1 /* SPDX-License-Identifier: LGPL-2.1+ */
10 #include "cgroup-util.h"
13 #include "ip-address-access.h"
15 #include "ratelimit.h"
17 struct libmnt_monitor
;
18 typedef struct Unit Unit
;
20 /* Enforce upper limit how many names we allow */
21 #define MANAGER_MAX_NAMES 131072 /* 128K */
23 typedef struct Manager Manager
;
25 typedef enum ManagerState
{
33 _MANAGER_STATE_INVALID
= -1
36 typedef enum ManagerExitCode
{
46 _MANAGER_EXIT_CODE_MAX
,
47 _MANAGER_EXIT_CODE_INVALID
= -1
50 typedef enum StatusType
{
51 STATUS_TYPE_EPHEMERAL
,
53 STATUS_TYPE_EMERGENCY
,
56 typedef enum ManagerTimestamp
{
57 MANAGER_TIMESTAMP_FIRMWARE
,
58 MANAGER_TIMESTAMP_LOADER
,
59 MANAGER_TIMESTAMP_KERNEL
,
60 MANAGER_TIMESTAMP_INITRD
,
61 MANAGER_TIMESTAMP_USERSPACE
,
62 MANAGER_TIMESTAMP_FINISH
,
64 MANAGER_TIMESTAMP_SECURITY_START
,
65 MANAGER_TIMESTAMP_SECURITY_FINISH
,
66 MANAGER_TIMESTAMP_GENERATORS_START
,
67 MANAGER_TIMESTAMP_GENERATORS_FINISH
,
68 MANAGER_TIMESTAMP_UNITS_LOAD_START
,
69 MANAGER_TIMESTAMP_UNITS_LOAD_FINISH
,
70 _MANAGER_TIMESTAMP_MAX
,
71 _MANAGER_TIMESTAMP_INVALID
= -1,
76 #include "path-lookup.h"
77 #include "show-status.h"
78 #include "unit-name.h"
81 /* 0 = run normally */
82 MANAGER_TEST_RUN_MINIMAL
= 1 << 1, /* create basic data structures */
83 MANAGER_TEST_RUN_BASIC
= 1 << 2, /* interact with the environment */
84 MANAGER_TEST_RUN_ENV_GENERATORS
= 1 << 3, /* also run env generators */
85 MANAGER_TEST_RUN_GENERATORS
= 1 << 4, /* also run unit generators */
86 MANAGER_TEST_FULL
= MANAGER_TEST_RUN_BASIC
| MANAGER_TEST_RUN_ENV_GENERATORS
| MANAGER_TEST_RUN_GENERATORS
,
88 assert_cc((MANAGER_TEST_FULL
& UINT8_MAX
) == MANAGER_TEST_FULL
);
91 /* Note that the set of units we know of is allowed to be
92 * inconsistent. However the subset of it that is loaded may
93 * not, and the list of jobs may neither. */
95 /* Active jobs and units */
96 Hashmap
*units
; /* name string => Unit object n:1 */
97 Hashmap
*units_by_invocation_id
;
98 Hashmap
*jobs
; /* job id => Job object 1:1 */
100 /* To make it easy to iterate through the units of a specific
101 * type we maintain a per type linked list */
102 LIST_HEAD(Unit
, units_by_type
[_UNIT_TYPE_MAX
]);
104 /* Units that need to be loaded */
105 LIST_HEAD(Unit
, load_queue
); /* this is actually more a stack than a queue, but uh. */
107 /* Jobs that need to be run */
108 LIST_HEAD(Job
, run_queue
); /* more a stack than a queue, too */
110 /* Units and jobs that have not yet been announced via
111 * D-Bus. When something about a job changes it is added here
112 * if it is not in there yet. This allows easy coalescing of
113 * D-Bus change signals. */
114 LIST_HEAD(Unit
, dbus_unit_queue
);
115 LIST_HEAD(Job
, dbus_job_queue
);
117 /* Units to remove */
118 LIST_HEAD(Unit
, cleanup_queue
);
120 /* Units and jobs to check when doing GC */
121 LIST_HEAD(Unit
, gc_unit_queue
);
122 LIST_HEAD(Job
, gc_job_queue
);
124 /* Units that should be realized */
125 LIST_HEAD(Unit
, cgroup_realize_queue
);
127 /* Units whose cgroup ran empty */
128 LIST_HEAD(Unit
, cgroup_empty_queue
);
130 /* Target units whose default target dependencies haven't been set yet */
131 LIST_HEAD(Unit
, target_deps_queue
);
135 /* This maps PIDs we care about to units that are interested in. We allow multiple units to he interested in
136 * the same PID and multiple PIDs to be relevant to the same unit. Since in most cases only a single unit will
137 * be interested in the same PID we use a somewhat special encoding here: the first unit interested in a PID is
138 * stored directly in the hashmap, keyed by the PID unmodified. If there are other units interested too they'll
139 * be stored in a NULL-terminated array, and keyed by the negative PID. This is safe as pid_t is signed and
140 * negative PIDs are not used for regular processes but process groups, which we don't care about in this
141 * context, but this allows us to use the negative range for our own purposes. */
142 Hashmap
*watch_pids
; /* pid => unit as well as -pid => array of units */
144 /* A set contains all units which cgroup should be refreshed after startup */
147 /* A set which contains all currently failed units */
150 sd_event_source
*run_queue_event_source
;
154 sd_event_source
*notify_event_source
;
156 int cgroups_agent_fd
;
157 sd_event_source
*cgroups_agent_event_source
;
160 sd_event_source
*signal_event_source
;
162 sd_event_source
*sigchld_event_source
;
165 sd_event_source
*time_change_event_source
;
167 sd_event_source
*timezone_change_event_source
;
169 sd_event_source
*jobs_in_progress_event_source
;
171 int user_lookup_fds
[2];
172 sd_event_source
*user_lookup_event_source
;
174 sd_event_source
*sync_bus_names_event_source
;
176 UnitFileScope unit_file_scope
;
177 LookupPaths lookup_paths
;
178 Set
*unit_path_cache
;
182 usec_t runtime_watchdog
;
183 usec_t shutdown_watchdog
;
185 dual_timestamp timestamps
[_MANAGER_TIMESTAMP_MAX
];
189 /* Data specific to the device subsystem */
190 struct udev_monitor
* udev_monitor
;
191 sd_event_source
*udev_event_source
;
192 Hashmap
*devices_by_sysfs
;
194 /* Data specific to the mount subsystem */
195 struct libmnt_monitor
*mount_monitor
;
196 sd_event_source
*mount_event_source
;
198 /* Data specific to the swap filesystem */
200 sd_event_source
*swap_event_source
;
201 Hashmap
*swaps_by_devnode
;
203 /* Data specific to the D-Bus subsystem */
204 sd_bus
*api_bus
, *system_bus
;
206 int private_listen_fd
;
207 sd_event_source
*private_listen_event_source
;
209 /* Contains all the clients that are subscribed to signals via
210 the API bus. Note that private bus connections are always
211 considered subscribes, since they last for very short only,
212 and it is much simpler that way. */
213 sd_bus_track
*subscribed
;
214 char **deserialized_subscribed
;
216 /* This is used during reloading: before the reload we queue
217 * the reply message here, and afterwards we send it */
218 sd_bus_message
*queued_message
;
220 Hashmap
*watch_bus
; /* D-Bus names => Unit object n:1 */
222 bool send_reloading_done
;
224 uint32_t current_job_id
;
225 uint32_t default_unit_job_id
;
227 /* Data specific to the Automount subsystem */
230 /* Data specific to the cgroup subsystem */
231 Hashmap
*cgroup_unit
;
232 CGroupMask cgroup_supported
;
235 /* Notifications from cgroups, when the unified hierarchy is used is done via inotify. */
236 int cgroup_inotify_fd
;
237 sd_event_source
*cgroup_inotify_event_source
;
238 Hashmap
*cgroup_inotify_wd_unit
;
240 /* A defer event for handling cgroup empty events and processing them after SIGCHLD in all cases. */
241 sd_event_source
*cgroup_empty_event_source
;
243 /* Make sure the user cannot accidentally unmount our cgroup
249 /* The stat() data the last time we saw /etc/localtime */
250 usec_t etc_localtime_mtime
;
251 bool etc_localtime_accessible
:1;
254 ManagerExitCode exit_code
:5;
256 bool dispatching_load_queue
:1;
257 bool dispatching_dbus_queue
:1;
261 /* Have we already sent out the READY=1 notification? */
264 /* Have we already printed the taint line if necessary? */
267 /* Have we ever changed the "kernel.pid_max" sysctl? */
268 bool sysctl_pid_max_changed
:1;
270 unsigned test_run_flags
:8;
272 /* If non-zero, exit with the following value when the systemd
273 * process terminate. Useful for containers: systemd-nspawn could get
274 * the return value. */
275 uint8_t return_value
;
277 ShowStatus show_status
;
279 bool no_console_output
;
280 bool service_watchdogs
;
282 ExecOutput default_std_output
, default_std_error
;
284 usec_t default_restart_usec
, default_timeout_start_usec
, default_timeout_stop_usec
;
286 usec_t default_start_limit_interval
;
287 unsigned default_start_limit_burst
;
289 bool default_cpu_accounting
;
290 bool default_memory_accounting
;
291 bool default_io_accounting
;
292 bool default_blockio_accounting
;
293 bool default_tasks_accounting
;
294 bool default_ip_accounting
;
296 uint64_t default_tasks_max
;
297 usec_t default_timer_accuracy_usec
;
299 int original_log_level
;
300 LogTarget original_log_target
;
301 bool log_level_overridden
:1;
302 bool log_target_overridden
:1;
304 struct rlimit
*rlimit
[_RLIMIT_MAX
];
306 /* non-zero if we are reloading or reexecuting, */
308 /* A set which contains all jobs that started before reload and finished
310 Set
*pending_finished_jobs
;
312 unsigned n_installed_jobs
;
313 unsigned n_failed_jobs
;
315 /* Jobs in progress watching */
316 unsigned n_running_jobs
;
317 unsigned n_on_console
;
318 unsigned jobs_in_progress_iteration
;
320 /* Do we have any outstanding password prompts? */
321 int have_ask_password
;
322 int ask_password_inotify_fd
;
323 sd_event_source
*ask_password_event_source
;
325 /* Type=idle pipes */
327 sd_event_source
*idle_pipe_event_source
;
330 char *switch_root_init
;
332 /* This maps all possible path prefixes to the units needing
333 * them. It's a hashmap with a path string as key and a Set as
334 * value where Unit objects are contained. */
335 Hashmap
*units_requiring_mounts_for
;
337 /* Used for processing polkit authorization responses */
338 Hashmap
*polkit_registry
;
340 /* Dynamic users/groups, indexed by their name */
341 Hashmap
*dynamic_users
;
343 /* Keep track of all UIDs and GIDs any of our services currently use. This is useful for the RemoveIPC= logic. */
347 /* ExecRuntime, indexed by their owner unit id */
348 Hashmap
*exec_runtime_by_id
;
350 /* When the user hits C-A-D more than 7 times per 2s, do something immediately... */
351 RateLimit ctrl_alt_del_ratelimit
;
352 EmergencyAction cad_burst_action
;
354 const char *unit_log_field
;
355 const char *unit_log_format_string
;
357 const char *invocation_log_field
;
358 const char *invocation_log_format_string
;
360 int first_boot
; /* tri-state */
362 /* Prefixes of e.g. RuntimeDirectory= */
363 char *prefix
[_EXEC_DIRECTORY_TYPE_MAX
];
365 /* Used in the SIGCHLD and sd_notify() message invocation logic to avoid that we dispatch the same event
366 * multiple times on the same unit. */
371 #define MANAGER_IS_SYSTEM(m) ((m)->unit_file_scope == UNIT_FILE_SYSTEM)
372 #define MANAGER_IS_USER(m) ((m)->unit_file_scope != UNIT_FILE_SYSTEM)
374 #define MANAGER_IS_RELOADING(m) ((m)->n_reloading > 0)
376 #define MANAGER_IS_FINISHED(m) (dual_timestamp_is_set((m)->timestamps + MANAGER_TIMESTAMP_FINISH))
378 /* The exit code is set to OK as soon as we enter the main loop, and set otherwise as soon as we are done with it */
379 #define MANAGER_IS_RUNNING(m) ((m)->exit_code == MANAGER_OK)
381 int manager_new(UnitFileScope scope
, unsigned test_run_flags
, Manager
**m
);
382 Manager
* manager_free(Manager
*m
);
383 DEFINE_TRIVIAL_CLEANUP_FUNC(Manager
*, manager_free
);
385 int manager_startup(Manager
*m
, FILE *serialization
, FDSet
*fds
);
387 Job
*manager_get_job(Manager
*m
, uint32_t id
);
388 Unit
*manager_get_unit(Manager
*m
, const char *name
);
390 int manager_get_job_from_dbus_path(Manager
*m
, const char *s
, Job
**_j
);
392 int manager_load_unit_prepare(Manager
*m
, const char *name
, const char *path
, sd_bus_error
*e
, Unit
**_ret
);
393 int manager_load_unit(Manager
*m
, const char *name
, const char *path
, sd_bus_error
*e
, Unit
**_ret
);
394 int manager_load_startable_unit_or_warn(Manager
*m
, const char *name
, const char *path
, Unit
**ret
);
395 int manager_load_unit_from_dbus_path(Manager
*m
, const char *s
, sd_bus_error
*e
, Unit
**_u
);
397 int manager_add_job(Manager
*m
, JobType type
, Unit
*unit
, JobMode mode
, sd_bus_error
*e
, Job
**_ret
);
398 int manager_add_job_by_name(Manager
*m
, JobType type
, const char *name
, JobMode mode
, sd_bus_error
*e
, Job
**_ret
);
399 int manager_add_job_by_name_and_warn(Manager
*m
, JobType type
, const char *name
, JobMode mode
, Job
**ret
);
400 int manager_propagate_reload(Manager
*m
, Unit
*unit
, JobMode mode
, sd_bus_error
*e
);
402 void manager_dump_units(Manager
*s
, FILE *f
, const char *prefix
);
403 void manager_dump_jobs(Manager
*s
, FILE *f
, const char *prefix
);
404 void manager_dump(Manager
*s
, FILE *f
, const char *prefix
);
405 int manager_get_dump_string(Manager
*m
, char **ret
);
407 void manager_clear_jobs(Manager
*m
);
409 unsigned manager_dispatch_load_queue(Manager
*m
);
411 int manager_environment_add(Manager
*m
, char **minus
, char **plus
);
412 int manager_set_default_rlimits(Manager
*m
, struct rlimit
**default_rlimit
);
414 int manager_loop(Manager
*m
);
416 int manager_open_serialization(Manager
*m
, FILE **_f
);
418 int manager_serialize(Manager
*m
, FILE *f
, FDSet
*fds
, bool switching_root
);
419 int manager_deserialize(Manager
*m
, FILE *f
, FDSet
*fds
);
421 int manager_reload(Manager
*m
);
423 void manager_reset_failed(Manager
*m
);
425 void manager_send_unit_audit(Manager
*m
, Unit
*u
, int type
, bool success
);
426 void manager_send_unit_plymouth(Manager
*m
, Unit
*u
);
428 bool manager_unit_inactive_or_pending(Manager
*m
, const char *name
);
430 void manager_check_finished(Manager
*m
);
432 void manager_recheck_dbus(Manager
*m
);
433 void manager_recheck_journal(Manager
*m
);
435 void manager_set_show_status(Manager
*m
, ShowStatus mode
);
436 void manager_set_first_boot(Manager
*m
, bool b
);
438 void manager_status_printf(Manager
*m
, StatusType type
, const char *status
, const char *format
, ...) _printf_(4,5);
439 void manager_flip_auto_status(Manager
*m
, bool enable
);
441 Set
*manager_get_units_requiring_mounts_for(Manager
*m
, const char *path
);
443 ManagerState
manager_state(Manager
*m
);
445 int manager_update_failed_units(Manager
*m
, Unit
*u
, bool failed
);
447 void manager_unref_uid(Manager
*m
, uid_t uid
, bool destroy_now
);
448 int manager_ref_uid(Manager
*m
, uid_t uid
, bool clean_ipc
);
450 void manager_unref_gid(Manager
*m
, gid_t gid
, bool destroy_now
);
451 int manager_ref_gid(Manager
*m
, gid_t gid
, bool destroy_now
);
453 void manager_vacuum_uid_refs(Manager
*m
);
454 void manager_vacuum_gid_refs(Manager
*m
);
456 void manager_serialize_uid_refs(Manager
*m
, FILE *f
);
457 void manager_deserialize_uid_refs_one(Manager
*m
, const char *value
);
459 void manager_serialize_gid_refs(Manager
*m
, FILE *f
);
460 void manager_deserialize_gid_refs_one(Manager
*m
, const char *value
);
462 char *manager_taint_string(Manager
*m
);
464 void manager_ref_console(Manager
*m
);
465 void manager_unref_console(Manager
*m
);
467 void manager_override_log_level(Manager
*m
, int level
);
468 void manager_restore_original_log_level(Manager
*m
);
470 void manager_override_log_target(Manager
*m
, LogTarget target
);
471 void manager_restore_original_log_target(Manager
*m
);
473 const char *manager_state_to_string(ManagerState m
) _const_
;
474 ManagerState
manager_state_from_string(const char *s
) _pure_
;
476 const char *manager_get_confirm_spawn(Manager
*m
);
477 bool manager_is_confirm_spawn_disabled(Manager
*m
);
478 void manager_disable_confirm_spawn(void);
480 const char *manager_timestamp_to_string(ManagerTimestamp m
) _const_
;
481 ManagerTimestamp
manager_timestamp_from_string(const char *s
) _pure_
;