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 */
102 sd_event_source *notify_event_source;
105 sd_event_source *signal_event_source;
108 sd_event_source *time_change_event_source;
110 sd_event_source *jobs_in_progress_event_source;
112 unsigned n_snapshots;
114 LookupPaths lookup_paths;
115 Set *unit_path_cache;
119 usec_t runtime_watchdog;
120 usec_t shutdown_watchdog;
122 dual_timestamp firmware_timestamp;
123 dual_timestamp loader_timestamp;
124 dual_timestamp kernel_timestamp;
125 dual_timestamp initrd_timestamp;
126 dual_timestamp userspace_timestamp;
127 dual_timestamp finish_timestamp;
128 dual_timestamp security_start_timestamp;
129 dual_timestamp security_finish_timestamp;
130 dual_timestamp generators_start_timestamp;
131 dual_timestamp generators_finish_timestamp;
132 dual_timestamp units_load_start_timestamp;
133 dual_timestamp units_load_finish_timestamp;
135 char *generator_unit_path;
136 char *generator_unit_path_early;
137 char *generator_unit_path_late;
139 /* Data specific to the device subsystem */
141 struct udev_monitor* udev_monitor;
142 sd_event_source *udev_event_source;
143 Hashmap *devices_by_sysfs;
145 /* Data specific to the mount subsystem */
146 FILE *proc_self_mountinfo;
147 sd_event_source *mount_event_source;
149 /* Data specific to the swap filesystem */
151 sd_event_source *swap_event_source;
152 Hashmap *swaps_by_proc_swaps;
155 /* Data specific to the D-Bus subsystem */
156 sd_bus *api_bus, *system_bus;
158 int private_listen_fd;
159 sd_event_source *private_listen_event_source;
162 sd_bus_message *queued_message; /* This is used during reloading:
163 * before the reload we queue the
164 * reply message here, and
165 * afterwards we send it */
166 sd_bus *queued_message_bus; /* The connection to send the queued message on */
168 Hashmap *watch_bus; /* D-Bus names => Unit object n:1 */
170 bool send_reloading_done;
172 uint32_t current_job_id;
173 uint32_t default_unit_job_id;
175 /* Data specific to the Automount subsystem */
178 /* Data specific to the cgroup subsystem */
179 Hashmap *cgroup_unit;
180 CGroupControllerMask cgroup_supported;
184 unsigned n_in_gc_queue;
186 /* Make sure the user cannot accidentally unmount our cgroup
191 SystemdRunningAs running_as;
192 ManagerExitCode exit_code:5;
194 bool dispatching_load_queue:1;
195 bool dispatching_run_queue:1;
196 bool dispatching_dbus_queue:1;
202 bool no_console_output;
204 ExecOutput default_std_output, default_std_error;
206 usec_t default_restart_usec, default_timeout_start_usec,
207 default_timeout_stop_usec;
209 usec_t default_start_limit_interval;
210 unsigned default_start_limit_burst;
212 struct rlimit *rlimit[RLIMIT_NLIMITS];
214 /* non-zero if we are reloading or reexecuting, */
217 unsigned n_installed_jobs;
218 unsigned n_failed_jobs;
220 /* Jobs in progress watching */
221 unsigned n_running_jobs;
222 unsigned n_on_console;
223 unsigned jobs_in_progress_iteration;
225 /* Type=idle pipes */
227 sd_event_source *idle_pipe_event_source;
230 char *switch_root_init;
232 /* This maps all possible path prefixes to the units needing
233 * them. It's a hashmap with a path string as key and a Set as
234 * value where Unit objects are contained. */
235 Hashmap *units_requiring_mounts_for;
238 int manager_new(SystemdRunningAs running_as, bool reexecuting, Manager **m);
239 void manager_free(Manager *m);
241 int manager_enumerate(Manager *m);
242 int manager_startup(Manager *m, FILE *serialization, FDSet *fds);
244 Job *manager_get_job(Manager *m, uint32_t id);
245 Unit *manager_get_unit(Manager *m, const char *name);
247 int manager_get_unit_by_path(Manager *m, const char *path, const char *suffix, Unit **_found);
249 int manager_get_job_from_dbus_path(Manager *m, const char *s, Job **_j);
251 int manager_load_unit_prepare(Manager *m, const char *name, const char *path, sd_bus_error *e, Unit **_ret);
252 int manager_load_unit(Manager *m, const char *name, const char *path, sd_bus_error *e, Unit **_ret);
253 int manager_load_unit_from_dbus_path(Manager *m, const char *s, sd_bus_error *e, Unit **_u);
255 int manager_add_job(Manager *m, JobType type, Unit *unit, JobMode mode, bool force, sd_bus_error *e, Job **_ret);
256 int manager_add_job_by_name(Manager *m, JobType type, const char *name, JobMode mode, bool force, sd_bus_error *e, Job **_ret);
258 void manager_dump_units(Manager *s, FILE *f, const char *prefix);
259 void manager_dump_jobs(Manager *s, FILE *f, const char *prefix);
261 void manager_clear_jobs(Manager *m);
263 unsigned manager_dispatch_load_queue(Manager *m);
265 int manager_environment_add(Manager *m, char **minus, char **plus);
266 int manager_set_default_rlimits(Manager *m, struct rlimit **default_rlimit);
268 int manager_loop(Manager *m);
270 void manager_dispatch_bus_name_owner_changed(Manager *m, const char *name, const char* old_owner, const char *new_owner);
272 int manager_open_serialization(Manager *m, FILE **_f);
274 int manager_serialize(Manager *m, FILE *f, FDSet *fds, bool switching_root);
275 int manager_deserialize(Manager *m, FILE *f, FDSet *fds);
277 int manager_reload(Manager *m);
279 bool manager_is_reloading_or_reexecuting(Manager *m) _pure_;
281 void manager_reset_failed(Manager *m);
283 void manager_send_unit_audit(Manager *m, Unit *u, int type, bool success);
284 void manager_send_unit_plymouth(Manager *m, Unit *u);
286 bool manager_unit_inactive_or_pending(Manager *m, const char *name);
288 void manager_check_finished(Manager *m);
290 void manager_run_generators(Manager *m);
291 void manager_undo_generators(Manager *m);
293 void manager_recheck_journal(Manager *m);
295 void manager_set_show_status(Manager *m, bool b);
296 void manager_status_printf(Manager *m, bool ephemeral, const char *status, const char *format, ...) _printf_(4,5);
298 Set *manager_get_units_requiring_mounts_for(Manager *m, const char *path);