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 which contains all currently failed units */
122 sd_event_source *run_queue_event_source;
126 sd_event_source *notify_event_source;
129 sd_event_source *signal_event_source;
132 sd_event_source *time_change_event_source;
134 sd_event_source *jobs_in_progress_event_source;
136 unsigned n_snapshots;
138 LookupPaths lookup_paths;
139 Set *unit_path_cache;
143 usec_t runtime_watchdog;
144 usec_t shutdown_watchdog;
146 dual_timestamp firmware_timestamp;
147 dual_timestamp loader_timestamp;
148 dual_timestamp kernel_timestamp;
149 dual_timestamp initrd_timestamp;
150 dual_timestamp userspace_timestamp;
151 dual_timestamp finish_timestamp;
152 dual_timestamp security_start_timestamp;
153 dual_timestamp security_finish_timestamp;
154 dual_timestamp generators_start_timestamp;
155 dual_timestamp generators_finish_timestamp;
156 dual_timestamp units_load_start_timestamp;
157 dual_timestamp units_load_finish_timestamp;
159 char *generator_unit_path;
160 char *generator_unit_path_early;
161 char *generator_unit_path_late;
165 /* Data specific to the device subsystem */
166 struct udev_monitor* udev_monitor;
167 sd_event_source *udev_event_source;
168 Hashmap *devices_by_sysfs;
170 /* Data specific to the mount subsystem */
171 FILE *proc_self_mountinfo;
172 sd_event_source *mount_event_source;
174 /* Data specific to the swap filesystem */
176 sd_event_source *swap_event_source;
177 Hashmap *swaps_by_devnode;
179 /* Data specific to the D-Bus subsystem */
180 sd_bus *api_bus, *system_bus;
182 int private_listen_fd;
183 sd_event_source *private_listen_event_source;
185 /* Contains all the clients that are subscribed to signals via
186 the API bus. Note that private bus connections are always
187 considered subscribes, since they last for very short only,
188 and it is much simpler that way. */
189 sd_bus_track *subscribed;
190 char **deserialized_subscribed;
192 sd_bus_message *queued_message; /* This is used during reloading:
193 * before the reload we queue the
194 * reply message here, and
195 * afterwards we send it */
196 sd_bus *queued_message_bus; /* The connection to send the queued message on */
198 Hashmap *watch_bus; /* D-Bus names => Unit object n:1 */
200 bool send_reloading_done;
202 uint32_t current_job_id;
203 uint32_t default_unit_job_id;
205 /* Data specific to the Automount subsystem */
208 /* Data specific to the cgroup subsystem */
209 Hashmap *cgroup_unit;
210 CGroupControllerMask cgroup_supported;
214 unsigned n_in_gc_queue;
216 /* Make sure the user cannot accidentally unmount our cgroup
221 SystemdRunningAs running_as;
222 ManagerExitCode exit_code:5;
224 bool dispatching_load_queue:1;
225 bool dispatching_dbus_queue:1;
229 ShowStatus show_status;
231 bool no_console_output;
233 ExecOutput default_std_output, default_std_error;
235 usec_t default_restart_usec, default_timeout_start_usec, default_timeout_stop_usec;
237 usec_t default_start_limit_interval;
238 unsigned default_start_limit_burst;
240 bool default_cpu_accounting;
241 bool default_memory_accounting;
242 bool default_blockio_accounting;
244 struct rlimit *rlimit[_RLIMIT_MAX];
246 /* non-zero if we are reloading or reexecuting, */
249 unsigned n_installed_jobs;
250 unsigned n_failed_jobs;
252 /* Jobs in progress watching */
253 unsigned n_running_jobs;
254 unsigned n_on_console;
255 unsigned jobs_in_progress_iteration;
257 /* Type=idle pipes */
259 sd_event_source *idle_pipe_event_source;
262 char *switch_root_init;
264 /* This maps all possible path prefixes to the units needing
265 * them. It's a hashmap with a path string as key and a Set as
266 * value where Unit objects are contained. */
267 Hashmap *units_requiring_mounts_for;
269 /* Reference to the kdbus bus control fd */
273 int manager_new(SystemdRunningAs running_as, Manager **m);
274 void manager_free(Manager *m);
276 int manager_enumerate(Manager *m);
277 int manager_startup(Manager *m, FILE *serialization, FDSet *fds);
279 Job *manager_get_job(Manager *m, uint32_t id);
280 Unit *manager_get_unit(Manager *m, const char *name);
282 int manager_get_unit_by_path(Manager *m, const char *path, const char *suffix, Unit **_found);
284 int manager_get_job_from_dbus_path(Manager *m, const char *s, Job **_j);
286 int manager_load_unit_prepare(Manager *m, const char *name, const char *path, sd_bus_error *e, Unit **_ret);
287 int manager_load_unit(Manager *m, const char *name, const char *path, sd_bus_error *e, Unit **_ret);
288 int manager_load_unit_from_dbus_path(Manager *m, const char *s, sd_bus_error *e, Unit **_u);
290 int manager_add_job(Manager *m, JobType type, Unit *unit, JobMode mode, bool force, sd_bus_error *e, Job **_ret);
291 int manager_add_job_by_name(Manager *m, JobType type, const char *name, JobMode mode, bool force, sd_bus_error *e, Job **_ret);
293 void manager_dump_units(Manager *s, FILE *f, const char *prefix);
294 void manager_dump_jobs(Manager *s, FILE *f, const char *prefix);
296 void manager_clear_jobs(Manager *m);
298 unsigned manager_dispatch_load_queue(Manager *m);
300 int manager_environment_add(Manager *m, char **minus, char **plus);
301 int manager_set_default_rlimits(Manager *m, struct rlimit **default_rlimit);
303 int manager_loop(Manager *m);
305 void manager_dispatch_bus_name_owner_changed(Manager *m, const char *name, const char* old_owner, const char *new_owner);
307 int manager_open_serialization(Manager *m, FILE **_f);
309 int manager_serialize(Manager *m, FILE *f, FDSet *fds, bool switching_root);
310 int manager_deserialize(Manager *m, FILE *f, FDSet *fds);
312 int manager_reload(Manager *m);
314 bool manager_is_reloading_or_reexecuting(Manager *m) _pure_;
316 void manager_reset_failed(Manager *m);
318 void manager_send_unit_audit(Manager *m, Unit *u, int type, bool success);
319 void manager_send_unit_plymouth(Manager *m, Unit *u);
321 bool manager_unit_inactive_or_pending(Manager *m, const char *name);
323 void manager_check_finished(Manager *m);
325 void manager_run_generators(Manager *m);
326 void manager_undo_generators(Manager *m);
328 void manager_recheck_journal(Manager *m);
330 void manager_set_show_status(Manager *m, ShowStatus mode);
331 void manager_status_printf(Manager *m, bool ephemeral, const char *status, const char *format, ...) _printf_(4,5);
332 void manager_flip_auto_status(Manager *m, bool enable);
334 Set *manager_get_units_requiring_mounts_for(Manager *m, const char *path);
336 const char *manager_get_runtime_prefix(Manager *m);
338 ManagerState manager_state(Manager *m);
340 const char *manager_state_to_string(ManagerState m) _const_;
341 ManagerState manager_state_from_string(const char *s) _pure_;