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"
63 /* Note that the set of units we know of is allowed to be
64 * inconsistent. However the subset of it that is loaded may
65 * not, and the list of jobs may neither. */
67 /* Active jobs and units */
68 Hashmap *units; /* name string => Unit object n:1 */
69 Hashmap *jobs; /* job id => Job object 1:1 */
71 /* To make it easy to iterate through the units of a specific
72 * type we maintain a per type linked list */
73 LIST_HEAD(Unit, units_by_type[_UNIT_TYPE_MAX]);
75 /* Units that need to be loaded */
76 LIST_HEAD(Unit, load_queue); /* this is actually more a stack than a queue, but uh. */
78 /* Jobs that need to be run */
79 LIST_HEAD(Job, run_queue); /* more a stack than a queue, too */
81 /* Units and jobs that have not yet been announced via
82 * D-Bus. When something about a job changes it is added here
83 * if it is not in there yet. This allows easy coalescing of
84 * D-Bus change signals. */
85 LIST_HEAD(Unit, dbus_unit_queue);
86 LIST_HEAD(Job, dbus_job_queue);
89 LIST_HEAD(Unit, cleanup_queue);
91 /* Units to check when doing GC */
92 LIST_HEAD(Unit, gc_queue);
94 /* Units that should be realized */
95 LIST_HEAD(Unit, cgroup_queue);
99 /* We use two hash tables here, since the same PID might be
100 * watched by two different units: once the unit that forked
101 * it off, and possibly a different unit to which it was
102 * joined as cgroup member. Since we know that it is either
103 * one or two units for each PID we just use to hashmaps
105 Hashmap *watch_pids1; /* pid => Unit object n:1 */
106 Hashmap *watch_pids2; /* pid => Unit object n:1 */
108 sd_event_source *run_queue_event_source;
112 sd_event_source *notify_event_source;
115 sd_event_source *signal_event_source;
118 sd_event_source *time_change_event_source;
120 sd_event_source *jobs_in_progress_event_source;
122 unsigned n_snapshots;
124 LookupPaths lookup_paths;
125 Set *unit_path_cache;
129 usec_t runtime_watchdog;
130 usec_t shutdown_watchdog;
132 dual_timestamp firmware_timestamp;
133 dual_timestamp loader_timestamp;
134 dual_timestamp kernel_timestamp;
135 dual_timestamp initrd_timestamp;
136 dual_timestamp userspace_timestamp;
137 dual_timestamp finish_timestamp;
138 dual_timestamp security_start_timestamp;
139 dual_timestamp security_finish_timestamp;
140 dual_timestamp generators_start_timestamp;
141 dual_timestamp generators_finish_timestamp;
142 dual_timestamp units_load_start_timestamp;
143 dual_timestamp units_load_finish_timestamp;
145 char *generator_unit_path;
146 char *generator_unit_path_early;
147 char *generator_unit_path_late;
151 /* Data specific to the device subsystem */
152 struct udev_monitor* udev_monitor;
153 sd_event_source *udev_event_source;
154 Hashmap *devices_by_sysfs;
156 /* Data specific to the mount subsystem */
157 FILE *proc_self_mountinfo;
158 sd_event_source *mount_event_source;
160 /* Data specific to the swap filesystem */
162 sd_event_source *swap_event_source;
163 Hashmap *swaps_by_devnode;
165 /* Data specific to the D-Bus subsystem */
166 sd_bus *api_bus, *system_bus;
168 int private_listen_fd;
169 sd_event_source *private_listen_event_source;
171 /* Contains all the clients that are subscribed to signals via
172 the API bus. Note that private bus connections are always
173 considered subscribes, since they last for very short only,
174 and it is much simpler that way. */
175 sd_bus_track *subscribed;
176 char **deserialized_subscribed;
178 sd_bus_message *queued_message; /* This is used during reloading:
179 * before the reload we queue the
180 * reply message here, and
181 * afterwards we send it */
182 sd_bus *queued_message_bus; /* The connection to send the queued message on */
184 Hashmap *watch_bus; /* D-Bus names => Unit object n:1 */
186 bool send_reloading_done;
188 uint32_t current_job_id;
189 uint32_t default_unit_job_id;
191 /* Data specific to the Automount subsystem */
194 /* Data specific to the cgroup subsystem */
195 Hashmap *cgroup_unit;
196 CGroupControllerMask cgroup_supported;
200 unsigned n_in_gc_queue;
202 /* Make sure the user cannot accidentally unmount our cgroup
207 SystemdRunningAs running_as;
208 ManagerExitCode exit_code:5;
210 bool dispatching_load_queue:1;
211 bool dispatching_dbus_queue:1;
215 ShowStatus show_status;
217 bool no_console_output;
219 ExecOutput default_std_output, default_std_error;
221 usec_t default_restart_usec, default_timeout_start_usec, default_timeout_stop_usec;
223 usec_t default_start_limit_interval;
224 unsigned default_start_limit_burst;
226 bool default_cpu_accounting;
227 bool default_memory_accounting;
228 bool default_blockio_accounting;
230 struct rlimit *rlimit[RLIMIT_NLIMITS];
232 /* non-zero if we are reloading or reexecuting, */
235 unsigned n_installed_jobs;
236 unsigned n_failed_jobs;
238 /* Jobs in progress watching */
239 unsigned n_running_jobs;
240 unsigned n_on_console;
241 unsigned jobs_in_progress_iteration;
243 /* Type=idle pipes */
245 sd_event_source *idle_pipe_event_source;
248 char *switch_root_init;
250 /* This maps all possible path prefixes to the units needing
251 * them. It's a hashmap with a path string as key and a Set as
252 * value where Unit objects are contained. */
253 Hashmap *units_requiring_mounts_for;
255 /* Reference to the kdbus bus control fd */
259 int manager_new(SystemdRunningAs running_as, Manager **m);
260 void manager_free(Manager *m);
262 int manager_enumerate(Manager *m);
263 int manager_startup(Manager *m, FILE *serialization, FDSet *fds);
265 Job *manager_get_job(Manager *m, uint32_t id);
266 Unit *manager_get_unit(Manager *m, const char *name);
268 int manager_get_unit_by_path(Manager *m, const char *path, const char *suffix, Unit **_found);
270 int manager_get_job_from_dbus_path(Manager *m, const char *s, Job **_j);
272 int manager_load_unit_prepare(Manager *m, const char *name, const char *path, sd_bus_error *e, Unit **_ret);
273 int manager_load_unit(Manager *m, const char *name, const char *path, sd_bus_error *e, Unit **_ret);
274 int manager_load_unit_from_dbus_path(Manager *m, const char *s, sd_bus_error *e, Unit **_u);
276 int manager_add_job(Manager *m, JobType type, Unit *unit, JobMode mode, bool force, sd_bus_error *e, Job **_ret);
277 int manager_add_job_by_name(Manager *m, JobType type, const char *name, JobMode mode, bool force, sd_bus_error *e, Job **_ret);
279 void manager_dump_units(Manager *s, FILE *f, const char *prefix);
280 void manager_dump_jobs(Manager *s, FILE *f, const char *prefix);
282 void manager_clear_jobs(Manager *m);
284 unsigned manager_dispatch_load_queue(Manager *m);
286 int manager_environment_add(Manager *m, char **minus, char **plus);
287 int manager_set_default_rlimits(Manager *m, struct rlimit **default_rlimit);
289 int manager_loop(Manager *m);
291 void manager_dispatch_bus_name_owner_changed(Manager *m, const char *name, const char* old_owner, const char *new_owner);
293 int manager_open_serialization(Manager *m, FILE **_f);
295 int manager_serialize(Manager *m, FILE *f, FDSet *fds, bool switching_root);
296 int manager_deserialize(Manager *m, FILE *f, FDSet *fds);
298 int manager_reload(Manager *m);
300 bool manager_is_reloading_or_reexecuting(Manager *m) _pure_;
302 void manager_reset_failed(Manager *m);
304 void manager_send_unit_audit(Manager *m, Unit *u, int type, bool success);
305 void manager_send_unit_plymouth(Manager *m, Unit *u);
307 bool manager_unit_inactive_or_pending(Manager *m, const char *name);
309 void manager_check_finished(Manager *m);
311 void manager_run_generators(Manager *m);
312 void manager_undo_generators(Manager *m);
314 void manager_recheck_journal(Manager *m);
316 void manager_set_show_status(Manager *m, ShowStatus mode);
317 void manager_status_printf(Manager *m, bool ephemeral, const char *status, const char *format, ...) _printf_(4,5);
318 void manager_flip_auto_status(Manager *m, bool enable);
320 Set *manager_get_units_requiring_mounts_for(Manager *m, const char *path);