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
76 DBusTimeout
*bus_timeout
;
88 #include "path-lookup.h"
90 #include "unit-name.h"
93 /* Note that the set of units we know of is allowed to be
94 * inconsistent. However the subset of it that is loaded may
95 * not, and the list of jobs may neither. */
97 /* Active jobs and units */
98 Hashmap
*units
; /* name string => Unit object n:1 */
99 Hashmap
*jobs
; /* job id => Job object 1:1 */
101 /* To make it easy to iterate through the units of a specific
102 * type we maintain a per type linked list */
103 LIST_HEAD(Unit
, units_by_type
[_UNIT_TYPE_MAX
]);
105 /* To optimize iteration of units that have requires_mounts_for set */
106 LIST_HEAD(Unit
, has_requires_mounts_for
);
108 /* Units that need to be loaded */
109 LIST_HEAD(Unit
, load_queue
); /* this is actually more a stack than a queue, but uh. */
111 /* Jobs that need to be run */
112 LIST_HEAD(Job
, run_queue
); /* more a stack than a queue, too */
114 /* Units and jobs that have not yet been announced via
115 * D-Bus. When something about a job changes it is added here
116 * if it is not in there yet. This allows easy coalescing of
117 * D-Bus change signals. */
118 LIST_HEAD(Unit
, dbus_unit_queue
);
119 LIST_HEAD(Job
, dbus_job_queue
);
121 /* Units to remove */
122 LIST_HEAD(Unit
, cleanup_queue
);
124 /* Units to check when doing GC */
125 LIST_HEAD(Unit
, gc_queue
);
127 /* Units that should be realized */
128 LIST_HEAD(Unit
, cgroup_queue
);
130 Hashmap
*watch_pids
; /* pid => Unit object n:1 */
136 Watch time_change_watch
;
137 Watch jobs_in_progress_watch
;
141 unsigned n_snapshots
;
143 LookupPaths lookup_paths
;
144 Set
*unit_path_cache
;
148 usec_t runtime_watchdog
;
149 usec_t shutdown_watchdog
;
151 dual_timestamp firmware_timestamp
;
152 dual_timestamp loader_timestamp
;
153 dual_timestamp kernel_timestamp
;
154 dual_timestamp initrd_timestamp
;
155 dual_timestamp userspace_timestamp
;
156 dual_timestamp finish_timestamp
;
157 dual_timestamp generators_start_timestamp
;
158 dual_timestamp generators_finish_timestamp
;
159 dual_timestamp unitsload_start_timestamp
;
160 dual_timestamp unitsload_finish_timestamp
;
162 char *generator_unit_path
;
163 char *generator_unit_path_early
;
164 char *generator_unit_path_late
;
166 /* Data specific to the device subsystem */
168 struct udev_monitor
* udev_monitor
;
170 Hashmap
*devices_by_sysfs
;
172 /* Data specific to the mount subsystem */
173 FILE *proc_self_mountinfo
;
176 /* Data specific to the swap filesystem */
178 Hashmap
*swaps_by_proc_swaps
;
182 /* Data specific to the D-Bus subsystem */
183 DBusConnection
*api_bus
, *system_bus
;
184 DBusServer
*private_bus
;
185 Set
*bus_connections
, *bus_connections_for_dispatch
;
187 DBusMessage
*queued_message
; /* This is used during reloading:
188 * before the reload we queue the
189 * reply message here, and
190 * afterwards we send it */
191 DBusConnection
*queued_message_connection
; /* The connection to send the queued message on */
193 Hashmap
*watch_bus
; /* D-Bus names => Unit object n:1 */
194 int32_t name_data_slot
;
195 int32_t conn_data_slot
;
196 int32_t subscribed_data_slot
;
198 uint32_t current_job_id
;
199 uint32_t default_unit_job_id
;
201 /* Data specific to the Automount subsystem */
204 /* Data specific to the cgroup subsystem */
205 Hashmap
*cgroup_unit
;
206 CGroupControllerMask cgroup_supported
;
209 usec_t gc_queue_timestamp
;
211 unsigned n_in_gc_queue
;
213 /* Make sure the user cannot accidentally unmount our cgroup
218 SystemdRunningAs running_as
;
219 ManagerExitCode exit_code
:5;
221 bool dispatching_load_queue
:1;
222 bool dispatching_run_queue
:1;
223 bool dispatching_dbus_queue
:1;
230 ExecOutput default_std_output
, default_std_error
;
232 struct rlimit
*rlimit
[RLIMIT_NLIMITS
];
234 /* non-zero if we are reloading or reexecuting, */
237 unsigned n_installed_jobs
;
238 unsigned n_failed_jobs
;
240 /* Jobs in progress watching */
241 unsigned n_running_jobs
;
242 unsigned n_on_console
;
243 unsigned jobs_in_progress_iteration
;
245 /* Type=idle pipes */
249 char *switch_root_init
;
252 int manager_new(SystemdRunningAs running_as
, Manager
**m
);
253 void manager_free(Manager
*m
);
255 int manager_enumerate(Manager
*m
);
256 int manager_coldplug(Manager
*m
);
257 int manager_startup(Manager
*m
, FILE *serialization
, FDSet
*fds
);
259 Job
*manager_get_job(Manager
*m
, uint32_t id
);
260 Unit
*manager_get_unit(Manager
*m
, const char *name
);
262 int manager_get_job_from_dbus_path(Manager
*m
, const char *s
, Job
**_j
);
264 int manager_load_unit_prepare(Manager
*m
, const char *name
, const char *path
, DBusError
*e
, Unit
**_ret
);
265 int manager_load_unit(Manager
*m
, const char *name
, const char *path
, DBusError
*e
, Unit
**_ret
);
266 int manager_load_unit_from_dbus_path(Manager
*m
, const char *s
, DBusError
*e
, Unit
**_u
);
268 int manager_add_job(Manager
*m
, JobType type
, Unit
*unit
, JobMode mode
, bool force
, DBusError
*e
, Job
**_ret
);
269 int manager_add_job_by_name(Manager
*m
, JobType type
, const char *name
, JobMode mode
, bool force
, DBusError
*e
, Job
**_ret
);
271 void manager_dump_units(Manager
*s
, FILE *f
, const char *prefix
);
272 void manager_dump_jobs(Manager
*s
, FILE *f
, const char *prefix
);
274 void manager_clear_jobs(Manager
*m
);
276 unsigned manager_dispatch_load_queue(Manager
*m
);
277 unsigned manager_dispatch_run_queue(Manager
*m
);
278 unsigned manager_dispatch_dbus_queue(Manager
*m
);
280 int manager_set_default_environment(Manager
*m
, char **environment
);
281 int manager_set_default_rlimits(Manager
*m
, struct rlimit
**default_rlimit
);
283 int manager_loop(Manager
*m
);
285 void manager_dispatch_bus_name_owner_changed(Manager
*m
, const char *name
, const char* old_owner
, const char *new_owner
);
286 void manager_dispatch_bus_query_pid_done(Manager
*m
, const char *name
, pid_t pid
);
288 int manager_open_serialization(Manager
*m
, FILE **_f
);
290 int manager_serialize(Manager
*m
, FILE *f
, FDSet
*fds
, bool switching_root
);
291 int manager_deserialize(Manager
*m
, FILE *f
, FDSet
*fds
);
292 int manager_distribute_fds(Manager
*m
, FDSet
*fds
);
294 int manager_reload(Manager
*m
);
296 bool manager_is_reloading_or_reexecuting(Manager
*m
) _pure_
;
298 void manager_reset_failed(Manager
*m
);
300 void manager_send_unit_audit(Manager
*m
, Unit
*u
, int type
, bool success
);
301 void manager_send_unit_plymouth(Manager
*m
, Unit
*u
);
303 bool manager_unit_inactive_or_pending(Manager
*m
, const char *name
);
305 void manager_check_finished(Manager
*m
);
307 void manager_run_generators(Manager
*m
);
308 void manager_undo_generators(Manager
*m
);
310 void manager_recheck_journal(Manager
*m
);
312 void manager_set_show_status(Manager
*m
, bool b
);
313 void manager_status_printf(Manager
*m
, bool ephemeral
, const char *status
, const char *format
, ...) _printf_attr_(4,5);
315 void watch_init(Watch
*w
);