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,
73 #include "path-lookup.h"
75 #include "unit-name.h"
76 #include "exit-status.h"
77 #include "show-status.h"
78 #include "failure-action.h"
81 /* Note that the set of units we know of is allowed to be
82 * inconsistent. However the subset of it that is loaded may
83 * not, and the list of jobs may neither. */
85 /* Active jobs and units */
86 Hashmap *units; /* name string => Unit object n:1 */
87 Hashmap *jobs; /* job id => Job object 1:1 */
89 /* To make it easy to iterate through the units of a specific
90 * type we maintain a per type linked list */
91 LIST_HEAD(Unit, units_by_type[_UNIT_TYPE_MAX]);
93 /* Units that need to be loaded */
94 LIST_HEAD(Unit, load_queue); /* this is actually more a stack than a queue, but uh. */
96 /* Jobs that need to be run */
97 LIST_HEAD(Job, run_queue); /* more a stack than a queue, too */
99 /* Units and jobs that have not yet been announced via
100 * D-Bus. When something about a job changes it is added here
101 * if it is not in there yet. This allows easy coalescing of
102 * D-Bus change signals. */
103 LIST_HEAD(Unit, dbus_unit_queue);
104 LIST_HEAD(Job, dbus_job_queue);
106 /* Units to remove */
107 LIST_HEAD(Unit, cleanup_queue);
109 /* Units to check when doing GC */
110 LIST_HEAD(Unit, gc_queue);
112 /* Units that should be realized */
113 LIST_HEAD(Unit, cgroup_queue);
117 /* We use two hash tables here, since the same PID might be
118 * watched by two different units: once the unit that forked
119 * it off, and possibly a different unit to which it was
120 * joined as cgroup member. Since we know that it is either
121 * one or two units for each PID we just use to hashmaps
123 Hashmap *watch_pids1; /* pid => Unit object n:1 */
124 Hashmap *watch_pids2; /* pid => Unit object n:1 */
126 /* A set contains all units which cgroup should be refreshed after startup */
129 /* A set which contains all currently failed units */
132 sd_event_source *run_queue_event_source;
136 sd_event_source *notify_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 unsigned n_snapshots;
148 LookupPaths lookup_paths;
149 Set *unit_path_cache;
153 usec_t runtime_watchdog;
154 usec_t shutdown_watchdog;
156 dual_timestamp firmware_timestamp;
157 dual_timestamp loader_timestamp;
158 dual_timestamp kernel_timestamp;
159 dual_timestamp initrd_timestamp;
160 dual_timestamp userspace_timestamp;
161 dual_timestamp finish_timestamp;
163 dual_timestamp security_start_timestamp;
164 dual_timestamp security_finish_timestamp;
165 dual_timestamp generators_start_timestamp;
166 dual_timestamp generators_finish_timestamp;
167 dual_timestamp units_load_start_timestamp;
168 dual_timestamp units_load_finish_timestamp;
170 char *generator_unit_path;
171 char *generator_unit_path_early;
172 char *generator_unit_path_late;
176 /* Data specific to the device subsystem */
177 struct udev_monitor* udev_monitor;
178 sd_event_source *udev_event_source;
179 Hashmap *devices_by_sysfs;
181 /* Data specific to the mount subsystem */
182 FILE *proc_self_mountinfo;
183 sd_event_source *mount_event_source;
185 /* Data specific to the swap filesystem */
187 sd_event_source *swap_event_source;
188 Hashmap *swaps_by_devnode;
190 /* Data specific to the D-Bus subsystem */
191 sd_bus *api_bus, *system_bus;
193 int private_listen_fd;
194 sd_event_source *private_listen_event_source;
196 /* Contains all the clients that are subscribed to signals via
197 the API bus. Note that private bus connections are always
198 considered subscribes, since they last for very short only,
199 and it is much simpler that way. */
200 sd_bus_track *subscribed;
201 char **deserialized_subscribed;
203 sd_bus_message *queued_message; /* This is used during reloading:
204 * before the reload we queue the
205 * reply message here, and
206 * afterwards we send it */
207 sd_bus *queued_message_bus; /* The connection to send the queued message on */
209 Hashmap *watch_bus; /* D-Bus names => Unit object n:1 */
211 bool send_reloading_done;
213 uint32_t current_job_id;
214 uint32_t default_unit_job_id;
216 /* Data specific to the Automount subsystem */
219 /* Data specific to the cgroup subsystem */
220 Hashmap *cgroup_unit;
221 CGroupControllerMask cgroup_supported;
225 unsigned n_in_gc_queue;
227 /* Make sure the user cannot accidentally unmount our cgroup
232 SystemdRunningAs running_as;
233 ManagerExitCode exit_code:5;
235 bool dispatching_load_queue:1;
236 bool dispatching_dbus_queue:1;
243 ShowStatus show_status;
245 bool no_console_output;
247 ExecOutput default_std_output, default_std_error;
249 usec_t default_restart_usec, default_timeout_start_usec, default_timeout_stop_usec;
251 usec_t default_start_limit_interval;
252 unsigned default_start_limit_burst;
254 bool default_cpu_accounting;
255 bool default_memory_accounting;
256 bool default_blockio_accounting;
258 usec_t default_timer_accuracy_usec;
260 struct rlimit *rlimit[_RLIMIT_MAX];
262 /* non-zero if we are reloading or reexecuting, */
265 unsigned n_installed_jobs;
266 unsigned n_failed_jobs;
268 /* Jobs in progress watching */
269 unsigned n_running_jobs;
270 unsigned n_on_console;
271 unsigned jobs_in_progress_iteration;
273 /* Do we have any outstanding password prompts? */
274 int have_ask_password;
275 int ask_password_inotify_fd;
276 sd_event_source *ask_password_event_source;
278 /* Type=idle pipes */
280 sd_event_source *idle_pipe_event_source;
283 char *switch_root_init;
285 /* This maps all possible path prefixes to the units needing
286 * them. It's a hashmap with a path string as key and a Set as
287 * value where Unit objects are contained. */
288 Hashmap *units_requiring_mounts_for;
290 /* Reference to the kdbus bus control fd */
293 /* Used for processing polkit authorization responses */
294 Hashmap *polkit_registry;
297 int manager_new(SystemdRunningAs running_as, bool test_run, Manager **m);
298 void manager_free(Manager *m);
300 int manager_enumerate(Manager *m);
301 int manager_startup(Manager *m, FILE *serialization, FDSet *fds);
303 Job *manager_get_job(Manager *m, uint32_t id);
304 Unit *manager_get_unit(Manager *m, const char *name);
306 int manager_get_unit_by_path(Manager *m, const char *path, const char *suffix, Unit **_found);
308 int manager_get_job_from_dbus_path(Manager *m, const char *s, Job **_j);
310 int manager_load_unit_prepare(Manager *m, const char *name, const char *path, sd_bus_error *e, Unit **_ret);
311 int manager_load_unit(Manager *m, const char *name, const char *path, sd_bus_error *e, Unit **_ret);
312 int manager_load_unit_from_dbus_path(Manager *m, const char *s, sd_bus_error *e, Unit **_u);
314 int manager_add_job(Manager *m, JobType type, Unit *unit, JobMode mode, bool force, sd_bus_error *e, Job **_ret);
315 int manager_add_job_by_name(Manager *m, JobType type, const char *name, JobMode mode, bool force, sd_bus_error *e, Job **_ret);
317 void manager_dump_units(Manager *s, FILE *f, const char *prefix);
318 void manager_dump_jobs(Manager *s, FILE *f, const char *prefix);
320 void manager_clear_jobs(Manager *m);
322 unsigned manager_dispatch_load_queue(Manager *m);
324 int manager_environment_add(Manager *m, char **minus, char **plus);
325 int manager_set_default_rlimits(Manager *m, struct rlimit **default_rlimit);
327 int manager_loop(Manager *m);
329 void manager_dispatch_bus_name_owner_changed(Manager *m, const char *name, const char* old_owner, const char *new_owner);
331 int manager_open_serialization(Manager *m, FILE **_f);
333 int manager_serialize(Manager *m, FILE *f, FDSet *fds, bool switching_root);
334 int manager_deserialize(Manager *m, FILE *f, FDSet *fds);
336 int manager_reload(Manager *m);
338 bool manager_is_reloading_or_reexecuting(Manager *m) _pure_;
340 void manager_reset_failed(Manager *m);
342 void manager_send_unit_audit(Manager *m, Unit *u, int type, bool success);
343 void manager_send_unit_plymouth(Manager *m, Unit *u);
345 bool manager_unit_inactive_or_pending(Manager *m, const char *name);
347 void manager_check_finished(Manager *m);
349 void manager_run_generators(Manager *m);
350 void manager_undo_generators(Manager *m);
352 void manager_recheck_journal(Manager *m);
354 void manager_set_show_status(Manager *m, ShowStatus mode);
355 void manager_set_first_boot(Manager *m, bool b);
357 void manager_status_printf(Manager *m, StatusType type, const char *status, const char *format, ...) _printf_(4,5);
358 void manager_flip_auto_status(Manager *m, bool enable);
360 Set *manager_get_units_requiring_mounts_for(Manager *m, const char *path);
362 const char *manager_get_runtime_prefix(Manager *m);
364 ManagerState manager_state(Manager *m);
366 const char *manager_state_to_string(ManagerState m) _const_;
367 ManagerState manager_state_from_string(const char *s) _pure_;