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1 | /*-*- Mode: C; c-basic-offset: 8 -*-*/ | |
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_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 | |
54 | } ManagerRunningAs; | |
55 | ||
56 | enum WatchType { | |
57 | WATCH_INVALID, | |
58 | WATCH_SIGNAL, | |
59 | WATCH_FD, | |
60 | WATCH_TIMER, | |
61 | WATCH_MOUNT, | |
62 | WATCH_UDEV, | |
63 | WATCH_DBUS_WATCH, | |
64 | WATCH_DBUS_TIMEOUT | |
65 | }; | |
66 | ||
67 | struct Watch { | |
68 | int fd; | |
69 | WatchType type; | |
70 | union { | |
71 | union Unit *unit; | |
72 | DBusWatch *bus_watch; | |
73 | DBusTimeout *bus_timeout; | |
74 | } data; | |
75 | bool fd_is_dupped:1; | |
76 | bool socket_accept:1; | |
77 | }; | |
78 | ||
79 | #include "unit.h" | |
80 | #include "job.h" | |
81 | #include "hashmap.h" | |
82 | #include "list.h" | |
83 | #include "set.h" | |
84 | #include "dbus.h" | |
85 | ||
86 | #define SPECIAL_DEFAULT_TARGET "default.target" | |
87 | ||
88 | /* This is not really intended to be started by directly. This is | |
89 | * mostly so that other targets (reboot/halt/poweroff) can depend on | |
90 | * it to bring all services down that want to be brought down on | |
91 | * system shutdown. */ | |
92 | #define SPECIAL_SHUTDOWN_TARGET "shutdown.target" | |
93 | ||
94 | #define SPECIAL_LOGGER_SOCKET "systemd-logger.socket" | |
95 | ||
96 | #define SPECIAL_KBREQUEST_TARGET "kbrequest.target" | |
97 | #define SPECIAL_SIGPWR_TARGET "sigpwr.target" | |
98 | #define SPECIAL_CTRL_ALT_DEL_TARGET "ctrl-alt-del.target" | |
99 | ||
100 | #define SPECIAL_LOCAL_FS_TARGET "local-fs.target" | |
101 | #define SPECIAL_REMOTE_FS_TARGET "remote-fs.target" | |
102 | #define SPECIAL_SWAP_TARGET "swap.target" | |
103 | #define SPECIAL_NETWORK_TARGET "network.target" | |
104 | #define SPECIAL_NSS_LOOKUP_TARGET "nss-lookup.target" /* LSB's $named */ | |
105 | #define SPECIAL_RPCBIND_TARGET "rpcbind.target" /* LSB's $portmap */ | |
106 | #define SPECIAL_SYSLOG_TARGET "syslog.target" /* Should pull in syslog.socket or syslog.service */ | |
107 | #define SPECIAL_RTC_SET_TARGET "rtc-set.target" /* LSB's $time */ | |
108 | ||
109 | #define SPECIAL_BASIC_TARGET "basic.target" | |
110 | #define SPECIAL_RESCUE_TARGET "rescue.target" | |
111 | ||
112 | #ifndef SPECIAL_DBUS_SERVICE | |
113 | #define SPECIAL_DBUS_SERVICE "dbus.service" | |
114 | #endif | |
115 | ||
116 | #ifndef SPECIAL_SYSLOG_SERVICE | |
117 | #define SPECIAL_SYSLOG_SERVICE "syslog.service" | |
118 | #endif | |
119 | ||
120 | /* For SysV compatibility. Usually an alias for a saner target. On | |
121 | * SysV-free systems this doesn't exist. */ | |
122 | #define SPECIAL_RUNLEVEL0_TARGET "runlevel0.target" | |
123 | #define SPECIAL_RUNLEVEL1_TARGET "runlevel1.target" | |
124 | #define SPECIAL_RUNLEVEL2_TARGET "runlevel2.target" | |
125 | #define SPECIAL_RUNLEVEL3_TARGET "runlevel3.target" | |
126 | #define SPECIAL_RUNLEVEL4_TARGET "runlevel4.target" | |
127 | #define SPECIAL_RUNLEVEL5_TARGET "runlevel5.target" | |
128 | #define SPECIAL_RUNLEVEL6_TARGET "runlevel6.target" | |
129 | ||
130 | struct Manager { | |
131 | uint32_t current_job_id; | |
132 | ||
133 | /* Note that the set of units we know of is allowed to be | |
134 | * incosistent. However the subset of it that is loaded may | |
135 | * not, and the list of jobs may neither. */ | |
136 | ||
137 | /* Active jobs and units */ | |
138 | Hashmap *units; /* name string => Unit object n:1 */ | |
139 | Hashmap *jobs; /* job id => Job object 1:1 */ | |
140 | ||
141 | /* To make it easy to iterate through the units of a specific | |
142 | * type we maintain a per type linked list */ | |
143 | LIST_HEAD(Meta, units_per_type[_UNIT_TYPE_MAX]); | |
144 | ||
145 | /* Units that need to be loaded */ | |
146 | LIST_HEAD(Meta, load_queue); /* this is actually more a stack than a queue, but uh. */ | |
147 | ||
148 | /* Jobs that need to be run */ | |
149 | LIST_HEAD(Job, run_queue); /* more a stack than a queue, too */ | |
150 | ||
151 | /* Units and jobs that have not yet been announced via | |
152 | * D-Bus. When something about a job changes it is added here | |
153 | * if it is not in there yet. This allows easy coalescing of | |
154 | * D-Bus change signals. */ | |
155 | LIST_HEAD(Meta, dbus_unit_queue); | |
156 | LIST_HEAD(Job, dbus_job_queue); | |
157 | ||
158 | /* Units to remove */ | |
159 | LIST_HEAD(Meta, cleanup_queue); | |
160 | ||
161 | /* Units to check when doing GC */ | |
162 | LIST_HEAD(Meta, gc_queue); | |
163 | ||
164 | /* Jobs to be added */ | |
165 | Hashmap *transaction_jobs; /* Unit object => Job object list 1:1 */ | |
166 | JobDependency *transaction_anchor; | |
167 | ||
168 | Hashmap *watch_pids; /* pid => Unit object n:1 */ | |
169 | ||
170 | Watch signal_watch; | |
171 | ||
172 | int epoll_fd; | |
173 | ||
174 | unsigned n_snapshots; | |
175 | ||
176 | char **unit_path; | |
177 | char **sysvinit_path; | |
178 | char **sysvrcnd_path; | |
179 | ||
180 | char **environment; | |
181 | ||
182 | usec_t boot_timestamp; | |
183 | ||
184 | /* Data specific to the device subsystem */ | |
185 | struct udev* udev; | |
186 | struct udev_monitor* udev_monitor; | |
187 | Watch udev_watch; | |
188 | ||
189 | /* Data specific to the mount subsystem */ | |
190 | FILE *proc_self_mountinfo; | |
191 | Watch mount_watch; | |
192 | ||
193 | /* Data specific to the swap filesystem */ | |
194 | FILE *proc_swaps; | |
195 | ||
196 | /* Data specific to the D-Bus subsystem */ | |
197 | DBusConnection *api_bus, *system_bus; | |
198 | Set *subscribed; | |
199 | DBusMessage *queued_message; /* This is used during reloading: | |
200 | * before the reload we queue the | |
201 | * reply message here, and | |
202 | * afterwards we send it */ | |
203 | ||
204 | Hashmap *watch_bus; /* D-Bus names => Unit object n:1 */ | |
205 | int32_t name_data_slot; | |
206 | ||
207 | /* Data specific to the Automount subsystem */ | |
208 | int dev_autofs_fd; | |
209 | ||
210 | /* Data specific to the cgroup subsystem */ | |
211 | Hashmap *cgroup_bondings; /* path string => CGroupBonding object 1:n */ | |
212 | char *cgroup_controller; | |
213 | char *cgroup_hierarchy; | |
214 | ||
215 | usec_t gc_queue_timestamp; | |
216 | ||
217 | int gc_marker; | |
218 | unsigned n_in_gc_queue; | |
219 | ||
220 | /* Flags */ | |
221 | ManagerRunningAs running_as; | |
222 | ManagerExitCode exit_code:4; | |
223 | ||
224 | bool dispatching_load_queue:1; | |
225 | bool dispatching_run_queue:1; | |
226 | bool dispatching_dbus_queue:1; | |
227 | ||
228 | bool request_api_bus_dispatch:1; | |
229 | bool request_system_bus_dispatch:1; | |
230 | ||
231 | bool utmp_reboot_written:1; | |
232 | ||
233 | bool confirm_spawn:1; | |
234 | }; | |
235 | ||
236 | int manager_new(ManagerRunningAs running_as, bool confirm_spawn, Manager **m); | |
237 | void manager_free(Manager *m); | |
238 | ||
239 | int manager_enumerate(Manager *m); | |
240 | int manager_coldplug(Manager *m); | |
241 | int manager_startup(Manager *m, FILE *serialization, FDSet *fds); | |
242 | ||
243 | Job *manager_get_job(Manager *m, uint32_t id); | |
244 | Unit *manager_get_unit(Manager *m, const char *name); | |
245 | ||
246 | int manager_get_unit_from_dbus_path(Manager *m, const char *s, Unit **_u); | |
247 | int manager_get_job_from_dbus_path(Manager *m, const char *s, Job **_j); | |
248 | ||
249 | int manager_load_unit_prepare(Manager *m, const char *name, const char *path, Unit **_ret); | |
250 | int manager_load_unit(Manager *m, const char *name, const char *path, Unit **_ret); | |
251 | ||
252 | int manager_add_job(Manager *m, JobType type, Unit *unit, JobMode mode, bool force, Job **_ret); | |
253 | int manager_add_job_by_name(Manager *m, JobType type, const char *name, JobMode mode, bool force, Job **_ret); | |
254 | ||
255 | void manager_dump_units(Manager *s, FILE *f, const char *prefix); | |
256 | void manager_dump_jobs(Manager *s, FILE *f, const char *prefix); | |
257 | ||
258 | void manager_transaction_unlink_job(Manager *m, Job *j, bool delete_dependencies); | |
259 | ||
260 | void manager_clear_jobs(Manager *m); | |
261 | ||
262 | unsigned manager_dispatch_load_queue(Manager *m); | |
263 | unsigned manager_dispatch_run_queue(Manager *m); | |
264 | unsigned manager_dispatch_dbus_queue(Manager *m); | |
265 | ||
266 | int manager_loop(Manager *m); | |
267 | ||
268 | void manager_write_utmp_reboot(Manager *m); | |
269 | void manager_write_utmp_runlevel(Manager *m, Unit *t); | |
270 | ||
271 | void manager_dispatch_bus_name_owner_changed(Manager *m, const char *name, const char* old_owner, const char *new_owner); | |
272 | void manager_dispatch_bus_query_pid_done(Manager *m, const char *name, pid_t pid); | |
273 | ||
274 | int manager_open_serialization(FILE **_f); | |
275 | ||
276 | int manager_serialize(Manager *m, FILE *f, FDSet *fds); | |
277 | int manager_deserialize(Manager *m, FILE *f, FDSet *fds); | |
278 | ||
279 | int manager_reload(Manager *m); | |
280 | ||
281 | const char *manager_running_as_to_string(ManagerRunningAs i); | |
282 | ManagerRunningAs manager_running_as_from_string(const char *s); | |
283 | ||
284 | #endif |