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d6c9574f | 1 | /*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/ |
ea430986 | 2 | |
a7334b09 LP |
3 | /*** |
4 | This file is part of systemd. | |
5 | ||
6 | Copyright 2010 Lennart Poettering | |
7 | ||
8 | systemd is free software; you can redistribute it and/or modify it | |
5430f7f2 LP |
9 | under the terms of the GNU Lesser General Public License as published by |
10 | the Free Software Foundation; either version 2.1 of the License, or | |
a7334b09 LP |
11 | (at your option) any later version. |
12 | ||
13 | systemd is distributed in the hope that it will be useful, but | |
14 | WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
5430f7f2 | 16 | Lesser General Public License for more details. |
a7334b09 | 17 | |
5430f7f2 | 18 | You should have received a copy of the GNU Lesser General Public License |
a7334b09 LP |
19 | along with systemd; If not, see <http://www.gnu.org/licenses/>. |
20 | ***/ | |
21 | ||
ea430986 LP |
22 | #include <sys/epoll.h> |
23 | #include <sys/timerfd.h> | |
24 | #include <errno.h> | |
25 | #include <unistd.h> | |
4139c1b2 | 26 | #include <dbus/dbus.h> |
ea430986 LP |
27 | |
28 | #include "dbus.h" | |
29 | #include "log.h" | |
30 | #include "strv.h" | |
8e274523 | 31 | #include "cgroup.h" |
49e942b2 | 32 | #include "mkdir.h" |
4139c1b2 LP |
33 | #include "dbus-unit.h" |
34 | #include "dbus-job.h" | |
35 | #include "dbus-manager.h" | |
4288f619 LP |
36 | #include "dbus-service.h" |
37 | #include "dbus-socket.h" | |
38 | #include "dbus-target.h" | |
39 | #include "dbus-device.h" | |
40 | #include "dbus-mount.h" | |
41 | #include "dbus-automount.h" | |
42 | #include "dbus-snapshot.h" | |
43 | #include "dbus-swap.h" | |
871d7de4 | 44 | #include "dbus-timer.h" |
01f78473 | 45 | #include "dbus-path.h" |
398ef8ba | 46 | #include "bus-errors.h" |
8f6df3fa | 47 | #include "special.h" |
bfebab7f | 48 | #include "dbus-common.h" |
4288f619 | 49 | |
5e8d1c9a LP |
50 | #define CONNECTIONS_MAX 52 |
51 | ||
cbd37330 MS |
52 | /* Well-known address (http://dbus.freedesktop.org/doc/dbus-specification.html#message-bus-types) */ |
53 | #define DBUS_SYSTEM_BUS_DEFAULT_ADDRESS "unix:path=/var/run/dbus/system_bus_socket" | |
54 | /* Only used as a fallback */ | |
55 | #define DBUS_SESSION_BUS_DEFAULT_ADDRESS "autolaunch:" | |
56 | ||
4288f619 LP |
57 | static const char bus_properties_interface[] = BUS_PROPERTIES_INTERFACE; |
58 | static const char bus_introspectable_interface[] = BUS_INTROSPECTABLE_INTERFACE; | |
59 | ||
60 | const char *const bus_interface_table[] = { | |
61 | "org.freedesktop.DBus.Properties", bus_properties_interface, | |
62 | "org.freedesktop.DBus.Introspectable", bus_introspectable_interface, | |
63 | "org.freedesktop.systemd1.Manager", bus_manager_interface, | |
64 | "org.freedesktop.systemd1.Job", bus_job_interface, | |
65 | "org.freedesktop.systemd1.Unit", bus_unit_interface, | |
66 | "org.freedesktop.systemd1.Service", bus_service_interface, | |
67 | "org.freedesktop.systemd1.Socket", bus_socket_interface, | |
68 | "org.freedesktop.systemd1.Target", bus_target_interface, | |
69 | "org.freedesktop.systemd1.Device", bus_device_interface, | |
70 | "org.freedesktop.systemd1.Mount", bus_mount_interface, | |
71 | "org.freedesktop.systemd1.Automount", bus_automount_interface, | |
72 | "org.freedesktop.systemd1.Snapshot", bus_snapshot_interface, | |
73 | "org.freedesktop.systemd1.Swap", bus_swap_interface, | |
871d7de4 | 74 | "org.freedesktop.systemd1.Timer", bus_timer_interface, |
01f78473 | 75 | "org.freedesktop.systemd1.Path", bus_path_interface, |
4288f619 LP |
76 | NULL |
77 | }; | |
ea430986 | 78 | |
5e8d1c9a LP |
79 | static void bus_done_api(Manager *m); |
80 | static void bus_done_system(Manager *m); | |
81 | static void bus_done_private(Manager *m); | |
923f8d76 | 82 | static void shutdown_connection(Manager *m, DBusConnection *c); |
0034c15c | 83 | |
5e8d1c9a | 84 | static void bus_dispatch_status(DBusConnection *bus, DBusDispatchStatus status, void *data) { |
8e274523 LP |
85 | Manager *m = data; |
86 | ||
87 | assert(bus); | |
88 | assert(m); | |
2e317f52 | 89 | |
5e8d1c9a LP |
90 | /* We maintain two sets, one for those connections where we |
91 | * requested a dispatch, and another where we didn't. And then, | |
92 | * we move the connections between the two sets. */ | |
8e274523 | 93 | |
5e8d1c9a LP |
94 | if (status == DBUS_DISPATCH_COMPLETE) |
95 | set_move_one(m->bus_connections, m->bus_connections_for_dispatch, bus); | |
96 | else | |
97 | set_move_one(m->bus_connections_for_dispatch, m->bus_connections, bus); | |
8e274523 LP |
98 | } |
99 | ||
ea430986 LP |
100 | void bus_watch_event(Manager *m, Watch *w, int events) { |
101 | assert(m); | |
102 | assert(w); | |
103 | ||
104 | /* This is called by the event loop whenever there is | |
105 | * something happening on D-Bus' file handles. */ | |
106 | ||
8e274523 | 107 | if (!dbus_watch_get_enabled(w->data.bus_watch)) |
ea430986 LP |
108 | return; |
109 | ||
3df5bf61 | 110 | dbus_watch_handle(w->data.bus_watch, bus_events_to_flags(events)); |
ea430986 LP |
111 | } |
112 | ||
113 | static dbus_bool_t bus_add_watch(DBusWatch *bus_watch, void *data) { | |
114 | Manager *m = data; | |
115 | Watch *w; | |
116 | struct epoll_event ev; | |
117 | ||
118 | assert(bus_watch); | |
119 | assert(m); | |
120 | ||
121 | if (!(w = new0(Watch, 1))) | |
122 | return FALSE; | |
123 | ||
124 | w->fd = dbus_watch_get_unix_fd(bus_watch); | |
125 | w->type = WATCH_DBUS_WATCH; | |
126 | w->data.bus_watch = bus_watch; | |
127 | ||
128 | zero(ev); | |
129 | ev.events = bus_flags_to_events(bus_watch); | |
130 | ev.data.ptr = w; | |
131 | ||
132 | if (epoll_ctl(m->epoll_fd, EPOLL_CTL_ADD, w->fd, &ev) < 0) { | |
133 | ||
134 | if (errno != EEXIST) { | |
135 | free(w); | |
136 | return FALSE; | |
137 | } | |
138 | ||
139 | /* Hmm, bloody D-Bus creates multiple watches on the | |
140 | * same fd. epoll() does not like that. As a dirty | |
141 | * hack we simply dup() the fd and hence get a second | |
142 | * one we can safely add to the epoll(). */ | |
143 | ||
144 | if ((w->fd = dup(w->fd)) < 0) { | |
145 | free(w); | |
146 | return FALSE; | |
147 | } | |
148 | ||
149 | if (epoll_ctl(m->epoll_fd, EPOLL_CTL_ADD, w->fd, &ev) < 0) { | |
ea430986 | 150 | close_nointr_nofail(w->fd); |
da19d5c1 | 151 | free(w); |
ea430986 LP |
152 | return FALSE; |
153 | } | |
154 | ||
155 | w->fd_is_dupped = true; | |
156 | } | |
157 | ||
158 | dbus_watch_set_data(bus_watch, w, NULL); | |
159 | ||
160 | return TRUE; | |
161 | } | |
162 | ||
163 | static void bus_remove_watch(DBusWatch *bus_watch, void *data) { | |
164 | Manager *m = data; | |
165 | Watch *w; | |
166 | ||
167 | assert(bus_watch); | |
168 | assert(m); | |
169 | ||
3df5bf61 LP |
170 | w = dbus_watch_get_data(bus_watch); |
171 | if (!w) | |
ea430986 LP |
172 | return; |
173 | ||
174 | assert(w->type == WATCH_DBUS_WATCH); | |
175 | assert_se(epoll_ctl(m->epoll_fd, EPOLL_CTL_DEL, w->fd, NULL) >= 0); | |
176 | ||
177 | if (w->fd_is_dupped) | |
178 | close_nointr_nofail(w->fd); | |
179 | ||
180 | free(w); | |
181 | } | |
182 | ||
183 | static void bus_toggle_watch(DBusWatch *bus_watch, void *data) { | |
184 | Manager *m = data; | |
185 | Watch *w; | |
186 | struct epoll_event ev; | |
187 | ||
188 | assert(bus_watch); | |
189 | assert(m); | |
190 | ||
3df5bf61 LP |
191 | w = dbus_watch_get_data(bus_watch); |
192 | if (!w) | |
193 | return; | |
194 | ||
ea430986 LP |
195 | assert(w->type == WATCH_DBUS_WATCH); |
196 | ||
197 | zero(ev); | |
198 | ev.events = bus_flags_to_events(bus_watch); | |
199 | ev.data.ptr = w; | |
200 | ||
201 | assert_se(epoll_ctl(m->epoll_fd, EPOLL_CTL_MOD, w->fd, &ev) == 0); | |
202 | } | |
203 | ||
204 | static int bus_timeout_arm(Manager *m, Watch *w) { | |
205 | struct itimerspec its; | |
206 | ||
207 | assert(m); | |
208 | assert(w); | |
209 | ||
210 | zero(its); | |
211 | ||
212 | if (dbus_timeout_get_enabled(w->data.bus_timeout)) { | |
213 | timespec_store(&its.it_value, dbus_timeout_get_interval(w->data.bus_timeout) * USEC_PER_MSEC); | |
da19d5c1 | 214 | its.it_interval = its.it_value; |
ea430986 LP |
215 | } |
216 | ||
217 | if (timerfd_settime(w->fd, 0, &its, NULL) < 0) | |
218 | return -errno; | |
219 | ||
220 | return 0; | |
221 | } | |
222 | ||
223 | void bus_timeout_event(Manager *m, Watch *w, int events) { | |
224 | assert(m); | |
225 | assert(w); | |
226 | ||
227 | /* This is called by the event loop whenever there is | |
228 | * something happening on D-Bus' file handles. */ | |
229 | ||
230 | if (!(dbus_timeout_get_enabled(w->data.bus_timeout))) | |
231 | return; | |
232 | ||
233 | dbus_timeout_handle(w->data.bus_timeout); | |
234 | } | |
235 | ||
236 | static dbus_bool_t bus_add_timeout(DBusTimeout *timeout, void *data) { | |
237 | Manager *m = data; | |
238 | Watch *w; | |
239 | struct epoll_event ev; | |
240 | ||
241 | assert(timeout); | |
242 | assert(m); | |
243 | ||
244 | if (!(w = new0(Watch, 1))) | |
245 | return FALSE; | |
246 | ||
da19d5c1 | 247 | if ((w->fd = timerfd_create(CLOCK_MONOTONIC, TFD_NONBLOCK|TFD_CLOEXEC)) < 0) |
ea430986 LP |
248 | goto fail; |
249 | ||
250 | w->type = WATCH_DBUS_TIMEOUT; | |
251 | w->data.bus_timeout = timeout; | |
252 | ||
253 | if (bus_timeout_arm(m, w) < 0) | |
254 | goto fail; | |
255 | ||
256 | zero(ev); | |
257 | ev.events = EPOLLIN; | |
258 | ev.data.ptr = w; | |
259 | ||
260 | if (epoll_ctl(m->epoll_fd, EPOLL_CTL_ADD, w->fd, &ev) < 0) | |
261 | goto fail; | |
262 | ||
263 | dbus_timeout_set_data(timeout, w, NULL); | |
264 | ||
265 | return TRUE; | |
266 | ||
267 | fail: | |
268 | if (w->fd >= 0) | |
269 | close_nointr_nofail(w->fd); | |
270 | ||
271 | free(w); | |
272 | return FALSE; | |
273 | } | |
274 | ||
275 | static void bus_remove_timeout(DBusTimeout *timeout, void *data) { | |
276 | Manager *m = data; | |
277 | Watch *w; | |
278 | ||
279 | assert(timeout); | |
280 | assert(m); | |
281 | ||
3df5bf61 LP |
282 | w = dbus_timeout_get_data(timeout); |
283 | if (!w) | |
ea430986 LP |
284 | return; |
285 | ||
286 | assert(w->type == WATCH_DBUS_TIMEOUT); | |
3df5bf61 | 287 | |
ea430986 LP |
288 | assert_se(epoll_ctl(m->epoll_fd, EPOLL_CTL_DEL, w->fd, NULL) >= 0); |
289 | close_nointr_nofail(w->fd); | |
290 | free(w); | |
291 | } | |
292 | ||
293 | static void bus_toggle_timeout(DBusTimeout *timeout, void *data) { | |
294 | Manager *m = data; | |
295 | Watch *w; | |
296 | int r; | |
297 | ||
298 | assert(timeout); | |
299 | assert(m); | |
300 | ||
3df5bf61 LP |
301 | w = dbus_timeout_get_data(timeout); |
302 | if (!w) | |
303 | return; | |
304 | ||
ea430986 LP |
305 | assert(w->type == WATCH_DBUS_TIMEOUT); |
306 | ||
307 | if ((r = bus_timeout_arm(m, w)) < 0) | |
308 | log_error("Failed to rearm timer: %s", strerror(-r)); | |
309 | } | |
310 | ||
cf3e2471 | 311 | static DBusHandlerResult api_bus_message_filter(DBusConnection *connection, DBusMessage *message, void *data) { |
c1e1601e LP |
312 | Manager *m = data; |
313 | DBusError error; | |
0034c15c | 314 | DBusMessage *reply = NULL; |
c1e1601e LP |
315 | |
316 | assert(connection); | |
317 | assert(message); | |
318 | assert(m); | |
319 | ||
320 | dbus_error_init(&error); | |
321 | ||
1e001f52 LP |
322 | if (dbus_message_get_type(message) == DBUS_MESSAGE_TYPE_METHOD_CALL || |
323 | dbus_message_get_type(message) == DBUS_MESSAGE_TYPE_SIGNAL) | |
324 | log_debug("Got D-Bus request: %s.%s() on %s", | |
325 | dbus_message_get_interface(message), | |
326 | dbus_message_get_member(message), | |
327 | dbus_message_get_path(message)); | |
c1e1601e LP |
328 | |
329 | if (dbus_message_is_signal(message, DBUS_INTERFACE_LOCAL, "Disconnected")) { | |
9028d0ec | 330 | log_debug("API D-Bus connection terminated."); |
f278026d | 331 | bus_done_api(m); |
c1e1601e LP |
332 | |
333 | } else if (dbus_message_is_signal(message, DBUS_INTERFACE_DBUS, "NameOwnerChanged")) { | |
05e343b7 | 334 | const char *name, *old_owner, *new_owner; |
c1e1601e LP |
335 | |
336 | if (!dbus_message_get_args(message, &error, | |
337 | DBUS_TYPE_STRING, &name, | |
05e343b7 LP |
338 | DBUS_TYPE_STRING, &old_owner, |
339 | DBUS_TYPE_STRING, &new_owner, | |
c1e1601e | 340 | DBUS_TYPE_INVALID)) |
a2e52832 | 341 | log_error("Failed to parse NameOwnerChanged message: %s", bus_error_message(&error)); |
c1e1601e | 342 | else { |
a567261a LP |
343 | if (set_remove(BUS_CONNECTION_SUBSCRIBED(m, connection), (char*) name)) |
344 | log_debug("Subscription client vanished: %s (left: %u)", name, set_size(BUS_CONNECTION_SUBSCRIBED(m, connection))); | |
05e343b7 LP |
345 | |
346 | if (old_owner[0] == 0) | |
347 | old_owner = NULL; | |
348 | ||
349 | if (new_owner[0] == 0) | |
350 | new_owner = NULL; | |
351 | ||
352 | manager_dispatch_bus_name_owner_changed(m, name, old_owner, new_owner); | |
c1e1601e | 353 | } |
0034c15c LP |
354 | } else if (dbus_message_is_signal(message, "org.freedesktop.systemd1.Activator", "ActivationRequest")) { |
355 | const char *name; | |
356 | ||
357 | if (!dbus_message_get_args(message, &error, | |
358 | DBUS_TYPE_STRING, &name, | |
359 | DBUS_TYPE_INVALID)) | |
a2e52832 | 360 | log_error("Failed to parse ActivationRequest message: %s", bus_error_message(&error)); |
0034c15c LP |
361 | else { |
362 | int r; | |
363 | Unit *u; | |
364 | ||
46018844 LP |
365 | log_debug("Got D-Bus activation request for %s", name); |
366 | ||
8f6df3fa LP |
367 | if (manager_unit_pending_inactive(m, SPECIAL_DBUS_SERVICE) || |
368 | manager_unit_pending_inactive(m, SPECIAL_DBUS_SOCKET)) { | |
369 | r = -EADDRNOTAVAIL; | |
370 | dbus_set_error(&error, BUS_ERROR_SHUTTING_DOWN, "Refusing activation, D-Bus is shutting down."); | |
371 | } else { | |
372 | r = manager_load_unit(m, name, NULL, &error, &u); | |
0034c15c | 373 | |
ac155bb8 | 374 | if (r >= 0 && u->refuse_manual_start) |
8f6df3fa | 375 | r = -EPERM; |
0034c15c | 376 | |
8f6df3fa LP |
377 | if (r >= 0) |
378 | r = manager_add_job(m, JOB_START, u, JOB_REPLACE, true, &error, NULL); | |
379 | } | |
0034c15c LP |
380 | |
381 | if (r < 0) { | |
382 | const char *id, *text; | |
383 | ||
2a8cd298 | 384 | log_debug("D-Bus activation failed for %s: %s", name, strerror(-r)); |
af25ec12 | 385 | |
0034c15c LP |
386 | if (!(reply = dbus_message_new_signal("/org/freedesktop/systemd1", "org.freedesktop.systemd1.Activator", "ActivationFailure"))) |
387 | goto oom; | |
388 | ||
bfebab7f | 389 | id = error.name ? error.name : bus_errno_to_dbus(r); |
398ef8ba | 390 | text = bus_error(&error, r); |
0034c15c LP |
391 | |
392 | if (!dbus_message_set_destination(reply, DBUS_SERVICE_DBUS) || | |
393 | !dbus_message_append_args(reply, | |
394 | DBUS_TYPE_STRING, &name, | |
395 | DBUS_TYPE_STRING, &id, | |
396 | DBUS_TYPE_STRING, &text, | |
397 | DBUS_TYPE_INVALID)) | |
398 | goto oom; | |
399 | } | |
400 | ||
35b8ca3a | 401 | /* On success we don't do anything, the service will be spawned now */ |
0034c15c | 402 | } |
c1e1601e LP |
403 | } |
404 | ||
405 | dbus_error_free(&error); | |
0034c15c LP |
406 | |
407 | if (reply) { | |
408 | if (!dbus_connection_send(connection, reply, NULL)) | |
409 | goto oom; | |
410 | ||
411 | dbus_message_unref(reply); | |
412 | } | |
413 | ||
c1e1601e | 414 | return DBUS_HANDLER_RESULT_NOT_YET_HANDLED; |
0034c15c LP |
415 | |
416 | oom: | |
417 | if (reply) | |
418 | dbus_message_unref(reply); | |
419 | ||
420 | dbus_error_free(&error); | |
421 | ||
422 | return DBUS_HANDLER_RESULT_NEED_MEMORY; | |
c1e1601e LP |
423 | } |
424 | ||
cf3e2471 | 425 | static DBusHandlerResult system_bus_message_filter(DBusConnection *connection, DBusMessage *message, void *data) { |
8e274523 LP |
426 | Manager *m = data; |
427 | DBusError error; | |
428 | ||
429 | assert(connection); | |
430 | assert(message); | |
431 | assert(m); | |
432 | ||
433 | dbus_error_init(&error); | |
434 | ||
1e001f52 LP |
435 | if (m->api_bus != m->system_bus && |
436 | (dbus_message_get_type(message) == DBUS_MESSAGE_TYPE_METHOD_CALL || | |
437 | dbus_message_get_type(message) == DBUS_MESSAGE_TYPE_SIGNAL)) | |
438 | log_debug("Got D-Bus request on system bus: %s.%s() on %s", | |
439 | dbus_message_get_interface(message), | |
440 | dbus_message_get_member(message), | |
441 | dbus_message_get_path(message)); | |
8e274523 LP |
442 | |
443 | if (dbus_message_is_signal(message, DBUS_INTERFACE_LOCAL, "Disconnected")) { | |
91805b3b | 444 | log_debug("System D-Bus connection terminated."); |
f278026d | 445 | bus_done_system(m); |
8e274523 | 446 | |
53c6a358 LP |
447 | } else if (m->running_as != MANAGER_SYSTEM && |
448 | dbus_message_is_signal(message, "org.freedesktop.systemd1.Agent", "Released")) { | |
449 | ||
8e274523 LP |
450 | const char *cgroup; |
451 | ||
452 | if (!dbus_message_get_args(message, &error, | |
453 | DBUS_TYPE_STRING, &cgroup, | |
454 | DBUS_TYPE_INVALID)) | |
19bc719e | 455 | log_error("Failed to parse Released message: %s", bus_error_message(&error)); |
8e274523 LP |
456 | else |
457 | cgroup_notify_empty(m, cgroup); | |
458 | } | |
459 | ||
460 | dbus_error_free(&error); | |
461 | return DBUS_HANDLER_RESULT_NOT_YET_HANDLED; | |
462 | } | |
463 | ||
5e8d1c9a LP |
464 | static DBusHandlerResult private_bus_message_filter(DBusConnection *connection, DBusMessage *message, void *data) { |
465 | Manager *m = data; | |
3c661fad | 466 | DBusError error; |
5e8d1c9a LP |
467 | |
468 | assert(connection); | |
469 | assert(message); | |
470 | assert(m); | |
471 | ||
3c661fad LP |
472 | dbus_error_init(&error); |
473 | ||
1e001f52 LP |
474 | if (dbus_message_get_type(message) == DBUS_MESSAGE_TYPE_METHOD_CALL || |
475 | dbus_message_get_type(message) == DBUS_MESSAGE_TYPE_SIGNAL) | |
476 | log_debug("Got D-Bus request: %s.%s() on %s", | |
477 | dbus_message_get_interface(message), | |
478 | dbus_message_get_member(message), | |
479 | dbus_message_get_path(message)); | |
5e8d1c9a | 480 | |
923f8d76 LP |
481 | if (dbus_message_is_signal(message, DBUS_INTERFACE_LOCAL, "Disconnected")) |
482 | shutdown_connection(m, connection); | |
53c6a358 LP |
483 | else if (m->running_as == MANAGER_SYSTEM && |
484 | dbus_message_is_signal(message, "org.freedesktop.systemd1.Agent", "Released")) { | |
485 | ||
3c661fad LP |
486 | const char *cgroup; |
487 | ||
488 | if (!dbus_message_get_args(message, &error, | |
489 | DBUS_TYPE_STRING, &cgroup, | |
490 | DBUS_TYPE_INVALID)) | |
a2e52832 | 491 | log_error("Failed to parse Released message: %s", bus_error_message(&error)); |
3c661fad LP |
492 | else |
493 | cgroup_notify_empty(m, cgroup); | |
53c6a358 LP |
494 | |
495 | /* Forward the message to the system bus, so that user | |
496 | * instances are notified as well */ | |
497 | ||
498 | if (m->system_bus) | |
499 | dbus_connection_send(m->system_bus, message, NULL); | |
3c661fad LP |
500 | } |
501 | ||
502 | dbus_error_free(&error); | |
5e8d1c9a LP |
503 | |
504 | return DBUS_HANDLER_RESULT_NOT_YET_HANDLED; | |
505 | } | |
506 | ||
c1e1601e | 507 | unsigned bus_dispatch(Manager *m) { |
5e8d1c9a LP |
508 | DBusConnection *c; |
509 | ||
ea430986 LP |
510 | assert(m); |
511 | ||
a16e1123 LP |
512 | if (m->queued_message) { |
513 | /* If we cannot get rid of this message we won't | |
514 | * dispatch any D-Bus messages, so that we won't end | |
515 | * up wanting to queue another message. */ | |
516 | ||
7b97f477 LP |
517 | if (m->queued_message_connection) |
518 | if (!dbus_connection_send(m->queued_message_connection, m->queued_message, NULL)) | |
5e8d1c9a | 519 | return 0; |
a16e1123 LP |
520 | |
521 | dbus_message_unref(m->queued_message); | |
522 | m->queued_message = NULL; | |
7b97f477 | 523 | m->queued_message_connection = NULL; |
a16e1123 LP |
524 | } |
525 | ||
5e8d1c9a LP |
526 | if ((c = set_first(m->bus_connections_for_dispatch))) { |
527 | if (dbus_connection_dispatch(c) == DBUS_DISPATCH_COMPLETE) | |
528 | set_move_one(m->bus_connections, m->bus_connections_for_dispatch, c); | |
fd18e1f4 LP |
529 | |
530 | return 1; | |
531 | } | |
c1e1601e | 532 | |
8e274523 | 533 | return 0; |
ea430986 LP |
534 | } |
535 | ||
05e343b7 | 536 | static void request_name_pending_cb(DBusPendingCall *pending, void *userdata) { |
61902ea3 LP |
537 | DBusMessage *reply; |
538 | DBusError error; | |
539 | ||
540 | dbus_error_init(&error); | |
541 | ||
542 | assert_se(reply = dbus_pending_call_steal_reply(pending)); | |
543 | ||
544 | switch (dbus_message_get_type(reply)) { | |
545 | ||
546 | case DBUS_MESSAGE_TYPE_ERROR: | |
547 | ||
548 | assert_se(dbus_set_error_from_message(&error, reply)); | |
a2e52832 | 549 | log_warning("RequestName() failed: %s", bus_error_message(&error)); |
61902ea3 LP |
550 | break; |
551 | ||
552 | case DBUS_MESSAGE_TYPE_METHOD_RETURN: { | |
553 | uint32_t r; | |
554 | ||
555 | if (!dbus_message_get_args(reply, | |
556 | &error, | |
557 | DBUS_TYPE_UINT32, &r, | |
558 | DBUS_TYPE_INVALID)) { | |
a2e52832 | 559 | log_error("Failed to parse RequestName() reply: %s", bus_error_message(&error)); |
61902ea3 LP |
560 | break; |
561 | } | |
562 | ||
563 | if (r == 1) | |
564 | log_debug("Successfully acquired name."); | |
565 | else | |
566 | log_error("Name already owned."); | |
567 | ||
568 | break; | |
569 | } | |
570 | ||
571 | default: | |
572 | assert_not_reached("Invalid reply message"); | |
573 | } | |
574 | ||
575 | dbus_message_unref(reply); | |
576 | dbus_error_free(&error); | |
577 | } | |
578 | ||
ea430986 | 579 | static int request_name(Manager *m) { |
ea430986 | 580 | const char *name = "org.freedesktop.systemd1"; |
b23de6af LP |
581 | /* Allow replacing of our name, to ease implementation of |
582 | * reexecution, where we keep the old connection open until | |
583 | * after the new connection is set up and the name installed | |
584 | * to allow clients to synchronously wait for reexecution to | |
585 | * finish */ | |
586 | uint32_t flags = DBUS_NAME_FLAG_ALLOW_REPLACEMENT|DBUS_NAME_FLAG_REPLACE_EXISTING; | |
05e343b7 LP |
587 | DBusMessage *message = NULL; |
588 | DBusPendingCall *pending = NULL; | |
ea430986 LP |
589 | |
590 | if (!(message = dbus_message_new_method_call( | |
591 | DBUS_SERVICE_DBUS, | |
592 | DBUS_PATH_DBUS, | |
593 | DBUS_INTERFACE_DBUS, | |
594 | "RequestName"))) | |
05e343b7 | 595 | goto oom; |
ea430986 LP |
596 | |
597 | if (!dbus_message_append_args( | |
598 | message, | |
599 | DBUS_TYPE_STRING, &name, | |
600 | DBUS_TYPE_UINT32, &flags, | |
05e343b7 LP |
601 | DBUS_TYPE_INVALID)) |
602 | goto oom; | |
ea430986 | 603 | |
05e343b7 LP |
604 | if (!dbus_connection_send_with_reply(m->api_bus, message, &pending, -1)) |
605 | goto oom; | |
ea430986 | 606 | |
05e343b7 LP |
607 | if (!dbus_pending_call_set_notify(pending, request_name_pending_cb, m, NULL)) |
608 | goto oom; | |
ea430986 LP |
609 | |
610 | dbus_message_unref(message); | |
61902ea3 LP |
611 | dbus_pending_call_unref(pending); |
612 | ||
613 | /* We simple ask for the name and don't wait for it. Sooner or | |
614 | * later we'll have it. */ | |
615 | ||
ea430986 | 616 | return 0; |
05e343b7 LP |
617 | |
618 | oom: | |
619 | if (pending) { | |
620 | dbus_pending_call_cancel(pending); | |
621 | dbus_pending_call_unref(pending); | |
622 | } | |
623 | ||
624 | if (message) | |
625 | dbus_message_unref(message); | |
626 | ||
627 | return -ENOMEM; | |
ea430986 LP |
628 | } |
629 | ||
6dded4c7 LP |
630 | static void query_name_list_pending_cb(DBusPendingCall *pending, void *userdata) { |
631 | DBusMessage *reply; | |
632 | DBusError error; | |
633 | Manager *m = userdata; | |
634 | ||
635 | assert(m); | |
636 | ||
637 | dbus_error_init(&error); | |
638 | ||
639 | assert_se(reply = dbus_pending_call_steal_reply(pending)); | |
640 | ||
641 | switch (dbus_message_get_type(reply)) { | |
642 | ||
643 | case DBUS_MESSAGE_TYPE_ERROR: | |
644 | ||
645 | assert_se(dbus_set_error_from_message(&error, reply)); | |
a2e52832 | 646 | log_warning("ListNames() failed: %s", bus_error_message(&error)); |
6dded4c7 LP |
647 | break; |
648 | ||
649 | case DBUS_MESSAGE_TYPE_METHOD_RETURN: { | |
650 | int r; | |
651 | char **l; | |
652 | ||
653 | if ((r = bus_parse_strv(reply, &l)) < 0) | |
654 | log_warning("Failed to parse ListNames() reply: %s", strerror(-r)); | |
655 | else { | |
656 | char **t; | |
657 | ||
658 | STRV_FOREACH(t, l) | |
659 | /* This is a bit hacky, we say the | |
660 | * owner of the name is the name | |
661 | * itself, because we don't want the | |
662 | * extra traffic to figure out the | |
663 | * real owner. */ | |
664 | manager_dispatch_bus_name_owner_changed(m, *t, NULL, *t); | |
665 | ||
666 | strv_free(l); | |
667 | } | |
668 | ||
669 | break; | |
670 | } | |
671 | ||
672 | default: | |
673 | assert_not_reached("Invalid reply message"); | |
674 | } | |
675 | ||
676 | dbus_message_unref(reply); | |
677 | dbus_error_free(&error); | |
678 | } | |
679 | ||
680 | static int query_name_list(Manager *m) { | |
681 | DBusMessage *message = NULL; | |
682 | DBusPendingCall *pending = NULL; | |
683 | ||
684 | /* Asks for the currently installed bus names */ | |
685 | ||
686 | if (!(message = dbus_message_new_method_call( | |
687 | DBUS_SERVICE_DBUS, | |
688 | DBUS_PATH_DBUS, | |
689 | DBUS_INTERFACE_DBUS, | |
690 | "ListNames"))) | |
691 | goto oom; | |
692 | ||
693 | if (!dbus_connection_send_with_reply(m->api_bus, message, &pending, -1)) | |
694 | goto oom; | |
695 | ||
696 | if (!dbus_pending_call_set_notify(pending, query_name_list_pending_cb, m, NULL)) | |
697 | goto oom; | |
698 | ||
699 | dbus_message_unref(message); | |
700 | dbus_pending_call_unref(pending); | |
701 | ||
702 | /* We simple ask for the list and don't wait for it. Sooner or | |
703 | * later we'll get it. */ | |
704 | ||
705 | return 0; | |
706 | ||
707 | oom: | |
708 | if (pending) { | |
709 | dbus_pending_call_cancel(pending); | |
710 | dbus_pending_call_unref(pending); | |
711 | } | |
712 | ||
713 | if (message) | |
714 | dbus_message_unref(message); | |
715 | ||
716 | return -ENOMEM; | |
717 | } | |
718 | ||
8e274523 LP |
719 | static int bus_setup_loop(Manager *m, DBusConnection *bus) { |
720 | assert(m); | |
721 | assert(bus); | |
722 | ||
723 | dbus_connection_set_exit_on_disconnect(bus, FALSE); | |
fd18e1f4 | 724 | |
8e274523 | 725 | if (!dbus_connection_set_watch_functions(bus, bus_add_watch, bus_remove_watch, bus_toggle_watch, m, NULL) || |
5e8d1c9a LP |
726 | !dbus_connection_set_timeout_functions(bus, bus_add_timeout, bus_remove_timeout, bus_toggle_timeout, m, NULL)) { |
727 | log_error("Not enough memory"); | |
8e274523 | 728 | return -ENOMEM; |
5e8d1c9a | 729 | } |
8e274523 | 730 | |
5e8d1c9a LP |
731 | if (set_put(m->bus_connections_for_dispatch, bus) < 0) { |
732 | log_error("Not enough memory"); | |
733 | return -ENOMEM; | |
734 | } | |
735 | ||
736 | dbus_connection_set_dispatch_status_function(bus, bus_dispatch_status, m, NULL); | |
8e274523 LP |
737 | return 0; |
738 | } | |
739 | ||
be81bfc4 LP |
740 | static dbus_bool_t allow_only_same_user(DBusConnection *connection, unsigned long uid, void *data) { |
741 | return uid == 0 || uid == geteuid(); | |
5e8d1c9a LP |
742 | } |
743 | ||
744 | static void bus_new_connection( | |
745 | DBusServer *server, | |
746 | DBusConnection *new_connection, | |
747 | void *data) { | |
748 | ||
749 | Manager *m = data; | |
750 | ||
751 | assert(m); | |
752 | ||
753 | if (set_size(m->bus_connections) >= CONNECTIONS_MAX) { | |
754 | log_error("Too many concurrent connections."); | |
755 | return; | |
756 | } | |
757 | ||
be81bfc4 | 758 | dbus_connection_set_unix_user_function(new_connection, allow_only_same_user, NULL, NULL); |
5e8d1c9a LP |
759 | |
760 | if (bus_setup_loop(m, new_connection) < 0) | |
761 | return; | |
762 | ||
763 | if (!dbus_connection_register_object_path(new_connection, "/org/freedesktop/systemd1", &bus_manager_vtable, m) || | |
764 | !dbus_connection_register_fallback(new_connection, "/org/freedesktop/systemd1/unit", &bus_unit_vtable, m) || | |
765 | !dbus_connection_register_fallback(new_connection, "/org/freedesktop/systemd1/job", &bus_job_vtable, m) || | |
766 | !dbus_connection_add_filter(new_connection, private_bus_message_filter, m, NULL)) { | |
767 | log_error("Not enough memory."); | |
768 | return; | |
769 | } | |
770 | ||
771 | log_debug("Accepted connection on private bus."); | |
772 | ||
773 | dbus_connection_ref(new_connection); | |
774 | } | |
775 | ||
cbd37330 MS |
776 | static int init_registered_system_bus(Manager *m) { |
777 | char *id; | |
f278026d LP |
778 | |
779 | if (!dbus_connection_add_filter(m->system_bus, system_bus_message_filter, m, NULL)) { | |
5e8d1c9a | 780 | log_error("Not enough memory"); |
cbd37330 | 781 | return -ENOMEM; |
c1e1601e LP |
782 | } |
783 | ||
53c6a358 | 784 | if (m->running_as != MANAGER_SYSTEM) { |
cbd37330 MS |
785 | DBusError error; |
786 | ||
787 | dbus_error_init(&error); | |
788 | ||
53c6a358 LP |
789 | dbus_bus_add_match(m->system_bus, |
790 | "type='signal'," | |
791 | "interface='org.freedesktop.systemd1.Agent'," | |
792 | "member='Released'," | |
793 | "path='/org/freedesktop/systemd1/agent'", | |
794 | &error); | |
795 | ||
796 | if (dbus_error_is_set(&error)) { | |
a2e52832 | 797 | log_error("Failed to register match: %s", bus_error_message(&error)); |
cbd37330 MS |
798 | dbus_error_free(&error); |
799 | return -1; | |
53c6a358 | 800 | } |
ea430986 LP |
801 | } |
802 | ||
cbd37330 MS |
803 | log_debug("Successfully connected to system D-Bus bus %s as %s", |
804 | strnull((id = dbus_connection_get_server_id(m->system_bus))), | |
805 | strnull(dbus_bus_get_unique_name(m->system_bus))); | |
806 | dbus_free(id); | |
f278026d | 807 | |
f278026d LP |
808 | return 0; |
809 | } | |
810 | ||
cbd37330 | 811 | static int init_registered_api_bus(Manager *m) { |
f278026d LP |
812 | int r; |
813 | ||
f278026d LP |
814 | if (!dbus_connection_register_object_path(m->api_bus, "/org/freedesktop/systemd1", &bus_manager_vtable, m) || |
815 | !dbus_connection_register_fallback(m->api_bus, "/org/freedesktop/systemd1/unit", &bus_unit_vtable, m) || | |
816 | !dbus_connection_register_fallback(m->api_bus, "/org/freedesktop/systemd1/job", &bus_job_vtable, m) || | |
817 | !dbus_connection_add_filter(m->api_bus, api_bus_message_filter, m, NULL)) { | |
5e8d1c9a | 818 | log_error("Not enough memory"); |
cbd37330 | 819 | return -ENOMEM; |
f278026d LP |
820 | } |
821 | ||
0034c15c | 822 | /* Get NameOwnerChange messages */ |
f278026d | 823 | dbus_bus_add_match(m->api_bus, |
8e274523 | 824 | "type='signal'," |
f278026d LP |
825 | "sender='"DBUS_SERVICE_DBUS"'," |
826 | "interface='"DBUS_INTERFACE_DBUS"'," | |
fd0d7f7a | 827 | "member='NameOwnerChanged'," |
f278026d | 828 | "path='"DBUS_PATH_DBUS"'", |
cbd37330 | 829 | NULL); |
8e274523 | 830 | |
0034c15c LP |
831 | /* Get activation requests */ |
832 | dbus_bus_add_match(m->api_bus, | |
833 | "type='signal'," | |
834 | "sender='"DBUS_SERVICE_DBUS"'," | |
835 | "interface='org.freedesktop.systemd1.Activator'," | |
cf3e2471 | 836 | "member='ActivationRequest'," |
0034c15c | 837 | "path='"DBUS_PATH_DBUS"'", |
cbd37330 | 838 | NULL); |
0034c15c | 839 | |
cbd37330 MS |
840 | r = request_name(m); |
841 | if (r < 0) | |
842 | return r; | |
ea430986 | 843 | |
cbd37330 MS |
844 | r = query_name_list(m); |
845 | if (r < 0) | |
846 | return r; | |
6dded4c7 | 847 | |
cbd37330 | 848 | if (m->running_as == MANAGER_USER) { |
9014a8bd | 849 | char *id; |
91805b3b | 850 | log_debug("Successfully connected to API D-Bus bus %s as %s", |
9014a8bd LP |
851 | strnull((id = dbus_connection_get_server_id(m->api_bus))), |
852 | strnull(dbus_bus_get_unique_name(m->api_bus))); | |
853 | dbus_free(id); | |
cbd37330 MS |
854 | } else |
855 | log_debug("Successfully initialized API on the system bus"); | |
856 | ||
857 | return 0; | |
858 | } | |
859 | ||
860 | static void bus_register_cb(DBusPendingCall *pending, void *userdata) { | |
861 | Manager *m = userdata; | |
862 | DBusConnection **conn; | |
863 | DBusMessage *reply; | |
864 | DBusError error; | |
865 | const char *name; | |
866 | int r = 0; | |
867 | ||
868 | dbus_error_init(&error); | |
869 | ||
870 | conn = dbus_pending_call_get_data(pending, m->conn_data_slot); | |
871 | assert(conn == &m->system_bus || conn == &m->api_bus); | |
872 | ||
873 | reply = dbus_pending_call_steal_reply(pending); | |
874 | ||
875 | switch (dbus_message_get_type(reply)) { | |
876 | case DBUS_MESSAGE_TYPE_ERROR: | |
877 | assert_se(dbus_set_error_from_message(&error, reply)); | |
878 | log_warning("Failed to register to bus: %s", bus_error_message(&error)); | |
879 | r = -1; | |
880 | break; | |
881 | case DBUS_MESSAGE_TYPE_METHOD_RETURN: | |
882 | if (!dbus_message_get_args(reply, &error, | |
883 | DBUS_TYPE_STRING, &name, | |
884 | DBUS_TYPE_INVALID)) { | |
885 | log_error("Failed to parse Hello reply: %s", bus_error_message(&error)); | |
886 | r = -1; | |
887 | break; | |
888 | } | |
889 | ||
890 | log_debug("Received name %s in reply to Hello", name); | |
891 | if (!dbus_bus_set_unique_name(*conn, name)) { | |
892 | log_error("Failed to set unique name"); | |
893 | r = -1; | |
894 | break; | |
895 | } | |
896 | ||
897 | if (conn == &m->system_bus) { | |
898 | r = init_registered_system_bus(m); | |
899 | if (r == 0 && m->running_as == MANAGER_SYSTEM) | |
900 | r = init_registered_api_bus(m); | |
901 | } else | |
902 | r = init_registered_api_bus(m); | |
903 | ||
904 | break; | |
905 | default: | |
906 | assert_not_reached("Invalid reply message"); | |
907 | } | |
908 | ||
909 | dbus_message_unref(reply); | |
910 | dbus_error_free(&error); | |
911 | ||
912 | if (r < 0) { | |
913 | if (conn == &m->system_bus) { | |
914 | log_debug("Failed setting up the system bus"); | |
915 | bus_done_system(m); | |
916 | } else { | |
917 | log_debug("Failed setting up the API bus"); | |
918 | bus_done_api(m); | |
919 | } | |
920 | } | |
921 | } | |
922 | ||
923 | static int manager_bus_async_register(Manager *m, DBusConnection **conn) { | |
924 | DBusMessage *message = NULL; | |
925 | DBusPendingCall *pending = NULL; | |
926 | ||
927 | message = dbus_message_new_method_call(DBUS_SERVICE_DBUS, | |
928 | DBUS_PATH_DBUS, | |
929 | DBUS_INTERFACE_DBUS, | |
930 | "Hello"); | |
931 | if (!message) | |
932 | goto oom; | |
933 | ||
934 | if (!dbus_connection_send_with_reply(*conn, message, &pending, -1)) | |
935 | goto oom; | |
936 | ||
937 | if (!dbus_pending_call_set_data(pending, m->conn_data_slot, conn, NULL)) | |
938 | goto oom; | |
939 | ||
940 | if (!dbus_pending_call_set_notify(pending, bus_register_cb, m, NULL)) | |
941 | goto oom; | |
942 | ||
943 | dbus_message_unref(message); | |
944 | dbus_pending_call_unref(pending); | |
945 | ||
946 | return 0; | |
947 | oom: | |
948 | if (pending) { | |
949 | dbus_pending_call_cancel(pending); | |
950 | dbus_pending_call_unref(pending); | |
951 | } | |
952 | ||
953 | if (message) | |
954 | dbus_message_unref(message); | |
955 | ||
956 | return -ENOMEM; | |
957 | } | |
958 | ||
959 | static DBusConnection* manager_bus_connect_private(Manager *m, DBusBusType type) { | |
960 | const char *address; | |
961 | DBusConnection *connection; | |
962 | DBusError error; | |
963 | ||
964 | switch (type) { | |
965 | case DBUS_BUS_SYSTEM: | |
966 | address = getenv("DBUS_SYSTEM_BUS_ADDRESS"); | |
967 | if (!address || !address[0]) | |
968 | address = DBUS_SYSTEM_BUS_DEFAULT_ADDRESS; | |
969 | break; | |
970 | case DBUS_BUS_SESSION: | |
971 | address = getenv("DBUS_SESSION_BUS_ADDRESS"); | |
972 | if (!address || !address[0]) | |
973 | address = DBUS_SESSION_BUS_DEFAULT_ADDRESS; | |
974 | break; | |
975 | default: | |
976 | assert_not_reached("Invalid bus type"); | |
977 | } | |
978 | ||
979 | dbus_error_init(&error); | |
980 | ||
981 | connection = dbus_connection_open_private(address, &error); | |
982 | if (!connection) { | |
983 | log_warning("Failed to open private bus connection: %s", bus_error_message(&error)); | |
984 | goto fail; | |
985 | } | |
986 | ||
987 | return connection; | |
988 | fail: | |
989 | if (connection) | |
990 | dbus_connection_close(connection); | |
991 | dbus_error_free(&error); | |
992 | return NULL; | |
993 | } | |
994 | ||
995 | static int bus_init_system(Manager *m) { | |
996 | int r; | |
997 | ||
998 | if (m->system_bus) | |
999 | return 0; | |
1000 | ||
1001 | m->system_bus = manager_bus_connect_private(m, DBUS_BUS_SYSTEM); | |
1002 | if (!m->system_bus) { | |
1003 | log_debug("Failed to connect to system D-Bus, retrying later"); | |
1004 | r = 0; | |
1005 | goto fail; | |
9014a8bd | 1006 | } |
8e274523 | 1007 | |
cbd37330 MS |
1008 | r = bus_setup_loop(m, m->system_bus); |
1009 | if (r < 0) | |
1010 | goto fail; | |
1011 | ||
1012 | r = manager_bus_async_register(m, &m->system_bus); | |
1013 | if (r < 0) | |
1014 | goto fail; | |
1015 | ||
5e8d1c9a | 1016 | return 0; |
cbd37330 MS |
1017 | fail: |
1018 | bus_done_system(m); | |
1019 | ||
1020 | return r; | |
1021 | } | |
1022 | ||
1023 | static int bus_init_api(Manager *m) { | |
1024 | int r; | |
1025 | ||
1026 | if (m->api_bus) | |
1027 | return 0; | |
1028 | ||
1029 | if (m->running_as == MANAGER_SYSTEM) { | |
1030 | m->api_bus = m->system_bus; | |
1031 | /* In this mode there is no distinct connection to the API bus, | |
1032 | * the API is published on the system bus. | |
1033 | * bus_register_cb() is aware of that and will init the API | |
1034 | * when the system bus gets registered. | |
1035 | * No need to setup anything here. */ | |
1036 | return 0; | |
1037 | } | |
1038 | ||
1039 | m->api_bus = manager_bus_connect_private(m, DBUS_BUS_SESSION); | |
1040 | if (!m->api_bus) { | |
1041 | log_debug("Failed to connect to API D-Bus, retrying later"); | |
1042 | r = 0; | |
1043 | goto fail; | |
1044 | } | |
1045 | ||
1046 | r = bus_setup_loop(m, m->api_bus); | |
1047 | if (r < 0) | |
1048 | goto fail; | |
5e8d1c9a | 1049 | |
cbd37330 MS |
1050 | r = manager_bus_async_register(m, &m->api_bus); |
1051 | if (r < 0) | |
1052 | goto fail; | |
1053 | ||
1054 | return 0; | |
5e8d1c9a LP |
1055 | fail: |
1056 | bus_done_api(m); | |
5e8d1c9a LP |
1057 | |
1058 | return r; | |
1059 | } | |
1060 | ||
1061 | static int bus_init_private(Manager *m) { | |
1062 | DBusError error; | |
1063 | int r; | |
1064 | const char *const external_only[] = { | |
1065 | "EXTERNAL", | |
1066 | NULL | |
1067 | }; | |
1068 | ||
1069 | assert(m); | |
1070 | ||
1071 | dbus_error_init(&error); | |
1072 | ||
1073 | if (m->private_bus) | |
1074 | return 0; | |
1075 | ||
be81bfc4 LP |
1076 | if (m->running_as == MANAGER_SYSTEM) { |
1077 | ||
1078 | /* We want the private bus only when running as init */ | |
1079 | if (getpid() != 1) | |
1080 | return 0; | |
1081 | ||
1082 | unlink("/run/systemd/private"); | |
1083 | m->private_bus = dbus_server_listen("unix:path=/run/systemd/private", &error); | |
1084 | } else { | |
1085 | const char *e; | |
1086 | char *p; | |
1087 | ||
1088 | e = getenv("XDG_RUNTIME_DIR"); | |
1089 | if (!e) | |
1090 | return 0; | |
1091 | ||
1092 | if (asprintf(&p, "unix:path=%s/systemd/private", e) < 0) { | |
1093 | log_error("Not enough memory"); | |
1094 | r = -ENOMEM; | |
1095 | goto fail; | |
1096 | } | |
1097 | ||
1098 | mkdir_parents(p+10, 0755); | |
1099 | unlink(p+10); | |
1100 | m->private_bus = dbus_server_listen(p, &error); | |
1101 | free(p); | |
1102 | } | |
5e8d1c9a | 1103 | |
be81bfc4 | 1104 | if (!m->private_bus) { |
a2e52832 | 1105 | log_error("Failed to create private D-Bus server: %s", bus_error_message(&error)); |
5e8d1c9a LP |
1106 | r = -EIO; |
1107 | goto fail; | |
1108 | } | |
1109 | ||
1110 | if (!dbus_server_set_auth_mechanisms(m->private_bus, (const char**) external_only) || | |
1111 | !dbus_server_set_watch_functions(m->private_bus, bus_add_watch, bus_remove_watch, bus_toggle_watch, m, NULL) || | |
1112 | !dbus_server_set_timeout_functions(m->private_bus, bus_add_timeout, bus_remove_timeout, bus_toggle_timeout, m, NULL)) { | |
1113 | log_error("Not enough memory"); | |
1114 | r = -ENOMEM; | |
1115 | goto fail; | |
1116 | } | |
1117 | ||
1118 | dbus_server_set_new_connection_function(m->private_bus, bus_new_connection, m, NULL); | |
1119 | ||
54165a39 | 1120 | log_debug("Successfully created private D-Bus server."); |
5e8d1c9a LP |
1121 | |
1122 | return 0; | |
1123 | ||
1124 | fail: | |
1125 | bus_done_private(m); | |
1126 | dbus_error_free(&error); | |
1127 | ||
1128 | return r; | |
1129 | } | |
1130 | ||
3996fbe2 | 1131 | int bus_init(Manager *m, bool try_bus_connect) { |
5e8d1c9a LP |
1132 | int r; |
1133 | ||
1134 | if (set_ensure_allocated(&m->bus_connections, trivial_hash_func, trivial_compare_func) < 0 || | |
cbd37330 MS |
1135 | set_ensure_allocated(&m->bus_connections_for_dispatch, trivial_hash_func, trivial_compare_func) < 0) |
1136 | goto oom; | |
5e8d1c9a LP |
1137 | |
1138 | if (m->name_data_slot < 0) | |
cbd37330 MS |
1139 | if (!dbus_pending_call_allocate_data_slot(&m->name_data_slot)) |
1140 | goto oom; | |
1141 | ||
1142 | if (m->conn_data_slot < 0) | |
1143 | if (!dbus_pending_call_allocate_data_slot(&m->conn_data_slot)) | |
1144 | goto oom; | |
5e8d1c9a | 1145 | |
a567261a | 1146 | if (m->subscribed_data_slot < 0) |
cbd37330 MS |
1147 | if (!dbus_connection_allocate_data_slot(&m->subscribed_data_slot)) |
1148 | goto oom; | |
a567261a | 1149 | |
3996fbe2 LP |
1150 | if (try_bus_connect) { |
1151 | if ((r = bus_init_system(m)) < 0 || | |
1152 | (r = bus_init_api(m)) < 0) | |
1153 | return r; | |
1154 | } | |
1155 | ||
1156 | if ((r = bus_init_private(m)) < 0) | |
5e8d1c9a | 1157 | return r; |
f278026d | 1158 | |
ea430986 | 1159 | return 0; |
cbd37330 MS |
1160 | oom: |
1161 | log_error("Not enough memory"); | |
1162 | return -ENOMEM; | |
ea430986 LP |
1163 | } |
1164 | ||
fae20b11 | 1165 | static void shutdown_connection(Manager *m, DBusConnection *c) { |
a567261a LP |
1166 | Set *s; |
1167 | Job *j; | |
1168 | Iterator i; | |
1169 | ||
97e6a119 MS |
1170 | HASHMAP_FOREACH(j, m->jobs, i) { |
1171 | JobBusClient *cl, *nextcl; | |
1172 | LIST_FOREACH_SAFE(client, cl, nextcl, j->bus_client_list) { | |
1173 | if (cl->bus == c) { | |
1174 | LIST_REMOVE(JobBusClient, client, j->bus_client_list, cl); | |
1175 | free(cl); | |
1176 | } | |
a567261a | 1177 | } |
97e6a119 | 1178 | } |
a567261a | 1179 | |
fae20b11 LP |
1180 | set_remove(m->bus_connections, c); |
1181 | set_remove(m->bus_connections_for_dispatch, c); | |
1182 | ||
a567261a LP |
1183 | if ((s = BUS_CONNECTION_SUBSCRIBED(m, c))) { |
1184 | char *t; | |
1185 | ||
1186 | while ((t = set_steal_first(s))) | |
1187 | free(t); | |
1188 | ||
1189 | set_free(s); | |
1190 | } | |
1191 | ||
7b97f477 LP |
1192 | if (m->queued_message_connection == c) { |
1193 | m->queued_message_connection = NULL; | |
1194 | ||
1195 | if (m->queued_message) { | |
1196 | dbus_message_unref(m->queued_message); | |
1197 | m->queued_message = NULL; | |
1198 | } | |
1199 | } | |
1200 | ||
5e8d1c9a | 1201 | dbus_connection_set_dispatch_status_function(c, NULL, NULL, NULL); |
9721b199 MS |
1202 | /* system manager cannot afford to block on DBus */ |
1203 | if (m->running_as != MANAGER_SYSTEM) | |
1204 | dbus_connection_flush(c); | |
5e8d1c9a LP |
1205 | dbus_connection_close(c); |
1206 | dbus_connection_unref(c); | |
1207 | } | |
1208 | ||
1209 | static void bus_done_api(Manager *m) { | |
cbd37330 MS |
1210 | if (!m->api_bus) |
1211 | return; | |
f278026d | 1212 | |
cbd37330 | 1213 | if (m->running_as == MANAGER_USER) |
fae20b11 | 1214 | shutdown_connection(m, m->api_bus); |
c1e1601e | 1215 | |
cbd37330 | 1216 | m->api_bus = NULL; |
05e343b7 | 1217 | |
cbd37330 MS |
1218 | if (m->queued_message) { |
1219 | dbus_message_unref(m->queued_message); | |
1220 | m->queued_message = NULL; | |
1221 | } | |
ea430986 LP |
1222 | } |
1223 | ||
5e8d1c9a | 1224 | static void bus_done_system(Manager *m) { |
cbd37330 MS |
1225 | if (!m->system_bus) |
1226 | return; | |
f278026d | 1227 | |
cbd37330 | 1228 | if (m->running_as == MANAGER_SYSTEM) |
f278026d LP |
1229 | bus_done_api(m); |
1230 | ||
cbd37330 MS |
1231 | shutdown_connection(m, m->system_bus); |
1232 | m->system_bus = NULL; | |
f278026d LP |
1233 | } |
1234 | ||
5e8d1c9a | 1235 | static void bus_done_private(Manager *m) { |
cbd37330 MS |
1236 | if (!m->private_bus) |
1237 | return; | |
5e8d1c9a | 1238 | |
cbd37330 MS |
1239 | dbus_server_disconnect(m->private_bus); |
1240 | dbus_server_unref(m->private_bus); | |
1241 | m->private_bus = NULL; | |
5e8d1c9a LP |
1242 | } |
1243 | ||
1244 | void bus_done(Manager *m) { | |
1245 | DBusConnection *c; | |
1246 | ||
1247 | bus_done_api(m); | |
1248 | bus_done_system(m); | |
1249 | bus_done_private(m); | |
1250 | ||
1251 | while ((c = set_steal_first(m->bus_connections))) | |
fae20b11 | 1252 | shutdown_connection(m, c); |
5e8d1c9a LP |
1253 | |
1254 | while ((c = set_steal_first(m->bus_connections_for_dispatch))) | |
fae20b11 | 1255 | shutdown_connection(m, c); |
5e8d1c9a LP |
1256 | |
1257 | set_free(m->bus_connections); | |
1258 | set_free(m->bus_connections_for_dispatch); | |
1259 | ||
1260 | if (m->name_data_slot >= 0) | |
1261 | dbus_pending_call_free_data_slot(&m->name_data_slot); | |
a567261a | 1262 | |
cbd37330 MS |
1263 | if (m->conn_data_slot >= 0) |
1264 | dbus_pending_call_free_data_slot(&m->conn_data_slot); | |
1265 | ||
a567261a | 1266 | if (m->subscribed_data_slot >= 0) |
d83685ac | 1267 | dbus_connection_free_data_slot(&m->subscribed_data_slot); |
5e8d1c9a LP |
1268 | } |
1269 | ||
05e343b7 LP |
1270 | static void query_pid_pending_cb(DBusPendingCall *pending, void *userdata) { |
1271 | Manager *m = userdata; | |
1272 | DBusMessage *reply; | |
1273 | DBusError error; | |
1274 | const char *name; | |
1275 | ||
1276 | dbus_error_init(&error); | |
1277 | ||
a567261a | 1278 | assert_se(name = BUS_PENDING_CALL_NAME(m, pending)); |
05e343b7 LP |
1279 | assert_se(reply = dbus_pending_call_steal_reply(pending)); |
1280 | ||
1281 | switch (dbus_message_get_type(reply)) { | |
1282 | ||
1283 | case DBUS_MESSAGE_TYPE_ERROR: | |
1284 | ||
1285 | assert_se(dbus_set_error_from_message(&error, reply)); | |
a2e52832 | 1286 | log_warning("GetConnectionUnixProcessID() failed: %s", bus_error_message(&error)); |
05e343b7 LP |
1287 | break; |
1288 | ||
1289 | case DBUS_MESSAGE_TYPE_METHOD_RETURN: { | |
1290 | uint32_t r; | |
1291 | ||
1292 | if (!dbus_message_get_args(reply, | |
1293 | &error, | |
1294 | DBUS_TYPE_UINT32, &r, | |
1295 | DBUS_TYPE_INVALID)) { | |
a2e52832 | 1296 | log_error("Failed to parse GetConnectionUnixProcessID() reply: %s", bus_error_message(&error)); |
05e343b7 LP |
1297 | break; |
1298 | } | |
1299 | ||
1300 | manager_dispatch_bus_query_pid_done(m, name, (pid_t) r); | |
1301 | break; | |
1302 | } | |
1303 | ||
1304 | default: | |
1305 | assert_not_reached("Invalid reply message"); | |
1306 | } | |
1307 | ||
1308 | dbus_message_unref(reply); | |
1309 | dbus_error_free(&error); | |
1310 | } | |
1311 | ||
1312 | int bus_query_pid(Manager *m, const char *name) { | |
1313 | DBusMessage *message = NULL; | |
1314 | DBusPendingCall *pending = NULL; | |
1315 | char *n = NULL; | |
1316 | ||
1317 | assert(m); | |
1318 | assert(name); | |
1319 | ||
1320 | if (!(message = dbus_message_new_method_call( | |
1321 | DBUS_SERVICE_DBUS, | |
1322 | DBUS_PATH_DBUS, | |
1323 | DBUS_INTERFACE_DBUS, | |
1324 | "GetConnectionUnixProcessID"))) | |
1325 | goto oom; | |
1326 | ||
1327 | if (!(dbus_message_append_args( | |
1328 | message, | |
1329 | DBUS_TYPE_STRING, &name, | |
1330 | DBUS_TYPE_INVALID))) | |
1331 | goto oom; | |
1332 | ||
1333 | if (!dbus_connection_send_with_reply(m->api_bus, message, &pending, -1)) | |
1334 | goto oom; | |
1335 | ||
1336 | if (!(n = strdup(name))) | |
1337 | goto oom; | |
1338 | ||
1339 | if (!dbus_pending_call_set_data(pending, m->name_data_slot, n, free)) | |
1340 | goto oom; | |
1341 | ||
1342 | n = NULL; | |
1343 | ||
1344 | if (!dbus_pending_call_set_notify(pending, query_pid_pending_cb, m, NULL)) | |
1345 | goto oom; | |
1346 | ||
1347 | dbus_message_unref(message); | |
1348 | dbus_pending_call_unref(pending); | |
1349 | ||
1350 | return 0; | |
1351 | ||
1352 | oom: | |
1353 | free(n); | |
1354 | ||
1355 | if (pending) { | |
1356 | dbus_pending_call_cancel(pending); | |
1357 | dbus_pending_call_unref(pending); | |
1358 | } | |
1359 | ||
1360 | if (message) | |
1361 | dbus_message_unref(message); | |
1362 | ||
1363 | return -ENOMEM; | |
1364 | } | |
1365 | ||
5e8d1c9a LP |
1366 | int bus_broadcast(Manager *m, DBusMessage *message) { |
1367 | bool oom = false; | |
1368 | Iterator i; | |
1369 | DBusConnection *c; | |
1370 | ||
1371 | assert(m); | |
1372 | assert(message); | |
1373 | ||
1374 | SET_FOREACH(c, m->bus_connections_for_dispatch, i) | |
a3d4e06d | 1375 | if (c != m->system_bus || m->running_as == MANAGER_SYSTEM) |
5e8d1c9a LP |
1376 | oom = !dbus_connection_send(c, message, NULL); |
1377 | ||
1378 | SET_FOREACH(c, m->bus_connections, i) | |
a3d4e06d | 1379 | if (c != m->system_bus || m->running_as == MANAGER_SYSTEM) |
5e8d1c9a LP |
1380 | oom = !dbus_connection_send(c, message, NULL); |
1381 | ||
1382 | return oom ? -ENOMEM : 0; | |
1383 | } | |
1384 | ||
a567261a LP |
1385 | bool bus_has_subscriber(Manager *m) { |
1386 | Iterator i; | |
1387 | DBusConnection *c; | |
1388 | ||
1389 | assert(m); | |
1390 | ||
1391 | SET_FOREACH(c, m->bus_connections_for_dispatch, i) | |
1392 | if (bus_connection_has_subscriber(m, c)) | |
1393 | return true; | |
1394 | ||
1395 | SET_FOREACH(c, m->bus_connections, i) | |
1396 | if (bus_connection_has_subscriber(m, c)) | |
1397 | return true; | |
1398 | ||
1399 | return false; | |
1400 | } | |
1401 | ||
1402 | bool bus_connection_has_subscriber(Manager *m, DBusConnection *c) { | |
1403 | assert(m); | |
1404 | assert(c); | |
1405 | ||
1406 | return !set_isempty(BUS_CONNECTION_SUBSCRIBED(m, c)); | |
1407 | } | |
b23de6af LP |
1408 | |
1409 | int bus_fdset_add_all(Manager *m, FDSet *fds) { | |
1410 | Iterator i; | |
1411 | DBusConnection *c; | |
1412 | ||
1413 | assert(m); | |
1414 | assert(fds); | |
1415 | ||
1416 | /* When we are about to reexecute we add all D-Bus fds to the | |
1417 | * set to pass over to the newly executed systemd. They won't | |
1418 | * be used there however, except that they are closed at the | |
1419 | * very end of deserialization, those making it possible for | |
44143309 | 1420 | * clients to synchronously wait for systemd to reexec by |
b23de6af LP |
1421 | * simply waiting for disconnection */ |
1422 | ||
1423 | SET_FOREACH(c, m->bus_connections_for_dispatch, i) { | |
1424 | int fd; | |
1425 | ||
1426 | if (dbus_connection_get_unix_fd(c, &fd)) { | |
1427 | fd = fdset_put_dup(fds, fd); | |
1428 | ||
1429 | if (fd < 0) | |
1430 | return fd; | |
1431 | } | |
1432 | } | |
1433 | ||
1434 | SET_FOREACH(c, m->bus_connections, i) { | |
1435 | int fd; | |
1436 | ||
1437 | if (dbus_connection_get_unix_fd(c, &fd)) { | |
1438 | fd = fdset_put_dup(fds, fd); | |
1439 | ||
1440 | if (fd < 0) | |
1441 | return fd; | |
1442 | } | |
1443 | } | |
1444 | ||
1445 | return 0; | |
1446 | } | |
18fa6b27 LP |
1447 | |
1448 | void bus_broadcast_finished( | |
1449 | Manager *m, | |
1450 | usec_t kernel_usec, | |
1451 | usec_t initrd_usec, | |
1452 | usec_t userspace_usec, | |
1453 | usec_t total_usec) { | |
1454 | ||
1455 | DBusMessage *message; | |
1456 | ||
1457 | assert(m); | |
1458 | ||
1459 | message = dbus_message_new_signal("/org/freedesktop/systemd1", "org.freedesktop.systemd1.Manager", "StartupFinished"); | |
1460 | if (!message) { | |
1461 | log_error("Out of memory."); | |
1462 | return; | |
1463 | } | |
1464 | ||
1465 | assert_cc(sizeof(usec_t) == sizeof(uint64_t)); | |
1466 | if (!dbus_message_append_args(message, | |
1467 | DBUS_TYPE_UINT64, &kernel_usec, | |
1468 | DBUS_TYPE_UINT64, &initrd_usec, | |
1469 | DBUS_TYPE_UINT64, &userspace_usec, | |
1470 | DBUS_TYPE_UINT64, &total_usec, | |
1471 | DBUS_TYPE_INVALID)) { | |
1472 | log_error("Out of memory."); | |
1473 | goto finish; | |
1474 | } | |
1475 | ||
1476 | ||
1477 | if (bus_broadcast(m, message) < 0) { | |
1478 | log_error("Out of memory."); | |
1479 | goto finish; | |
1480 | } | |
1481 | ||
1482 | finish: | |
c99ddfaa | 1483 | if (message) |
18fa6b27 LP |
1484 | dbus_message_unref(message); |
1485 | } |