4 This file is part of systemd.
6 Copyright 2010 Lennart Poettering
8 systemd is free software; you can redistribute it and/or modify it
9 under the terms of the GNU Lesser General Public License as published by
10 the Free Software Foundation; either version 2.1 of the License, or
11 (at your option) any later version.
13 systemd is distributed in the hope that it will be useful, but
14 WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16 Lesser General Public License for more details.
18 You should have received a copy of the GNU Lesser General Public License
19 along with systemd; If not, see <http://www.gnu.org/licenses/>.
29 #include "cgroup-util.h"
33 #include "ratelimit.h"
35 /* Enforce upper limit how many names we allow */
36 #define MANAGER_MAX_NAMES 131072 /* 128K */
38 typedef struct Manager Manager
;
40 typedef enum ManagerState
{
48 _MANAGER_STATE_INVALID
= -1
51 typedef enum ManagerExitCode
{
61 _MANAGER_EXIT_CODE_MAX
,
62 _MANAGER_EXIT_CODE_INVALID
= -1
65 typedef enum StatusType
{
66 STATUS_TYPE_EPHEMERAL
,
68 STATUS_TYPE_EMERGENCY
,
73 #include "path-lookup.h"
74 #include "show-status.h"
75 #include "unit-name.h"
78 /* 0 = run normally */
79 MANAGER_TEST_RUN_MINIMAL
= 1, /* run test w/o generators */
80 MANAGER_TEST_RUN_ENV_GENERATORS
= 2, /* also run env generators */
81 MANAGER_TEST_RUN_GENERATORS
= 4, /* also run unit generators */
82 MANAGER_TEST_FULL
= MANAGER_TEST_RUN_ENV_GENERATORS
| MANAGER_TEST_RUN_GENERATORS
,
84 assert_cc((MANAGER_TEST_FULL
& UINT8_MAX
) == MANAGER_TEST_FULL
);
87 /* Note that the set of units we know of is allowed to be
88 * inconsistent. However the subset of it that is loaded may
89 * not, and the list of jobs may neither. */
91 /* Active jobs and units */
92 Hashmap
*units
; /* name string => Unit object n:1 */
93 Hashmap
*units_by_invocation_id
;
94 Hashmap
*jobs
; /* job id => Job object 1:1 */
96 /* To make it easy to iterate through the units of a specific
97 * type we maintain a per type linked list */
98 LIST_HEAD(Unit
, units_by_type
[_UNIT_TYPE_MAX
]);
100 /* Units that need to be loaded */
101 LIST_HEAD(Unit
, load_queue
); /* this is actually more a stack than a queue, but uh. */
103 /* Jobs that need to be run */
104 LIST_HEAD(Job
, run_queue
); /* more a stack than a queue, too */
106 /* Units and jobs that have not yet been announced via
107 * D-Bus. When something about a job changes it is added here
108 * if it is not in there yet. This allows easy coalescing of
109 * D-Bus change signals. */
110 LIST_HEAD(Unit
, dbus_unit_queue
);
111 LIST_HEAD(Job
, dbus_job_queue
);
113 /* Units to remove */
114 LIST_HEAD(Unit
, cleanup_queue
);
116 /* Units and jobs to check when doing GC */
117 LIST_HEAD(Unit
, gc_unit_queue
);
118 LIST_HEAD(Job
, gc_job_queue
);
120 /* Units that should be realized */
121 LIST_HEAD(Unit
, cgroup_queue
);
125 /* We use two hash tables here, since the same PID might be
126 * watched by two different units: once the unit that forked
127 * it off, and possibly a different unit to which it was
128 * joined as cgroup member. Since we know that it is either
129 * one or two units for each PID we just use to hashmaps
131 Hashmap
*watch_pids1
; /* pid => Unit object n:1 */
132 Hashmap
*watch_pids2
; /* pid => Unit object n:1 */
134 /* A set contains all units which cgroup should be refreshed after startup */
137 /* A set which contains all currently failed units */
140 sd_event_source
*run_queue_event_source
;
144 sd_event_source
*notify_event_source
;
146 int cgroups_agent_fd
;
147 sd_event_source
*cgroups_agent_event_source
;
150 sd_event_source
*signal_event_source
;
153 sd_event_source
*time_change_event_source
;
155 sd_event_source
*jobs_in_progress_event_source
;
157 int user_lookup_fds
[2];
158 sd_event_source
*user_lookup_event_source
;
160 UnitFileScope unit_file_scope
;
161 LookupPaths lookup_paths
;
162 Set
*unit_path_cache
;
166 usec_t runtime_watchdog
;
167 usec_t shutdown_watchdog
;
169 dual_timestamp firmware_timestamp
;
170 dual_timestamp loader_timestamp
;
171 dual_timestamp kernel_timestamp
;
172 dual_timestamp initrd_timestamp
;
173 dual_timestamp userspace_timestamp
;
174 dual_timestamp finish_timestamp
;
176 dual_timestamp security_start_timestamp
;
177 dual_timestamp security_finish_timestamp
;
178 dual_timestamp generators_start_timestamp
;
179 dual_timestamp generators_finish_timestamp
;
180 dual_timestamp units_load_start_timestamp
;
181 dual_timestamp units_load_finish_timestamp
;
185 /* Data specific to the device subsystem */
186 struct udev_monitor
* udev_monitor
;
187 sd_event_source
*udev_event_source
;
188 Hashmap
*devices_by_sysfs
;
190 /* Data specific to the mount subsystem */
191 struct libmnt_monitor
*mount_monitor
;
192 sd_event_source
*mount_event_source
;
194 /* Data specific to the swap filesystem */
196 sd_event_source
*swap_event_source
;
197 Hashmap
*swaps_by_devnode
;
199 /* Data specific to the D-Bus subsystem */
200 sd_bus
*api_bus
, *system_bus
;
202 int private_listen_fd
;
203 sd_event_source
*private_listen_event_source
;
205 /* Contains all the clients that are subscribed to signals via
206 the API bus. Note that private bus connections are always
207 considered subscribes, since they last for very short only,
208 and it is much simpler that way. */
209 sd_bus_track
*subscribed
;
210 char **deserialized_subscribed
;
212 /* This is used during reloading: before the reload we queue
213 * the reply message here, and afterwards we send it */
214 sd_bus_message
*queued_message
;
216 Hashmap
*watch_bus
; /* D-Bus names => Unit object n:1 */
218 bool send_reloading_done
;
220 uint32_t current_job_id
;
221 uint32_t default_unit_job_id
;
223 /* Data specific to the Automount subsystem */
226 /* Data specific to the cgroup subsystem */
227 Hashmap
*cgroup_unit
;
228 CGroupMask cgroup_supported
;
231 /* Notifications from cgroups, when the unified hierarchy is
232 * used is done via inotify. */
233 int cgroup_inotify_fd
;
234 sd_event_source
*cgroup_inotify_event_source
;
235 Hashmap
*cgroup_inotify_wd_unit
;
237 /* Make sure the user cannot accidentally unmount our cgroup
244 ManagerExitCode exit_code
:5;
246 bool dispatching_load_queue
:1;
247 bool dispatching_dbus_queue
:1;
251 unsigned test_run_flags
:8;
253 /* If non-zero, exit with the following value when the systemd
254 * process terminate. Useful for containers: systemd-nspawn could get
255 * the return value. */
256 uint8_t return_value
;
258 ShowStatus show_status
;
260 bool no_console_output
;
262 ExecOutput default_std_output
, default_std_error
;
264 usec_t default_restart_usec
, default_timeout_start_usec
, default_timeout_stop_usec
;
266 usec_t default_start_limit_interval
;
267 unsigned default_start_limit_burst
;
269 bool default_cpu_accounting
;
270 bool default_memory_accounting
;
271 bool default_io_accounting
;
272 bool default_blockio_accounting
;
273 bool default_tasks_accounting
;
275 uint64_t default_tasks_max
;
276 usec_t default_timer_accuracy_usec
;
278 struct rlimit
*rlimit
[_RLIMIT_MAX
];
280 /* non-zero if we are reloading or reexecuting, */
283 unsigned n_installed_jobs
;
284 unsigned n_failed_jobs
;
286 /* Jobs in progress watching */
287 unsigned n_running_jobs
;
288 unsigned n_on_console
;
289 unsigned jobs_in_progress_iteration
;
291 /* Do we have any outstanding password prompts? */
292 int have_ask_password
;
293 int ask_password_inotify_fd
;
294 sd_event_source
*ask_password_event_source
;
296 /* Type=idle pipes */
298 sd_event_source
*idle_pipe_event_source
;
301 char *switch_root_init
;
303 /* This maps all possible path prefixes to the units needing
304 * them. It's a hashmap with a path string as key and a Set as
305 * value where Unit objects are contained. */
306 Hashmap
*units_requiring_mounts_for
;
308 /* Used for processing polkit authorization responses */
309 Hashmap
*polkit_registry
;
311 /* Dynamic users/groups, indexed by their name */
312 Hashmap
*dynamic_users
;
314 /* Keep track of all UIDs and GIDs any of our services currently use. This is useful for the RemoveIPC= logic. */
318 /* When the user hits C-A-D more than 7 times per 2s, do something immediately... */
319 RateLimit ctrl_alt_del_ratelimit
;
320 EmergencyAction cad_burst_action
;
322 const char *unit_log_field
;
323 const char *unit_log_format_string
;
325 const char *invocation_log_field
;
326 const char *invocation_log_format_string
;
328 int first_boot
; /* tri-state */
330 /* prefixes of e.g. RuntimeDirectory= */
331 char *prefix
[_EXEC_DIRECTORY_MAX
];
334 #define MANAGER_IS_SYSTEM(m) ((m)->unit_file_scope == UNIT_FILE_SYSTEM)
335 #define MANAGER_IS_USER(m) ((m)->unit_file_scope != UNIT_FILE_SYSTEM)
337 #define MANAGER_IS_RELOADING(m) ((m)->n_reloading > 0)
339 int manager_new(UnitFileScope scope
, unsigned test_run_flags
, Manager
**m
);
340 Manager
* manager_free(Manager
*m
);
342 void manager_enumerate(Manager
*m
);
343 int manager_startup(Manager
*m
, FILE *serialization
, FDSet
*fds
);
345 Job
*manager_get_job(Manager
*m
, uint32_t id
);
346 Unit
*manager_get_unit(Manager
*m
, const char *name
);
348 int manager_get_job_from_dbus_path(Manager
*m
, const char *s
, Job
**_j
);
350 int manager_load_unit_prepare(Manager
*m
, const char *name
, const char *path
, sd_bus_error
*e
, Unit
**_ret
);
351 int manager_load_unit(Manager
*m
, const char *name
, const char *path
, sd_bus_error
*e
, Unit
**_ret
);
352 int manager_load_unit_from_dbus_path(Manager
*m
, const char *s
, sd_bus_error
*e
, Unit
**_u
);
354 int manager_add_job(Manager
*m
, JobType type
, Unit
*unit
, JobMode mode
, sd_bus_error
*e
, Job
**_ret
);
355 int manager_add_job_by_name(Manager
*m
, JobType type
, const char *name
, JobMode mode
, sd_bus_error
*e
, Job
**_ret
);
356 int manager_add_job_by_name_and_warn(Manager
*m
, JobType type
, const char *name
, JobMode mode
, Job
**ret
);
357 int manager_propagate_reload(Manager
*m
, Unit
*unit
, JobMode mode
, sd_bus_error
*e
);
359 void manager_dump_units(Manager
*s
, FILE *f
, const char *prefix
);
360 void manager_dump_jobs(Manager
*s
, FILE *f
, const char *prefix
);
362 void manager_clear_jobs(Manager
*m
);
364 unsigned manager_dispatch_load_queue(Manager
*m
);
366 int manager_environment_add(Manager
*m
, char **minus
, char **plus
);
367 int manager_set_default_rlimits(Manager
*m
, struct rlimit
**default_rlimit
);
369 int manager_loop(Manager
*m
);
371 int manager_open_serialization(Manager
*m
, FILE **_f
);
373 int manager_serialize(Manager
*m
, FILE *f
, FDSet
*fds
, bool switching_root
);
374 int manager_deserialize(Manager
*m
, FILE *f
, FDSet
*fds
);
376 int manager_reload(Manager
*m
);
378 void manager_reset_failed(Manager
*m
);
380 void manager_send_unit_audit(Manager
*m
, Unit
*u
, int type
, bool success
);
381 void manager_send_unit_plymouth(Manager
*m
, Unit
*u
);
383 bool manager_unit_inactive_or_pending(Manager
*m
, const char *name
);
385 void manager_check_finished(Manager
*m
);
387 void manager_recheck_journal(Manager
*m
);
389 void manager_set_show_status(Manager
*m
, ShowStatus mode
);
390 void manager_set_first_boot(Manager
*m
, bool b
);
392 void manager_status_printf(Manager
*m
, StatusType type
, const char *status
, const char *format
, ...) _printf_(4,5);
393 void manager_flip_auto_status(Manager
*m
, bool enable
);
395 Set
*manager_get_units_requiring_mounts_for(Manager
*m
, const char *path
);
397 void manager_set_exec_params(Manager
*m
, ExecParameters
*p
);
399 ManagerState
manager_state(Manager
*m
);
401 int manager_update_failed_units(Manager
*m
, Unit
*u
, bool failed
);
403 void manager_unref_uid(Manager
*m
, uid_t uid
, bool destroy_now
);
404 int manager_ref_uid(Manager
*m
, uid_t uid
, bool clean_ipc
);
406 void manager_unref_gid(Manager
*m
, gid_t gid
, bool destroy_now
);
407 int manager_ref_gid(Manager
*m
, gid_t gid
, bool destroy_now
);
409 void manager_vacuum_uid_refs(Manager
*m
);
410 void manager_vacuum_gid_refs(Manager
*m
);
412 void manager_serialize_uid_refs(Manager
*m
, FILE *f
);
413 void manager_deserialize_uid_refs_one(Manager
*m
, const char *value
);
415 void manager_serialize_gid_refs(Manager
*m
, FILE *f
);
416 void manager_deserialize_gid_refs_one(Manager
*m
, const char *value
);
418 const char *manager_state_to_string(ManagerState m
) _const_
;
419 ManagerState
manager_state_from_string(const char *s
) _pure_
;
421 const char *manager_get_confirm_spawn(Manager
*m
);
422 bool manager_is_confirm_spawn_disabled(Manager
*m
);
423 void manager_disable_confirm_spawn(void);