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/>.
27 #include <dbus/dbus.h>
31 /* Enforce upper limit how many names we allow */
32 #define MANAGER_MAX_NAMES 131072 /* 128K */
34 typedef struct Manager Manager;
35 typedef enum WatchType WatchType;
36 typedef struct Watch Watch;
38 typedef enum ManagerExitCode {
48 _MANAGER_EXIT_CODE_MAX,
49 _MANAGER_EXIT_CODE_INVALID = -1
65 WATCH_JOBS_IN_PROGRESS
75 DBusTimeout *bus_timeout;
87 #include "path-lookup.h"
91 /* Note that the set of units we know of is allowed to be
92 * inconsistent. However the subset of it that is loaded may
93 * not, and the list of jobs may neither. */
95 /* Active jobs and units */
96 Hashmap *units; /* name string => Unit object n:1 */
97 Hashmap *jobs; /* job id => Job object 1:1 */
99 /* To make it easy to iterate through the units of a specific
100 * type we maintain a per type linked list */
101 LIST_HEAD(Unit, units_by_type[_UNIT_TYPE_MAX]);
103 /* To optimize iteration of units that have requires_mounts_for set */
104 LIST_HEAD(Unit, has_requires_mounts_for);
106 /* Units that need to be loaded */
107 LIST_HEAD(Unit, load_queue); /* this is actually more a stack than a queue, but uh. */
109 /* Jobs that need to be run */
110 LIST_HEAD(Job, run_queue); /* more a stack than a queue, too */
112 /* Units and jobs that have not yet been announced via
113 * D-Bus. When something about a job changes it is added here
114 * if it is not in there yet. This allows easy coalescing of
115 * D-Bus change signals. */
116 LIST_HEAD(Unit, dbus_unit_queue);
117 LIST_HEAD(Job, dbus_job_queue);
119 /* Units to remove */
120 LIST_HEAD(Unit, cleanup_queue);
122 /* Units to check when doing GC */
123 LIST_HEAD(Unit, gc_queue);
125 Hashmap *watch_pids; /* pid => Unit object n:1 */
131 Watch time_change_watch;
132 Watch jobs_in_progress_watch;
136 unsigned n_snapshots;
138 LookupPaths lookup_paths;
139 Set *unit_path_cache;
142 char **default_controllers;
144 usec_t runtime_watchdog;
145 usec_t shutdown_watchdog;
147 dual_timestamp firmware_timestamp;
148 dual_timestamp loader_timestamp;
149 dual_timestamp kernel_timestamp;
150 dual_timestamp initrd_timestamp;
151 dual_timestamp userspace_timestamp;
152 dual_timestamp finish_timestamp;
153 dual_timestamp generators_start_timestamp;
154 dual_timestamp generators_finish_timestamp;
156 char *generator_unit_path;
157 char *generator_unit_path_early;
158 char *generator_unit_path_late;
160 /* Data specific to the device subsystem */
162 struct udev_monitor* udev_monitor;
164 Hashmap *devices_by_sysfs;
166 /* Data specific to the mount subsystem */
167 FILE *proc_self_mountinfo;
170 /* Data specific to the swap filesystem */
172 Hashmap *swaps_by_proc_swaps;
176 /* Data specific to the D-Bus subsystem */
177 DBusConnection *api_bus, *system_bus;
178 DBusServer *private_bus;
179 Set *bus_connections, *bus_connections_for_dispatch;
181 DBusMessage *queued_message; /* This is used during reloading:
182 * before the reload we queue the
183 * reply message here, and
184 * afterwards we send it */
185 DBusConnection *queued_message_connection; /* The connection to send the queued message on */
187 Hashmap *watch_bus; /* D-Bus names => Unit object n:1 */
188 int32_t name_data_slot;
189 int32_t conn_data_slot;
190 int32_t subscribed_data_slot;
192 uint32_t current_job_id;
193 uint32_t default_unit_job_id;
195 /* Data specific to the Automount subsystem */
198 /* Data specific to the cgroup subsystem */
199 Hashmap *cgroup_bondings; /* path string => CGroupBonding object 1:n */
200 char *cgroup_hierarchy;
202 usec_t gc_queue_timestamp;
204 unsigned n_in_gc_queue;
206 /* Make sure the user cannot accidentally unmount our cgroup
211 SystemdRunningAs running_as;
212 ManagerExitCode exit_code:5;
214 bool dispatching_load_queue:1;
215 bool dispatching_run_queue:1;
216 bool dispatching_dbus_queue:1;
223 ExecOutput default_std_output, default_std_error;
225 struct rlimit *rlimit[RLIMIT_NLIMITS];
227 /* non-zero if we are reloading or reexecuting, */
230 unsigned n_installed_jobs;
231 unsigned n_failed_jobs;
233 /* Jobs in progress watching */
234 unsigned n_running_jobs;
235 unsigned n_on_console;
236 unsigned jobs_in_progress_iteration;
238 /* Type=idle pipes */
242 char *switch_root_init;
245 int manager_new(SystemdRunningAs running_as, Manager **m);
246 void manager_free(Manager *m);
248 int manager_enumerate(Manager *m);
249 int manager_coldplug(Manager *m);
250 int manager_startup(Manager *m, FILE *serialization, FDSet *fds);
252 Job *manager_get_job(Manager *m, uint32_t id);
253 Unit *manager_get_unit(Manager *m, const char *name);
255 int manager_get_job_from_dbus_path(Manager *m, const char *s, Job **_j);
257 int manager_load_unit_prepare(Manager *m, const char *name, const char *path, DBusError *e, Unit **_ret);
258 int manager_load_unit(Manager *m, const char *name, const char *path, DBusError *e, Unit **_ret);
259 int manager_load_unit_from_dbus_path(Manager *m, const char *s, DBusError *e, Unit **_u);
261 int manager_add_job(Manager *m, JobType type, Unit *unit, JobMode mode, bool force, DBusError *e, Job **_ret);
262 int manager_add_job_by_name(Manager *m, JobType type, const char *name, JobMode mode, bool force, DBusError *e, Job **_ret);
264 void manager_dump_units(Manager *s, FILE *f, const char *prefix);
265 void manager_dump_jobs(Manager *s, FILE *f, const char *prefix);
267 void manager_clear_jobs(Manager *m);
269 unsigned manager_dispatch_load_queue(Manager *m);
270 unsigned manager_dispatch_run_queue(Manager *m);
271 unsigned manager_dispatch_dbus_queue(Manager *m);
273 int manager_set_default_controllers(Manager *m, char **controllers);
274 int manager_set_default_rlimits(Manager *m, struct rlimit **default_rlimit);
276 int manager_loop(Manager *m);
278 void manager_dispatch_bus_name_owner_changed(Manager *m, const char *name, const char* old_owner, const char *new_owner);
279 void manager_dispatch_bus_query_pid_done(Manager *m, const char *name, pid_t pid);
281 int manager_open_serialization(Manager *m, FILE **_f);
283 int manager_serialize(Manager *m, FILE *f, FDSet *fds, bool switching_root);
284 int manager_deserialize(Manager *m, FILE *f, FDSet *fds);
285 int manager_distribute_fds(Manager *m, FDSet *fds);
287 int manager_reload(Manager *m);
289 bool manager_is_reloading_or_reexecuting(Manager *m) _pure_;
291 void manager_reset_failed(Manager *m);
293 void manager_send_unit_audit(Manager *m, Unit *u, int type, bool success);
294 void manager_send_unit_plymouth(Manager *m, Unit *u);
296 bool manager_unit_inactive_or_pending(Manager *m, const char *name);
298 void manager_check_finished(Manager *m);
300 void manager_run_generators(Manager *m);
301 void manager_undo_generators(Manager *m);
303 void manager_recheck_journal(Manager *m);
305 void manager_set_show_status(Manager *m, bool b);
306 void manager_status_printf(Manager *m, bool ephemeral, const char *status, const char *format, ...) _printf_attr_(4,5);
308 void watch_init(Watch *w);