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 {
45 _MANAGER_STATE_INVALID = -1
48 typedef enum ManagerExitCode {
58 _MANAGER_EXIT_CODE_MAX,
59 _MANAGER_EXIT_CODE_INVALID = -1
67 #include "path-lookup.h"
69 #include "unit-name.h"
70 #include "exit-status.h"
71 #include "show-status.h"
74 /* Note that the set of units we know of is allowed to be
75 * inconsistent. However the subset of it that is loaded may
76 * not, and the list of jobs may neither. */
78 /* Active jobs and units */
79 Hashmap *units; /* name string => Unit object n:1 */
80 Hashmap *jobs; /* job id => Job object 1:1 */
82 /* To make it easy to iterate through the units of a specific
83 * type we maintain a per type linked list */
84 LIST_HEAD(Unit, units_by_type[_UNIT_TYPE_MAX]);
86 /* Units that need to be loaded */
87 LIST_HEAD(Unit, load_queue); /* this is actually more a stack than a queue, but uh. */
89 /* Jobs that need to be run */
90 LIST_HEAD(Job, run_queue); /* more a stack than a queue, too */
92 /* Units and jobs that have not yet been announced via
93 * D-Bus. When something about a job changes it is added here
94 * if it is not in there yet. This allows easy coalescing of
95 * D-Bus change signals. */
96 LIST_HEAD(Unit, dbus_unit_queue);
97 LIST_HEAD(Job, dbus_job_queue);
100 LIST_HEAD(Unit, cleanup_queue);
102 /* Units to check when doing GC */
103 LIST_HEAD(Unit, gc_queue);
105 /* Units that should be realized */
106 LIST_HEAD(Unit, cgroup_queue);
110 /* We use two hash tables here, since the same PID might be
111 * watched by two different units: once the unit that forked
112 * it off, and possibly a different unit to which it was
113 * joined as cgroup member. Since we know that it is either
114 * one or two units for each PID we just use to hashmaps
116 Hashmap *watch_pids1; /* pid => Unit object n:1 */
117 Hashmap *watch_pids2; /* pid => Unit object n:1 */
119 /* A set contains all units which cgroup should be refreshed after startup */
122 /* A set which contains all currently failed units */
125 sd_event_source *run_queue_event_source;
129 sd_event_source *notify_event_source;
132 sd_event_source *signal_event_source;
135 sd_event_source *time_change_event_source;
137 sd_event_source *jobs_in_progress_event_source;
139 unsigned n_snapshots;
141 LookupPaths lookup_paths;
142 Set *unit_path_cache;
146 usec_t runtime_watchdog;
147 usec_t shutdown_watchdog;
149 dual_timestamp firmware_timestamp;
150 dual_timestamp loader_timestamp;
151 dual_timestamp kernel_timestamp;
152 dual_timestamp initrd_timestamp;
153 dual_timestamp userspace_timestamp;
154 dual_timestamp finish_timestamp;
155 dual_timestamp security_start_timestamp;
156 dual_timestamp security_finish_timestamp;
157 dual_timestamp generators_start_timestamp;
158 dual_timestamp generators_finish_timestamp;
159 dual_timestamp units_load_start_timestamp;
160 dual_timestamp units_load_finish_timestamp;
162 char *generator_unit_path;
163 char *generator_unit_path_early;
164 char *generator_unit_path_late;
168 /* Data specific to the device subsystem */
169 struct udev_monitor* udev_monitor;
170 sd_event_source *udev_event_source;
171 Hashmap *devices_by_sysfs;
173 /* Data specific to the mount subsystem */
174 FILE *proc_self_mountinfo;
175 sd_event_source *mount_event_source;
177 /* Data specific to the swap filesystem */
179 sd_event_source *swap_event_source;
180 Hashmap *swaps_by_devnode;
182 /* Data specific to the D-Bus subsystem */
183 sd_bus *api_bus, *system_bus;
185 int private_listen_fd;
186 sd_event_source *private_listen_event_source;
188 /* Contains all the clients that are subscribed to signals via
189 the API bus. Note that private bus connections are always
190 considered subscribes, since they last for very short only,
191 and it is much simpler that way. */
192 sd_bus_track *subscribed;
193 char **deserialized_subscribed;
195 sd_bus_message *queued_message; /* This is used during reloading:
196 * before the reload we queue the
197 * reply message here, and
198 * afterwards we send it */
199 sd_bus *queued_message_bus; /* The connection to send the queued message on */
201 Hashmap *watch_bus; /* D-Bus names => Unit object n:1 */
203 bool send_reloading_done;
205 uint32_t current_job_id;
206 uint32_t default_unit_job_id;
208 /* Data specific to the Automount subsystem */
211 /* Data specific to the cgroup subsystem */
212 Hashmap *cgroup_unit;
213 CGroupControllerMask cgroup_supported;
217 unsigned n_in_gc_queue;
219 /* Make sure the user cannot accidentally unmount our cgroup
224 SystemdRunningAs running_as;
225 ManagerExitCode exit_code:5;
227 bool dispatching_load_queue:1;
228 bool dispatching_dbus_queue:1;
235 ShowStatus show_status;
237 bool no_console_output;
239 ExecOutput default_std_output, default_std_error;
241 usec_t default_restart_usec, default_timeout_start_usec, default_timeout_stop_usec;
243 usec_t default_start_limit_interval;
244 unsigned default_start_limit_burst;
246 bool default_cpu_accounting;
247 bool default_memory_accounting;
248 bool default_blockio_accounting;
250 usec_t default_timer_accuracy_usec;
252 struct rlimit *rlimit[_RLIMIT_MAX];
254 /* non-zero if we are reloading or reexecuting, */
257 unsigned n_installed_jobs;
258 unsigned n_failed_jobs;
260 /* Jobs in progress watching */
261 unsigned n_running_jobs;
262 unsigned n_on_console;
263 unsigned jobs_in_progress_iteration;
265 /* Type=idle pipes */
267 sd_event_source *idle_pipe_event_source;
270 char *switch_root_init;
272 /* This maps all possible path prefixes to the units needing
273 * them. It's a hashmap with a path string as key and a Set as
274 * value where Unit objects are contained. */
275 Hashmap *units_requiring_mounts_for;
277 /* Reference to the kdbus bus control fd */
281 int manager_new(SystemdRunningAs running_as, bool test_run, Manager **m);
282 void manager_free(Manager *m);
284 int manager_enumerate(Manager *m);
285 int manager_startup(Manager *m, FILE *serialization, FDSet *fds);
287 Job *manager_get_job(Manager *m, uint32_t id);
288 Unit *manager_get_unit(Manager *m, const char *name);
290 int manager_get_unit_by_path(Manager *m, const char *path, const char *suffix, Unit **_found);
292 int manager_get_job_from_dbus_path(Manager *m, const char *s, Job **_j);
294 int manager_load_unit_prepare(Manager *m, const char *name, const char *path, sd_bus_error *e, Unit **_ret);
295 int manager_load_unit(Manager *m, const char *name, const char *path, sd_bus_error *e, Unit **_ret);
296 int manager_load_unit_from_dbus_path(Manager *m, const char *s, sd_bus_error *e, Unit **_u);
298 int manager_add_job(Manager *m, JobType type, Unit *unit, JobMode mode, bool force, sd_bus_error *e, Job **_ret);
299 int manager_add_job_by_name(Manager *m, JobType type, const char *name, JobMode mode, bool force, sd_bus_error *e, Job **_ret);
301 void manager_dump_units(Manager *s, FILE *f, const char *prefix);
302 void manager_dump_jobs(Manager *s, FILE *f, const char *prefix);
304 void manager_clear_jobs(Manager *m);
306 unsigned manager_dispatch_load_queue(Manager *m);
308 int manager_environment_add(Manager *m, char **minus, char **plus);
309 int manager_set_default_rlimits(Manager *m, struct rlimit **default_rlimit);
311 int manager_loop(Manager *m);
313 void manager_dispatch_bus_name_owner_changed(Manager *m, const char *name, const char* old_owner, const char *new_owner);
315 int manager_open_serialization(Manager *m, FILE **_f);
317 int manager_serialize(Manager *m, FILE *f, FDSet *fds, bool switching_root);
318 int manager_deserialize(Manager *m, FILE *f, FDSet *fds);
320 int manager_reload(Manager *m);
322 bool manager_is_reloading_or_reexecuting(Manager *m) _pure_;
324 void manager_reset_failed(Manager *m);
326 void manager_send_unit_audit(Manager *m, Unit *u, int type, bool success);
327 void manager_send_unit_plymouth(Manager *m, Unit *u);
329 bool manager_unit_inactive_or_pending(Manager *m, const char *name);
331 void manager_check_finished(Manager *m);
333 void manager_run_generators(Manager *m);
334 void manager_undo_generators(Manager *m);
336 void manager_recheck_journal(Manager *m);
338 void manager_set_show_status(Manager *m, ShowStatus mode);
339 void manager_set_first_boot(Manager *m, bool b);
341 void manager_status_printf(Manager *m, bool ephemeral, const char *status, const char *format, ...) _printf_(4,5);
342 void manager_flip_auto_status(Manager *m, bool enable);
344 Set *manager_get_units_requiring_mounts_for(Manager *m, const char *path);
346 const char *manager_get_runtime_prefix(Manager *m);
348 ManagerState manager_state(Manager *m);
350 const char *manager_state_to_string(ManagerState m) _const_;
351 ManagerState manager_state_from_string(const char *s) _pure_;