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
68 #include "path-lookup.h"
70 #include "unit-name.h"
71 #include "exit-status.h"
72 #include "show-status.h"
73 #include "failure-action.h"
76 /* Note that the set of units we know of is allowed to be
77 * inconsistent. However the subset of it that is loaded may
78 * not, and the list of jobs may neither. */
80 /* Active jobs and units */
81 Hashmap *units; /* name string => Unit object n:1 */
82 Hashmap *jobs; /* job id => Job object 1:1 */
84 /* To make it easy to iterate through the units of a specific
85 * type we maintain a per type linked list */
86 LIST_HEAD(Unit, units_by_type[_UNIT_TYPE_MAX]);
88 /* Units that need to be loaded */
89 LIST_HEAD(Unit, load_queue); /* this is actually more a stack than a queue, but uh. */
91 /* Jobs that need to be run */
92 LIST_HEAD(Job, run_queue); /* more a stack than a queue, too */
94 /* Units and jobs that have not yet been announced via
95 * D-Bus. When something about a job changes it is added here
96 * if it is not in there yet. This allows easy coalescing of
97 * D-Bus change signals. */
98 LIST_HEAD(Unit, dbus_unit_queue);
99 LIST_HEAD(Job, dbus_job_queue);
101 /* Units to remove */
102 LIST_HEAD(Unit, cleanup_queue);
104 /* Units to check when doing GC */
105 LIST_HEAD(Unit, gc_queue);
107 /* Units that should be realized */
108 LIST_HEAD(Unit, cgroup_queue);
112 /* We use two hash tables here, since the same PID might be
113 * watched by two different units: once the unit that forked
114 * it off, and possibly a different unit to which it was
115 * joined as cgroup member. Since we know that it is either
116 * one or two units for each PID we just use to hashmaps
118 Hashmap *watch_pids1; /* pid => Unit object n:1 */
119 Hashmap *watch_pids2; /* pid => Unit object n:1 */
121 /* A set contains all units which cgroup should be refreshed after startup */
124 /* A set which contains all currently failed units */
127 sd_event_source *run_queue_event_source;
131 sd_event_source *notify_event_source;
134 sd_event_source *signal_event_source;
137 sd_event_source *time_change_event_source;
139 sd_event_source *jobs_in_progress_event_source;
141 unsigned n_snapshots;
143 LookupPaths lookup_paths;
144 Set *unit_path_cache;
148 usec_t runtime_watchdog;
149 usec_t shutdown_watchdog;
151 dual_timestamp firmware_timestamp;
152 dual_timestamp loader_timestamp;
153 dual_timestamp kernel_timestamp;
154 dual_timestamp initrd_timestamp;
155 dual_timestamp userspace_timestamp;
156 dual_timestamp finish_timestamp;
158 dual_timestamp security_start_timestamp;
159 dual_timestamp security_finish_timestamp;
160 dual_timestamp generators_start_timestamp;
161 dual_timestamp generators_finish_timestamp;
162 dual_timestamp units_load_start_timestamp;
163 dual_timestamp units_load_finish_timestamp;
165 char *generator_unit_path;
166 char *generator_unit_path_early;
167 char *generator_unit_path_late;
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 FILE *proc_self_mountinfo;
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 sd_bus_message *queued_message; /* This is used during reloading:
199 * before the reload we queue the
200 * reply message here, and
201 * afterwards we send it */
202 sd_bus *queued_message_bus; /* The connection to send the queued message on */
204 Hashmap *watch_bus; /* D-Bus names => Unit object n:1 */
206 bool send_reloading_done;
208 uint32_t current_job_id;
209 uint32_t default_unit_job_id;
211 /* Data specific to the Automount subsystem */
214 /* Data specific to the cgroup subsystem */
215 Hashmap *cgroup_unit;
216 CGroupControllerMask cgroup_supported;
220 unsigned n_in_gc_queue;
222 /* Make sure the user cannot accidentally unmount our cgroup
227 SystemdRunningAs running_as;
228 ManagerExitCode exit_code:5;
230 bool dispatching_load_queue:1;
231 bool dispatching_dbus_queue:1;
238 ShowStatus show_status;
240 bool no_console_output;
242 ExecOutput default_std_output, default_std_error;
244 usec_t default_restart_usec, default_timeout_start_usec, default_timeout_stop_usec;
246 usec_t default_start_limit_interval;
247 unsigned default_start_limit_burst;
249 bool default_cpu_accounting;
250 bool default_memory_accounting;
251 bool default_blockio_accounting;
253 usec_t default_timer_accuracy_usec;
255 struct rlimit *rlimit[_RLIMIT_MAX];
257 /* non-zero if we are reloading or reexecuting, */
260 unsigned n_installed_jobs;
261 unsigned n_failed_jobs;
263 /* Jobs in progress watching */
264 unsigned n_running_jobs;
265 unsigned n_on_console;
266 unsigned jobs_in_progress_iteration;
268 /* Type=idle pipes */
270 sd_event_source *idle_pipe_event_source;
273 char *switch_root_init;
275 /* This maps all possible path prefixes to the units needing
276 * them. It's a hashmap with a path string as key and a Set as
277 * value where Unit objects are contained. */
278 Hashmap *units_requiring_mounts_for;
280 /* Reference to the kdbus bus control fd */
283 /* Used for processing polkit authorization responses */
284 Hashmap *polkit_registry;
287 int manager_new(SystemdRunningAs running_as, bool test_run, Manager **m);
288 void manager_free(Manager *m);
290 int manager_enumerate(Manager *m);
291 int manager_startup(Manager *m, FILE *serialization, FDSet *fds);
293 Job *manager_get_job(Manager *m, uint32_t id);
294 Unit *manager_get_unit(Manager *m, const char *name);
296 int manager_get_unit_by_path(Manager *m, const char *path, const char *suffix, Unit **_found);
298 int manager_get_job_from_dbus_path(Manager *m, const char *s, Job **_j);
300 int manager_load_unit_prepare(Manager *m, const char *name, const char *path, sd_bus_error *e, Unit **_ret);
301 int manager_load_unit(Manager *m, const char *name, const char *path, sd_bus_error *e, Unit **_ret);
302 int manager_load_unit_from_dbus_path(Manager *m, const char *s, sd_bus_error *e, Unit **_u);
304 int manager_add_job(Manager *m, JobType type, Unit *unit, JobMode mode, bool force, sd_bus_error *e, Job **_ret);
305 int manager_add_job_by_name(Manager *m, JobType type, const char *name, JobMode mode, bool force, sd_bus_error *e, Job **_ret);
307 void manager_dump_units(Manager *s, FILE *f, const char *prefix);
308 void manager_dump_jobs(Manager *s, FILE *f, const char *prefix);
310 void manager_clear_jobs(Manager *m);
312 unsigned manager_dispatch_load_queue(Manager *m);
314 int manager_environment_add(Manager *m, char **minus, char **plus);
315 int manager_set_default_rlimits(Manager *m, struct rlimit **default_rlimit);
317 int manager_loop(Manager *m);
319 void manager_dispatch_bus_name_owner_changed(Manager *m, const char *name, const char* old_owner, const char *new_owner);
321 int manager_open_serialization(Manager *m, FILE **_f);
323 int manager_serialize(Manager *m, FILE *f, FDSet *fds, bool switching_root);
324 int manager_deserialize(Manager *m, FILE *f, FDSet *fds);
326 int manager_reload(Manager *m);
328 bool manager_is_reloading_or_reexecuting(Manager *m) _pure_;
330 void manager_reset_failed(Manager *m);
332 void manager_send_unit_audit(Manager *m, Unit *u, int type, bool success);
333 void manager_send_unit_plymouth(Manager *m, Unit *u);
335 bool manager_unit_inactive_or_pending(Manager *m, const char *name);
337 void manager_check_finished(Manager *m);
339 void manager_run_generators(Manager *m);
340 void manager_undo_generators(Manager *m);
342 void manager_recheck_journal(Manager *m);
344 void manager_set_show_status(Manager *m, ShowStatus mode);
345 void manager_set_first_boot(Manager *m, bool b);
347 void manager_status_printf(Manager *m, bool ephemeral, const char *status, const char *format, ...) _printf_(4,5);
348 void manager_flip_auto_status(Manager *m, bool enable);
350 Set *manager_get_units_requiring_mounts_for(Manager *m, const char *path);
352 const char *manager_get_runtime_prefix(Manager *m);
354 ManagerState manager_state(Manager *m);
356 const char *manager_state_to_string(ManagerState m) _const_;
357 ManagerState manager_state_from_string(const char *s) _pure_;