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 #define DEFAULT_MANAGER_START_TIMEOUT_USEC (15*USEC_PER_MINUTE)
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
70 #include "path-lookup.h"
72 #include "unit-name.h"
73 #include "exit-status.h"
74 #include "show-status.h"
75 #include "failure-action.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;
136 sd_event_source *signal_event_source;
139 sd_event_source *time_change_event_source;
141 sd_event_source *jobs_in_progress_event_source;
143 unsigned n_snapshots;
145 LookupPaths lookup_paths;
146 Set *unit_path_cache;
150 usec_t runtime_watchdog;
151 usec_t shutdown_watchdog;
153 dual_timestamp firmware_timestamp;
154 dual_timestamp loader_timestamp;
155 dual_timestamp kernel_timestamp;
156 dual_timestamp initrd_timestamp;
157 dual_timestamp userspace_timestamp;
158 dual_timestamp finish_timestamp;
160 dual_timestamp security_start_timestamp;
161 dual_timestamp security_finish_timestamp;
162 dual_timestamp generators_start_timestamp;
163 dual_timestamp generators_finish_timestamp;
164 dual_timestamp units_load_start_timestamp;
165 dual_timestamp units_load_finish_timestamp;
167 char *generator_unit_path;
168 char *generator_unit_path_early;
169 char *generator_unit_path_late;
173 /* Data specific to the device subsystem */
174 struct udev_monitor* udev_monitor;
175 sd_event_source *udev_event_source;
176 Hashmap *devices_by_sysfs;
178 /* Data specific to the mount subsystem */
179 FILE *proc_self_mountinfo;
180 sd_event_source *mount_event_source;
182 /* Data specific to the swap filesystem */
184 sd_event_source *swap_event_source;
185 Hashmap *swaps_by_devnode;
187 /* Data specific to the D-Bus subsystem */
188 sd_bus *api_bus, *system_bus;
190 int private_listen_fd;
191 sd_event_source *private_listen_event_source;
193 /* Contains all the clients that are subscribed to signals via
194 the API bus. Note that private bus connections are always
195 considered subscribes, since they last for very short only,
196 and it is much simpler that way. */
197 sd_bus_track *subscribed;
198 char **deserialized_subscribed;
200 sd_bus_message *queued_message; /* This is used during reloading:
201 * before the reload we queue the
202 * reply message here, and
203 * afterwards we send it */
204 sd_bus *queued_message_bus; /* The connection to send the queued message on */
206 Hashmap *watch_bus; /* D-Bus names => Unit object n:1 */
208 bool send_reloading_done;
210 uint32_t current_job_id;
211 uint32_t default_unit_job_id;
213 /* Data specific to the Automount subsystem */
216 /* Data specific to the cgroup subsystem */
217 Hashmap *cgroup_unit;
218 CGroupControllerMask cgroup_supported;
222 unsigned n_in_gc_queue;
224 /* Make sure the user cannot accidentally unmount our cgroup
229 SystemdRunningAs running_as;
230 ManagerExitCode exit_code:5;
232 bool dispatching_load_queue:1;
233 bool dispatching_dbus_queue:1;
240 ShowStatus show_status;
242 bool no_console_output;
244 ExecOutput default_std_output, default_std_error;
246 usec_t default_restart_usec, default_timeout_start_usec, default_timeout_stop_usec;
248 usec_t default_start_limit_interval;
249 unsigned default_start_limit_burst;
251 bool default_cpu_accounting;
252 bool default_memory_accounting;
253 bool default_blockio_accounting;
255 usec_t default_timer_accuracy_usec;
257 struct rlimit *rlimit[_RLIMIT_MAX];
259 /* non-zero if we are reloading or reexecuting, */
262 unsigned n_installed_jobs;
263 unsigned n_failed_jobs;
265 /* Jobs in progress watching */
266 unsigned n_running_jobs;
267 unsigned n_on_console;
268 unsigned jobs_in_progress_iteration;
270 /* Type=idle pipes */
272 sd_event_source *idle_pipe_event_source;
275 char *switch_root_init;
277 /* This maps all possible path prefixes to the units needing
278 * them. It's a hashmap with a path string as key and a Set as
279 * value where Unit objects are contained. */
280 Hashmap *units_requiring_mounts_for;
282 /* Reference to the kdbus bus control fd */
285 /* Used for processing polkit authorization responses */
286 Hashmap *polkit_registry;
288 /* System wide startup timeouts */
289 usec_t start_timeout_usec;
290 sd_event_source *start_timeout_event_source;
291 FailureAction start_timeout_action;
292 char *start_timeout_reboot_arg;
295 int manager_new(SystemdRunningAs running_as, bool test_run, Manager **m);
296 void manager_free(Manager *m);
298 int manager_enumerate(Manager *m);
299 int manager_startup(Manager *m, FILE *serialization, FDSet *fds);
301 Job *manager_get_job(Manager *m, uint32_t id);
302 Unit *manager_get_unit(Manager *m, const char *name);
304 int manager_get_unit_by_path(Manager *m, const char *path, const char *suffix, Unit **_found);
306 int manager_get_job_from_dbus_path(Manager *m, const char *s, Job **_j);
308 int manager_load_unit_prepare(Manager *m, const char *name, const char *path, sd_bus_error *e, Unit **_ret);
309 int manager_load_unit(Manager *m, const char *name, const char *path, sd_bus_error *e, Unit **_ret);
310 int manager_load_unit_from_dbus_path(Manager *m, const char *s, sd_bus_error *e, Unit **_u);
312 int manager_add_job(Manager *m, JobType type, Unit *unit, JobMode mode, bool force, sd_bus_error *e, Job **_ret);
313 int manager_add_job_by_name(Manager *m, JobType type, const char *name, JobMode mode, bool force, sd_bus_error *e, Job **_ret);
315 void manager_dump_units(Manager *s, FILE *f, const char *prefix);
316 void manager_dump_jobs(Manager *s, FILE *f, const char *prefix);
318 void manager_clear_jobs(Manager *m);
320 unsigned manager_dispatch_load_queue(Manager *m);
322 int manager_environment_add(Manager *m, char **minus, char **plus);
323 int manager_set_default_rlimits(Manager *m, struct rlimit **default_rlimit);
325 int manager_loop(Manager *m);
327 void manager_dispatch_bus_name_owner_changed(Manager *m, const char *name, const char* old_owner, const char *new_owner);
329 int manager_open_serialization(Manager *m, FILE **_f);
331 int manager_serialize(Manager *m, FILE *f, FDSet *fds, bool switching_root);
332 int manager_deserialize(Manager *m, FILE *f, FDSet *fds);
334 int manager_reload(Manager *m);
336 bool manager_is_reloading_or_reexecuting(Manager *m) _pure_;
338 void manager_reset_failed(Manager *m);
340 void manager_send_unit_audit(Manager *m, Unit *u, int type, bool success);
341 void manager_send_unit_plymouth(Manager *m, Unit *u);
343 bool manager_unit_inactive_or_pending(Manager *m, const char *name);
345 void manager_check_finished(Manager *m);
347 void manager_run_generators(Manager *m);
348 void manager_undo_generators(Manager *m);
350 void manager_recheck_journal(Manager *m);
352 void manager_set_show_status(Manager *m, ShowStatus mode);
353 void manager_set_first_boot(Manager *m, bool b);
355 void manager_status_printf(Manager *m, bool ephemeral, const char *status, const char *format, ...) _printf_(4,5);
356 void manager_flip_auto_status(Manager *m, bool enable);
358 Set *manager_get_units_requiring_mounts_for(Manager *m, const char *path);
360 const char *manager_get_runtime_prefix(Manager *m);
362 ManagerState manager_state(Manager *m);
364 const char *manager_state_to_string(ManagerState m) _const_;
365 ManagerState manager_state_from_string(const char *s) _pure_;