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;
154 char *generator_unit_path;
155 char *generator_unit_path_early;
156 char *generator_unit_path_late;
158 /* Data specific to the device subsystem */
160 struct udev_monitor* udev_monitor;
162 Hashmap *devices_by_sysfs;
164 /* Data specific to the mount subsystem */
165 FILE *proc_self_mountinfo;
168 /* Data specific to the swap filesystem */
170 Hashmap *swaps_by_proc_swaps;
174 /* Data specific to the D-Bus subsystem */
175 DBusConnection *api_bus, *system_bus;
176 DBusServer *private_bus;
177 Set *bus_connections, *bus_connections_for_dispatch;
179 DBusMessage *queued_message; /* This is used during reloading:
180 * before the reload we queue the
181 * reply message here, and
182 * afterwards we send it */
183 DBusConnection *queued_message_connection; /* The connection to send the queued message on */
185 Hashmap *watch_bus; /* D-Bus names => Unit object n:1 */
186 int32_t name_data_slot;
187 int32_t conn_data_slot;
188 int32_t subscribed_data_slot;
190 uint32_t current_job_id;
191 uint32_t default_unit_job_id;
193 /* Data specific to the Automount subsystem */
196 /* Data specific to the cgroup subsystem */
197 Hashmap *cgroup_bondings; /* path string => CGroupBonding object 1:n */
198 char *cgroup_hierarchy;
200 usec_t gc_queue_timestamp;
202 unsigned n_in_gc_queue;
204 /* Make sure the user cannot accidentally unmount our cgroup
209 SystemdRunningAs running_as;
210 ManagerExitCode exit_code:5;
212 bool dispatching_load_queue:1;
213 bool dispatching_run_queue:1;
214 bool dispatching_dbus_queue:1;
221 ExecOutput default_std_output, default_std_error;
223 struct rlimit *rlimit[RLIMIT_NLIMITS];
225 /* non-zero if we are reloading or reexecuting, */
228 unsigned n_installed_jobs;
229 unsigned n_failed_jobs;
231 /* Jobs in progress watching */
232 unsigned n_running_jobs;
233 unsigned n_on_console;
234 unsigned jobs_in_progress_iteration;
236 /* Type=idle pipes */
240 char *switch_root_init;
243 int manager_new(SystemdRunningAs running_as, Manager **m);
244 void manager_free(Manager *m);
246 int manager_enumerate(Manager *m);
247 int manager_coldplug(Manager *m);
248 int manager_startup(Manager *m, FILE *serialization, FDSet *fds);
250 Job *manager_get_job(Manager *m, uint32_t id);
251 Unit *manager_get_unit(Manager *m, const char *name);
253 int manager_get_job_from_dbus_path(Manager *m, const char *s, Job **_j);
255 int manager_load_unit_prepare(Manager *m, const char *name, const char *path, DBusError *e, Unit **_ret);
256 int manager_load_unit(Manager *m, const char *name, const char *path, DBusError *e, Unit **_ret);
257 int manager_load_unit_from_dbus_path(Manager *m, const char *s, DBusError *e, Unit **_u);
259 int manager_add_job(Manager *m, JobType type, Unit *unit, JobMode mode, bool force, DBusError *e, Job **_ret);
260 int manager_add_job_by_name(Manager *m, JobType type, const char *name, JobMode mode, bool force, DBusError *e, Job **_ret);
262 void manager_dump_units(Manager *s, FILE *f, const char *prefix);
263 void manager_dump_jobs(Manager *s, FILE *f, const char *prefix);
265 void manager_clear_jobs(Manager *m);
267 unsigned manager_dispatch_load_queue(Manager *m);
268 unsigned manager_dispatch_run_queue(Manager *m);
269 unsigned manager_dispatch_dbus_queue(Manager *m);
271 int manager_set_default_controllers(Manager *m, char **controllers);
272 int manager_set_default_rlimits(Manager *m, struct rlimit **default_rlimit);
274 int manager_loop(Manager *m);
276 void manager_dispatch_bus_name_owner_changed(Manager *m, const char *name, const char* old_owner, const char *new_owner);
277 void manager_dispatch_bus_query_pid_done(Manager *m, const char *name, pid_t pid);
279 int manager_open_serialization(Manager *m, FILE **_f);
281 int manager_serialize(Manager *m, FILE *f, FDSet *fds, bool switching_root);
282 int manager_deserialize(Manager *m, FILE *f, FDSet *fds);
283 int manager_distribute_fds(Manager *m, FDSet *fds);
285 int manager_reload(Manager *m);
287 bool manager_is_reloading_or_reexecuting(Manager *m) _pure_;
289 void manager_reset_failed(Manager *m);
291 void manager_send_unit_audit(Manager *m, Unit *u, int type, bool success);
292 void manager_send_unit_plymouth(Manager *m, Unit *u);
294 bool manager_unit_inactive_or_pending(Manager *m, const char *name);
296 void manager_check_finished(Manager *m);
298 void manager_run_generators(Manager *m);
299 void manager_undo_generators(Manager *m);
301 void manager_recheck_journal(Manager *m);
303 void manager_set_show_status(Manager *m, bool b);
304 void manager_status_printf(Manager *m, bool ephemeral, const char *status, const char *format, ...) _printf_attr_(4,5);
306 void watch_init(Watch *w);