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;
172 sd_bus_message *queued_message; /* This is used during reloading:
173 * before the reload we queue the
174 * reply message here, and
175 * afterwards we send it */
176 sd_bus *queued_message_bus; /* The connection to send the queued message on */
178 Hashmap *watch_bus; /* D-Bus names => Unit object n:1 */
180 bool send_reloading_done;
182 uint32_t current_job_id;
183 uint32_t default_unit_job_id;
185 /* Data specific to the Automount subsystem */
188 /* Data specific to the cgroup subsystem */
189 Hashmap *cgroup_unit;
190 CGroupControllerMask cgroup_supported;
194 unsigned n_in_gc_queue;
196 /* Make sure the user cannot accidentally unmount our cgroup
201 SystemdRunningAs running_as;
202 ManagerExitCode exit_code:5;
204 bool dispatching_load_queue:1;
205 bool dispatching_dbus_queue:1;
209 ShowStatus show_status;
211 bool no_console_output;
213 ExecOutput default_std_output, default_std_error;
215 usec_t default_restart_usec, default_timeout_start_usec,
216 default_timeout_stop_usec;
218 usec_t default_start_limit_interval;
219 unsigned default_start_limit_burst;
221 struct rlimit *rlimit[RLIMIT_NLIMITS];
223 /* non-zero if we are reloading or reexecuting, */
226 unsigned n_installed_jobs;
227 unsigned n_failed_jobs;
229 /* Jobs in progress watching */
230 unsigned n_running_jobs;
231 unsigned n_on_console;
232 unsigned jobs_in_progress_iteration;
234 /* Type=idle pipes */
236 sd_event_source *idle_pipe_event_source;
239 char *switch_root_init;
241 /* This maps all possible path prefixes to the units needing
242 * them. It's a hashmap with a path string as key and a Set as
243 * value where Unit objects are contained. */
244 Hashmap *units_requiring_mounts_for;
246 /* Reference to the kdbus bus control fd */
250 int manager_new(SystemdRunningAs running_as, Manager **m);
251 void manager_free(Manager *m);
253 int manager_enumerate(Manager *m);
254 int manager_startup(Manager *m, FILE *serialization, FDSet *fds);
256 Job *manager_get_job(Manager *m, uint32_t id);
257 Unit *manager_get_unit(Manager *m, const char *name);
259 int manager_get_unit_by_path(Manager *m, const char *path, const char *suffix, Unit **_found);
261 int manager_get_job_from_dbus_path(Manager *m, const char *s, Job **_j);
263 int manager_load_unit_prepare(Manager *m, const char *name, const char *path, sd_bus_error *e, Unit **_ret);
264 int manager_load_unit(Manager *m, const char *name, const char *path, sd_bus_error *e, Unit **_ret);
265 int manager_load_unit_from_dbus_path(Manager *m, const char *s, sd_bus_error *e, Unit **_u);
267 int manager_add_job(Manager *m, JobType type, Unit *unit, JobMode mode, bool force, sd_bus_error *e, Job **_ret);
268 int manager_add_job_by_name(Manager *m, JobType type, const char *name, JobMode mode, bool force, sd_bus_error *e, Job **_ret);
270 void manager_dump_units(Manager *s, FILE *f, const char *prefix);
271 void manager_dump_jobs(Manager *s, FILE *f, const char *prefix);
273 void manager_clear_jobs(Manager *m);
275 unsigned manager_dispatch_load_queue(Manager *m);
277 int manager_environment_add(Manager *m, char **minus, char **plus);
278 int manager_set_default_rlimits(Manager *m, struct rlimit **default_rlimit);
280 int manager_loop(Manager *m);
282 void manager_dispatch_bus_name_owner_changed(Manager *m, const char *name, const char* old_owner, const char *new_owner);
284 int manager_open_serialization(Manager *m, FILE **_f);
286 int manager_serialize(Manager *m, FILE *f, FDSet *fds, bool switching_root);
287 int manager_deserialize(Manager *m, FILE *f, FDSet *fds);
289 int manager_reload(Manager *m);
291 bool manager_is_reloading_or_reexecuting(Manager *m) _pure_;
293 void manager_reset_failed(Manager *m);
295 void manager_send_unit_audit(Manager *m, Unit *u, int type, bool success);
296 void manager_send_unit_plymouth(Manager *m, Unit *u);
298 bool manager_unit_inactive_or_pending(Manager *m, const char *name);
300 void manager_check_finished(Manager *m);
302 void manager_run_generators(Manager *m);
303 void manager_undo_generators(Manager *m);
305 void manager_recheck_journal(Manager *m);
307 void manager_set_show_status(Manager *m, ShowStatus mode);
308 void manager_status_printf(Manager *m, bool ephemeral, const char *status, const char *format, ...) _printf_(4,5);
309 void manager_flip_auto_status(Manager *m, bool enable);
311 Set *manager_get_units_requiring_mounts_for(Manager *m, const char *path);