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>
30 #include "cgroup-util.h"
32 /* Enforce upper limit how many names we allow */
33 #define MANAGER_MAX_NAMES 131072 /* 128K */
35 typedef struct Manager Manager
;
36 typedef enum WatchType WatchType
;
37 typedef struct Watch Watch
;
39 typedef enum ManagerExitCode
{
49 _MANAGER_EXIT_CODE_MAX
,
50 _MANAGER_EXIT_CODE_INVALID
= -1
66 WATCH_JOBS_IN_PROGRESS
,
77 DBusTimeout
*bus_timeout
;
89 #include "path-lookup.h"
91 #include "unit-name.h"
94 /* Note that the set of units we know of is allowed to be
95 * inconsistent. However the subset of it that is loaded may
96 * not, and the list of jobs may neither. */
98 /* Active jobs and units */
99 Hashmap
*units
; /* name string => Unit object n:1 */
100 Hashmap
*jobs
; /* job id => Job object 1:1 */
102 /* To make it easy to iterate through the units of a specific
103 * type we maintain a per type linked list */
104 LIST_HEAD(Unit
, units_by_type
[_UNIT_TYPE_MAX
]);
106 /* To optimize iteration of units that have requires_mounts_for set */
107 LIST_HEAD(Unit
, has_requires_mounts_for
);
109 /* Units that need to be loaded */
110 LIST_HEAD(Unit
, load_queue
); /* this is actually more a stack than a queue, but uh. */
112 /* Jobs that need to be run */
113 LIST_HEAD(Job
, run_queue
); /* more a stack than a queue, too */
115 /* Units and jobs that have not yet been announced via
116 * D-Bus. When something about a job changes it is added here
117 * if it is not in there yet. This allows easy coalescing of
118 * D-Bus change signals. */
119 LIST_HEAD(Unit
, dbus_unit_queue
);
120 LIST_HEAD(Job
, dbus_job_queue
);
122 /* Units to remove */
123 LIST_HEAD(Unit
, cleanup_queue
);
125 /* Units to check when doing GC */
126 LIST_HEAD(Unit
, gc_queue
);
128 /* Units that should be realized */
129 LIST_HEAD(Unit
, cgroup_queue
);
131 Hashmap
*watch_pids
; /* pid => Unit object n:1 */
137 Watch time_change_watch
;
138 Watch jobs_in_progress_watch
;
139 Watch idle_pipe_watch
;
143 unsigned n_snapshots
;
145 LookupPaths lookup_paths
;
146 Set
*unit_path_cache
;
150 usec_t runtime_watchdog
;
151 usec_t shutdown_watchdog
;
153 dual_timestamp firmware_timestamp
;
154 dual_timestamp loader_timestamp
;
155 dual_timestamp kernel_timestamp
;
156 dual_timestamp initrd_timestamp
;
157 dual_timestamp userspace_timestamp
;
158 dual_timestamp finish_timestamp
;
159 dual_timestamp generators_start_timestamp
;
160 dual_timestamp generators_finish_timestamp
;
161 dual_timestamp unitsload_start_timestamp
;
162 dual_timestamp unitsload_finish_timestamp
;
164 char *generator_unit_path
;
165 char *generator_unit_path_early
;
166 char *generator_unit_path_late
;
168 /* Data specific to the device subsystem */
170 struct udev_monitor
* udev_monitor
;
172 Hashmap
*devices_by_sysfs
;
174 /* Data specific to the mount subsystem */
175 FILE *proc_self_mountinfo
;
178 /* Data specific to the swap filesystem */
180 Hashmap
*swaps_by_proc_swaps
;
184 /* Data specific to the D-Bus subsystem */
185 DBusConnection
*api_bus
, *system_bus
;
186 DBusServer
*private_bus
;
187 Set
*bus_connections
, *bus_connections_for_dispatch
;
189 DBusMessage
*queued_message
; /* This is used during reloading:
190 * before the reload we queue the
191 * reply message here, and
192 * afterwards we send it */
193 DBusConnection
*queued_message_connection
; /* The connection to send the queued message on */
195 Hashmap
*watch_bus
; /* D-Bus names => Unit object n:1 */
196 int32_t name_data_slot
;
197 int32_t conn_data_slot
;
198 int32_t subscribed_data_slot
;
200 bool send_reloading_done
;
202 uint32_t current_job_id
;
203 uint32_t default_unit_job_id
;
205 /* Data specific to the Automount subsystem */
208 /* Data specific to the cgroup subsystem */
209 Hashmap
*cgroup_unit
;
210 CGroupControllerMask cgroup_supported
;
214 unsigned n_in_gc_queue
;
216 /* Make sure the user cannot accidentally unmount our cgroup
221 SystemdRunningAs running_as
;
222 ManagerExitCode exit_code
:5;
224 bool dispatching_load_queue
:1;
225 bool dispatching_run_queue
:1;
226 bool dispatching_dbus_queue
:1;
232 bool no_console_output
;
234 ExecOutput default_std_output
, default_std_error
;
236 struct rlimit
*rlimit
[RLIMIT_NLIMITS
];
238 /* non-zero if we are reloading or reexecuting, */
241 unsigned n_installed_jobs
;
242 unsigned n_failed_jobs
;
244 /* Jobs in progress watching */
245 unsigned n_running_jobs
;
246 unsigned n_on_console
;
247 unsigned jobs_in_progress_iteration
;
249 /* Type=idle pipes */
253 char *switch_root_init
;
256 int manager_new(SystemdRunningAs running_as
, bool reexecuting
, Manager
**m
);
257 void manager_free(Manager
*m
);
259 int manager_enumerate(Manager
*m
);
260 int manager_coldplug(Manager
*m
);
261 int manager_startup(Manager
*m
, FILE *serialization
, FDSet
*fds
);
263 Job
*manager_get_job(Manager
*m
, uint32_t id
);
264 Unit
*manager_get_unit(Manager
*m
, const char *name
);
266 int manager_get_job_from_dbus_path(Manager
*m
, const char *s
, Job
**_j
);
268 int manager_load_unit_prepare(Manager
*m
, const char *name
, const char *path
, DBusError
*e
, Unit
**_ret
);
269 int manager_load_unit(Manager
*m
, const char *name
, const char *path
, DBusError
*e
, Unit
**_ret
);
270 int manager_load_unit_from_dbus_path(Manager
*m
, const char *s
, DBusError
*e
, Unit
**_u
);
272 int manager_add_job(Manager
*m
, JobType type
, Unit
*unit
, JobMode mode
, bool force
, DBusError
*e
, Job
**_ret
);
273 int manager_add_job_by_name(Manager
*m
, JobType type
, const char *name
, JobMode mode
, bool force
, DBusError
*e
, Job
**_ret
);
275 void manager_dump_units(Manager
*s
, FILE *f
, const char *prefix
);
276 void manager_dump_jobs(Manager
*s
, FILE *f
, const char *prefix
);
278 void manager_clear_jobs(Manager
*m
);
280 unsigned manager_dispatch_load_queue(Manager
*m
);
281 unsigned manager_dispatch_run_queue(Manager
*m
);
282 unsigned manager_dispatch_dbus_queue(Manager
*m
);
284 int manager_set_default_environment(Manager
*m
, char **environment
);
285 int manager_set_default_rlimits(Manager
*m
, struct rlimit
**default_rlimit
);
287 int manager_loop(Manager
*m
);
289 void manager_dispatch_bus_name_owner_changed(Manager
*m
, const char *name
, const char* old_owner
, const char *new_owner
);
290 void manager_dispatch_bus_query_pid_done(Manager
*m
, const char *name
, pid_t pid
);
292 int manager_open_serialization(Manager
*m
, FILE **_f
);
294 int manager_serialize(Manager
*m
, FILE *f
, FDSet
*fds
, bool switching_root
);
295 int manager_deserialize(Manager
*m
, FILE *f
, FDSet
*fds
);
296 int manager_distribute_fds(Manager
*m
, FDSet
*fds
);
298 int manager_reload(Manager
*m
);
300 bool manager_is_reloading_or_reexecuting(Manager
*m
) _pure_
;
302 void manager_reset_failed(Manager
*m
);
304 void manager_send_unit_audit(Manager
*m
, Unit
*u
, int type
, bool success
);
305 void manager_send_unit_plymouth(Manager
*m
, Unit
*u
);
307 bool manager_unit_inactive_or_pending(Manager
*m
, const char *name
);
309 void manager_check_finished(Manager
*m
);
311 void manager_run_generators(Manager
*m
);
312 void manager_undo_generators(Manager
*m
);
314 void manager_recheck_journal(Manager
*m
);
316 void manager_set_show_status(Manager
*m
, bool b
);
317 void manager_status_printf(Manager
*m
, bool ephemeral
, const char *status
, const char *format
, ...) _printf_attr_(4,5);
319 void watch_init(Watch
*w
);