1 /*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
6 This file is part of systemd.
8 Copyright 2010 Lennart Poettering
10 systemd is free software; you can redistribute it and/or modify it
11 under the terms of the GNU Lesser General Public License as published by
12 the Free Software Foundation; either version 2.1 of the License, or
13 (at your option) any later version.
15 systemd is distributed in the hope that it will be useful, but
16 WITHOUT ANY WARRANTY; without even the implied warranty of
17 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
18 Lesser General Public License for more details.
20 You should have received a copy of the GNU Lesser General Public License
21 along with systemd; If not, see <http://www.gnu.org/licenses/>.
31 #include "cgroup-util.h"
33 /* Enforce upper limit how many names we allow */
34 #define MANAGER_MAX_NAMES 131072 /* 128K */
36 typedef struct Manager Manager;
38 typedef enum ManagerState {
46 _MANAGER_STATE_INVALID = -1
49 typedef enum ManagerExitCode {
59 _MANAGER_EXIT_CODE_MAX,
60 _MANAGER_EXIT_CODE_INVALID = -1
63 typedef enum StatusType {
64 STATUS_TYPE_EPHEMERAL,
66 STATUS_TYPE_EMERGENCY,
74 #include "path-lookup.h"
76 #include "unit-name.h"
77 #include "exit-status.h"
78 #include "show-status.h"
79 #include "failure-action.h"
82 /* Note that the set of units we know of is allowed to be
83 * inconsistent. However the subset of it that is loaded may
84 * not, and the list of jobs may neither. */
86 /* Active jobs and units */
87 Hashmap *units; /* name string => Unit object n:1 */
88 Hashmap *jobs; /* job id => Job object 1:1 */
90 /* To make it easy to iterate through the units of a specific
91 * type we maintain a per type linked list */
92 LIST_HEAD(Unit, units_by_type[_UNIT_TYPE_MAX]);
94 /* Units that need to be loaded */
95 LIST_HEAD(Unit, load_queue); /* this is actually more a stack than a queue, but uh. */
97 /* Jobs that need to be run */
98 LIST_HEAD(Job, run_queue); /* more a stack than a queue, too */
100 /* Units and jobs that have not yet been announced via
101 * D-Bus. When something about a job changes it is added here
102 * if it is not in there yet. This allows easy coalescing of
103 * D-Bus change signals. */
104 LIST_HEAD(Unit, dbus_unit_queue);
105 LIST_HEAD(Job, dbus_job_queue);
107 /* Units to remove */
108 LIST_HEAD(Unit, cleanup_queue);
110 /* Units to check when doing GC */
111 LIST_HEAD(Unit, gc_queue);
113 /* Units that should be realized */
114 LIST_HEAD(Unit, cgroup_queue);
118 /* We use two hash tables here, since the same PID might be
119 * watched by two different units: once the unit that forked
120 * it off, and possibly a different unit to which it was
121 * joined as cgroup member. Since we know that it is either
122 * one or two units for each PID we just use to hashmaps
124 Hashmap *watch_pids1; /* pid => Unit object n:1 */
125 Hashmap *watch_pids2; /* pid => Unit object n:1 */
127 /* A set contains all units which cgroup should be refreshed after startup */
130 /* A set which contains all currently failed units */
133 sd_event_source *run_queue_event_source;
137 sd_event_source *notify_event_source;
140 sd_event_source *signal_event_source;
143 sd_event_source *time_change_event_source;
145 sd_event_source *jobs_in_progress_event_source;
147 unsigned n_snapshots;
149 LookupPaths lookup_paths;
150 Set *unit_path_cache;
154 usec_t runtime_watchdog;
155 usec_t shutdown_watchdog;
157 dual_timestamp firmware_timestamp;
158 dual_timestamp loader_timestamp;
159 dual_timestamp kernel_timestamp;
160 dual_timestamp initrd_timestamp;
161 dual_timestamp userspace_timestamp;
162 dual_timestamp finish_timestamp;
164 dual_timestamp security_start_timestamp;
165 dual_timestamp security_finish_timestamp;
166 dual_timestamp generators_start_timestamp;
167 dual_timestamp generators_finish_timestamp;
168 dual_timestamp units_load_start_timestamp;
169 dual_timestamp units_load_finish_timestamp;
171 char *generator_unit_path;
172 char *generator_unit_path_early;
173 char *generator_unit_path_late;
177 /* Data specific to the device subsystem */
178 struct udev_monitor* udev_monitor;
179 sd_event_source *udev_event_source;
180 Hashmap *devices_by_sysfs;
182 /* Data specific to the mount subsystem */
183 FILE *proc_self_mountinfo;
184 sd_event_source *mount_event_source;
186 sd_event_source *mount_utab_event_source;
188 /* Data specific to the swap filesystem */
190 sd_event_source *swap_event_source;
191 Hashmap *swaps_by_devnode;
193 /* Data specific to the D-Bus subsystem */
194 sd_bus *api_bus, *system_bus;
196 int private_listen_fd;
197 sd_event_source *private_listen_event_source;
199 /* Contains all the clients that are subscribed to signals via
200 the API bus. Note that private bus connections are always
201 considered subscribes, since they last for very short only,
202 and it is much simpler that way. */
203 sd_bus_track *subscribed;
204 char **deserialized_subscribed;
206 sd_bus_message *queued_message; /* This is used during reloading:
207 * before the reload we queue the
208 * reply message here, and
209 * afterwards we send it */
210 sd_bus *queued_message_bus; /* The connection to send the queued message on */
212 Hashmap *watch_bus; /* D-Bus names => Unit object n:1 */
214 bool send_reloading_done;
216 uint32_t current_job_id;
217 uint32_t default_unit_job_id;
219 /* Data specific to the Automount subsystem */
222 /* Data specific to the cgroup subsystem */
223 Hashmap *cgroup_unit;
224 CGroupControllerMask cgroup_supported;
228 unsigned n_in_gc_queue;
230 /* Make sure the user cannot accidentally unmount our cgroup
235 SystemdRunningAs running_as;
236 ManagerExitCode exit_code:5;
238 bool dispatching_load_queue:1;
239 bool dispatching_dbus_queue:1;
246 ShowStatus show_status;
248 bool no_console_output;
250 ExecOutput default_std_output, default_std_error;
252 usec_t default_restart_usec, default_timeout_start_usec, default_timeout_stop_usec;
254 usec_t default_start_limit_interval;
255 unsigned default_start_limit_burst;
257 bool default_cpu_accounting;
258 bool default_memory_accounting;
259 bool default_blockio_accounting;
261 usec_t default_timer_accuracy_usec;
263 struct rlimit *rlimit[_RLIMIT_MAX];
265 /* non-zero if we are reloading or reexecuting, */
268 unsigned n_installed_jobs;
269 unsigned n_failed_jobs;
271 /* Jobs in progress watching */
272 unsigned n_running_jobs;
273 unsigned n_on_console;
274 unsigned jobs_in_progress_iteration;
276 /* Do we have any outstanding password prompts? */
277 int have_ask_password;
278 int ask_password_inotify_fd;
279 sd_event_source *ask_password_event_source;
281 /* Type=idle pipes */
283 sd_event_source *idle_pipe_event_source;
286 char *switch_root_init;
288 /* This maps all possible path prefixes to the units needing
289 * them. It's a hashmap with a path string as key and a Set as
290 * value where Unit objects are contained. */
291 Hashmap *units_requiring_mounts_for;
293 /* Reference to the kdbus bus control fd */
296 /* Used for processing polkit authorization responses */
297 Hashmap *polkit_registry;
300 int manager_new(SystemdRunningAs running_as, bool test_run, Manager **m);
301 Manager* manager_free(Manager *m);
303 int manager_enumerate(Manager *m);
304 int manager_startup(Manager *m, FILE *serialization, FDSet *fds);
306 Job *manager_get_job(Manager *m, uint32_t id);
307 Unit *manager_get_unit(Manager *m, const char *name);
309 int manager_get_unit_by_path(Manager *m, const char *path, const char *suffix, Unit **_found);
311 int manager_get_job_from_dbus_path(Manager *m, const char *s, Job **_j);
313 int manager_load_unit_prepare(Manager *m, const char *name, const char *path, sd_bus_error *e, Unit **_ret);
314 int manager_load_unit(Manager *m, const char *name, const char *path, sd_bus_error *e, Unit **_ret);
315 int manager_load_unit_from_dbus_path(Manager *m, const char *s, sd_bus_error *e, Unit **_u);
317 int manager_add_job(Manager *m, JobType type, Unit *unit, JobMode mode, bool force, sd_bus_error *e, Job **_ret);
318 int manager_add_job_by_name(Manager *m, JobType type, const char *name, JobMode mode, bool force, sd_bus_error *e, Job **_ret);
320 void manager_dump_units(Manager *s, FILE *f, const char *prefix);
321 void manager_dump_jobs(Manager *s, FILE *f, const char *prefix);
323 void manager_clear_jobs(Manager *m);
325 unsigned manager_dispatch_load_queue(Manager *m);
327 int manager_environment_add(Manager *m, char **minus, char **plus);
328 int manager_set_default_rlimits(Manager *m, struct rlimit **default_rlimit);
330 int manager_loop(Manager *m);
332 void manager_dispatch_bus_name_owner_changed(Manager *m, const char *name, const char* old_owner, const char *new_owner);
334 int manager_open_serialization(Manager *m, FILE **_f);
336 int manager_serialize(Manager *m, FILE *f, FDSet *fds, bool switching_root);
337 int manager_deserialize(Manager *m, FILE *f, FDSet *fds);
339 int manager_reload(Manager *m);
341 bool manager_is_reloading_or_reexecuting(Manager *m) _pure_;
343 void manager_reset_failed(Manager *m);
345 void manager_send_unit_audit(Manager *m, Unit *u, int type, bool success);
346 void manager_send_unit_plymouth(Manager *m, Unit *u);
348 bool manager_unit_inactive_or_pending(Manager *m, const char *name);
350 void manager_check_finished(Manager *m);
352 void manager_run_generators(Manager *m);
353 void manager_undo_generators(Manager *m);
355 void manager_recheck_journal(Manager *m);
357 void manager_set_show_status(Manager *m, ShowStatus mode);
358 void manager_set_first_boot(Manager *m, bool b);
360 void manager_status_printf(Manager *m, StatusType type, const char *status, const char *format, ...) _printf_(4,5);
361 void manager_flip_auto_status(Manager *m, bool enable);
363 Set *manager_get_units_requiring_mounts_for(Manager *m, const char *path);
365 const char *manager_get_runtime_prefix(Manager *m);
367 ManagerState manager_state(Manager *m);
369 const char *manager_state_to_string(ManagerState m) _const_;
370 ManagerState manager_state_from_string(const char *s) _pure_;