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 {
49 MANAGER_INIT, /* root and pid=1 */
50 MANAGER_SYSTEM, /* root and pid!=1 */
51 MANAGER_SESSION, /* non-root, for a session */
52 _MANAGER_RUNNING_AS_MAX,
53 _MANAGER_RUNNING_AS_INVALID = -1
74 DBusTimeout *bus_timeout;
86 #include "path-lookup.h"
89 uint32_t current_job_id;
91 /* Note that the set of units we know of is allowed to be
92 * incosistent. 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(Meta, units_per_type[_UNIT_TYPE_MAX]);
103 /* Units that need to be loaded */
104 LIST_HEAD(Meta, load_queue); /* this is actually more a stack than a queue, but uh. */
106 /* Jobs that need to be run */
107 LIST_HEAD(Job, run_queue); /* more a stack than a queue, too */
109 /* Units and jobs that have not yet been announced via
110 * D-Bus. When something about a job changes it is added here
111 * if it is not in there yet. This allows easy coalescing of
112 * D-Bus change signals. */
113 LIST_HEAD(Meta, dbus_unit_queue);
114 LIST_HEAD(Job, dbus_job_queue);
116 /* Units to remove */
117 LIST_HEAD(Meta, cleanup_queue);
119 /* Units to check when doing GC */
120 LIST_HEAD(Meta, gc_queue);
122 /* Jobs to be added */
123 Hashmap *transaction_jobs; /* Unit object => Job object list 1:1 */
124 JobDependency *transaction_anchor;
126 Hashmap *watch_pids; /* pid => Unit object n:1 */
133 unsigned n_snapshots;
135 LookupPaths lookup_paths;
139 timestamp startup_timestamp;
141 /* Data specific to the device subsystem */
143 struct udev_monitor* udev_monitor;
146 /* Data specific to the mount subsystem */
147 FILE *proc_self_mountinfo;
150 /* Data specific to the swap filesystem */
153 /* Data specific to the D-Bus subsystem */
154 DBusConnection *api_bus, *system_bus;
156 DBusMessage *queued_message; /* This is used during reloading:
157 * before the reload we queue the
158 * reply message here, and
159 * afterwards we send it */
161 Hashmap *watch_bus; /* D-Bus names => Unit object n:1 */
162 int32_t name_data_slot;
164 /* Data specific to the Automount subsystem */
167 /* Data specific to the cgroup subsystem */
168 Hashmap *cgroup_bondings; /* path string => CGroupBonding object 1:n */
169 char *cgroup_controller;
170 char *cgroup_mount_point;
171 char *cgroup_hierarchy;
173 usec_t gc_queue_timestamp;
175 unsigned n_in_gc_queue;
177 /* Make sure the user cannot accidentaly unmount our cgroup
182 ManagerRunningAs running_as;
183 ManagerExitCode exit_code:4;
185 bool dispatching_load_queue:1;
186 bool dispatching_run_queue:1;
187 bool dispatching_dbus_queue:1;
189 bool request_api_bus_dispatch:1;
190 bool request_system_bus_dispatch:1;
192 bool utmp_reboot_written:1;
194 bool confirm_spawn:1;
197 int manager_new(ManagerRunningAs running_as, bool confirm_spawn, Manager **m);
198 void manager_free(Manager *m);
200 int manager_enumerate(Manager *m);
201 int manager_coldplug(Manager *m);
202 int manager_startup(Manager *m, FILE *serialization, FDSet *fds);
204 Job *manager_get_job(Manager *m, uint32_t id);
205 Unit *manager_get_unit(Manager *m, const char *name);
207 int manager_get_unit_from_dbus_path(Manager *m, const char *s, Unit **_u);
208 int manager_get_job_from_dbus_path(Manager *m, const char *s, Job **_j);
210 int manager_load_unit_prepare(Manager *m, const char *name, const char *path, Unit **_ret);
211 int manager_load_unit(Manager *m, const char *name, const char *path, Unit **_ret);
213 int manager_add_job(Manager *m, JobType type, Unit *unit, JobMode mode, bool force, Job **_ret);
214 int manager_add_job_by_name(Manager *m, JobType type, const char *name, JobMode mode, bool force, Job **_ret);
216 void manager_dump_units(Manager *s, FILE *f, const char *prefix);
217 void manager_dump_jobs(Manager *s, FILE *f, const char *prefix);
219 void manager_transaction_unlink_job(Manager *m, Job *j, bool delete_dependencies);
221 void manager_clear_jobs(Manager *m);
223 unsigned manager_dispatch_load_queue(Manager *m);
224 unsigned manager_dispatch_run_queue(Manager *m);
225 unsigned manager_dispatch_dbus_queue(Manager *m);
227 int manager_loop(Manager *m);
229 void manager_write_utmp_reboot(Manager *m);
230 void manager_write_utmp_runlevel(Manager *m, Unit *t);
232 void manager_dispatch_bus_name_owner_changed(Manager *m, const char *name, const char* old_owner, const char *new_owner);
233 void manager_dispatch_bus_query_pid_done(Manager *m, const char *name, pid_t pid);
235 int manager_open_serialization(FILE **_f);
237 int manager_serialize(Manager *m, FILE *f, FDSet *fds);
238 int manager_deserialize(Manager *m, FILE *f, FDSet *fds);
240 int manager_reload(Manager *m);
242 const char *manager_running_as_to_string(ManagerRunningAs i);
243 ManagerRunningAs manager_running_as_from_string(const char *s);