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 ManagerExitCode {
48 _MANAGER_EXIT_CODE_MAX,
49 _MANAGER_EXIT_CODE_INVALID = -1
57 #include "path-lookup.h"
59 #include "unit-name.h"
60 #include "exit-status.h"
61 #include "show-status.h"
64 /* Note that the set of units we know of is allowed to be
65 * inconsistent. However the subset of it that is loaded may
66 * not, and the list of jobs may neither. */
68 /* Active jobs and units */
69 Hashmap *units; /* name string => Unit object n:1 */
70 Hashmap *jobs; /* job id => Job object 1:1 */
72 /* To make it easy to iterate through the units of a specific
73 * type we maintain a per type linked list */
74 LIST_HEAD(Unit, units_by_type[_UNIT_TYPE_MAX]);
76 /* Units that need to be loaded */
77 LIST_HEAD(Unit, load_queue); /* this is actually more a stack than a queue, but uh. */
79 /* Jobs that need to be run */
80 LIST_HEAD(Job, run_queue); /* more a stack than a queue, too */
82 /* Units and jobs that have not yet been announced via
83 * D-Bus. When something about a job changes it is added here
84 * if it is not in there yet. This allows easy coalescing of
85 * D-Bus change signals. */
86 LIST_HEAD(Unit, dbus_unit_queue);
87 LIST_HEAD(Job, dbus_job_queue);
90 LIST_HEAD(Unit, cleanup_queue);
92 /* Units to check when doing GC */
93 LIST_HEAD(Unit, gc_queue);
95 /* Units that should be realized */
96 LIST_HEAD(Unit, cgroup_queue);
100 /* We use two hash tables here, since the same PID might be
101 * watched by two different units: once the unit that forked
102 * it off, and possibly a different unit to which it was
103 * joined as cgroup member. Since we know that it is either
104 * one or two units for each PID we just use to hashmaps
106 Hashmap *watch_pids1; /* pid => Unit object n:1 */
107 Hashmap *watch_pids2; /* pid => Unit object n:1 */
109 sd_event_source *run_queue_event_source;
113 sd_event_source *notify_event_source;
116 sd_event_source *signal_event_source;
119 sd_event_source *time_change_event_source;
121 sd_event_source *jobs_in_progress_event_source;
123 unsigned n_snapshots;
125 LookupPaths lookup_paths;
126 Set *unit_path_cache;
130 usec_t runtime_watchdog;
131 usec_t shutdown_watchdog;
133 dual_timestamp firmware_timestamp;
134 dual_timestamp loader_timestamp;
135 dual_timestamp kernel_timestamp;
136 dual_timestamp initrd_timestamp;
137 dual_timestamp userspace_timestamp;
138 dual_timestamp finish_timestamp;
139 dual_timestamp security_start_timestamp;
140 dual_timestamp security_finish_timestamp;
141 dual_timestamp generators_start_timestamp;
142 dual_timestamp generators_finish_timestamp;
143 dual_timestamp units_load_start_timestamp;
144 dual_timestamp units_load_finish_timestamp;
146 char *generator_unit_path;
147 char *generator_unit_path_early;
148 char *generator_unit_path_late;
152 /* Data specific to the device subsystem */
153 struct udev_monitor* udev_monitor;
154 sd_event_source *udev_event_source;
155 Hashmap *devices_by_sysfs;
157 /* Data specific to the mount subsystem */
158 FILE *proc_self_mountinfo;
159 sd_event_source *mount_event_source;
161 /* Data specific to the swap filesystem */
163 sd_event_source *swap_event_source;
164 Hashmap *swaps_by_devnode;
166 /* Data specific to the D-Bus subsystem */
167 sd_bus *api_bus, *system_bus;
169 int private_listen_fd;
170 sd_event_source *private_listen_event_source;
172 /* Contains all the clients that are subscribed to signals via
173 the API bus. Note that private bus connections are always
174 considered subscribes, since they last for very short only,
175 and it is much simpler that way. */
176 sd_bus_track *subscribed;
177 char **deserialized_subscribed;
179 sd_bus_message *queued_message; /* This is used during reloading:
180 * before the reload we queue the
181 * reply message here, and
182 * afterwards we send it */
183 sd_bus *queued_message_bus; /* The connection to send the queued message on */
185 Hashmap *watch_bus; /* D-Bus names => Unit object n:1 */
187 bool send_reloading_done;
189 uint32_t current_job_id;
190 uint32_t default_unit_job_id;
192 /* Data specific to the Automount subsystem */
195 /* Data specific to the cgroup subsystem */
196 Hashmap *cgroup_unit;
197 CGroupControllerMask cgroup_supported;
201 unsigned n_in_gc_queue;
203 /* Make sure the user cannot accidentally unmount our cgroup
208 SystemdRunningAs running_as;
209 ManagerExitCode exit_code:5;
211 bool dispatching_load_queue:1;
212 bool dispatching_dbus_queue:1;
216 ShowStatus show_status;
218 bool no_console_output;
220 ExecOutput default_std_output, default_std_error;
222 usec_t default_restart_usec, default_timeout_start_usec, default_timeout_stop_usec;
224 usec_t default_start_limit_interval;
225 unsigned default_start_limit_burst;
227 bool default_cpu_accounting;
228 bool default_memory_accounting;
229 bool default_blockio_accounting;
231 struct rlimit *rlimit[_RLIMIT_MAX];
233 /* non-zero if we are reloading or reexecuting, */
236 unsigned n_installed_jobs;
237 unsigned n_failed_jobs;
239 /* Jobs in progress watching */
240 unsigned n_running_jobs;
241 unsigned n_on_console;
242 unsigned jobs_in_progress_iteration;
244 /* Type=idle pipes */
246 sd_event_source *idle_pipe_event_source;
249 char *switch_root_init;
251 /* This maps all possible path prefixes to the units needing
252 * them. It's a hashmap with a path string as key and a Set as
253 * value where Unit objects are contained. */
254 Hashmap *units_requiring_mounts_for;
256 /* Reference to the kdbus bus control fd */
260 int manager_new(SystemdRunningAs running_as, Manager **m);
261 void manager_free(Manager *m);
263 int manager_enumerate(Manager *m);
264 int manager_startup(Manager *m, FILE *serialization, FDSet *fds);
266 Job *manager_get_job(Manager *m, uint32_t id);
267 Unit *manager_get_unit(Manager *m, const char *name);
269 int manager_get_unit_by_path(Manager *m, const char *path, const char *suffix, Unit **_found);
271 int manager_get_job_from_dbus_path(Manager *m, const char *s, Job **_j);
273 int manager_load_unit_prepare(Manager *m, const char *name, const char *path, sd_bus_error *e, Unit **_ret);
274 int manager_load_unit(Manager *m, const char *name, const char *path, sd_bus_error *e, Unit **_ret);
275 int manager_load_unit_from_dbus_path(Manager *m, const char *s, sd_bus_error *e, Unit **_u);
277 int manager_add_job(Manager *m, JobType type, Unit *unit, JobMode mode, bool force, sd_bus_error *e, Job **_ret);
278 int manager_add_job_by_name(Manager *m, JobType type, const char *name, JobMode mode, bool force, sd_bus_error *e, Job **_ret);
280 void manager_dump_units(Manager *s, FILE *f, const char *prefix);
281 void manager_dump_jobs(Manager *s, FILE *f, const char *prefix);
283 void manager_clear_jobs(Manager *m);
285 unsigned manager_dispatch_load_queue(Manager *m);
287 int manager_environment_add(Manager *m, char **minus, char **plus);
288 int manager_set_default_rlimits(Manager *m, struct rlimit **default_rlimit);
290 int manager_loop(Manager *m);
292 void manager_dispatch_bus_name_owner_changed(Manager *m, const char *name, const char* old_owner, const char *new_owner);
294 int manager_open_serialization(Manager *m, FILE **_f);
296 int manager_serialize(Manager *m, FILE *f, FDSet *fds, bool switching_root);
297 int manager_deserialize(Manager *m, FILE *f, FDSet *fds);
299 int manager_reload(Manager *m);
301 bool manager_is_reloading_or_reexecuting(Manager *m) _pure_;
303 void manager_reset_failed(Manager *m);
305 void manager_send_unit_audit(Manager *m, Unit *u, int type, bool success);
306 void manager_send_unit_plymouth(Manager *m, Unit *u);
308 bool manager_unit_inactive_or_pending(Manager *m, const char *name);
310 void manager_check_finished(Manager *m);
312 void manager_run_generators(Manager *m);
313 void manager_undo_generators(Manager *m);
315 void manager_recheck_journal(Manager *m);
317 void manager_set_show_status(Manager *m, ShowStatus mode);
318 void manager_status_printf(Manager *m, bool ephemeral, const char *status, const char *format, ...) _printf_(4,5);
319 void manager_flip_auto_status(Manager *m, bool enable);
321 Set *manager_get_units_requiring_mounts_for(Manager *m, const char *path);
323 const char *manager_get_runtime_prefix(Manager *m);