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 Hashmap *watch_pids; /* pid => Unit object n:1 */
101 sd_event_source *run_queue_event_source;
105 sd_event_source *notify_event_source;
108 sd_event_source *signal_event_source;
111 sd_event_source *time_change_event_source;
113 sd_event_source *jobs_in_progress_event_source;
115 unsigned n_snapshots;
117 LookupPaths lookup_paths;
118 Set *unit_path_cache;
122 usec_t runtime_watchdog;
123 usec_t shutdown_watchdog;
125 dual_timestamp firmware_timestamp;
126 dual_timestamp loader_timestamp;
127 dual_timestamp kernel_timestamp;
128 dual_timestamp initrd_timestamp;
129 dual_timestamp userspace_timestamp;
130 dual_timestamp finish_timestamp;
131 dual_timestamp security_start_timestamp;
132 dual_timestamp security_finish_timestamp;
133 dual_timestamp generators_start_timestamp;
134 dual_timestamp generators_finish_timestamp;
135 dual_timestamp units_load_start_timestamp;
136 dual_timestamp units_load_finish_timestamp;
138 char *generator_unit_path;
139 char *generator_unit_path_early;
140 char *generator_unit_path_late;
144 /* Data specific to the device subsystem */
145 struct udev_monitor* udev_monitor;
146 sd_event_source *udev_event_source;
147 Hashmap *devices_by_sysfs;
149 /* Data specific to the mount subsystem */
150 FILE *proc_self_mountinfo;
151 sd_event_source *mount_event_source;
153 /* Data specific to the swap filesystem */
155 sd_event_source *swap_event_source;
156 Hashmap *swaps_by_devnode;
158 /* Data specific to the D-Bus subsystem */
159 sd_bus *api_bus, *system_bus;
161 int private_listen_fd;
162 sd_event_source *private_listen_event_source;
165 sd_bus_message *queued_message; /* This is used during reloading:
166 * before the reload we queue the
167 * reply message here, and
168 * afterwards we send it */
169 sd_bus *queued_message_bus; /* The connection to send the queued message on */
171 Hashmap *watch_bus; /* D-Bus names => Unit object n:1 */
173 bool send_reloading_done;
175 uint32_t current_job_id;
176 uint32_t default_unit_job_id;
178 /* Data specific to the Automount subsystem */
181 /* Data specific to the cgroup subsystem */
182 Hashmap *cgroup_unit;
183 CGroupControllerMask cgroup_supported;
187 unsigned n_in_gc_queue;
189 /* Make sure the user cannot accidentally unmount our cgroup
194 SystemdRunningAs running_as;
195 ManagerExitCode exit_code:5;
197 bool dispatching_load_queue:1;
198 bool dispatching_dbus_queue:1;
202 ShowStatus show_status;
204 bool no_console_output;
206 ExecOutput default_std_output, default_std_error;
208 usec_t default_restart_usec, default_timeout_start_usec,
209 default_timeout_stop_usec;
211 usec_t default_start_limit_interval;
212 unsigned default_start_limit_burst;
214 struct rlimit *rlimit[RLIMIT_NLIMITS];
216 /* non-zero if we are reloading or reexecuting, */
219 unsigned n_installed_jobs;
220 unsigned n_failed_jobs;
222 /* Jobs in progress watching */
223 unsigned n_running_jobs;
224 unsigned n_on_console;
225 unsigned jobs_in_progress_iteration;
227 /* Type=idle pipes */
229 sd_event_source *idle_pipe_event_source;
232 char *switch_root_init;
234 /* This maps all possible path prefixes to the units needing
235 * them. It's a hashmap with a path string as key and a Set as
236 * value where Unit objects are contained. */
237 Hashmap *units_requiring_mounts_for;
239 /* Reference to the kdbus bus control fd */
243 int manager_new(SystemdRunningAs running_as, Manager **m);
244 void manager_free(Manager *m);
246 int manager_enumerate(Manager *m);
247 int manager_startup(Manager *m, FILE *serialization, FDSet *fds);
249 Job *manager_get_job(Manager *m, uint32_t id);
250 Unit *manager_get_unit(Manager *m, const char *name);
252 int manager_get_unit_by_path(Manager *m, const char *path, const char *suffix, Unit **_found);
254 int manager_get_job_from_dbus_path(Manager *m, const char *s, Job **_j);
256 int manager_load_unit_prepare(Manager *m, const char *name, const char *path, sd_bus_error *e, Unit **_ret);
257 int manager_load_unit(Manager *m, const char *name, const char *path, sd_bus_error *e, Unit **_ret);
258 int manager_load_unit_from_dbus_path(Manager *m, const char *s, sd_bus_error *e, Unit **_u);
260 int manager_add_job(Manager *m, JobType type, Unit *unit, JobMode mode, bool force, sd_bus_error *e, Job **_ret);
261 int manager_add_job_by_name(Manager *m, JobType type, const char *name, JobMode mode, bool force, sd_bus_error *e, Job **_ret);
263 void manager_dump_units(Manager *s, FILE *f, const char *prefix);
264 void manager_dump_jobs(Manager *s, FILE *f, const char *prefix);
266 void manager_clear_jobs(Manager *m);
268 unsigned manager_dispatch_load_queue(Manager *m);
270 int manager_environment_add(Manager *m, char **minus, char **plus);
271 int manager_set_default_rlimits(Manager *m, struct rlimit **default_rlimit);
273 int manager_loop(Manager *m);
275 void manager_dispatch_bus_name_owner_changed(Manager *m, const char *name, const char* old_owner, const char *new_owner);
277 int manager_open_serialization(Manager *m, FILE **_f);
279 int manager_serialize(Manager *m, FILE *f, FDSet *fds, bool switching_root);
280 int manager_deserialize(Manager *m, FILE *f, FDSet *fds);
282 int manager_reload(Manager *m);
284 bool manager_is_reloading_or_reexecuting(Manager *m) _pure_;
286 void manager_reset_failed(Manager *m);
288 void manager_send_unit_audit(Manager *m, Unit *u, int type, bool success);
289 void manager_send_unit_plymouth(Manager *m, Unit *u);
291 bool manager_unit_inactive_or_pending(Manager *m, const char *name);
293 void manager_check_finished(Manager *m);
295 void manager_run_generators(Manager *m);
296 void manager_undo_generators(Manager *m);
298 void manager_recheck_journal(Manager *m);
300 void manager_set_show_status(Manager *m, ShowStatus mode);
301 void manager_status_printf(Manager *m, bool ephemeral, const char *status, const char *format, ...) _printf_(4,5);
302 void manager_flip_auto_status(Manager *m, bool enable);
304 Set *manager_get_units_requiring_mounts_for(Manager *m, const char *path);