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"
62 /* Note that the set of units we know of is allowed to be
63 * inconsistent. However the subset of it that is loaded may
64 * not, and the list of jobs may neither. */
66 /* Active jobs and units */
67 Hashmap *units; /* name string => Unit object n:1 */
68 Hashmap *jobs; /* job id => Job object 1:1 */
70 /* To make it easy to iterate through the units of a specific
71 * type we maintain a per type linked list */
72 LIST_HEAD(Unit, units_by_type[_UNIT_TYPE_MAX]);
74 /* Units that need to be loaded */
75 LIST_HEAD(Unit, load_queue); /* this is actually more a stack than a queue, but uh. */
77 /* Jobs that need to be run */
78 LIST_HEAD(Job, run_queue); /* more a stack than a queue, too */
80 /* Units and jobs that have not yet been announced via
81 * D-Bus. When something about a job changes it is added here
82 * if it is not in there yet. This allows easy coalescing of
83 * D-Bus change signals. */
84 LIST_HEAD(Unit, dbus_unit_queue);
85 LIST_HEAD(Job, dbus_job_queue);
88 LIST_HEAD(Unit, cleanup_queue);
90 /* Units to check when doing GC */
91 LIST_HEAD(Unit, gc_queue);
93 /* Units that should be realized */
94 LIST_HEAD(Unit, cgroup_queue);
98 Hashmap *watch_pids; /* pid => Unit object n:1 */
100 sd_event_source *run_queue_event_source;
104 sd_event_source *notify_event_source;
107 sd_event_source *signal_event_source;
110 sd_event_source *time_change_event_source;
112 sd_event_source *jobs_in_progress_event_source;
114 unsigned n_snapshots;
116 LookupPaths lookup_paths;
117 Set *unit_path_cache;
121 usec_t runtime_watchdog;
122 usec_t shutdown_watchdog;
124 dual_timestamp firmware_timestamp;
125 dual_timestamp loader_timestamp;
126 dual_timestamp kernel_timestamp;
127 dual_timestamp initrd_timestamp;
128 dual_timestamp userspace_timestamp;
129 dual_timestamp finish_timestamp;
130 dual_timestamp security_start_timestamp;
131 dual_timestamp security_finish_timestamp;
132 dual_timestamp generators_start_timestamp;
133 dual_timestamp generators_finish_timestamp;
134 dual_timestamp units_load_start_timestamp;
135 dual_timestamp units_load_finish_timestamp;
137 char *generator_unit_path;
138 char *generator_unit_path_early;
139 char *generator_unit_path_late;
143 /* Data specific to the device subsystem */
144 struct udev_monitor* udev_monitor;
145 sd_event_source *udev_event_source;
146 Hashmap *devices_by_sysfs;
148 /* Data specific to the mount subsystem */
149 FILE *proc_self_mountinfo;
150 sd_event_source *mount_event_source;
152 /* Data specific to the swap filesystem */
154 sd_event_source *swap_event_source;
155 Hashmap *swaps_by_devnode;
157 /* Data specific to the D-Bus subsystem */
158 sd_bus *api_bus, *system_bus;
160 int private_listen_fd;
161 sd_event_source *private_listen_event_source;
164 sd_bus_message *queued_message; /* This is used during reloading:
165 * before the reload we queue the
166 * reply message here, and
167 * afterwards we send it */
168 sd_bus *queued_message_bus; /* The connection to send the queued message on */
170 Hashmap *watch_bus; /* D-Bus names => Unit object n:1 */
172 bool send_reloading_done;
174 uint32_t current_job_id;
175 uint32_t default_unit_job_id;
177 /* Data specific to the Automount subsystem */
180 /* Data specific to the cgroup subsystem */
181 Hashmap *cgroup_unit;
182 CGroupControllerMask cgroup_supported;
186 unsigned n_in_gc_queue;
188 /* Make sure the user cannot accidentally unmount our cgroup
193 SystemdRunningAs running_as;
194 ManagerExitCode exit_code:5;
196 bool dispatching_load_queue:1;
197 bool dispatching_dbus_queue:1;
203 bool no_console_output;
205 ExecOutput default_std_output, default_std_error;
207 usec_t default_restart_usec, default_timeout_start_usec,
208 default_timeout_stop_usec;
210 usec_t default_start_limit_interval;
211 unsigned default_start_limit_burst;
213 struct rlimit *rlimit[RLIMIT_NLIMITS];
215 /* non-zero if we are reloading or reexecuting, */
218 unsigned n_installed_jobs;
219 unsigned n_failed_jobs;
221 /* Jobs in progress watching */
222 unsigned n_running_jobs;
223 unsigned n_on_console;
224 unsigned jobs_in_progress_iteration;
226 /* Type=idle pipes */
228 sd_event_source *idle_pipe_event_source;
231 char *switch_root_init;
233 /* This maps all possible path prefixes to the units needing
234 * them. It's a hashmap with a path string as key and a Set as
235 * value where Unit objects are contained. */
236 Hashmap *units_requiring_mounts_for;
238 /* Reference to the kdbus bus control fd */
242 int manager_new(SystemdRunningAs running_as, Manager **m);
243 void manager_free(Manager *m);
245 int manager_enumerate(Manager *m);
246 int manager_startup(Manager *m, FILE *serialization, FDSet *fds);
248 Job *manager_get_job(Manager *m, uint32_t id);
249 Unit *manager_get_unit(Manager *m, const char *name);
251 int manager_get_unit_by_path(Manager *m, const char *path, const char *suffix, Unit **_found);
253 int manager_get_job_from_dbus_path(Manager *m, const char *s, Job **_j);
255 int manager_load_unit_prepare(Manager *m, const char *name, const char *path, sd_bus_error *e, Unit **_ret);
256 int manager_load_unit(Manager *m, const char *name, const char *path, sd_bus_error *e, Unit **_ret);
257 int manager_load_unit_from_dbus_path(Manager *m, const char *s, sd_bus_error *e, Unit **_u);
259 int manager_add_job(Manager *m, JobType type, Unit *unit, JobMode mode, bool force, sd_bus_error *e, Job **_ret);
260 int manager_add_job_by_name(Manager *m, JobType type, const char *name, JobMode mode, bool force, sd_bus_error *e, Job **_ret);
262 void manager_dump_units(Manager *s, FILE *f, const char *prefix);
263 void manager_dump_jobs(Manager *s, FILE *f, const char *prefix);
265 void manager_clear_jobs(Manager *m);
267 unsigned manager_dispatch_load_queue(Manager *m);
269 int manager_environment_add(Manager *m, char **minus, char **plus);
270 int manager_set_default_rlimits(Manager *m, struct rlimit **default_rlimit);
272 int manager_loop(Manager *m);
274 void manager_dispatch_bus_name_owner_changed(Manager *m, const char *name, const char* old_owner, const char *new_owner);
276 int manager_open_serialization(Manager *m, FILE **_f);
278 int manager_serialize(Manager *m, FILE *f, FDSet *fds, bool switching_root);
279 int manager_deserialize(Manager *m, FILE *f, FDSet *fds);
281 int manager_reload(Manager *m);
283 bool manager_is_reloading_or_reexecuting(Manager *m) _pure_;
285 void manager_reset_failed(Manager *m);
287 void manager_send_unit_audit(Manager *m, Unit *u, int type, bool success);
288 void manager_send_unit_plymouth(Manager *m, Unit *u);
290 bool manager_unit_inactive_or_pending(Manager *m, const char *name);
292 void manager_check_finished(Manager *m);
294 void manager_run_generators(Manager *m);
295 void manager_undo_generators(Manager *m);
297 void manager_recheck_journal(Manager *m);
299 void manager_set_show_status(Manager *m, bool b);
300 void manager_status_printf(Manager *m, bool ephemeral, const char *status, const char *format, ...) _printf_(4,5);
302 Set *manager_get_units_requiring_mounts_for(Manager *m, const char *path);