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"
35 #include "ratelimit.h"
37 /* Enforce upper limit how many names we allow */
38 #define MANAGER_MAX_NAMES 131072 /* 128K */
40 typedef struct Manager Manager;
42 typedef enum ManagerState {
50 _MANAGER_STATE_INVALID = -1
53 typedef enum ManagerExitCode {
63 _MANAGER_EXIT_CODE_MAX,
64 _MANAGER_EXIT_CODE_INVALID = -1
67 typedef enum StatusType {
68 STATUS_TYPE_EPHEMERAL,
70 STATUS_TYPE_EMERGENCY,
75 #include "path-lookup.h"
77 #include "unit-name.h"
78 #include "exit-status.h"
79 #include "show-status.h"
80 #include "failure-action.h"
83 /* Note that the set of units we know of is allowed to be
84 * inconsistent. However the subset of it that is loaded may
85 * not, and the list of jobs may neither. */
87 /* Active jobs and units */
88 Hashmap *units; /* name string => Unit object n:1 */
89 Hashmap *jobs; /* job id => Job object 1:1 */
91 /* To make it easy to iterate through the units of a specific
92 * type we maintain a per type linked list */
93 LIST_HEAD(Unit, units_by_type[_UNIT_TYPE_MAX]);
95 /* Units that need to be loaded */
96 LIST_HEAD(Unit, load_queue); /* this is actually more a stack than a queue, but uh. */
98 /* Jobs that need to be run */
99 LIST_HEAD(Job, run_queue); /* more a stack than a queue, too */
101 /* Units and jobs that have not yet been announced via
102 * D-Bus. When something about a job changes it is added here
103 * if it is not in there yet. This allows easy coalescing of
104 * D-Bus change signals. */
105 LIST_HEAD(Unit, dbus_unit_queue);
106 LIST_HEAD(Job, dbus_job_queue);
108 /* Units to remove */
109 LIST_HEAD(Unit, cleanup_queue);
111 /* Units to check when doing GC */
112 LIST_HEAD(Unit, gc_queue);
114 /* Units that should be realized */
115 LIST_HEAD(Unit, cgroup_queue);
119 /* We use two hash tables here, since the same PID might be
120 * watched by two different units: once the unit that forked
121 * it off, and possibly a different unit to which it was
122 * joined as cgroup member. Since we know that it is either
123 * one or two units for each PID we just use to hashmaps
125 Hashmap *watch_pids1; /* pid => Unit object n:1 */
126 Hashmap *watch_pids2; /* pid => Unit object n:1 */
128 /* A set contains all units which cgroup should be refreshed after startup */
131 /* A set which contains all currently failed units */
134 sd_event_source *run_queue_event_source;
138 sd_event_source *notify_event_source;
141 sd_event_source *signal_event_source;
144 sd_event_source *time_change_event_source;
146 sd_event_source *jobs_in_progress_event_source;
148 unsigned n_snapshots;
150 LookupPaths lookup_paths;
151 Set *unit_path_cache;
155 usec_t runtime_watchdog;
156 usec_t shutdown_watchdog;
158 dual_timestamp firmware_timestamp;
159 dual_timestamp loader_timestamp;
160 dual_timestamp kernel_timestamp;
161 dual_timestamp initrd_timestamp;
162 dual_timestamp userspace_timestamp;
163 dual_timestamp finish_timestamp;
165 dual_timestamp security_start_timestamp;
166 dual_timestamp security_finish_timestamp;
167 dual_timestamp generators_start_timestamp;
168 dual_timestamp generators_finish_timestamp;
169 dual_timestamp units_load_start_timestamp;
170 dual_timestamp units_load_finish_timestamp;
172 char *generator_unit_path;
173 char *generator_unit_path_early;
174 char *generator_unit_path_late;
178 /* Data specific to the device subsystem */
179 struct udev_monitor* udev_monitor;
180 sd_event_source *udev_event_source;
181 Hashmap *devices_by_sysfs;
183 /* Data specific to the mount subsystem */
184 FILE *proc_self_mountinfo;
185 sd_event_source *mount_event_source;
187 sd_event_source *mount_utab_event_source;
189 /* Data specific to the swap filesystem */
191 sd_event_source *swap_event_source;
192 Hashmap *swaps_by_devnode;
194 /* Data specific to the D-Bus subsystem */
195 sd_bus *api_bus, *system_bus;
197 int private_listen_fd;
198 sd_event_source *private_listen_event_source;
200 /* Contains all the clients that are subscribed to signals via
201 the API bus. Note that private bus connections are always
202 considered subscribes, since they last for very short only,
203 and it is much simpler that way. */
204 sd_bus_track *subscribed;
205 char **deserialized_subscribed;
207 sd_bus_message *queued_message; /* This is used during reloading:
208 * before the reload we queue the
209 * reply message here, and
210 * afterwards we send it */
211 sd_bus *queued_message_bus; /* The connection to send the queued message on */
213 Hashmap *watch_bus; /* D-Bus names => Unit object n:1 */
215 bool send_reloading_done;
217 uint32_t current_job_id;
218 uint32_t default_unit_job_id;
220 /* Data specific to the Automount subsystem */
223 /* Data specific to the cgroup subsystem */
224 Hashmap *cgroup_unit;
225 CGroupControllerMask cgroup_supported;
229 unsigned n_in_gc_queue;
231 /* Make sure the user cannot accidentally unmount our cgroup
236 SystemdRunningAs running_as;
237 ManagerExitCode exit_code:5;
239 bool dispatching_load_queue:1;
240 bool dispatching_dbus_queue:1;
247 ShowStatus show_status;
249 bool no_console_output;
251 ExecOutput default_std_output, default_std_error;
253 usec_t default_restart_usec, default_timeout_start_usec, default_timeout_stop_usec;
255 usec_t default_start_limit_interval;
256 unsigned default_start_limit_burst;
258 bool default_cpu_accounting;
259 bool default_memory_accounting;
260 bool default_blockio_accounting;
262 usec_t default_timer_accuracy_usec;
264 struct rlimit *rlimit[_RLIMIT_MAX];
266 /* non-zero if we are reloading or reexecuting, */
269 unsigned n_installed_jobs;
270 unsigned n_failed_jobs;
272 /* Jobs in progress watching */
273 unsigned n_running_jobs;
274 unsigned n_on_console;
275 unsigned jobs_in_progress_iteration;
277 /* Do we have any outstanding password prompts? */
278 int have_ask_password;
279 int ask_password_inotify_fd;
280 sd_event_source *ask_password_event_source;
282 /* Type=idle pipes */
284 sd_event_source *idle_pipe_event_source;
287 char *switch_root_init;
289 /* This maps all possible path prefixes to the units needing
290 * them. It's a hashmap with a path string as key and a Set as
291 * value where Unit objects are contained. */
292 Hashmap *units_requiring_mounts_for;
294 /* Reference to the kdbus bus control fd */
297 /* Used for processing polkit authorization responses */
298 Hashmap *polkit_registry;
300 /* When the user hits C-A-D more than 7 times per 2s, reboot immediately... */
301 RateLimit ctrl_alt_del_ratelimit;
304 int manager_new(SystemdRunningAs running_as, bool test_run, Manager **m);
305 Manager* manager_free(Manager *m);
307 int manager_enumerate(Manager *m);
308 int manager_startup(Manager *m, FILE *serialization, FDSet *fds);
310 Job *manager_get_job(Manager *m, uint32_t id);
311 Unit *manager_get_unit(Manager *m, const char *name);
313 int manager_get_unit_by_path(Manager *m, const char *path, const char *suffix, Unit **_found);
315 int manager_get_job_from_dbus_path(Manager *m, const char *s, Job **_j);
317 int manager_load_unit_prepare(Manager *m, const char *name, const char *path, sd_bus_error *e, Unit **_ret);
318 int manager_load_unit(Manager *m, const char *name, const char *path, sd_bus_error *e, Unit **_ret);
319 int manager_load_unit_from_dbus_path(Manager *m, const char *s, sd_bus_error *e, Unit **_u);
321 int manager_add_job(Manager *m, JobType type, Unit *unit, JobMode mode, bool force, sd_bus_error *e, Job **_ret);
322 int manager_add_job_by_name(Manager *m, JobType type, const char *name, JobMode mode, bool force, sd_bus_error *e, Job **_ret);
324 void manager_dump_units(Manager *s, FILE *f, const char *prefix);
325 void manager_dump_jobs(Manager *s, FILE *f, const char *prefix);
327 void manager_clear_jobs(Manager *m);
329 unsigned manager_dispatch_load_queue(Manager *m);
331 int manager_environment_add(Manager *m, char **minus, char **plus);
332 int manager_set_default_rlimits(Manager *m, struct rlimit **default_rlimit);
334 int manager_loop(Manager *m);
336 void manager_dispatch_bus_name_owner_changed(Manager *m, const char *name, const char* old_owner, const char *new_owner);
338 int manager_open_serialization(Manager *m, FILE **_f);
340 int manager_serialize(Manager *m, FILE *f, FDSet *fds, bool switching_root);
341 int manager_deserialize(Manager *m, FILE *f, FDSet *fds);
343 int manager_reload(Manager *m);
345 bool manager_is_reloading_or_reexecuting(Manager *m) _pure_;
347 void manager_reset_failed(Manager *m);
349 void manager_send_unit_audit(Manager *m, Unit *u, int type, bool success);
350 void manager_send_unit_plymouth(Manager *m, Unit *u);
352 bool manager_unit_inactive_or_pending(Manager *m, const char *name);
354 void manager_check_finished(Manager *m);
356 void manager_recheck_journal(Manager *m);
358 void manager_set_show_status(Manager *m, ShowStatus mode);
359 void manager_set_first_boot(Manager *m, bool b);
361 void manager_status_printf(Manager *m, StatusType type, const char *status, const char *format, ...) _printf_(4,5);
362 void manager_flip_auto_status(Manager *m, bool enable);
364 Set *manager_get_units_requiring_mounts_for(Manager *m, const char *path);
366 const char *manager_get_runtime_prefix(Manager *m);
368 ManagerState manager_state(Manager *m);
370 const char *manager_state_to_string(ManagerState m) _const_;
371 ManagerState manager_state_from_string(const char *s) _pure_;