INVALID
= -1,
107 #include "path-lookup.h"
108 #include "show-status.h"
109 #include "unit-name.h"
111 typedef enum ManagerTestRunFlags
{
112 MANAGER_TEST_NORMAL
= 0, /* run normally */
113 MANAGER_TEST_RUN_MINIMAL
= 1 << 0, /* create basic data structures */
114 MANAGER_TEST_RUN_BASIC
= 1 << 1, /* interact with the environment */
115 MANAGER_TEST_RUN_ENV_GENERATORS
= 1 << 2, /* also run env generators */
116 MANAGER_TEST_RUN_GENERATORS
= 1 << 3, /* also run unit generators */
117 MANAGER_TEST_FULL
= MANAGER_TEST_RUN_BASIC
| MANAGER_TEST_RUN_ENV_GENERATORS
| MANAGER_TEST_RUN_GENERATORS
,
118 } ManagerTestRunFlags
;
120 assert_cc((MANAGER_TEST_FULL
& UINT8_MAX
) == MANAGER_TEST_FULL
);
123 /* Note that the set of units we know of is allowed to be
124 * inconsistent. However the subset of it that is loaded may
125 * not, and the list of jobs may neither. */
127 /* Active jobs and units */
128 Hashmap
*units
; /* name string => Unit object n:1 */
129 Hashmap
*units_by_invocation_id
;
130 Hashmap
*jobs
; /* job id => Job object 1:1 */
132 /* To make it easy to iterate through the units of a specific
133 * type we maintain a per type linked list */
134 LIST_HEAD(Unit
, units_by_type
[_UNIT_TYPE_MAX
]);
136 /* Units that need to be loaded */
137 LIST_HEAD(Unit
, load_queue
); /* this is actually more a stack than a queue, but uh. */
139 /* Jobs that need to be run */
140 LIST_HEAD(Job
, run_queue
); /* more a stack than a queue, too */
142 /* Units and jobs that have not yet been announced via
143 * D-Bus. When something about a job changes it is added here
144 * if it is not in there yet. This allows easy coalescing of
145 * D-Bus change signals. */
146 LIST_HEAD(Unit
, dbus_unit_queue
);
147 LIST_HEAD(Job
, dbus_job_queue
);
149 /* Units to remove */
150 LIST_HEAD(Unit
, cleanup_queue
);
152 /* Units and jobs to check when doing GC */
153 LIST_HEAD(Unit
, gc_unit_queue
);
154 LIST_HEAD(Job
, gc_job_queue
);
156 /* Units that should be realized */
157 LIST_HEAD(Unit
, cgroup_realize_queue
);
159 /* Units whose cgroup ran empty */
160 LIST_HEAD(Unit
, cgroup_empty_queue
);
162 /* Target units whose default target dependencies haven't been set yet */
163 LIST_HEAD(Unit
, target_deps_queue
);
165 /* Units that might be subject to StopWhenUnneeded= clean-up */
166 LIST_HEAD(Unit
, stop_when_unneeded_queue
);
170 /* This maps PIDs we care about to units that are interested in. We allow multiple units to he interested in
171 * the same PID and multiple PIDs to be relevant to the same unit. Since in most cases only a single unit will
172 * be interested in the same PID we use a somewhat special encoding here: the first unit interested in a PID is
173 * stored directly in the hashmap, keyed by the PID unmodified. If there are other units interested too they'll
174 * be stored in a NULL-terminated array, and keyed by the negative PID. This is safe as pid_t is signed and
175 * negative PIDs are not used for regular processes but process groups, which we don't care about in this
176 * context, but this allows us to use the negative range for our own purposes. */
177 Hashmap
*watch_pids
; /* pid => unit as well as -pid => array of units */
179 /* A set contains all units which cgroup should be refreshed after startup */
182 /* A set which contains all currently failed units */
185 sd_event_source
*run_queue_event_source
;
189 sd_event_source
*notify_event_source
;
191 int cgroups_agent_fd
;
192 sd_event_source
*cgroups_agent_event_source
;
195 sd_event_source
*signal_event_source
;
197 sd_event_source
*sigchld_event_source
;
200 sd_event_source
*time_change_event_source
;
202 sd_event_source
*timezone_change_event_source
;
204 sd_event_source
*jobs_in_progress_event_source
;
206 int user_lookup_fds
[2];
207 sd_event_source
*user_lookup_event_source
;
209 sd_event_source
*sync_bus_names_event_source
;
211 UnitFileScope unit_file_scope
;
212 LookupPaths lookup_paths
;
213 Set
*unit_path_cache
;
215 char **transient_environment
; /* The environment, as determined from config files, kernel cmdline and environment generators */
216 char **client_environment
; /* Environment variables created by clients through the bus API */
218 usec_t runtime_watchdog
;
219 usec_t shutdown_watchdog
;
221 dual_timestamp timestamps
[_MANAGER_TIMESTAMP_MAX
];
223 /* Data specific to the device subsystem */
224 sd_device_monitor
*device_monitor
;
225 Hashmap
*devices_by_sysfs
;
227 /* Data specific to the mount subsystem */
228 struct libmnt_monitor
*mount_monitor
;
229 sd_event_source
*mount_event_source
;
231 /* Data specific to the swap filesystem */
233 sd_event_source
*swap_event_source
;
234 Hashmap
*swaps_by_devnode
;
236 /* Data specific to the D-Bus subsystem */
237 sd_bus
*api_bus
, *system_bus
;
239 int private_listen_fd
;
240 sd_event_source
*private_listen_event_source
;
242 /* Contains all the clients that are subscribed to signals via
243 the API bus. Note that private bus connections are always
244 considered subscribes, since they last for very short only,
245 and it is much simpler that way. */
246 sd_bus_track
*subscribed
;
247 char **deserialized_subscribed
;
249 /* This is used during reloading: before the reload we queue
250 * the reply message here, and afterwards we send it */
251 sd_bus_message
*pending_reload_message
;
253 Hashmap
*watch_bus
; /* D-Bus names => Unit object n:1 */
255 bool send_reloading_done
;
257 uint32_t current_job_id
;
258 uint32_t default_unit_job_id
;
260 /* Data specific to the Automount subsystem */
263 /* Data specific to the cgroup subsystem */
264 Hashmap
*cgroup_unit
;
265 CGroupMask cgroup_supported
;
268 /* Notifications from cgroups, when the unified hierarchy is used is done via inotify. */
269 int cgroup_inotify_fd
;
270 sd_event_source
*cgroup_inotify_event_source
;
271 Hashmap
*cgroup_inotify_wd_unit
;
273 /* A defer event for handling cgroup empty events and processing them after SIGCHLD in all cases. */
274 sd_event_source
*cgroup_empty_event_source
;
276 /* Make sure the user cannot accidentally unmount our cgroup
282 /* The stat() data the last time we saw /etc/localtime */
283 usec_t etc_localtime_mtime
;
284 bool etc_localtime_accessible
:1;
286 ManagerObjective objective
:5;
289 bool dispatching_load_queue
:1;
293 /* Have we already sent out the READY=1 notification? */
296 /* Have we already printed the taint line if necessary? */
299 /* Have we ever changed the "kernel.pid_max" sysctl? */
300 bool sysctl_pid_max_changed
:1;
302 ManagerTestRunFlags test_run_flags
:8;
304 /* If non-zero, exit with the following value when the systemd
305 * process terminate. Useful for containers: systemd-nspawn could get
306 * the return value. */
307 uint8_t return_value
;
309 ShowStatus show_status
;
311 bool no_console_output
;
312 bool service_watchdogs
;
314 ExecOutput default_std_output
, default_std_error
;
316 usec_t default_restart_usec
, default_timeout_start_usec
, default_timeout_stop_usec
;
318 usec_t default_start_limit_interval
;
319 unsigned default_start_limit_burst
;
321 bool default_cpu_accounting
;
322 bool default_memory_accounting
;
323 bool default_io_accounting
;
324 bool default_blockio_accounting
;
325 bool default_tasks_accounting
;
326 bool default_ip_accounting
;
328 uint64_t default_tasks_max
;
329 usec_t default_timer_accuracy_usec
;
331 int original_log_level
;
332 LogTarget original_log_target
;
333 bool log_level_overridden
:1;
334 bool log_target_overridden
:1;
336 struct rlimit
*rlimit
[_RLIMIT_MAX
];
338 /* non-zero if we are reloading or reexecuting, */
341 unsigned n_installed_jobs
;
342 unsigned n_failed_jobs
;
344 /* Jobs in progress watching */
345 unsigned n_running_jobs
;
346 unsigned n_on_console
;
347 unsigned jobs_in_progress_iteration
;
349 /* Do we have any outstanding password prompts? */
350 int have_ask_password
;
351 int ask_password_inotify_fd
;
352 sd_event_source
*ask_password_event_source
;
354 /* Type=idle pipes */
356 sd_event_source
*idle_pipe_event_source
;
359 char *switch_root_init
;
361 /* This maps all possible path prefixes to the units needing
362 * them. It's a hashmap with a path string as key and a Set as
363 * value where Unit objects are contained. */
364 Hashmap
*units_requiring_mounts_for
;
366 /* Used for processing polkit authorization responses */
367 Hashmap
*polkit_registry
;
369 /* Dynamic users/groups, indexed by their name */
370 Hashmap
*dynamic_users
;
372 /* Keep track of all UIDs and GIDs any of our services currently use. This is useful for the RemoveIPC= logic. */
376 /* ExecRuntime, indexed by their owner unit id */
377 Hashmap
*exec_runtime_by_id
;
379 /* When the user hits C-A-D more than 7 times per 2s, do something immediately... */
380 RateLimit ctrl_alt_del_ratelimit
;
381 EmergencyAction cad_burst_action
;
383 const char *unit_log_field
;
384 const char *unit_log_format_string
;
386 const char *invocation_log_field
;
387 const char *invocation_log_format_string
;
389 int first_boot
; /* tri-state */
391 /* Prefixes of e.g. RuntimeDirectory= */
392 char *prefix
[_EXEC_DIRECTORY_TYPE_MAX
];
394 /* Used in the SIGCHLD and sd_notify() message invocation logic to avoid that we dispatch the same event
395 * multiple times on the same unit. */
400 #define MANAGER_IS_SYSTEM(m) ((m)->unit_file_scope == UNIT_FILE_SYSTEM)
401 #define MANAGER_IS_USER(m) ((m)->unit_file_scope != UNIT_FILE_SYSTEM)
403 #define MANAGER_IS_RELOADING(m) ((m)->n_reloading > 0)
405 #define MANAGER_IS_FINISHED(m) (dual_timestamp_is_set((m)->timestamps + MANAGER_TIMESTAMP_FINISH))
407 /* The objective is set to OK as soon as we enter the main loop, and set otherwise as soon as we are done with it */
408 #define MANAGER_IS_RUNNING(m) ((m)->objective == MANAGER_OK)
410 #define MANAGER_IS_TEST_RUN(m) ((m)->test_run_flags != 0)
412 int manager_new(UnitFileScope scope
, ManagerTestRunFlags test_run_flags
, Manager
**m
);
413 Manager
* manager_free(Manager
*m
);
414 DEFINE_TRIVIAL_CLEANUP_FUNC(Manager
*, manager_free
);
416 int manager_startup(Manager
*m
, FILE *serialization
, FDSet
*fds
);
418 Job
*manager_get_job(Manager
*m
, uint32_t id
);
419 Unit
*manager_get_unit(Manager
*m
, const char *name
);
421 int manager_get_job_from_dbus_path(Manager
*m
, const char *s
, Job
**_j
);
423 int manager_load_unit_prepare(Manager
*m
, const char *name
, const char *path
, sd_bus_error
*e
, Unit
**_ret
);
424 int manager_load_unit(Manager
*m
, const char *name
, const char *path
, sd_bus_error
*e
, Unit
**_ret
);
425 int manager_load_startable_unit_or_warn(Manager
*m
, const char *name
, const char *path
, Unit
**ret
);
426 int manager_load_unit_from_dbus_path(Manager
*m
, const char *s
, sd_bus_error
*e
, Unit
**_u
);
428 int manager_add_job(Manager
*m
, JobType type
, Unit
*unit
, JobMode mode
, sd_bus_error
*e
, Job
**_ret
);
429 int manager_add_job_by_name(Manager
*m
, JobType type
, const char *name
, JobMode mode
, sd_bus_error
*e
, Job
**_ret
);
430 int manager_add_job_by_name_and_warn(Manager
*m
, JobType type
, const char *name
, JobMode mode
, Job
**ret
);
431 int manager_propagate_reload(Manager
*m
, Unit
*unit
, JobMode mode
, sd_bus_error
*e
);
433 void manager_dump_units(Manager
*s
, FILE *f
, const char *prefix
);
434 void manager_dump_jobs(Manager
*s
, FILE *f
, const char *prefix
);
435 void manager_dump(Manager
*s
, FILE *f
, const char *prefix
);
436 int manager_get_dump_string(Manager
*m
, char **ret
);
438 void manager_clear_jobs(Manager
*m
);
440 unsigned manager_dispatch_load_queue(Manager
*m
);
442 int manager_default_environment(Manager
*m
);
443 int manager_transient_environment_add(Manager
*m
, char **plus
);
444 int manager_client_environment_modify(Manager
*m
, char **minus
, char **plus
);
445 int manager_get_effective_environment(Manager
*m
, char ***ret
);
447 int manager_set_default_rlimits(Manager
*m
, struct rlimit
**default_rlimit
);
449 int manager_loop(Manager
*m
);
451 int manager_open_serialization(Manager
*m
, FILE **_f
);
453 int manager_serialize(Manager
*m
, FILE *f
, FDSet
*fds
, bool switching_root
);
454 int manager_deserialize(Manager
*m
, FILE *f
, FDSet
*fds
);
456 int manager_reload(Manager
*m
);
458 void manager_reset_failed(Manager
*m
);
460 void manager_send_unit_audit(Manager
*m
, Unit
*u
, int type
, bool success
);
461 void manager_send_unit_plymouth(Manager
*m
, Unit
*u
);
463 bool manager_unit_inactive_or_pending(Manager
*m
, const char *name
);
465 void manager_check_finished(Manager
*m
);
467 void manager_recheck_dbus(Manager
*m
);
468 void manager_recheck_journal(Manager
*m
);
470 void manager_set_show_status(Manager
*m
, ShowStatus mode
);
471 void manager_set_first_boot(Manager
*m
, bool b
);
473 void manager_status_printf(Manager
*m
, StatusType type
, const char *status
, const char *format
, ...) _printf_(4,5);
474 void manager_flip_auto_status(Manager
*m
, bool enable
);
476 Set
*manager_get_units_requiring_mounts_for(Manager
*m
, const char *path
);
478 ManagerState
manager_state(Manager
*m
);
480 int manager_update_failed_units(Manager
*m
, Unit
*u
, bool failed
);
482 void manager_unref_uid(Manager
*m
, uid_t uid
, bool destroy_now
);
483 int manager_ref_uid(Manager
*m
, uid_t uid
, bool clean_ipc
);
485 void manager_unref_gid(Manager
*m
, gid_t gid
, bool destroy_now
);
486 int manager_ref_gid(Manager
*m
, gid_t gid
, bool destroy_now
);
488 void manager_vacuum_uid_refs(Manager
*m
);
489 void manager_vacuum_gid_refs(Manager
*m
);
491 void manager_serialize_uid_refs(Manager
*m
, FILE *f
);
492 void manager_deserialize_uid_refs_one(Manager
*m
, const char *value
);
494 void manager_serialize_gid_refs(Manager
*m
, FILE *f
);
495 void manager_deserialize_gid_refs_one(Manager
*m
, const char *value
);
497 char *manager_taint_string(Manager
*m
);
499 void manager_ref_console(Manager
*m
);
500 void manager_unref_console(Manager
*m
);
502 void manager_override_log_level(Manager
*m
, int level
);
503 void manager_restore_original_log_level(Manager
*m
);
505 void manager_override_log_target(Manager
*m
, LogTarget target
);
506 void manager_restore_original_log_target(Manager
*m
);
508 const char *manager_state_to_string(ManagerState m
) _const_
;
509 ManagerState
manager_state_from_string(const char *s
) _pure_
;
511 const char *manager_get_confirm_spawn(Manager
*m
);
512 bool manager_is_confirm_spawn_disabled(Manager
*m
);
513 void manager_disable_confirm_spawn(void);
515 const char *manager_timestamp_to_string(ManagerTimestamp m
) _const_
;
516 ManagerTimestamp
manager_timestamp_from_string(const char *s
) _pure_
;
517 ManagerTimestamp
manager_timestamp_initrd_mangle(ManagerTimestamp s
);