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1 | /*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/ | |
2 | ||
3 | #ifndef foomanagerhfoo | |
4 | #define foomanagerhfoo | |
5 | ||
6 | /*** | |
7 | This file is part of systemd. | |
8 | ||
9 | Copyright 2010 Lennart Poettering | |
10 | ||
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. | |
15 | ||
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. | |
20 | ||
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/>. | |
23 | ***/ | |
24 | ||
25 | #include <stdbool.h> | |
26 | #include <inttypes.h> | |
27 | #include <stdio.h> | |
28 | #include <dbus/dbus.h> | |
29 | ||
30 | #include "fdset.h" | |
31 | ||
32 | /* Enforce upper limit how many names we allow */ | |
33 | #define MANAGER_MAX_NAMES 2048 | |
34 | ||
35 | typedef struct Manager Manager; | |
36 | typedef enum WatchType WatchType; | |
37 | typedef struct Watch Watch; | |
38 | ||
39 | typedef enum ManagerExitCode { | |
40 | MANAGER_RUNNING, | |
41 | MANAGER_EXIT, | |
42 | MANAGER_RELOAD, | |
43 | MANAGER_REEXECUTE, | |
44 | _MANAGER_EXIT_CODE_MAX, | |
45 | _MANAGER_EXIT_CODE_INVALID = -1 | |
46 | } ManagerExitCode; | |
47 | ||
48 | typedef enum ManagerRunningAs { | |
49 | MANAGER_SYSTEM, | |
50 | MANAGER_SESSION, | |
51 | _MANAGER_RUNNING_AS_MAX, | |
52 | _MANAGER_RUNNING_AS_INVALID = -1 | |
53 | } ManagerRunningAs; | |
54 | ||
55 | enum WatchType { | |
56 | WATCH_INVALID, | |
57 | WATCH_SIGNAL, | |
58 | WATCH_NOTIFY, | |
59 | WATCH_FD, | |
60 | WATCH_UNIT_TIMER, | |
61 | WATCH_JOB_TIMER, | |
62 | WATCH_MOUNT, | |
63 | WATCH_UDEV, | |
64 | WATCH_DBUS_WATCH, | |
65 | WATCH_DBUS_TIMEOUT | |
66 | }; | |
67 | ||
68 | struct Watch { | |
69 | int fd; | |
70 | WatchType type; | |
71 | union { | |
72 | union Unit *unit; | |
73 | struct Job *job; | |
74 | DBusWatch *bus_watch; | |
75 | DBusTimeout *bus_timeout; | |
76 | } data; | |
77 | bool fd_is_dupped:1; | |
78 | bool socket_accept:1; | |
79 | }; | |
80 | ||
81 | #include "unit.h" | |
82 | #include "job.h" | |
83 | #include "hashmap.h" | |
84 | #include "list.h" | |
85 | #include "set.h" | |
86 | #include "dbus.h" | |
87 | #include "path-lookup.h" | |
88 | ||
89 | struct Manager { | |
90 | /* Note that the set of units we know of is allowed to be | |
91 | * incosistent. However the subset of it that is loaded may | |
92 | * not, and the list of jobs may neither. */ | |
93 | ||
94 | /* Active jobs and units */ | |
95 | Hashmap *units; /* name string => Unit object n:1 */ | |
96 | Hashmap *jobs; /* job id => Job object 1:1 */ | |
97 | ||
98 | /* To make it easy to iterate through the units of a specific | |
99 | * type we maintain a per type linked list */ | |
100 | LIST_HEAD(Meta, units_per_type[_UNIT_TYPE_MAX]); | |
101 | ||
102 | /* Units that need to be loaded */ | |
103 | LIST_HEAD(Meta, load_queue); /* this is actually more a stack than a queue, but uh. */ | |
104 | ||
105 | /* Jobs that need to be run */ | |
106 | LIST_HEAD(Job, run_queue); /* more a stack than a queue, too */ | |
107 | ||
108 | /* Units and jobs that have not yet been announced via | |
109 | * D-Bus. When something about a job changes it is added here | |
110 | * if it is not in there yet. This allows easy coalescing of | |
111 | * D-Bus change signals. */ | |
112 | LIST_HEAD(Meta, dbus_unit_queue); | |
113 | LIST_HEAD(Job, dbus_job_queue); | |
114 | ||
115 | /* Units to remove */ | |
116 | LIST_HEAD(Meta, cleanup_queue); | |
117 | ||
118 | /* Units to check when doing GC */ | |
119 | LIST_HEAD(Meta, gc_queue); | |
120 | ||
121 | /* Jobs to be added */ | |
122 | Hashmap *transaction_jobs; /* Unit object => Job object list 1:1 */ | |
123 | JobDependency *transaction_anchor; | |
124 | ||
125 | Hashmap *watch_pids; /* pid => Unit object n:1 */ | |
126 | ||
127 | char *notify_socket; | |
128 | ||
129 | Watch notify_watch; | |
130 | Watch signal_watch; | |
131 | ||
132 | int epoll_fd; | |
133 | ||
134 | unsigned n_snapshots; | |
135 | ||
136 | LookupPaths lookup_paths; | |
137 | Set *unit_path_cache; | |
138 | ||
139 | char **environment; | |
140 | ||
141 | dual_timestamp startup_timestamp; | |
142 | dual_timestamp finish_timestamp; | |
143 | ||
144 | char *console; | |
145 | ||
146 | /* Data specific to the device subsystem */ | |
147 | struct udev* udev; | |
148 | struct udev_monitor* udev_monitor; | |
149 | Watch udev_watch; | |
150 | Hashmap *devices_by_sysfs; | |
151 | ||
152 | /* Data specific to the mount subsystem */ | |
153 | FILE *proc_self_mountinfo; | |
154 | Watch mount_watch; | |
155 | ||
156 | /* Data specific to the swap filesystem */ | |
157 | FILE *proc_swaps; | |
158 | ||
159 | /* Data specific to the D-Bus subsystem */ | |
160 | DBusConnection *api_bus, *system_bus; | |
161 | DBusServer *private_bus; | |
162 | Set *bus_connections, *bus_connections_for_dispatch; | |
163 | ||
164 | DBusMessage *queued_message; /* This is used during reloading: | |
165 | * before the reload we queue the | |
166 | * reply message here, and | |
167 | * afterwards we send it */ | |
168 | DBusConnection *queued_message_connection; /* The connection to send the queued message on */ | |
169 | ||
170 | Hashmap *watch_bus; /* D-Bus names => Unit object n:1 */ | |
171 | int32_t name_data_slot; | |
172 | int32_t subscribed_data_slot; | |
173 | ||
174 | uint32_t current_job_id; | |
175 | ||
176 | /* Data specific to the Automount subsystem */ | |
177 | int dev_autofs_fd; | |
178 | ||
179 | /* Data specific to the cgroup subsystem */ | |
180 | Hashmap *cgroup_bondings; /* path string => CGroupBonding object 1:n */ | |
181 | char *cgroup_hierarchy; | |
182 | ||
183 | usec_t gc_queue_timestamp; | |
184 | int gc_marker; | |
185 | unsigned n_in_gc_queue; | |
186 | ||
187 | /* Make sure the user cannot accidentaly unmount our cgroup | |
188 | * file system */ | |
189 | int pin_cgroupfs_fd; | |
190 | ||
191 | /* Audit fd */ | |
192 | #ifdef HAVE_AUDIT | |
193 | int audit_fd; | |
194 | #endif | |
195 | ||
196 | /* Flags */ | |
197 | ManagerRunningAs running_as; | |
198 | ManagerExitCode exit_code:4; | |
199 | ||
200 | bool dispatching_load_queue:1; | |
201 | bool dispatching_run_queue:1; | |
202 | bool dispatching_dbus_queue:1; | |
203 | ||
204 | bool show_status; | |
205 | bool confirm_spawn; | |
206 | #ifdef HAVE_SYSV_COMPAT | |
207 | bool sysv_console; | |
208 | #endif | |
209 | bool mount_auto; | |
210 | bool swap_auto; | |
211 | ||
212 | int n_deserializing; | |
213 | ||
214 | unsigned n_installed_jobs; | |
215 | unsigned n_failed_jobs; | |
216 | }; | |
217 | ||
218 | int manager_new(ManagerRunningAs running_as, Manager **m); | |
219 | void manager_free(Manager *m); | |
220 | ||
221 | int manager_enumerate(Manager *m); | |
222 | int manager_coldplug(Manager *m); | |
223 | int manager_startup(Manager *m, FILE *serialization, FDSet *fds); | |
224 | ||
225 | Job *manager_get_job(Manager *m, uint32_t id); | |
226 | Unit *manager_get_unit(Manager *m, const char *name); | |
227 | ||
228 | int manager_get_unit_from_dbus_path(Manager *m, const char *s, Unit **_u); | |
229 | int manager_get_job_from_dbus_path(Manager *m, const char *s, Job **_j); | |
230 | ||
231 | int manager_load_unit_prepare(Manager *m, const char *name, const char *path, DBusError *e, Unit **_ret); | |
232 | int manager_load_unit(Manager *m, const char *name, const char *path, DBusError *e, Unit **_ret); | |
233 | ||
234 | int manager_add_job(Manager *m, JobType type, Unit *unit, JobMode mode, bool force, DBusError *e, Job **_ret); | |
235 | int manager_add_job_by_name(Manager *m, JobType type, const char *name, JobMode mode, bool force, DBusError *e, Job **_ret); | |
236 | ||
237 | void manager_dump_units(Manager *s, FILE *f, const char *prefix); | |
238 | void manager_dump_jobs(Manager *s, FILE *f, const char *prefix); | |
239 | ||
240 | void manager_transaction_unlink_job(Manager *m, Job *j, bool delete_dependencies); | |
241 | ||
242 | void manager_clear_jobs(Manager *m); | |
243 | ||
244 | unsigned manager_dispatch_load_queue(Manager *m); | |
245 | unsigned manager_dispatch_run_queue(Manager *m); | |
246 | unsigned manager_dispatch_dbus_queue(Manager *m); | |
247 | ||
248 | int manager_set_console(Manager *m, const char *console); | |
249 | ||
250 | int manager_loop(Manager *m); | |
251 | ||
252 | void manager_dispatch_bus_name_owner_changed(Manager *m, const char *name, const char* old_owner, const char *new_owner); | |
253 | void manager_dispatch_bus_query_pid_done(Manager *m, const char *name, pid_t pid); | |
254 | ||
255 | int manager_open_serialization(Manager *m, FILE **_f); | |
256 | ||
257 | int manager_serialize(Manager *m, FILE *f, FDSet *fds); | |
258 | int manager_deserialize(Manager *m, FILE *f, FDSet *fds); | |
259 | ||
260 | int manager_reload(Manager *m); | |
261 | ||
262 | bool manager_is_booting_or_shutting_down(Manager *m); | |
263 | ||
264 | void manager_reset_failed(Manager *m); | |
265 | ||
266 | void manager_send_unit_audit(Manager *m, Unit *u, int type, bool success); | |
267 | ||
268 | bool manager_unit_pending_inactive(Manager *m, const char *name); | |
269 | ||
270 | void manager_check_finished(Manager *m); | |
271 | ||
272 | const char *manager_running_as_to_string(ManagerRunningAs i); | |
273 | ManagerRunningAs manager_running_as_from_string(const char *s); | |
274 | ||
275 | #endif |