1 /*-*- Mode: C; c-basic-offset: 8 -*-*/
7 This file is part of systemd.
9 Copyright 2010 Lennart Poettering
11 systemd is free software; you can redistribute it and/or modify it
12 under the terms of the GNU General Public License as published by
13 the Free Software Foundation; either version 2 of the License, or
14 (at your option) any later version.
16 systemd is distributed in the hope that it will be useful, but
17 WITHOUT ANY WARRANTY; without even the implied warranty of
18 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
19 General Public License for more details.
21 You should have received a copy of the GNU General Public License
22 along with systemd; If not, see <http://www.gnu.org/licenses/>.
28 #include <dbus/dbus.h>
32 /* Enforce upper limit how many names we allow */
33 #define MANAGER_MAX_NAMES 2048
35 typedef struct Manager Manager;
36 typedef enum WatchType WatchType;
37 typedef struct Watch Watch;
39 typedef enum ManagerExitCode {
44 _MANAGER_EXIT_CODE_MAX,
45 _MANAGER_EXIT_CODE_INVALID = -1
48 typedef enum ManagerRunningAs {
51 _MANAGER_RUNNING_AS_MAX,
52 _MANAGER_RUNNING_AS_INVALID = -1
75 DBusTimeout *bus_timeout;
87 #include "path-lookup.h"
90 uint32_t current_job_id;
92 /* Note that the set of units we know of is allowed to be
93 * incosistent. However the subset of it that is loaded may
94 * not, and the list of jobs may neither. */
96 /* Active jobs and units */
97 Hashmap *units; /* name string => Unit object n:1 */
98 Hashmap *jobs; /* job id => Job object 1:1 */
100 /* To make it easy to iterate through the units of a specific
101 * type we maintain a per type linked list */
102 LIST_HEAD(Meta, units_per_type[_UNIT_TYPE_MAX]);
104 /* Units that need to be loaded */
105 LIST_HEAD(Meta, load_queue); /* this is actually more a stack than a queue, but uh. */
107 /* Jobs that need to be run */
108 LIST_HEAD(Job, run_queue); /* more a stack than a queue, too */
110 /* Units and jobs that have not yet been announced via
111 * D-Bus. When something about a job changes it is added here
112 * if it is not in there yet. This allows easy coalescing of
113 * D-Bus change signals. */
114 LIST_HEAD(Meta, dbus_unit_queue);
115 LIST_HEAD(Job, dbus_job_queue);
117 /* Units to remove */
118 LIST_HEAD(Meta, cleanup_queue);
120 /* Units to check when doing GC */
121 LIST_HEAD(Meta, gc_queue);
123 /* Jobs to be added */
124 Hashmap *transaction_jobs; /* Unit object => Job object list 1:1 */
125 JobDependency *transaction_anchor;
127 Hashmap *watch_pids; /* pid => Unit object n:1 */
136 unsigned n_snapshots;
138 LookupPaths lookup_paths;
139 Set *unit_path_cache;
143 dual_timestamp startup_timestamp;
145 /* Data specific to the device subsystem */
147 struct udev_monitor* udev_monitor;
150 /* Data specific to the mount subsystem */
151 FILE *proc_self_mountinfo;
154 /* Data specific to the swap filesystem */
157 /* Data specific to the D-Bus subsystem */
158 DBusConnection *api_bus, *system_bus;
159 DBusServer *private_bus;
160 Set *bus_connections, *bus_connections_for_dispatch;
162 DBusMessage *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 DBusConnection *queued_message_connection; /* The connection to send the queued message on */
168 Hashmap *watch_bus; /* D-Bus names => Unit object n:1 */
169 int32_t name_data_slot;
170 int32_t subscribed_data_slot;
172 /* Data specific to the Automount subsystem */
175 /* Data specific to the cgroup subsystem */
176 Hashmap *cgroup_bondings; /* path string => CGroupBonding object 1:n */
177 char *cgroup_hierarchy;
179 usec_t gc_queue_timestamp;
181 unsigned n_in_gc_queue;
183 /* Make sure the user cannot accidentaly unmount our cgroup
188 ManagerRunningAs running_as;
189 ManagerExitCode exit_code:4;
191 bool dispatching_load_queue:1;
192 bool dispatching_run_queue:1;
193 bool dispatching_dbus_queue:1;
195 bool utmp_reboot_written:1;
203 int manager_new(ManagerRunningAs running_as, Manager **m);
204 void manager_free(Manager *m);
206 int manager_enumerate(Manager *m);
207 int manager_coldplug(Manager *m);
208 int manager_startup(Manager *m, FILE *serialization, FDSet *fds);
210 Job *manager_get_job(Manager *m, uint32_t id);
211 Unit *manager_get_unit(Manager *m, const char *name);
213 int manager_get_unit_from_dbus_path(Manager *m, const char *s, Unit **_u);
214 int manager_get_job_from_dbus_path(Manager *m, const char *s, Job **_j);
216 int manager_load_unit_prepare(Manager *m, const char *name, const char *path, DBusError *e, Unit **_ret);
217 int manager_load_unit(Manager *m, const char *name, const char *path, DBusError *e, Unit **_ret);
219 int manager_add_job(Manager *m, JobType type, Unit *unit, JobMode mode, bool force, DBusError *e, Job **_ret);
220 int manager_add_job_by_name(Manager *m, JobType type, const char *name, JobMode mode, bool force, DBusError *e, Job **_ret);
222 void manager_dump_units(Manager *s, FILE *f, const char *prefix);
223 void manager_dump_jobs(Manager *s, FILE *f, const char *prefix);
225 void manager_transaction_unlink_job(Manager *m, Job *j, bool delete_dependencies);
227 void manager_clear_jobs(Manager *m);
229 unsigned manager_dispatch_load_queue(Manager *m);
230 unsigned manager_dispatch_run_queue(Manager *m);
231 unsigned manager_dispatch_dbus_queue(Manager *m);
233 int manager_loop(Manager *m);
235 void manager_write_utmp_reboot(Manager *m);
236 void manager_write_utmp_runlevel(Manager *m, Unit *t);
238 void manager_dispatch_bus_name_owner_changed(Manager *m, const char *name, const char* old_owner, const char *new_owner);
239 void manager_dispatch_bus_query_pid_done(Manager *m, const char *name, pid_t pid);
241 int manager_open_serialization(FILE **_f);
243 int manager_serialize(Manager *m, FILE *f, FDSet *fds);
244 int manager_deserialize(Manager *m, FILE *f, FDSet *fds);
246 int manager_reload(Manager *m);
248 bool manager_is_booting_or_shutting_down(Manager *m);
250 const char *manager_running_as_to_string(ManagerRunningAs i);
251 ManagerRunningAs manager_running_as_from_string(const char *s);