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 /* Note that the set of units we know of is allowed to be
79 * inconsistent. However the subset of it that is loaded may
80 * not, and the list of jobs may neither. */
82 /* Active jobs and units */
83 Hashmap
*units
; /* name string => Unit object n:1 */
84 Hashmap
*jobs
; /* job id => Job object 1:1 */
86 /* To make it easy to iterate through the units of a specific
87 * type we maintain a per type linked list */
88 LIST_HEAD(Unit
, units_by_type
[_UNIT_TYPE_MAX
]);
90 /* Units that need to be loaded */
91 LIST_HEAD(Unit
, load_queue
); /* this is actually more a stack than a queue, but uh. */
93 /* Jobs that need to be run */
94 LIST_HEAD(Job
, run_queue
); /* more a stack than a queue, too */
96 /* Units and jobs that have not yet been announced via
97 * D-Bus. When something about a job changes it is added here
98 * if it is not in there yet. This allows easy coalescing of
99 * D-Bus change signals. */
100 LIST_HEAD(Unit
, dbus_unit_queue
);
101 LIST_HEAD(Job
, dbus_job_queue
);
103 /* Units to remove */
104 LIST_HEAD(Unit
, cleanup_queue
);
106 /* Units to check when doing GC */
107 LIST_HEAD(Unit
, gc_queue
);
109 /* Units that should be realized */
110 LIST_HEAD(Unit
, cgroup_queue
);
114 /* We use two hash tables here, since the same PID might be
115 * watched by two different units: once the unit that forked
116 * it off, and possibly a different unit to which it was
117 * joined as cgroup member. Since we know that it is either
118 * one or two units for each PID we just use to hashmaps
120 Hashmap
*watch_pids1
; /* pid => Unit object n:1 */
121 Hashmap
*watch_pids2
; /* pid => Unit object n:1 */
123 /* A set contains all units which cgroup should be refreshed after startup */
126 /* A set which contains all currently failed units */
129 sd_event_source
*run_queue_event_source
;
133 sd_event_source
*notify_event_source
;
135 int cgroups_agent_fd
;
136 sd_event_source
*cgroups_agent_event_source
;
139 sd_event_source
*signal_event_source
;
142 sd_event_source
*time_change_event_source
;
144 sd_event_source
*jobs_in_progress_event_source
;
146 UnitFileScope unit_file_scope
;
147 LookupPaths lookup_paths
;
148 Set
*unit_path_cache
;
152 usec_t runtime_watchdog
;
153 usec_t shutdown_watchdog
;
155 dual_timestamp firmware_timestamp
;
156 dual_timestamp loader_timestamp
;
157 dual_timestamp kernel_timestamp
;
158 dual_timestamp initrd_timestamp
;
159 dual_timestamp userspace_timestamp
;
160 dual_timestamp finish_timestamp
;
162 dual_timestamp security_start_timestamp
;
163 dual_timestamp security_finish_timestamp
;
164 dual_timestamp generators_start_timestamp
;
165 dual_timestamp generators_finish_timestamp
;
166 dual_timestamp units_load_start_timestamp
;
167 dual_timestamp units_load_finish_timestamp
;
171 /* Data specific to the device subsystem */
172 struct udev_monitor
* udev_monitor
;
173 sd_event_source
*udev_event_source
;
174 Hashmap
*devices_by_sysfs
;
176 /* Data specific to the mount subsystem */
177 struct libmnt_monitor
*mount_monitor
;
178 sd_event_source
*mount_event_source
;
180 /* Data specific to the swap filesystem */
182 sd_event_source
*swap_event_source
;
183 Hashmap
*swaps_by_devnode
;
185 /* Data specific to the D-Bus subsystem */
186 sd_bus
*api_bus
, *system_bus
;
188 int private_listen_fd
;
189 sd_event_source
*private_listen_event_source
;
191 /* Contains all the clients that are subscribed to signals via
192 the API bus. Note that private bus connections are always
193 considered subscribes, since they last for very short only,
194 and it is much simpler that way. */
195 sd_bus_track
*subscribed
;
196 char **deserialized_subscribed
;
198 /* This is used during reloading: before the reload we queue
199 * the reply message here, and afterwards we send it */
200 sd_bus_message
*queued_message
;
202 Hashmap
*watch_bus
; /* D-Bus names => Unit object n:1 */
204 bool send_reloading_done
;
206 uint32_t current_job_id
;
207 uint32_t default_unit_job_id
;
209 /* Data specific to the Automount subsystem */
212 /* Data specific to the cgroup subsystem */
213 Hashmap
*cgroup_unit
;
214 CGroupMask cgroup_supported
;
217 /* Notifications from cgroups, when the unified hierarchy is
218 * used is done via inotify. */
219 int cgroup_inotify_fd
;
220 sd_event_source
*cgroup_inotify_event_source
;
221 Hashmap
*cgroup_inotify_wd_unit
;
223 /* Make sure the user cannot accidentally unmount our cgroup
228 unsigned n_in_gc_queue
;
231 ManagerExitCode exit_code
:5;
233 bool dispatching_load_queue
:1;
234 bool dispatching_dbus_queue
:1;
240 /* If non-zero, exit with the following value when the systemd
241 * process terminate. Useful for containers: systemd-nspawn could get
242 * the return value. */
243 uint8_t return_value
;
245 ShowStatus show_status
;
247 bool no_console_output
;
249 ExecOutput default_std_output
, default_std_error
;
251 usec_t default_restart_usec
, default_timeout_start_usec
, default_timeout_stop_usec
;
253 usec_t default_start_limit_interval
;
254 unsigned default_start_limit_burst
;
256 bool default_cpu_accounting
;
257 bool default_memory_accounting
;
258 bool default_io_accounting
;
259 bool default_blockio_accounting
;
260 bool default_tasks_accounting
;
262 uint64_t default_tasks_max
;
263 usec_t default_timer_accuracy_usec
;
265 struct rlimit
*rlimit
[_RLIMIT_MAX
];
267 /* non-zero if we are reloading or reexecuting, */
270 unsigned n_installed_jobs
;
271 unsigned n_failed_jobs
;
273 /* Jobs in progress watching */
274 unsigned n_running_jobs
;
275 unsigned n_on_console
;
276 unsigned jobs_in_progress_iteration
;
278 /* Do we have any outstanding password prompts? */
279 int have_ask_password
;
280 int ask_password_inotify_fd
;
281 sd_event_source
*ask_password_event_source
;
283 /* Type=idle pipes */
285 sd_event_source
*idle_pipe_event_source
;
288 char *switch_root_init
;
290 /* This maps all possible path prefixes to the units needing
291 * them. It's a hashmap with a path string as key and a Set as
292 * value where Unit objects are contained. */
293 Hashmap
*units_requiring_mounts_for
;
295 /* Reference to the kdbus bus control fd */
298 /* Used for processing polkit authorization responses */
299 Hashmap
*polkit_registry
;
301 /* Dynamic users/groups, indexed by their name */
302 Hashmap
*dynamic_users
;
304 /* When the user hits C-A-D more than 7 times per 2s, reboot immediately... */
305 RateLimit ctrl_alt_del_ratelimit
;
307 const char *unit_log_field
;
308 const char *unit_log_format_string
;
310 int first_boot
; /* tri-state */
313 #define MANAGER_IS_SYSTEM(m) ((m)->unit_file_scope == UNIT_FILE_SYSTEM)
314 #define MANAGER_IS_USER(m) ((m)->unit_file_scope != UNIT_FILE_SYSTEM)
316 #define MANAGER_IS_RELOADING(m) ((m)->n_reloading > 0)
318 int manager_new(UnitFileScope scope
, bool test_run
, Manager
**m
);
319 Manager
* manager_free(Manager
*m
);
321 void manager_enumerate(Manager
*m
);
322 int manager_startup(Manager
*m
, FILE *serialization
, FDSet
*fds
);
324 Job
*manager_get_job(Manager
*m
, uint32_t id
);
325 Unit
*manager_get_unit(Manager
*m
, const char *name
);
327 int manager_get_job_from_dbus_path(Manager
*m
, const char *s
, Job
**_j
);
329 int manager_load_unit_prepare(Manager
*m
, const char *name
, const char *path
, sd_bus_error
*e
, Unit
**_ret
);
330 int manager_load_unit(Manager
*m
, const char *name
, const char *path
, sd_bus_error
*e
, Unit
**_ret
);
331 int manager_load_unit_from_dbus_path(Manager
*m
, const char *s
, sd_bus_error
*e
, Unit
**_u
);
333 int manager_add_job(Manager
*m
, JobType type
, Unit
*unit
, JobMode mode
, sd_bus_error
*e
, Job
**_ret
);
334 int manager_add_job_by_name(Manager
*m
, JobType type
, const char *name
, JobMode mode
, sd_bus_error
*e
, Job
**_ret
);
335 int manager_add_job_by_name_and_warn(Manager
*m
, JobType type
, const char *name
, JobMode mode
, Job
**ret
);
337 void manager_dump_units(Manager
*s
, FILE *f
, const char *prefix
);
338 void manager_dump_jobs(Manager
*s
, FILE *f
, const char *prefix
);
340 void manager_clear_jobs(Manager
*m
);
342 unsigned manager_dispatch_load_queue(Manager
*m
);
344 int manager_environment_add(Manager
*m
, char **minus
, char **plus
);
345 int manager_set_default_rlimits(Manager
*m
, struct rlimit
**default_rlimit
);
347 int manager_loop(Manager
*m
);
349 int manager_open_serialization(Manager
*m
, FILE **_f
);
351 int manager_serialize(Manager
*m
, FILE *f
, FDSet
*fds
, bool switching_root
);
352 int manager_deserialize(Manager
*m
, FILE *f
, FDSet
*fds
);
354 int manager_reload(Manager
*m
);
356 void manager_reset_failed(Manager
*m
);
358 void manager_send_unit_audit(Manager
*m
, Unit
*u
, int type
, bool success
);
359 void manager_send_unit_plymouth(Manager
*m
, Unit
*u
);
361 bool manager_unit_inactive_or_pending(Manager
*m
, const char *name
);
363 void manager_check_finished(Manager
*m
);
365 void manager_recheck_journal(Manager
*m
);
367 void manager_set_show_status(Manager
*m
, ShowStatus mode
);
368 void manager_set_first_boot(Manager
*m
, bool b
);
370 void manager_status_printf(Manager
*m
, StatusType type
, const char *status
, const char *format
, ...) _printf_(4,5);
371 void manager_flip_auto_status(Manager
*m
, bool enable
);
373 Set
*manager_get_units_requiring_mounts_for(Manager
*m
, const char *path
);
375 const char *manager_get_runtime_prefix(Manager
*m
);
377 ManagerState
manager_state(Manager
*m
);
379 int manager_update_failed_units(Manager
*m
, Unit
*u
, bool failed
);
381 const char *manager_state_to_string(ManagerState m
) _const_
;
382 ManagerState
manager_state_from_string(const char *s
) _pure_
;