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53e1b683 | 1 | /* SPDX-License-Identifier: LGPL-2.1+ */ |
992c052c LP |
2 | /*** |
3 | This file is part of systemd. | |
4 | ||
5 | Copyright 2013 Lennart Poettering | |
6 | ||
7 | systemd is free software; you can redistribute it and/or modify it | |
8 | under the terms of the GNU Lesser General Public License as published by | |
9 | the Free Software Foundation; either version 2.1 of the License, or | |
10 | (at your option) any later version. | |
11 | ||
12 | systemd is distributed in the hope that it will be useful, but | |
13 | WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
15 | Lesser General Public License for more details. | |
16 | ||
17 | You should have received a copy of the GNU Lesser General Public License | |
18 | along with systemd; If not, see <http://www.gnu.org/licenses/>. | |
19 | ***/ | |
20 | ||
b5efdb8a | 21 | #include "alloc-util.h" |
992c052c | 22 | #include "bus-internal.h" |
07630cea | 23 | #include "bus-introspect.h" |
992c052c | 24 | #include "bus-message.h" |
cf0fbc49 | 25 | #include "bus-objects.h" |
992c052c | 26 | #include "bus-signature.h" |
19befb2d | 27 | #include "bus-slot.h" |
07630cea LP |
28 | #include "bus-type.h" |
29 | #include "bus-util.h" | |
30 | #include "set.h" | |
31 | #include "string-util.h" | |
32 | #include "strv.h" | |
992c052c LP |
33 | |
34 | static int node_vtable_get_userdata( | |
35 | sd_bus *bus, | |
36 | const char *path, | |
37 | struct node_vtable *c, | |
f00c3121 LP |
38 | void **userdata, |
39 | sd_bus_error *error) { | |
992c052c | 40 | |
19befb2d | 41 | sd_bus_slot *s; |
00590f82 | 42 | void *u, *found_u; |
992c052c LP |
43 | int r; |
44 | ||
45 | assert(bus); | |
46 | assert(path); | |
47 | assert(c); | |
48 | ||
19befb2d LP |
49 | s = container_of(c, sd_bus_slot, node_vtable); |
50 | u = s->userdata; | |
992c052c | 51 | if (c->find) { |
1b64f838 | 52 | bus->current_slot = sd_bus_slot_ref(s); |
caa82984 | 53 | bus->current_userdata = u; |
00590f82 | 54 | r = c->find(bus, path, c->interface, u, &found_u, error); |
caa82984 | 55 | bus->current_userdata = NULL; |
1b64f838 | 56 | bus->current_slot = sd_bus_slot_unref(s); |
19befb2d | 57 | |
f00c3121 LP |
58 | if (r < 0) |
59 | return r; | |
60 | if (sd_bus_error_is_set(error)) | |
5958d089 | 61 | return -sd_bus_error_get_errno(error); |
f00c3121 | 62 | if (r == 0) |
992c052c | 63 | return r; |
00590f82 AJ |
64 | } else |
65 | found_u = u; | |
992c052c LP |
66 | |
67 | if (userdata) | |
00590f82 | 68 | *userdata = found_u; |
992c052c LP |
69 | |
70 | return 1; | |
71 | } | |
72 | ||
09c8a7c6 | 73 | static void *vtable_method_convert_userdata(const sd_bus_vtable *p, void *u) { |
74 | assert(p); | |
75 | ||
76 | return (uint8_t*) u + p->x.method.offset; | |
77 | } | |
78 | ||
992c052c LP |
79 | static void *vtable_property_convert_userdata(const sd_bus_vtable *p, void *u) { |
80 | assert(p); | |
81 | ||
77a874a3 | 82 | return (uint8_t*) u + p->x.property.offset; |
992c052c LP |
83 | } |
84 | ||
85 | static int vtable_property_get_userdata( | |
86 | sd_bus *bus, | |
87 | const char *path, | |
88 | struct vtable_member *p, | |
f00c3121 LP |
89 | void **userdata, |
90 | sd_bus_error *error) { | |
992c052c LP |
91 | |
92 | void *u; | |
93 | int r; | |
94 | ||
95 | assert(bus); | |
96 | assert(path); | |
97 | assert(p); | |
98 | assert(userdata); | |
99 | ||
f00c3121 | 100 | r = node_vtable_get_userdata(bus, path, p->parent, &u, error); |
992c052c LP |
101 | if (r <= 0) |
102 | return r; | |
68313d3d LP |
103 | if (bus->nodes_modified) |
104 | return 0; | |
992c052c LP |
105 | |
106 | *userdata = vtable_property_convert_userdata(p->vtable, u); | |
107 | return 1; | |
108 | } | |
109 | ||
dfa92725 LP |
110 | static int add_enumerated_to_set( |
111 | sd_bus *bus, | |
112 | const char *prefix, | |
113 | struct node_enumerator *first, | |
f00c3121 LP |
114 | Set *s, |
115 | sd_bus_error *error) { | |
dfa92725 | 116 | |
992c052c LP |
117 | struct node_enumerator *c; |
118 | int r; | |
119 | ||
120 | assert(bus); | |
121 | assert(prefix); | |
122 | assert(s); | |
123 | ||
124 | LIST_FOREACH(enumerators, c, first) { | |
125 | char **children = NULL, **k; | |
1b64f838 | 126 | sd_bus_slot *slot; |
992c052c | 127 | |
68313d3d LP |
128 | if (bus->nodes_modified) |
129 | return 0; | |
130 | ||
1b64f838 LP |
131 | slot = container_of(c, sd_bus_slot, node_enumerator); |
132 | ||
133 | bus->current_slot = sd_bus_slot_ref(slot); | |
caa82984 | 134 | bus->current_userdata = slot->userdata; |
1b64f838 | 135 | r = c->callback(bus, prefix, slot->userdata, &children, error); |
caa82984 | 136 | bus->current_userdata = NULL; |
1b64f838 | 137 | bus->current_slot = sd_bus_slot_unref(slot); |
19befb2d | 138 | |
992c052c LP |
139 | if (r < 0) |
140 | return r; | |
f00c3121 | 141 | if (sd_bus_error_is_set(error)) |
5958d089 | 142 | return -sd_bus_error_get_errno(error); |
992c052c LP |
143 | |
144 | STRV_FOREACH(k, children) { | |
145 | if (r < 0) { | |
146 | free(*k); | |
147 | continue; | |
148 | } | |
149 | ||
9ed794a3 | 150 | if (!object_path_is_valid(*k)) { |
992c052c LP |
151 | free(*k); |
152 | r = -EINVAL; | |
153 | continue; | |
154 | } | |
155 | ||
5d66866d LP |
156 | if (!object_path_startswith(*k, prefix)) { |
157 | free(*k); | |
158 | continue; | |
159 | } | |
160 | ||
992c052c | 161 | r = set_consume(s, *k); |
52c7f2b2 LP |
162 | if (r == -EEXIST) |
163 | r = 0; | |
992c052c LP |
164 | } |
165 | ||
166 | free(children); | |
167 | if (r < 0) | |
168 | return r; | |
169 | } | |
170 | ||
171 | return 0; | |
172 | } | |
173 | ||
44eb1add DH |
174 | enum { |
175 | /* if set, add_subtree() works recursively */ | |
176 | CHILDREN_RECURSIVE = (1U << 1), | |
177 | /* if set, add_subtree() scans object-manager hierarchies recursively */ | |
178 | CHILDREN_SUBHIERARCHIES = (1U << 0), | |
179 | }; | |
180 | ||
dfa92725 LP |
181 | static int add_subtree_to_set( |
182 | sd_bus *bus, | |
183 | const char *prefix, | |
184 | struct node *n, | |
44eb1add | 185 | unsigned int flags, |
f00c3121 LP |
186 | Set *s, |
187 | sd_bus_error *error) { | |
dfa92725 | 188 | |
992c052c LP |
189 | struct node *i; |
190 | int r; | |
191 | ||
192 | assert(bus); | |
193 | assert(prefix); | |
194 | assert(n); | |
195 | assert(s); | |
196 | ||
f00c3121 | 197 | r = add_enumerated_to_set(bus, prefix, n->enumerators, s, error); |
992c052c LP |
198 | if (r < 0) |
199 | return r; | |
68313d3d LP |
200 | if (bus->nodes_modified) |
201 | return 0; | |
992c052c LP |
202 | |
203 | LIST_FOREACH(siblings, i, n->child) { | |
204 | char *t; | |
205 | ||
5d66866d LP |
206 | if (!object_path_startswith(i->path, prefix)) |
207 | continue; | |
208 | ||
992c052c LP |
209 | t = strdup(i->path); |
210 | if (!t) | |
211 | return -ENOMEM; | |
212 | ||
213 | r = set_consume(s, t); | |
214 | if (r < 0 && r != -EEXIST) | |
215 | return r; | |
216 | ||
44eb1add DH |
217 | if ((flags & CHILDREN_RECURSIVE) && |
218 | ((flags & CHILDREN_SUBHIERARCHIES) || !i->object_managers)) { | |
219 | r = add_subtree_to_set(bus, prefix, i, flags, s, error); | |
2d5c8a27 DH |
220 | if (r < 0) |
221 | return r; | |
222 | if (bus->nodes_modified) | |
223 | return 0; | |
224 | } | |
992c052c LP |
225 | } |
226 | ||
227 | return 0; | |
228 | } | |
229 | ||
dfa92725 LP |
230 | static int get_child_nodes( |
231 | sd_bus *bus, | |
232 | const char *prefix, | |
233 | struct node *n, | |
44eb1add | 234 | unsigned int flags, |
f00c3121 LP |
235 | Set **_s, |
236 | sd_bus_error *error) { | |
dfa92725 | 237 | |
992c052c LP |
238 | Set *s = NULL; |
239 | int r; | |
240 | ||
241 | assert(bus); | |
dfa92725 | 242 | assert(prefix); |
992c052c LP |
243 | assert(n); |
244 | assert(_s); | |
245 | ||
d5099efc | 246 | s = set_new(&string_hash_ops); |
992c052c LP |
247 | if (!s) |
248 | return -ENOMEM; | |
249 | ||
44eb1add | 250 | r = add_subtree_to_set(bus, prefix, n, flags, s, error); |
992c052c LP |
251 | if (r < 0) { |
252 | set_free_free(s); | |
253 | return r; | |
254 | } | |
255 | ||
256 | *_s = s; | |
257 | return 0; | |
258 | } | |
259 | ||
260 | static int node_callbacks_run( | |
261 | sd_bus *bus, | |
262 | sd_bus_message *m, | |
263 | struct node_callback *first, | |
264 | bool require_fallback, | |
265 | bool *found_object) { | |
266 | ||
267 | struct node_callback *c; | |
268 | int r; | |
269 | ||
270 | assert(bus); | |
271 | assert(m); | |
272 | assert(found_object); | |
273 | ||
274 | LIST_FOREACH(callbacks, c, first) { | |
4afd3348 | 275 | _cleanup_(sd_bus_error_free) sd_bus_error error_buffer = SD_BUS_ERROR_NULL; |
1b64f838 | 276 | sd_bus_slot *slot; |
ebcf1f97 | 277 | |
68313d3d LP |
278 | if (bus->nodes_modified) |
279 | return 0; | |
280 | ||
992c052c LP |
281 | if (require_fallback && !c->is_fallback) |
282 | continue; | |
283 | ||
284 | *found_object = true; | |
285 | ||
286 | if (c->last_iteration == bus->iteration_counter) | |
287 | continue; | |
288 | ||
68313d3d LP |
289 | c->last_iteration = bus->iteration_counter; |
290 | ||
992c052c LP |
291 | r = sd_bus_message_rewind(m, true); |
292 | if (r < 0) | |
293 | return r; | |
294 | ||
1b64f838 LP |
295 | slot = container_of(c, sd_bus_slot, node_callback); |
296 | ||
297 | bus->current_slot = sd_bus_slot_ref(slot); | |
caa82984 LP |
298 | bus->current_handler = c->callback; |
299 | bus->current_userdata = slot->userdata; | |
19070062 | 300 | r = c->callback(m, slot->userdata, &error_buffer); |
caa82984 LP |
301 | bus->current_userdata = NULL; |
302 | bus->current_handler = NULL; | |
1b64f838 | 303 | bus->current_slot = sd_bus_slot_unref(slot); |
19befb2d | 304 | |
ebcf1f97 | 305 | r = bus_maybe_reply_error(m, r, &error_buffer); |
992c052c LP |
306 | if (r != 0) |
307 | return r; | |
308 | } | |
309 | ||
310 | return 0; | |
311 | } | |
312 | ||
adacb957 LP |
313 | #define CAPABILITY_SHIFT(x) (((x) >> __builtin_ctzll(_SD_BUS_VTABLE_CAPABILITY_MASK)) & 0xFFFF) |
314 | ||
315 | static int check_access(sd_bus *bus, sd_bus_message *m, struct vtable_member *c, sd_bus_error *error) { | |
adacb957 | 316 | uint64_t cap; |
adacb957 LP |
317 | int r; |
318 | ||
319 | assert(bus); | |
320 | assert(m); | |
321 | assert(c); | |
322 | ||
323 | /* If the entire bus is trusted let's grant access */ | |
324 | if (bus->trusted) | |
325 | return 0; | |
326 | ||
327 | /* If the member is marked UNPRIVILEGED let's grant access */ | |
328 | if (c->vtable->flags & SD_BUS_VTABLE_UNPRIVILEGED) | |
329 | return 0; | |
330 | ||
adacb957 LP |
331 | /* Check have the caller has the requested capability |
332 | * set. Note that the flags value contains the capability | |
333 | * number plus one, which we need to subtract here. We do this | |
334 | * so that we have 0 as special value for "default | |
335 | * capability". */ | |
336 | cap = CAPABILITY_SHIFT(c->vtable->flags); | |
337 | if (cap == 0) | |
338 | cap = CAPABILITY_SHIFT(c->parent->vtable[0].flags); | |
339 | if (cap == 0) | |
340 | cap = CAP_SYS_ADMIN; | |
341 | else | |
313cefa1 | 342 | cap--; |
adacb957 | 343 | |
def9a7aa LP |
344 | r = sd_bus_query_sender_privilege(m, cap); |
345 | if (r < 0) | |
346 | return r; | |
adacb957 | 347 | if (r > 0) |
def9a7aa | 348 | return 0; |
adacb957 LP |
349 | |
350 | return sd_bus_error_setf(error, SD_BUS_ERROR_ACCESS_DENIED, "Access to %s.%s() not permitted.", c->interface, c->member); | |
351 | } | |
352 | ||
992c052c LP |
353 | static int method_callbacks_run( |
354 | sd_bus *bus, | |
355 | sd_bus_message *m, | |
356 | struct vtable_member *c, | |
357 | bool require_fallback, | |
358 | bool *found_object) { | |
359 | ||
4afd3348 | 360 | _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL; |
992c052c LP |
361 | const char *signature; |
362 | void *u; | |
363 | int r; | |
364 | ||
365 | assert(bus); | |
366 | assert(m); | |
367 | assert(c); | |
368 | assert(found_object); | |
369 | ||
370 | if (require_fallback && !c->parent->is_fallback) | |
371 | return 0; | |
372 | ||
adacb957 LP |
373 | r = check_access(bus, m, c, &error); |
374 | if (r < 0) | |
375 | return bus_maybe_reply_error(m, r, &error); | |
376 | ||
f00c3121 | 377 | r = node_vtable_get_userdata(bus, m->path, c->parent, &u, &error); |
992c052c | 378 | if (r <= 0) |
f00c3121 | 379 | return bus_maybe_reply_error(m, r, &error); |
68313d3d LP |
380 | if (bus->nodes_modified) |
381 | return 0; | |
992c052c | 382 | |
09c8a7c6 | 383 | u = vtable_method_convert_userdata(c->vtable, u); |
384 | ||
992c052c LP |
385 | *found_object = true; |
386 | ||
68313d3d LP |
387 | if (c->last_iteration == bus->iteration_counter) |
388 | return 0; | |
389 | ||
390 | c->last_iteration = bus->iteration_counter; | |
391 | ||
992c052c LP |
392 | r = sd_bus_message_rewind(m, true); |
393 | if (r < 0) | |
394 | return r; | |
395 | ||
40ca29a1 LP |
396 | signature = sd_bus_message_get_signature(m, true); |
397 | if (!signature) | |
398 | return -EINVAL; | |
992c052c | 399 | |
f00c3121 | 400 | if (!streq(strempty(c->vtable->x.method.signature), signature)) |
86b8d289 LP |
401 | return sd_bus_reply_method_errorf( |
402 | m, | |
403 | SD_BUS_ERROR_INVALID_ARGS, | |
404 | "Invalid arguments '%s' to call %s.%s(), expecting '%s'.", | |
405 | signature, c->interface, c->member, strempty(c->vtable->x.method.signature)); | |
992c052c | 406 | |
6717d473 LP |
407 | /* Keep track what the signature of the reply to this message |
408 | * should be, so that this can be enforced when sealing the | |
409 | * reply. */ | |
410 | m->enforced_reply_signature = strempty(c->vtable->x.method.result); | |
411 | ||
ebcf1f97 | 412 | if (c->vtable->x.method.handler) { |
1b64f838 LP |
413 | sd_bus_slot *slot; |
414 | ||
415 | slot = container_of(c->parent, sd_bus_slot, node_vtable); | |
19befb2d | 416 | |
1b64f838 | 417 | bus->current_slot = sd_bus_slot_ref(slot); |
caa82984 LP |
418 | bus->current_handler = c->vtable->x.method.handler; |
419 | bus->current_userdata = u; | |
19070062 | 420 | r = c->vtable->x.method.handler(m, u, &error); |
caa82984 LP |
421 | bus->current_userdata = NULL; |
422 | bus->current_handler = NULL; | |
1b64f838 | 423 | bus->current_slot = sd_bus_slot_unref(slot); |
19befb2d | 424 | |
f00c3121 | 425 | return bus_maybe_reply_error(m, r, &error); |
ebcf1f97 | 426 | } |
992c052c LP |
427 | |
428 | /* If the method callback is NULL, make this a successful NOP */ | |
df2d202e | 429 | r = sd_bus_reply_method_return(m, NULL); |
992c052c LP |
430 | if (r < 0) |
431 | return r; | |
432 | ||
433 | return 1; | |
434 | } | |
435 | ||
436 | static int invoke_property_get( | |
437 | sd_bus *bus, | |
19befb2d | 438 | sd_bus_slot *slot, |
992c052c LP |
439 | const sd_bus_vtable *v, |
440 | const char *path, | |
441 | const char *interface, | |
442 | const char *property, | |
ebcf1f97 LP |
443 | sd_bus_message *reply, |
444 | void *userdata, | |
445 | sd_bus_error *error) { | |
992c052c | 446 | |
af8601fa | 447 | const void *p; |
f00c3121 | 448 | int r; |
992c052c LP |
449 | |
450 | assert(bus); | |
19befb2d | 451 | assert(slot); |
992c052c | 452 | assert(v); |
dfa92725 LP |
453 | assert(path); |
454 | assert(interface); | |
455 | assert(property); | |
ebcf1f97 | 456 | assert(reply); |
992c052c | 457 | |
f00c3121 | 458 | if (v->x.property.get) { |
19befb2d | 459 | |
1b64f838 | 460 | bus->current_slot = sd_bus_slot_ref(slot); |
caa82984 | 461 | bus->current_userdata = userdata; |
f00c3121 | 462 | r = v->x.property.get(bus, path, interface, property, reply, userdata, error); |
caa82984 | 463 | bus->current_userdata = NULL; |
1b64f838 | 464 | bus->current_slot = sd_bus_slot_unref(slot); |
19befb2d | 465 | |
f00c3121 LP |
466 | if (r < 0) |
467 | return r; | |
468 | if (sd_bus_error_is_set(error)) | |
5958d089 | 469 | return -sd_bus_error_get_errno(error); |
f00c3121 LP |
470 | return r; |
471 | } | |
992c052c LP |
472 | |
473 | /* Automatic handling if no callback is defined. */ | |
474 | ||
c13c7de3 | 475 | if (streq(v->x.property.signature, "as")) |
ebcf1f97 | 476 | return sd_bus_message_append_strv(reply, *(char***) userdata); |
c13c7de3 | 477 | |
77a874a3 LP |
478 | assert(signature_is_single(v->x.property.signature, false)); |
479 | assert(bus_type_is_basic(v->x.property.signature[0])); | |
992c052c | 480 | |
77a874a3 | 481 | switch (v->x.property.signature[0]) { |
992c052c LP |
482 | |
483 | case SD_BUS_TYPE_STRING: | |
28d6633a LP |
484 | case SD_BUS_TYPE_SIGNATURE: |
485 | p = strempty(*(char**) userdata); | |
af8601fa KS |
486 | break; |
487 | ||
992c052c | 488 | case SD_BUS_TYPE_OBJECT_PATH: |
992c052c | 489 | p = *(char**) userdata; |
28d6633a | 490 | assert(p); |
992c052c LP |
491 | break; |
492 | ||
493 | default: | |
494 | p = userdata; | |
495 | break; | |
496 | } | |
497 | ||
ebcf1f97 | 498 | return sd_bus_message_append_basic(reply, v->x.property.signature[0], p); |
992c052c LP |
499 | } |
500 | ||
501 | static int invoke_property_set( | |
502 | sd_bus *bus, | |
19befb2d | 503 | sd_bus_slot *slot, |
992c052c LP |
504 | const sd_bus_vtable *v, |
505 | const char *path, | |
506 | const char *interface, | |
507 | const char *property, | |
508 | sd_bus_message *value, | |
ebcf1f97 LP |
509 | void *userdata, |
510 | sd_bus_error *error) { | |
992c052c LP |
511 | |
512 | int r; | |
513 | ||
514 | assert(bus); | |
19befb2d | 515 | assert(slot); |
992c052c | 516 | assert(v); |
dfa92725 LP |
517 | assert(path); |
518 | assert(interface); | |
519 | assert(property); | |
520 | assert(value); | |
992c052c | 521 | |
f00c3121 | 522 | if (v->x.property.set) { |
19befb2d | 523 | |
1b64f838 | 524 | bus->current_slot = sd_bus_slot_ref(slot); |
caa82984 | 525 | bus->current_userdata = userdata; |
f00c3121 | 526 | r = v->x.property.set(bus, path, interface, property, value, userdata, error); |
caa82984 | 527 | bus->current_userdata = NULL; |
1b64f838 | 528 | bus->current_slot = sd_bus_slot_unref(slot); |
19befb2d | 529 | |
f00c3121 LP |
530 | if (r < 0) |
531 | return r; | |
532 | if (sd_bus_error_is_set(error)) | |
5958d089 | 533 | return -sd_bus_error_get_errno(error); |
f00c3121 LP |
534 | return r; |
535 | } | |
992c052c LP |
536 | |
537 | /* Automatic handling if no callback is defined. */ | |
538 | ||
77a874a3 LP |
539 | assert(signature_is_single(v->x.property.signature, false)); |
540 | assert(bus_type_is_basic(v->x.property.signature[0])); | |
992c052c | 541 | |
77a874a3 | 542 | switch (v->x.property.signature[0]) { |
992c052c LP |
543 | |
544 | case SD_BUS_TYPE_STRING: | |
545 | case SD_BUS_TYPE_OBJECT_PATH: | |
546 | case SD_BUS_TYPE_SIGNATURE: { | |
547 | const char *p; | |
548 | char *n; | |
549 | ||
77a874a3 | 550 | r = sd_bus_message_read_basic(value, v->x.property.signature[0], &p); |
992c052c LP |
551 | if (r < 0) |
552 | return r; | |
553 | ||
554 | n = strdup(p); | |
555 | if (!n) | |
556 | return -ENOMEM; | |
557 | ||
558 | free(*(char**) userdata); | |
559 | *(char**) userdata = n; | |
560 | ||
561 | break; | |
562 | } | |
563 | ||
564 | default: | |
77a874a3 | 565 | r = sd_bus_message_read_basic(value, v->x.property.signature[0], userdata); |
992c052c LP |
566 | if (r < 0) |
567 | return r; | |
568 | ||
569 | break; | |
570 | } | |
571 | ||
572 | return 1; | |
573 | } | |
574 | ||
575 | static int property_get_set_callbacks_run( | |
576 | sd_bus *bus, | |
577 | sd_bus_message *m, | |
578 | struct vtable_member *c, | |
579 | bool require_fallback, | |
580 | bool is_get, | |
581 | bool *found_object) { | |
582 | ||
4afd3348 LP |
583 | _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL; |
584 | _cleanup_(sd_bus_message_unrefp) sd_bus_message *reply = NULL; | |
19befb2d | 585 | sd_bus_slot *slot; |
c94d7fc3 | 586 | void *u = NULL; |
992c052c LP |
587 | int r; |
588 | ||
589 | assert(bus); | |
590 | assert(m); | |
dfa92725 | 591 | assert(c); |
992c052c LP |
592 | assert(found_object); |
593 | ||
594 | if (require_fallback && !c->parent->is_fallback) | |
595 | return 0; | |
596 | ||
f00c3121 | 597 | r = vtable_property_get_userdata(bus, m->path, c, &u, &error); |
992c052c | 598 | if (r <= 0) |
f00c3121 | 599 | return bus_maybe_reply_error(m, r, &error); |
68313d3d LP |
600 | if (bus->nodes_modified) |
601 | return 0; | |
992c052c | 602 | |
19befb2d LP |
603 | slot = container_of(c->parent, sd_bus_slot, node_vtable); |
604 | ||
992c052c LP |
605 | *found_object = true; |
606 | ||
df2d202e | 607 | r = sd_bus_message_new_method_return(m, &reply); |
992c052c LP |
608 | if (r < 0) |
609 | return r; | |
610 | ||
992c052c | 611 | if (is_get) { |
68313d3d LP |
612 | /* Note that we do not protect against reexecution |
613 | * here (using the last_iteration check, see below), | |
614 | * should the node tree have changed and we got called | |
615 | * again. We assume that property Get() calls are | |
616 | * ultimately without side-effects or if they aren't | |
617 | * then at least idempotent. */ | |
618 | ||
77a874a3 | 619 | r = sd_bus_message_open_container(reply, 'v', c->vtable->x.property.signature); |
992c052c LP |
620 | if (r < 0) |
621 | return r; | |
622 | ||
adacb957 LP |
623 | /* Note that we do not do an access check here. Read |
624 | * access to properties is always unrestricted, since | |
625 | * PropertiesChanged signals broadcast contents | |
626 | * anyway. */ | |
627 | ||
19befb2d | 628 | r = invoke_property_get(bus, slot, c->vtable, m->path, c->interface, c->member, reply, u, &error); |
992c052c | 629 | if (r < 0) |
f00c3121 | 630 | return bus_maybe_reply_error(m, r, &error); |
992c052c | 631 | |
68313d3d LP |
632 | if (bus->nodes_modified) |
633 | return 0; | |
634 | ||
992c052c LP |
635 | r = sd_bus_message_close_container(reply); |
636 | if (r < 0) | |
637 | return r; | |
638 | ||
639 | } else { | |
0ca454d4 LP |
640 | const char *signature = NULL; |
641 | char type = 0; | |
642 | ||
992c052c | 643 | if (c->vtable->type != _SD_BUS_VTABLE_WRITABLE_PROPERTY) |
ebcf1f97 | 644 | return sd_bus_reply_method_errorf(m, SD_BUS_ERROR_PROPERTY_READ_ONLY, "Property '%s' is not writable.", c->member); |
68313d3d | 645 | |
ebcf1f97 LP |
646 | /* Avoid that we call the set routine more than once |
647 | * if the processing of this message got restarted | |
648 | * because the node tree changed. */ | |
649 | if (c->last_iteration == bus->iteration_counter) | |
650 | return 0; | |
992c052c | 651 | |
ebcf1f97 | 652 | c->last_iteration = bus->iteration_counter; |
992c052c | 653 | |
0ca454d4 LP |
654 | r = sd_bus_message_peek_type(m, &type, &signature); |
655 | if (r < 0) | |
656 | return r; | |
657 | ||
658 | if (type != 'v' || !streq(strempty(signature), strempty(c->vtable->x.property.signature))) | |
659 | return sd_bus_reply_method_errorf(m, SD_BUS_ERROR_INVALID_ARGS, "Incorrect parameters for property '%s', expected '%s', got '%s'.", c->member, strempty(c->vtable->x.property.signature), strempty(signature)); | |
660 | ||
ebcf1f97 LP |
661 | r = sd_bus_message_enter_container(m, 'v', c->vtable->x.property.signature); |
662 | if (r < 0) | |
663 | return r; | |
992c052c | 664 | |
adacb957 LP |
665 | r = check_access(bus, m, c, &error); |
666 | if (r < 0) | |
667 | return bus_maybe_reply_error(m, r, &error); | |
668 | ||
19befb2d | 669 | r = invoke_property_set(bus, slot, c->vtable, m->path, c->interface, c->member, m, u, &error); |
ebcf1f97 | 670 | if (r < 0) |
f00c3121 | 671 | return bus_maybe_reply_error(m, r, &error); |
992c052c | 672 | |
68313d3d LP |
673 | if (bus->nodes_modified) |
674 | return 0; | |
675 | ||
992c052c LP |
676 | r = sd_bus_message_exit_container(m); |
677 | if (r < 0) | |
678 | return r; | |
679 | } | |
680 | ||
681 | r = sd_bus_send(bus, reply, NULL); | |
682 | if (r < 0) | |
683 | return r; | |
684 | ||
685 | return 1; | |
686 | } | |
687 | ||
a03e4337 LP |
688 | static int vtable_append_one_property( |
689 | sd_bus *bus, | |
690 | sd_bus_message *reply, | |
691 | const char *path, | |
692 | struct node_vtable *c, | |
693 | const sd_bus_vtable *v, | |
694 | void *userdata, | |
695 | sd_bus_error *error) { | |
696 | ||
19befb2d | 697 | sd_bus_slot *slot; |
a03e4337 LP |
698 | int r; |
699 | ||
700 | assert(bus); | |
701 | assert(reply); | |
702 | assert(path); | |
703 | assert(c); | |
704 | assert(v); | |
705 | ||
706 | r = sd_bus_message_open_container(reply, 'e', "sv"); | |
707 | if (r < 0) | |
708 | return r; | |
709 | ||
710 | r = sd_bus_message_append(reply, "s", v->x.property.member); | |
711 | if (r < 0) | |
712 | return r; | |
713 | ||
714 | r = sd_bus_message_open_container(reply, 'v', v->x.property.signature); | |
715 | if (r < 0) | |
716 | return r; | |
717 | ||
19befb2d LP |
718 | slot = container_of(c, sd_bus_slot, node_vtable); |
719 | ||
720 | r = invoke_property_get(bus, slot, v, path, c->interface, v->x.property.member, reply, vtable_property_convert_userdata(v, userdata), error); | |
a03e4337 LP |
721 | if (r < 0) |
722 | return r; | |
723 | if (bus->nodes_modified) | |
724 | return 0; | |
725 | ||
726 | r = sd_bus_message_close_container(reply); | |
727 | if (r < 0) | |
728 | return r; | |
729 | ||
730 | r = sd_bus_message_close_container(reply); | |
731 | if (r < 0) | |
732 | return r; | |
733 | ||
734 | return 0; | |
735 | } | |
736 | ||
992c052c LP |
737 | static int vtable_append_all_properties( |
738 | sd_bus *bus, | |
739 | sd_bus_message *reply, | |
740 | const char *path, | |
741 | struct node_vtable *c, | |
742 | void *userdata, | |
743 | sd_bus_error *error) { | |
744 | ||
745 | const sd_bus_vtable *v; | |
746 | int r; | |
747 | ||
748 | assert(bus); | |
749 | assert(reply); | |
dfa92725 | 750 | assert(path); |
992c052c LP |
751 | assert(c); |
752 | ||
6e8df5f0 LP |
753 | if (c->vtable[0].flags & SD_BUS_VTABLE_HIDDEN) |
754 | return 1; | |
755 | ||
992c052c | 756 | for (v = c->vtable+1; v->type != _SD_BUS_VTABLE_END; v++) { |
945c2931 | 757 | if (!IN_SET(v->type, _SD_BUS_VTABLE_PROPERTY, _SD_BUS_VTABLE_WRITABLE_PROPERTY)) |
992c052c LP |
758 | continue; |
759 | ||
6e8df5f0 LP |
760 | if (v->flags & SD_BUS_VTABLE_HIDDEN) |
761 | continue; | |
762 | ||
33702051 LP |
763 | if (v->flags & SD_BUS_VTABLE_PROPERTY_EXPLICIT) |
764 | continue; | |
765 | ||
a03e4337 | 766 | r = vtable_append_one_property(bus, reply, path, c, v, userdata, error); |
f00c3121 LP |
767 | if (r < 0) |
768 | return r; | |
68313d3d LP |
769 | if (bus->nodes_modified) |
770 | return 0; | |
992c052c LP |
771 | } |
772 | ||
773 | return 1; | |
774 | } | |
775 | ||
776 | static int property_get_all_callbacks_run( | |
777 | sd_bus *bus, | |
778 | sd_bus_message *m, | |
779 | struct node_vtable *first, | |
780 | bool require_fallback, | |
781 | const char *iface, | |
782 | bool *found_object) { | |
783 | ||
4afd3348 | 784 | _cleanup_(sd_bus_message_unrefp) sd_bus_message *reply = NULL; |
992c052c | 785 | struct node_vtable *c; |
bd037038 | 786 | bool found_interface; |
992c052c LP |
787 | int r; |
788 | ||
789 | assert(bus); | |
790 | assert(m); | |
791 | assert(found_object); | |
792 | ||
df2d202e | 793 | r = sd_bus_message_new_method_return(m, &reply); |
992c052c LP |
794 | if (r < 0) |
795 | return r; | |
796 | ||
797 | r = sd_bus_message_open_container(reply, 'a', "{sv}"); | |
798 | if (r < 0) | |
799 | return r; | |
800 | ||
38911893 | 801 | found_interface = !iface || |
bd037038 LP |
802 | streq(iface, "org.freedesktop.DBus.Properties") || |
803 | streq(iface, "org.freedesktop.DBus.Peer") || | |
804 | streq(iface, "org.freedesktop.DBus.Introspectable"); | |
805 | ||
992c052c | 806 | LIST_FOREACH(vtables, c, first) { |
4afd3348 | 807 | _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL; |
992c052c LP |
808 | void *u; |
809 | ||
810 | if (require_fallback && !c->is_fallback) | |
811 | continue; | |
812 | ||
f00c3121 | 813 | r = node_vtable_get_userdata(bus, m->path, c, &u, &error); |
992c052c | 814 | if (r < 0) |
f00c3121 | 815 | return bus_maybe_reply_error(m, r, &error); |
68313d3d LP |
816 | if (bus->nodes_modified) |
817 | return 0; | |
992c052c LP |
818 | if (r == 0) |
819 | continue; | |
820 | ||
821 | *found_object = true; | |
822 | ||
823 | if (iface && !streq(c->interface, iface)) | |
824 | continue; | |
825 | found_interface = true; | |
826 | ||
992c052c LP |
827 | r = vtable_append_all_properties(bus, reply, m->path, c, u, &error); |
828 | if (r < 0) | |
f00c3121 | 829 | return bus_maybe_reply_error(m, r, &error); |
68313d3d LP |
830 | if (bus->nodes_modified) |
831 | return 0; | |
992c052c LP |
832 | } |
833 | ||
733e792b AJ |
834 | if (!*found_object) |
835 | return 0; | |
836 | ||
992c052c LP |
837 | if (!found_interface) { |
838 | r = sd_bus_reply_method_errorf( | |
df2d202e | 839 | m, |
40ca29a1 | 840 | SD_BUS_ERROR_UNKNOWN_INTERFACE, |
992c052c LP |
841 | "Unknown interface '%s'.", iface); |
842 | if (r < 0) | |
843 | return r; | |
844 | ||
845 | return 1; | |
846 | } | |
847 | ||
848 | r = sd_bus_message_close_container(reply); | |
849 | if (r < 0) | |
850 | return r; | |
851 | ||
852 | r = sd_bus_send(bus, reply, NULL); | |
853 | if (r < 0) | |
854 | return r; | |
855 | ||
856 | return 1; | |
857 | } | |
858 | ||
ff02f101 | 859 | static int bus_node_exists( |
dfa92725 LP |
860 | sd_bus *bus, |
861 | struct node *n, | |
862 | const char *path, | |
863 | bool require_fallback) { | |
864 | ||
992c052c LP |
865 | struct node_vtable *c; |
866 | struct node_callback *k; | |
ff02f101 | 867 | int r; |
992c052c LP |
868 | |
869 | assert(bus); | |
870 | assert(n); | |
dfa92725 | 871 | assert(path); |
992c052c LP |
872 | |
873 | /* Tests if there's anything attached directly to this node | |
874 | * for the specified path */ | |
875 | ||
ff02f101 DH |
876 | if (!require_fallback && (n->enumerators || n->object_managers)) |
877 | return true; | |
878 | ||
992c052c LP |
879 | LIST_FOREACH(callbacks, k, n->callbacks) { |
880 | if (require_fallback && !k->is_fallback) | |
881 | continue; | |
882 | ||
ff02f101 | 883 | return 1; |
992c052c LP |
884 | } |
885 | ||
886 | LIST_FOREACH(vtables, c, n->vtables) { | |
4afd3348 | 887 | _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL; |
992c052c LP |
888 | |
889 | if (require_fallback && !c->is_fallback) | |
890 | continue; | |
891 | ||
ff02f101 DH |
892 | r = node_vtable_get_userdata(bus, path, c, NULL, &error); |
893 | if (r != 0) | |
894 | return r; | |
68313d3d | 895 | if (bus->nodes_modified) |
ff02f101 | 896 | return 0; |
992c052c LP |
897 | } |
898 | ||
ff02f101 | 899 | return 0; |
992c052c LP |
900 | } |
901 | ||
902 | static int process_introspect( | |
903 | sd_bus *bus, | |
904 | sd_bus_message *m, | |
905 | struct node *n, | |
906 | bool require_fallback, | |
907 | bool *found_object) { | |
908 | ||
4afd3348 LP |
909 | _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL; |
910 | _cleanup_(sd_bus_message_unrefp) sd_bus_message *reply = NULL; | |
992c052c | 911 | _cleanup_set_free_free_ Set *s = NULL; |
718db961 | 912 | const char *previous_interface = NULL; |
992c052c LP |
913 | struct introspect intro; |
914 | struct node_vtable *c; | |
915 | bool empty; | |
916 | int r; | |
917 | ||
918 | assert(bus); | |
919 | assert(m); | |
920 | assert(n); | |
921 | assert(found_object); | |
922 | ||
44eb1add | 923 | r = get_child_nodes(bus, m->path, n, 0, &s, &error); |
992c052c | 924 | if (r < 0) |
f00c3121 | 925 | return bus_maybe_reply_error(m, r, &error); |
68313d3d LP |
926 | if (bus->nodes_modified) |
927 | return 0; | |
992c052c | 928 | |
7fb411f0 | 929 | r = introspect_begin(&intro, bus->trusted); |
992c052c LP |
930 | if (r < 0) |
931 | return r; | |
932 | ||
943c3f94 | 933 | r = introspect_write_default_interfaces(&intro, !require_fallback && n->object_managers); |
992c052c LP |
934 | if (r < 0) |
935 | return r; | |
936 | ||
937 | empty = set_isempty(s); | |
938 | ||
939 | LIST_FOREACH(vtables, c, n->vtables) { | |
940 | if (require_fallback && !c->is_fallback) | |
941 | continue; | |
942 | ||
f00c3121 LP |
943 | r = node_vtable_get_userdata(bus, m->path, c, NULL, &error); |
944 | if (r < 0) { | |
945 | r = bus_maybe_reply_error(m, r, &error); | |
946 | goto finish; | |
947 | } | |
948 | if (bus->nodes_modified) { | |
949 | r = 0; | |
950 | goto finish; | |
951 | } | |
992c052c LP |
952 | if (r == 0) |
953 | continue; | |
954 | ||
955 | empty = false; | |
956 | ||
6e8df5f0 LP |
957 | if (c->vtable[0].flags & SD_BUS_VTABLE_HIDDEN) |
958 | continue; | |
959 | ||
718db961 LP |
960 | if (!streq_ptr(previous_interface, c->interface)) { |
961 | ||
962 | if (previous_interface) | |
0d536673 | 963 | fputs(" </interface>\n", intro.f); |
718db961 LP |
964 | |
965 | fprintf(intro.f, " <interface name=\"%s\">\n", c->interface); | |
966 | } | |
967 | ||
968 | r = introspect_write_interface(&intro, c->vtable); | |
992c052c LP |
969 | if (r < 0) |
970 | goto finish; | |
718db961 LP |
971 | |
972 | previous_interface = c->interface; | |
992c052c LP |
973 | } |
974 | ||
718db961 | 975 | if (previous_interface) |
0d536673 | 976 | fputs(" </interface>\n", intro.f); |
718db961 | 977 | |
992c052c LP |
978 | if (empty) { |
979 | /* Nothing?, let's see if we exist at all, and if not | |
980 | * refuse to do anything */ | |
981 | r = bus_node_exists(bus, n, m->path, require_fallback); | |
f2bfc6ba LP |
982 | if (r <= 0) { |
983 | r = bus_maybe_reply_error(m, r, &error); | |
ff02f101 | 984 | goto finish; |
f2bfc6ba | 985 | } |
ff02f101 DH |
986 | if (bus->nodes_modified) { |
987 | r = 0; | |
992c052c | 988 | goto finish; |
ff02f101 | 989 | } |
992c052c LP |
990 | } |
991 | ||
992 | *found_object = true; | |
993 | ||
994 | r = introspect_write_child_nodes(&intro, s, m->path); | |
995 | if (r < 0) | |
996 | goto finish; | |
997 | ||
998 | r = introspect_finish(&intro, bus, m, &reply); | |
999 | if (r < 0) | |
1000 | goto finish; | |
1001 | ||
1002 | r = sd_bus_send(bus, reply, NULL); | |
1003 | if (r < 0) | |
1004 | goto finish; | |
1005 | ||
1006 | r = 1; | |
1007 | ||
1008 | finish: | |
1009 | introspect_free(&intro); | |
1010 | return r; | |
1011 | } | |
1012 | ||
992c052c LP |
1013 | static int object_manager_serialize_path( |
1014 | sd_bus *bus, | |
1015 | sd_bus_message *reply, | |
1016 | const char *prefix, | |
1017 | const char *path, | |
1018 | bool require_fallback, | |
1019 | sd_bus_error *error) { | |
1020 | ||
718db961 LP |
1021 | const char *previous_interface = NULL; |
1022 | bool found_something = false; | |
992c052c LP |
1023 | struct node_vtable *i; |
1024 | struct node *n; | |
1025 | int r; | |
1026 | ||
1027 | assert(bus); | |
1028 | assert(reply); | |
1029 | assert(prefix); | |
1030 | assert(path); | |
1031 | assert(error); | |
1032 | ||
1033 | n = hashmap_get(bus->nodes, prefix); | |
1034 | if (!n) | |
1035 | return 0; | |
1036 | ||
992c052c | 1037 | LIST_FOREACH(vtables, i, n->vtables) { |
92db139e | 1038 | void *u; |
992c052c LP |
1039 | |
1040 | if (require_fallback && !i->is_fallback) | |
1041 | continue; | |
1042 | ||
f00c3121 | 1043 | r = node_vtable_get_userdata(bus, path, i, &u, error); |
92db139e LP |
1044 | if (r < 0) |
1045 | return r; | |
68313d3d LP |
1046 | if (bus->nodes_modified) |
1047 | return 0; | |
92db139e LP |
1048 | if (r == 0) |
1049 | continue; | |
1050 | ||
1051 | if (!found_something) { | |
718db961 LP |
1052 | |
1053 | /* Open the object part */ | |
1054 | ||
92db139e LP |
1055 | r = sd_bus_message_open_container(reply, 'e', "oa{sa{sv}}"); |
1056 | if (r < 0) | |
1057 | return r; | |
1058 | ||
1059 | r = sd_bus_message_append(reply, "o", path); | |
1060 | if (r < 0) | |
1061 | return r; | |
1062 | ||
1063 | r = sd_bus_message_open_container(reply, 'a', "{sa{sv}}"); | |
1064 | if (r < 0) | |
1065 | return r; | |
1066 | ||
c0e7906d DH |
1067 | r = sd_bus_message_append(reply, "{sa{sv}}", "org.freedesktop.DBus.Peer", 0); |
1068 | if (r < 0) | |
1069 | return r; | |
1070 | ||
1071 | r = sd_bus_message_append(reply, "{sa{sv}}", "org.freedesktop.DBus.Introspectable", 0); | |
1072 | if (r < 0) | |
1073 | return r; | |
1074 | ||
1075 | r = sd_bus_message_append(reply, "{sa{sv}}", "org.freedesktop.DBus.Properties", 0); | |
1076 | if (r < 0) | |
1077 | return r; | |
1078 | ||
1079 | r = sd_bus_message_append(reply, "{sa{sv}}", "org.freedesktop.DBus.ObjectManager", 0); | |
1080 | if (r < 0) | |
1081 | return r; | |
1082 | ||
92db139e LP |
1083 | found_something = true; |
1084 | } | |
1085 | ||
718db961 LP |
1086 | if (!streq_ptr(previous_interface, i->interface)) { |
1087 | ||
1088 | /* Maybe close the previous interface part */ | |
1089 | ||
1090 | if (previous_interface) { | |
1091 | r = sd_bus_message_close_container(reply); | |
1092 | if (r < 0) | |
1093 | return r; | |
1094 | ||
1095 | r = sd_bus_message_close_container(reply); | |
1096 | if (r < 0) | |
1097 | return r; | |
1098 | } | |
1099 | ||
1100 | /* Open the new interface part */ | |
1101 | ||
1102 | r = sd_bus_message_open_container(reply, 'e', "sa{sv}"); | |
1103 | if (r < 0) | |
1104 | return r; | |
1105 | ||
1106 | r = sd_bus_message_append(reply, "s", i->interface); | |
1107 | if (r < 0) | |
1108 | return r; | |
1109 | ||
1110 | r = sd_bus_message_open_container(reply, 'a', "{sv}"); | |
1111 | if (r < 0) | |
1112 | return r; | |
1113 | } | |
1114 | ||
1115 | r = vtable_append_all_properties(bus, reply, path, i, u, error); | |
992c052c LP |
1116 | if (r < 0) |
1117 | return r; | |
68313d3d LP |
1118 | if (bus->nodes_modified) |
1119 | return 0; | |
718db961 LP |
1120 | |
1121 | previous_interface = i->interface; | |
1122 | } | |
1123 | ||
1124 | if (previous_interface) { | |
1125 | r = sd_bus_message_close_container(reply); | |
1126 | if (r < 0) | |
1127 | return r; | |
1128 | ||
1129 | r = sd_bus_message_close_container(reply); | |
1130 | if (r < 0) | |
1131 | return r; | |
992c052c LP |
1132 | } |
1133 | ||
92db139e LP |
1134 | if (found_something) { |
1135 | r = sd_bus_message_close_container(reply); | |
1136 | if (r < 0) | |
1137 | return r; | |
992c052c | 1138 | |
92db139e LP |
1139 | r = sd_bus_message_close_container(reply); |
1140 | if (r < 0) | |
1141 | return r; | |
1142 | } | |
992c052c LP |
1143 | |
1144 | return 1; | |
1145 | } | |
1146 | ||
1147 | static int object_manager_serialize_path_and_fallbacks( | |
1148 | sd_bus *bus, | |
1149 | sd_bus_message *reply, | |
1150 | const char *path, | |
1151 | sd_bus_error *error) { | |
1152 | ||
92e189e5 | 1153 | char *prefix; |
992c052c LP |
1154 | int r; |
1155 | ||
1156 | assert(bus); | |
1157 | assert(reply); | |
1158 | assert(path); | |
1159 | assert(error); | |
1160 | ||
1161 | /* First, add all vtables registered for this path */ | |
1162 | r = object_manager_serialize_path(bus, reply, path, path, false, error); | |
1163 | if (r < 0) | |
1164 | return r; | |
68313d3d LP |
1165 | if (bus->nodes_modified) |
1166 | return 0; | |
992c052c LP |
1167 | |
1168 | /* Second, add fallback vtables registered for any of the prefixes */ | |
92e189e5 LP |
1169 | prefix = alloca(strlen(path) + 1); |
1170 | OBJECT_PATH_FOREACH_PREFIX(prefix, path) { | |
1171 | r = object_manager_serialize_path(bus, reply, prefix, path, true, error); | |
1172 | if (r < 0) | |
1173 | return r; | |
68313d3d LP |
1174 | if (bus->nodes_modified) |
1175 | return 0; | |
992c052c LP |
1176 | } |
1177 | ||
1178 | return 0; | |
1179 | } | |
1180 | ||
1181 | static int process_get_managed_objects( | |
1182 | sd_bus *bus, | |
1183 | sd_bus_message *m, | |
1184 | struct node *n, | |
1185 | bool require_fallback, | |
1186 | bool *found_object) { | |
1187 | ||
4afd3348 LP |
1188 | _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL; |
1189 | _cleanup_(sd_bus_message_unrefp) sd_bus_message *reply = NULL; | |
992c052c | 1190 | _cleanup_set_free_free_ Set *s = NULL; |
943c3f94 DH |
1191 | Iterator i; |
1192 | char *path; | |
992c052c LP |
1193 | int r; |
1194 | ||
1195 | assert(bus); | |
1196 | assert(m); | |
1197 | assert(n); | |
1198 | assert(found_object); | |
1199 | ||
943c3f94 DH |
1200 | /* Spec says, GetManagedObjects() is only implemented on the root of a |
1201 | * sub-tree. Therefore, we require a registered object-manager on | |
1202 | * exactly the queried path, otherwise, we refuse to respond. */ | |
1203 | ||
1204 | if (require_fallback || !n->object_managers) | |
992c052c LP |
1205 | return 0; |
1206 | ||
44eb1add | 1207 | r = get_child_nodes(bus, m->path, n, CHILDREN_RECURSIVE, &s, &error); |
992c052c | 1208 | if (r < 0) |
f2bfc6ba | 1209 | return bus_maybe_reply_error(m, r, &error); |
68313d3d LP |
1210 | if (bus->nodes_modified) |
1211 | return 0; | |
992c052c | 1212 | |
df2d202e | 1213 | r = sd_bus_message_new_method_return(m, &reply); |
992c052c LP |
1214 | if (r < 0) |
1215 | return r; | |
1216 | ||
1217 | r = sd_bus_message_open_container(reply, 'a', "{oa{sa{sv}}}"); | |
1218 | if (r < 0) | |
1219 | return r; | |
1220 | ||
943c3f94 DH |
1221 | SET_FOREACH(path, s, i) { |
1222 | r = object_manager_serialize_path_and_fallbacks(bus, reply, path, &error); | |
1223 | if (r < 0) | |
f2bfc6ba | 1224 | return bus_maybe_reply_error(m, r, &error); |
992c052c | 1225 | |
943c3f94 | 1226 | if (bus->nodes_modified) |
992c052c | 1227 | return 0; |
992c052c LP |
1228 | } |
1229 | ||
1230 | r = sd_bus_message_close_container(reply); | |
1231 | if (r < 0) | |
1232 | return r; | |
1233 | ||
1234 | r = sd_bus_send(bus, reply, NULL); | |
1235 | if (r < 0) | |
1236 | return r; | |
1237 | ||
1238 | return 1; | |
1239 | } | |
1240 | ||
1241 | static int object_find_and_run( | |
1242 | sd_bus *bus, | |
1243 | sd_bus_message *m, | |
1244 | const char *p, | |
1245 | bool require_fallback, | |
1246 | bool *found_object) { | |
1247 | ||
1248 | struct node *n; | |
1249 | struct vtable_member vtable_key, *v; | |
1250 | int r; | |
1251 | ||
1252 | assert(bus); | |
1253 | assert(m); | |
1254 | assert(p); | |
1255 | assert(found_object); | |
1256 | ||
1257 | n = hashmap_get(bus->nodes, p); | |
1258 | if (!n) | |
1259 | return 0; | |
1260 | ||
1261 | /* First, try object callbacks */ | |
1262 | r = node_callbacks_run(bus, m, n->callbacks, require_fallback, found_object); | |
1263 | if (r != 0) | |
1264 | return r; | |
68313d3d LP |
1265 | if (bus->nodes_modified) |
1266 | return 0; | |
992c052c LP |
1267 | |
1268 | if (!m->interface || !m->member) | |
1269 | return 0; | |
1270 | ||
1271 | /* Then, look for a known method */ | |
1272 | vtable_key.path = (char*) p; | |
1273 | vtable_key.interface = m->interface; | |
1274 | vtable_key.member = m->member; | |
1275 | ||
1276 | v = hashmap_get(bus->vtable_methods, &vtable_key); | |
1277 | if (v) { | |
1278 | r = method_callbacks_run(bus, m, v, require_fallback, found_object); | |
1279 | if (r != 0) | |
1280 | return r; | |
68313d3d LP |
1281 | if (bus->nodes_modified) |
1282 | return 0; | |
992c052c LP |
1283 | } |
1284 | ||
1285 | /* Then, look for a known property */ | |
1286 | if (streq(m->interface, "org.freedesktop.DBus.Properties")) { | |
1287 | bool get = false; | |
1288 | ||
1289 | get = streq(m->member, "Get"); | |
1290 | ||
1291 | if (get || streq(m->member, "Set")) { | |
1292 | ||
1293 | r = sd_bus_message_rewind(m, true); | |
1294 | if (r < 0) | |
1295 | return r; | |
1296 | ||
1297 | vtable_key.path = (char*) p; | |
1298 | ||
1299 | r = sd_bus_message_read(m, "ss", &vtable_key.interface, &vtable_key.member); | |
1300 | if (r < 0) | |
0fc5ab90 | 1301 | return sd_bus_reply_method_errorf(m, SD_BUS_ERROR_INVALID_ARGS, "Expected interface and member parameters"); |
992c052c LP |
1302 | |
1303 | v = hashmap_get(bus->vtable_properties, &vtable_key); | |
1304 | if (v) { | |
1305 | r = property_get_set_callbacks_run(bus, m, v, require_fallback, get, found_object); | |
1306 | if (r != 0) | |
1307 | return r; | |
1308 | } | |
1309 | ||
1310 | } else if (streq(m->member, "GetAll")) { | |
1311 | const char *iface; | |
1312 | ||
1313 | r = sd_bus_message_rewind(m, true); | |
1314 | if (r < 0) | |
1315 | return r; | |
1316 | ||
1317 | r = sd_bus_message_read(m, "s", &iface); | |
1318 | if (r < 0) | |
0fc5ab90 | 1319 | return sd_bus_reply_method_errorf(m, SD_BUS_ERROR_INVALID_ARGS, "Expected interface parameter"); |
992c052c LP |
1320 | |
1321 | if (iface[0] == 0) | |
1322 | iface = NULL; | |
1323 | ||
1324 | r = property_get_all_callbacks_run(bus, m, n->vtables, require_fallback, iface, found_object); | |
1325 | if (r != 0) | |
1326 | return r; | |
1327 | } | |
1328 | ||
1329 | } else if (sd_bus_message_is_method_call(m, "org.freedesktop.DBus.Introspectable", "Introspect")) { | |
1330 | ||
0fc5ab90 LP |
1331 | if (!isempty(sd_bus_message_get_signature(m, true))) |
1332 | return sd_bus_reply_method_errorf(m, SD_BUS_ERROR_INVALID_ARGS, "Expected no parameters"); | |
1333 | ||
992c052c LP |
1334 | r = process_introspect(bus, m, n, require_fallback, found_object); |
1335 | if (r != 0) | |
1336 | return r; | |
1337 | ||
1338 | } else if (sd_bus_message_is_method_call(m, "org.freedesktop.DBus.ObjectManager", "GetManagedObjects")) { | |
1339 | ||
0fc5ab90 LP |
1340 | if (!isempty(sd_bus_message_get_signature(m, true))) |
1341 | return sd_bus_reply_method_errorf(m, SD_BUS_ERROR_INVALID_ARGS, "Expected no parameters"); | |
1342 | ||
992c052c LP |
1343 | r = process_get_managed_objects(bus, m, n, require_fallback, found_object); |
1344 | if (r != 0) | |
1345 | return r; | |
1346 | } | |
1347 | ||
68313d3d LP |
1348 | if (bus->nodes_modified) |
1349 | return 0; | |
1350 | ||
992c052c LP |
1351 | if (!*found_object) { |
1352 | r = bus_node_exists(bus, n, m->path, require_fallback); | |
1353 | if (r < 0) | |
f2bfc6ba | 1354 | return bus_maybe_reply_error(m, r, NULL); |
ff02f101 DH |
1355 | if (bus->nodes_modified) |
1356 | return 0; | |
992c052c LP |
1357 | if (r > 0) |
1358 | *found_object = true; | |
1359 | } | |
1360 | ||
1361 | return 0; | |
1362 | } | |
1363 | ||
1364 | int bus_process_object(sd_bus *bus, sd_bus_message *m) { | |
1365 | int r; | |
1366 | size_t pl; | |
1367 | bool found_object = false; | |
1368 | ||
1369 | assert(bus); | |
1370 | assert(m); | |
1371 | ||
c7db1984 | 1372 | if (bus->is_monitor) |
09365592 LP |
1373 | return 0; |
1374 | ||
40ca29a1 | 1375 | if (m->header->type != SD_BUS_MESSAGE_METHOD_CALL) |
992c052c LP |
1376 | return 0; |
1377 | ||
992c052c LP |
1378 | if (hashmap_isempty(bus->nodes)) |
1379 | return 0; | |
1380 | ||
f820cf99 LP |
1381 | /* Never respond to broadcast messages */ |
1382 | if (bus->bus_client && !m->destination) | |
1383 | return 0; | |
1384 | ||
adacb957 LP |
1385 | assert(m->path); |
1386 | assert(m->member); | |
1387 | ||
992c052c LP |
1388 | pl = strlen(m->path); |
1389 | do { | |
92e189e5 | 1390 | char prefix[pl+1]; |
992c052c LP |
1391 | |
1392 | bus->nodes_modified = false; | |
1393 | ||
1394 | r = object_find_and_run(bus, m, m->path, false, &found_object); | |
1395 | if (r != 0) | |
1396 | return r; | |
1397 | ||
1398 | /* Look for fallback prefixes */ | |
92e189e5 | 1399 | OBJECT_PATH_FOREACH_PREFIX(prefix, m->path) { |
992c052c LP |
1400 | |
1401 | if (bus->nodes_modified) | |
1402 | break; | |
1403 | ||
92e189e5 | 1404 | r = object_find_and_run(bus, m, prefix, true, &found_object); |
992c052c LP |
1405 | if (r != 0) |
1406 | return r; | |
1407 | } | |
1408 | ||
1409 | } while (bus->nodes_modified); | |
1410 | ||
1411 | if (!found_object) | |
1412 | return 0; | |
1413 | ||
1414 | if (sd_bus_message_is_method_call(m, "org.freedesktop.DBus.Properties", "Get") || | |
1415 | sd_bus_message_is_method_call(m, "org.freedesktop.DBus.Properties", "Set")) | |
1416 | r = sd_bus_reply_method_errorf( | |
df2d202e | 1417 | m, |
40ca29a1 | 1418 | SD_BUS_ERROR_UNKNOWN_PROPERTY, |
992c052c LP |
1419 | "Unknown property or interface."); |
1420 | else | |
1421 | r = sd_bus_reply_method_errorf( | |
df2d202e | 1422 | m, |
40ca29a1 | 1423 | SD_BUS_ERROR_UNKNOWN_METHOD, |
992c052c LP |
1424 | "Unknown method '%s' or interface '%s'.", m->member, m->interface); |
1425 | ||
1426 | if (r < 0) | |
1427 | return r; | |
1428 | ||
1429 | return 1; | |
1430 | } | |
1431 | ||
1432 | static struct node *bus_node_allocate(sd_bus *bus, const char *path) { | |
1433 | struct node *n, *parent; | |
1434 | const char *e; | |
2fd069b1 ZJS |
1435 | _cleanup_free_ char *s = NULL; |
1436 | char *p; | |
992c052c LP |
1437 | int r; |
1438 | ||
1439 | assert(bus); | |
1440 | assert(path); | |
1441 | assert(path[0] == '/'); | |
1442 | ||
1443 | n = hashmap_get(bus->nodes, path); | |
1444 | if (n) | |
1445 | return n; | |
1446 | ||
d5099efc | 1447 | r = hashmap_ensure_allocated(&bus->nodes, &string_hash_ops); |
992c052c LP |
1448 | if (r < 0) |
1449 | return NULL; | |
1450 | ||
1451 | s = strdup(path); | |
1452 | if (!s) | |
1453 | return NULL; | |
1454 | ||
1455 | if (streq(path, "/")) | |
1456 | parent = NULL; | |
1457 | else { | |
1458 | e = strrchr(path, '/'); | |
1459 | assert(e); | |
1460 | ||
7d67077f | 1461 | p = strndupa(path, MAX(1, e - path)); |
992c052c LP |
1462 | |
1463 | parent = bus_node_allocate(bus, p); | |
2fd069b1 | 1464 | if (!parent) |
992c052c | 1465 | return NULL; |
992c052c LP |
1466 | } |
1467 | ||
1468 | n = new0(struct node, 1); | |
1469 | if (!n) | |
1470 | return NULL; | |
1471 | ||
1472 | n->parent = parent; | |
ae2a15bc | 1473 | n->path = TAKE_PTR(s); |
992c052c | 1474 | |
8e050193 | 1475 | r = hashmap_put(bus->nodes, n->path, n); |
992c052c | 1476 | if (r < 0) { |
2fd069b1 | 1477 | free(n->path); |
5fecf46d | 1478 | return mfree(n); |
992c052c LP |
1479 | } |
1480 | ||
1481 | if (parent) | |
71fda00f | 1482 | LIST_PREPEND(siblings, parent->child, n); |
992c052c LP |
1483 | |
1484 | return n; | |
1485 | } | |
1486 | ||
19befb2d | 1487 | void bus_node_gc(sd_bus *b, struct node *n) { |
992c052c LP |
1488 | assert(b); |
1489 | ||
1490 | if (!n) | |
1491 | return; | |
1492 | ||
1493 | if (n->child || | |
1494 | n->callbacks || | |
1495 | n->vtables || | |
1496 | n->enumerators || | |
19befb2d | 1497 | n->object_managers) |
992c052c LP |
1498 | return; |
1499 | ||
85e55d14 | 1500 | assert_se(hashmap_remove(b->nodes, n->path) == n); |
992c052c LP |
1501 | |
1502 | if (n->parent) | |
71fda00f | 1503 | LIST_REMOVE(siblings, n->parent->child, n); |
992c052c LP |
1504 | |
1505 | free(n->path); | |
1506 | bus_node_gc(b, n->parent); | |
1507 | free(n); | |
1508 | } | |
1509 | ||
2d5c8a27 DH |
1510 | static int bus_find_parent_object_manager(sd_bus *bus, struct node **out, const char *path) { |
1511 | struct node *n; | |
1512 | ||
1513 | assert(bus); | |
1514 | assert(path); | |
1515 | ||
1516 | n = hashmap_get(bus->nodes, path); | |
1517 | if (!n) { | |
1518 | char *prefix; | |
1519 | ||
1520 | prefix = alloca(strlen(path) + 1); | |
1521 | OBJECT_PATH_FOREACH_PREFIX(prefix, path) { | |
1522 | n = hashmap_get(bus->nodes, prefix); | |
1523 | if (n) | |
1524 | break; | |
1525 | } | |
1526 | } | |
1527 | ||
1528 | while (n && !n->object_managers) | |
1529 | n = n->parent; | |
1530 | ||
1531 | if (out) | |
1532 | *out = n; | |
1533 | return !!n; | |
1534 | } | |
1535 | ||
992c052c | 1536 | static int bus_add_object( |
dfa92725 | 1537 | sd_bus *bus, |
19befb2d | 1538 | sd_bus_slot **slot, |
992c052c LP |
1539 | bool fallback, |
1540 | const char *path, | |
1541 | sd_bus_message_handler_t callback, | |
1542 | void *userdata) { | |
1543 | ||
19befb2d | 1544 | sd_bus_slot *s; |
992c052c LP |
1545 | struct node *n; |
1546 | int r; | |
1547 | ||
dfa92725 | 1548 | assert_return(bus, -EINVAL); |
45b1f410 | 1549 | assert_return(bus = bus_resolve(bus), -ENOPKG); |
dfa92725 LP |
1550 | assert_return(object_path_is_valid(path), -EINVAL); |
1551 | assert_return(callback, -EINVAL); | |
1552 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
992c052c | 1553 | |
dfa92725 | 1554 | n = bus_node_allocate(bus, path); |
992c052c LP |
1555 | if (!n) |
1556 | return -ENOMEM; | |
1557 | ||
19befb2d LP |
1558 | s = bus_slot_allocate(bus, !slot, BUS_NODE_CALLBACK, sizeof(struct node_callback), userdata); |
1559 | if (!s) { | |
992c052c LP |
1560 | r = -ENOMEM; |
1561 | goto fail; | |
1562 | } | |
1563 | ||
19befb2d LP |
1564 | s->node_callback.callback = callback; |
1565 | s->node_callback.is_fallback = fallback; | |
992c052c | 1566 | |
19befb2d LP |
1567 | s->node_callback.node = n; |
1568 | LIST_PREPEND(callbacks, n->callbacks, &s->node_callback); | |
68313d3d LP |
1569 | bus->nodes_modified = true; |
1570 | ||
19befb2d LP |
1571 | if (slot) |
1572 | *slot = s; | |
1573 | ||
992c052c LP |
1574 | return 0; |
1575 | ||
1576 | fail: | |
19befb2d | 1577 | sd_bus_slot_unref(s); |
dfa92725 | 1578 | bus_node_gc(bus, n); |
19befb2d | 1579 | |
992c052c LP |
1580 | return r; |
1581 | } | |
1582 | ||
19befb2d | 1583 | _public_ int sd_bus_add_object( |
992c052c | 1584 | sd_bus *bus, |
19befb2d | 1585 | sd_bus_slot **slot, |
992c052c LP |
1586 | const char *path, |
1587 | sd_bus_message_handler_t callback, | |
1588 | void *userdata) { | |
1589 | ||
19befb2d | 1590 | return bus_add_object(bus, slot, false, path, callback, userdata); |
992c052c LP |
1591 | } |
1592 | ||
19befb2d LP |
1593 | _public_ int sd_bus_add_fallback( |
1594 | sd_bus *bus, | |
1595 | sd_bus_slot **slot, | |
1596 | const char *prefix, | |
1597 | sd_bus_message_handler_t callback, | |
1598 | void *userdata) { | |
992c052c | 1599 | |
19befb2d | 1600 | return bus_add_object(bus, slot, true, prefix, callback, userdata); |
992c052c LP |
1601 | } |
1602 | ||
b826ab58 | 1603 | static void vtable_member_hash_func(const void *a, struct siphash *state) { |
992c052c LP |
1604 | const struct vtable_member *m = a; |
1605 | ||
dfa92725 LP |
1606 | assert(m); |
1607 | ||
b826ab58 TG |
1608 | string_hash_func(m->path, state); |
1609 | string_hash_func(m->interface, state); | |
1610 | string_hash_func(m->member, state); | |
992c052c LP |
1611 | } |
1612 | ||
1613 | static int vtable_member_compare_func(const void *a, const void *b) { | |
1614 | const struct vtable_member *x = a, *y = b; | |
1615 | int r; | |
1616 | ||
dfa92725 LP |
1617 | assert(x); |
1618 | assert(y); | |
1619 | ||
992c052c LP |
1620 | r = strcmp(x->path, y->path); |
1621 | if (r != 0) | |
1622 | return r; | |
1623 | ||
1624 | r = strcmp(x->interface, y->interface); | |
1625 | if (r != 0) | |
1626 | return r; | |
1627 | ||
1628 | return strcmp(x->member, y->member); | |
1629 | } | |
1630 | ||
d5099efc MS |
1631 | static const struct hash_ops vtable_member_hash_ops = { |
1632 | .hash = vtable_member_hash_func, | |
1633 | .compare = vtable_member_compare_func | |
1634 | }; | |
1635 | ||
992c052c LP |
1636 | static int add_object_vtable_internal( |
1637 | sd_bus *bus, | |
19befb2d | 1638 | sd_bus_slot **slot, |
992c052c LP |
1639 | const char *path, |
1640 | const char *interface, | |
1641 | const sd_bus_vtable *vtable, | |
1642 | bool fallback, | |
1643 | sd_bus_object_find_t find, | |
1644 | void *userdata) { | |
1645 | ||
2915234d | 1646 | sd_bus_slot *s = NULL; |
19befb2d | 1647 | struct node_vtable *i, *existing = NULL; |
992c052c LP |
1648 | const sd_bus_vtable *v; |
1649 | struct node *n; | |
1650 | int r; | |
1651 | ||
dfa92725 | 1652 | assert_return(bus, -EINVAL); |
45b1f410 | 1653 | assert_return(bus = bus_resolve(bus), -ENOPKG); |
dfa92725 LP |
1654 | assert_return(object_path_is_valid(path), -EINVAL); |
1655 | assert_return(interface_name_is_valid(interface), -EINVAL); | |
1656 | assert_return(vtable, -EINVAL); | |
1657 | assert_return(vtable[0].type == _SD_BUS_VTABLE_START, -EINVAL); | |
1658 | assert_return(vtable[0].x.start.element_size == sizeof(struct sd_bus_vtable), -EINVAL); | |
1659 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
718db961 LP |
1660 | assert_return(!streq(interface, "org.freedesktop.DBus.Properties") && |
1661 | !streq(interface, "org.freedesktop.DBus.Introspectable") && | |
1662 | !streq(interface, "org.freedesktop.DBus.Peer") && | |
1663 | !streq(interface, "org.freedesktop.DBus.ObjectManager"), -EINVAL); | |
992c052c | 1664 | |
d5099efc | 1665 | r = hashmap_ensure_allocated(&bus->vtable_methods, &vtable_member_hash_ops); |
992c052c LP |
1666 | if (r < 0) |
1667 | return r; | |
1668 | ||
d5099efc | 1669 | r = hashmap_ensure_allocated(&bus->vtable_properties, &vtable_member_hash_ops); |
992c052c LP |
1670 | if (r < 0) |
1671 | return r; | |
1672 | ||
1673 | n = bus_node_allocate(bus, path); | |
1674 | if (!n) | |
1675 | return -ENOMEM; | |
1676 | ||
1677 | LIST_FOREACH(vtables, i, n->vtables) { | |
992c052c LP |
1678 | if (i->is_fallback != fallback) { |
1679 | r = -EPROTOTYPE; | |
1680 | goto fail; | |
1681 | } | |
718db961 LP |
1682 | |
1683 | if (streq(i->interface, interface)) { | |
1684 | ||
1685 | if (i->vtable == vtable) { | |
1686 | r = -EEXIST; | |
1687 | goto fail; | |
1688 | } | |
1689 | ||
1690 | existing = i; | |
1691 | } | |
992c052c LP |
1692 | } |
1693 | ||
19befb2d LP |
1694 | s = bus_slot_allocate(bus, !slot, BUS_NODE_VTABLE, sizeof(struct node_vtable), userdata); |
1695 | if (!s) { | |
992c052c LP |
1696 | r = -ENOMEM; |
1697 | goto fail; | |
1698 | } | |
1699 | ||
19befb2d LP |
1700 | s->node_vtable.is_fallback = fallback; |
1701 | s->node_vtable.vtable = vtable; | |
1702 | s->node_vtable.find = find; | |
992c052c | 1703 | |
19befb2d LP |
1704 | s->node_vtable.interface = strdup(interface); |
1705 | if (!s->node_vtable.interface) { | |
992c052c LP |
1706 | r = -ENOMEM; |
1707 | goto fail; | |
1708 | } | |
1709 | ||
19befb2d | 1710 | for (v = s->node_vtable.vtable+1; v->type != _SD_BUS_VTABLE_END; v++) { |
992c052c LP |
1711 | |
1712 | switch (v->type) { | |
1713 | ||
1714 | case _SD_BUS_VTABLE_METHOD: { | |
1715 | struct vtable_member *m; | |
1716 | ||
77a874a3 LP |
1717 | if (!member_name_is_valid(v->x.method.member) || |
1718 | !signature_is_valid(strempty(v->x.method.signature), false) || | |
1719 | !signature_is_valid(strempty(v->x.method.result), false) || | |
1720 | !(v->x.method.handler || (isempty(v->x.method.signature) && isempty(v->x.method.result))) || | |
df98a87b | 1721 | v->flags & (SD_BUS_VTABLE_PROPERTY_CONST|SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE|SD_BUS_VTABLE_PROPERTY_EMITS_INVALIDATION)) { |
992c052c LP |
1722 | r = -EINVAL; |
1723 | goto fail; | |
1724 | } | |
1725 | ||
1726 | m = new0(struct vtable_member, 1); | |
1727 | if (!m) { | |
1728 | r = -ENOMEM; | |
1729 | goto fail; | |
1730 | } | |
1731 | ||
19befb2d | 1732 | m->parent = &s->node_vtable; |
992c052c | 1733 | m->path = n->path; |
19befb2d | 1734 | m->interface = s->node_vtable.interface; |
77a874a3 | 1735 | m->member = v->x.method.member; |
992c052c LP |
1736 | m->vtable = v; |
1737 | ||
1738 | r = hashmap_put(bus->vtable_methods, m, m); | |
1739 | if (r < 0) { | |
1740 | free(m); | |
1741 | goto fail; | |
1742 | } | |
1743 | ||
1744 | break; | |
1745 | } | |
1746 | ||
1747 | case _SD_BUS_VTABLE_WRITABLE_PROPERTY: | |
1748 | ||
77a874a3 | 1749 | if (!(v->x.property.set || bus_type_is_basic(v->x.property.signature[0]))) { |
992c052c LP |
1750 | r = -EINVAL; |
1751 | goto fail; | |
1752 | } | |
9b772efb LP |
1753 | |
1754 | if (v->flags & SD_BUS_VTABLE_PROPERTY_CONST) { | |
1755 | r = -EINVAL; | |
1756 | goto fail; | |
1757 | } | |
992c052c | 1758 | |
4831981d | 1759 | _fallthrough_; |
992c052c LP |
1760 | case _SD_BUS_VTABLE_PROPERTY: { |
1761 | struct vtable_member *m; | |
1762 | ||
77a874a3 LP |
1763 | if (!member_name_is_valid(v->x.property.member) || |
1764 | !signature_is_single(v->x.property.signature, false) || | |
c13c7de3 | 1765 | !(v->x.property.get || bus_type_is_basic(v->x.property.signature[0]) || streq(v->x.property.signature, "as")) || |
33702051 | 1766 | (v->flags & SD_BUS_VTABLE_METHOD_NO_REPLY) || |
df98a87b | 1767 | (!!(v->flags & SD_BUS_VTABLE_PROPERTY_CONST) + !!(v->flags & SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE) + !!(v->flags & SD_BUS_VTABLE_PROPERTY_EMITS_INVALIDATION)) > 1 || |
33702051 | 1768 | ((v->flags & SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE) && (v->flags & SD_BUS_VTABLE_PROPERTY_EXPLICIT)) || |
adacb957 | 1769 | (v->flags & SD_BUS_VTABLE_UNPRIVILEGED && v->type == _SD_BUS_VTABLE_PROPERTY)) { |
992c052c LP |
1770 | r = -EINVAL; |
1771 | goto fail; | |
1772 | } | |
1773 | ||
992c052c LP |
1774 | m = new0(struct vtable_member, 1); |
1775 | if (!m) { | |
1776 | r = -ENOMEM; | |
1777 | goto fail; | |
1778 | } | |
1779 | ||
19befb2d | 1780 | m->parent = &s->node_vtable; |
992c052c | 1781 | m->path = n->path; |
19befb2d | 1782 | m->interface = s->node_vtable.interface; |
77a874a3 | 1783 | m->member = v->x.property.member; |
992c052c LP |
1784 | m->vtable = v; |
1785 | ||
1786 | r = hashmap_put(bus->vtable_properties, m, m); | |
1787 | if (r < 0) { | |
1788 | free(m); | |
1789 | goto fail; | |
1790 | } | |
1791 | ||
1792 | break; | |
1793 | } | |
1794 | ||
1795 | case _SD_BUS_VTABLE_SIGNAL: | |
1796 | ||
77a874a3 | 1797 | if (!member_name_is_valid(v->x.signal.member) || |
adacb957 LP |
1798 | !signature_is_valid(strempty(v->x.signal.signature), false) || |
1799 | v->flags & SD_BUS_VTABLE_UNPRIVILEGED) { | |
992c052c LP |
1800 | r = -EINVAL; |
1801 | goto fail; | |
1802 | } | |
1803 | ||
1804 | break; | |
1805 | ||
1806 | default: | |
1807 | r = -EINVAL; | |
1808 | goto fail; | |
1809 | } | |
1810 | } | |
1811 | ||
19befb2d LP |
1812 | s->node_vtable.node = n; |
1813 | LIST_INSERT_AFTER(vtables, n->vtables, existing, &s->node_vtable); | |
68313d3d LP |
1814 | bus->nodes_modified = true; |
1815 | ||
19befb2d LP |
1816 | if (slot) |
1817 | *slot = s; | |
1818 | ||
992c052c LP |
1819 | return 0; |
1820 | ||
1821 | fail: | |
19befb2d | 1822 | sd_bus_slot_unref(s); |
dfa92725 LP |
1823 | bus_node_gc(bus, n); |
1824 | ||
19befb2d | 1825 | return r; |
992c052c LP |
1826 | } |
1827 | ||
d9f644e2 | 1828 | _public_ int sd_bus_add_object_vtable( |
992c052c | 1829 | sd_bus *bus, |
19befb2d | 1830 | sd_bus_slot **slot, |
992c052c LP |
1831 | const char *path, |
1832 | const char *interface, | |
1833 | const sd_bus_vtable *vtable, | |
1834 | void *userdata) { | |
1835 | ||
19befb2d | 1836 | return add_object_vtable_internal(bus, slot, path, interface, vtable, false, NULL, userdata); |
992c052c LP |
1837 | } |
1838 | ||
d9f644e2 | 1839 | _public_ int sd_bus_add_fallback_vtable( |
992c052c | 1840 | sd_bus *bus, |
19befb2d LP |
1841 | sd_bus_slot **slot, |
1842 | const char *prefix, | |
718db961 LP |
1843 | const char *interface, |
1844 | const sd_bus_vtable *vtable, | |
1845 | sd_bus_object_find_t find, | |
1846 | void *userdata) { | |
992c052c | 1847 | |
19befb2d | 1848 | return add_object_vtable_internal(bus, slot, prefix, interface, vtable, true, find, userdata); |
992c052c LP |
1849 | } |
1850 | ||
d9f644e2 | 1851 | _public_ int sd_bus_add_node_enumerator( |
992c052c | 1852 | sd_bus *bus, |
19befb2d | 1853 | sd_bus_slot **slot, |
992c052c LP |
1854 | const char *path, |
1855 | sd_bus_node_enumerator_t callback, | |
1856 | void *userdata) { | |
1857 | ||
19befb2d | 1858 | sd_bus_slot *s; |
992c052c LP |
1859 | struct node *n; |
1860 | int r; | |
1861 | ||
dfa92725 | 1862 | assert_return(bus, -EINVAL); |
45b1f410 | 1863 | assert_return(bus = bus_resolve(bus), -ENOPKG); |
dfa92725 LP |
1864 | assert_return(object_path_is_valid(path), -EINVAL); |
1865 | assert_return(callback, -EINVAL); | |
1866 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
992c052c LP |
1867 | |
1868 | n = bus_node_allocate(bus, path); | |
1869 | if (!n) | |
1870 | return -ENOMEM; | |
1871 | ||
19befb2d LP |
1872 | s = bus_slot_allocate(bus, !slot, BUS_NODE_ENUMERATOR, sizeof(struct node_enumerator), userdata); |
1873 | if (!s) { | |
992c052c LP |
1874 | r = -ENOMEM; |
1875 | goto fail; | |
1876 | } | |
1877 | ||
19befb2d | 1878 | s->node_enumerator.callback = callback; |
68313d3d | 1879 | |
19befb2d LP |
1880 | s->node_enumerator.node = n; |
1881 | LIST_PREPEND(enumerators, n->enumerators, &s->node_enumerator); | |
68313d3d LP |
1882 | bus->nodes_modified = true; |
1883 | ||
19befb2d LP |
1884 | if (slot) |
1885 | *slot = s; | |
1886 | ||
992c052c LP |
1887 | return 0; |
1888 | ||
1889 | fail: | |
19befb2d | 1890 | sd_bus_slot_unref(s); |
992c052c LP |
1891 | bus_node_gc(bus, n); |
1892 | ||
19befb2d | 1893 | return r; |
992c052c LP |
1894 | } |
1895 | ||
1896 | static int emit_properties_changed_on_interface( | |
1897 | sd_bus *bus, | |
1898 | const char *prefix, | |
1899 | const char *path, | |
1900 | const char *interface, | |
1901 | bool require_fallback, | |
46525bfc | 1902 | bool *found_interface, |
992c052c LP |
1903 | char **names) { |
1904 | ||
4afd3348 LP |
1905 | _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL; |
1906 | _cleanup_(sd_bus_message_unrefp) sd_bus_message *m = NULL; | |
718db961 LP |
1907 | bool has_invalidating = false, has_changing = false; |
1908 | struct vtable_member key = {}; | |
992c052c LP |
1909 | struct node_vtable *c; |
1910 | struct node *n; | |
1911 | char **property; | |
1912 | void *u = NULL; | |
1913 | int r; | |
1914 | ||
1915 | assert(bus); | |
dfa92725 | 1916 | assert(prefix); |
992c052c LP |
1917 | assert(path); |
1918 | assert(interface); | |
46525bfc | 1919 | assert(found_interface); |
992c052c LP |
1920 | |
1921 | n = hashmap_get(bus->nodes, prefix); | |
1922 | if (!n) | |
1923 | return 0; | |
1924 | ||
151b9b96 | 1925 | r = sd_bus_message_new_signal(bus, &m, path, "org.freedesktop.DBus.Properties", "PropertiesChanged"); |
992c052c LP |
1926 | if (r < 0) |
1927 | return r; | |
1928 | ||
1929 | r = sd_bus_message_append(m, "s", interface); | |
1930 | if (r < 0) | |
1931 | return r; | |
1932 | ||
1933 | r = sd_bus_message_open_container(m, 'a', "{sv}"); | |
1934 | if (r < 0) | |
1935 | return r; | |
1936 | ||
1937 | key.path = prefix; | |
1938 | key.interface = interface; | |
1939 | ||
718db961 LP |
1940 | LIST_FOREACH(vtables, c, n->vtables) { |
1941 | if (require_fallback && !c->is_fallback) | |
1942 | continue; | |
992c052c | 1943 | |
718db961 | 1944 | if (!streq(c->interface, interface)) |
992c052c | 1945 | continue; |
992c052c | 1946 | |
f00c3121 | 1947 | r = node_vtable_get_userdata(bus, path, c, &u, &error); |
992c052c LP |
1948 | if (r < 0) |
1949 | return r; | |
718db961 LP |
1950 | if (bus->nodes_modified) |
1951 | return 0; | |
1952 | if (r == 0) | |
1953 | continue; | |
992c052c | 1954 | |
46525bfc LP |
1955 | *found_interface = true; |
1956 | ||
a03e4337 LP |
1957 | if (names) { |
1958 | /* If the caller specified a list of | |
1959 | * properties we include exactly those in the | |
1960 | * PropertiesChanged message */ | |
992c052c | 1961 | |
a03e4337 LP |
1962 | STRV_FOREACH(property, names) { |
1963 | struct vtable_member *v; | |
992c052c | 1964 | |
a03e4337 | 1965 | assert_return(member_name_is_valid(*property), -EINVAL); |
718db961 | 1966 | |
a03e4337 LP |
1967 | key.member = *property; |
1968 | v = hashmap_get(bus->vtable_properties, &key); | |
1969 | if (!v) | |
1970 | return -ENOENT; | |
1971 | ||
1972 | /* If there are two vtables for the same | |
1973 | * interface, let's handle this property when | |
1974 | * we come to that vtable. */ | |
1975 | if (c != v->parent) | |
1976 | continue; | |
992c052c | 1977 | |
a03e4337 LP |
1978 | assert_return(v->vtable->flags & SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE || |
1979 | v->vtable->flags & SD_BUS_VTABLE_PROPERTY_EMITS_INVALIDATION, -EDOM); | |
992c052c | 1980 | |
a03e4337 LP |
1981 | assert_return(!(v->vtable->flags & SD_BUS_VTABLE_HIDDEN), -EDOM); |
1982 | ||
1983 | if (v->vtable->flags & SD_BUS_VTABLE_PROPERTY_EMITS_INVALIDATION) { | |
1984 | has_invalidating = true; | |
1985 | continue; | |
1986 | } | |
1987 | ||
1988 | has_changing = true; | |
1989 | ||
1990 | r = vtable_append_one_property(bus, m, m->path, c, v->vtable, u, &error); | |
1991 | if (r < 0) | |
1992 | return r; | |
1993 | if (bus->nodes_modified) | |
1994 | return 0; | |
718db961 | 1995 | } |
a03e4337 LP |
1996 | } else { |
1997 | const sd_bus_vtable *v; | |
718db961 | 1998 | |
a03e4337 LP |
1999 | /* If the caller specified no properties list |
2000 | * we include all properties that are marked | |
2001 | * as changing in the message. */ | |
718db961 | 2002 | |
a03e4337 | 2003 | for (v = c->vtable+1; v->type != _SD_BUS_VTABLE_END; v++) { |
945c2931 | 2004 | if (!IN_SET(v->type, _SD_BUS_VTABLE_PROPERTY, _SD_BUS_VTABLE_WRITABLE_PROPERTY)) |
a03e4337 | 2005 | continue; |
718db961 | 2006 | |
a03e4337 LP |
2007 | if (v->flags & SD_BUS_VTABLE_HIDDEN) |
2008 | continue; | |
718db961 | 2009 | |
a03e4337 LP |
2010 | if (v->flags & SD_BUS_VTABLE_PROPERTY_EMITS_INVALIDATION) { |
2011 | has_invalidating = true; | |
2012 | continue; | |
2013 | } | |
718db961 | 2014 | |
a03e4337 LP |
2015 | if (!(v->flags & SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE)) |
2016 | continue; | |
718db961 | 2017 | |
a03e4337 | 2018 | has_changing = true; |
718db961 | 2019 | |
a03e4337 LP |
2020 | r = vtable_append_one_property(bus, m, m->path, c, v, u, &error); |
2021 | if (r < 0) | |
2022 | return r; | |
2023 | if (bus->nodes_modified) | |
2024 | return 0; | |
2025 | } | |
718db961 | 2026 | } |
992c052c LP |
2027 | } |
2028 | ||
718db961 LP |
2029 | if (!has_invalidating && !has_changing) |
2030 | return 0; | |
2031 | ||
992c052c LP |
2032 | r = sd_bus_message_close_container(m); |
2033 | if (r < 0) | |
2034 | return r; | |
2035 | ||
2036 | r = sd_bus_message_open_container(m, 'a', "s"); | |
2037 | if (r < 0) | |
2038 | return r; | |
2039 | ||
2040 | if (has_invalidating) { | |
718db961 LP |
2041 | LIST_FOREACH(vtables, c, n->vtables) { |
2042 | if (require_fallback && !c->is_fallback) | |
2043 | continue; | |
992c052c | 2044 | |
718db961 | 2045 | if (!streq(c->interface, interface)) |
992c052c LP |
2046 | continue; |
2047 | ||
f00c3121 | 2048 | r = node_vtable_get_userdata(bus, path, c, &u, &error); |
992c052c LP |
2049 | if (r < 0) |
2050 | return r; | |
718db961 LP |
2051 | if (bus->nodes_modified) |
2052 | return 0; | |
2053 | if (r == 0) | |
2054 | continue; | |
2055 | ||
a03e4337 LP |
2056 | if (names) { |
2057 | STRV_FOREACH(property, names) { | |
2058 | struct vtable_member *v; | |
718db961 | 2059 | |
a03e4337 LP |
2060 | key.member = *property; |
2061 | assert_se(v = hashmap_get(bus->vtable_properties, &key)); | |
2062 | assert(c == v->parent); | |
718db961 | 2063 | |
a03e4337 LP |
2064 | if (!(v->vtable->flags & SD_BUS_VTABLE_PROPERTY_EMITS_INVALIDATION)) |
2065 | continue; | |
718db961 | 2066 | |
a03e4337 LP |
2067 | r = sd_bus_message_append(m, "s", *property); |
2068 | if (r < 0) | |
2069 | return r; | |
2070 | } | |
2071 | } else { | |
2072 | const sd_bus_vtable *v; | |
2073 | ||
2074 | for (v = c->vtable+1; v->type != _SD_BUS_VTABLE_END; v++) { | |
945c2931 | 2075 | if (!IN_SET(v->type, _SD_BUS_VTABLE_PROPERTY, _SD_BUS_VTABLE_WRITABLE_PROPERTY)) |
a03e4337 LP |
2076 | continue; |
2077 | ||
2078 | if (v->flags & SD_BUS_VTABLE_HIDDEN) | |
2079 | continue; | |
2080 | ||
2081 | if (!(v->flags & SD_BUS_VTABLE_PROPERTY_EMITS_INVALIDATION)) | |
2082 | continue; | |
2083 | ||
2084 | r = sd_bus_message_append(m, "s", v->x.property.member); | |
2085 | if (r < 0) | |
2086 | return r; | |
2087 | } | |
718db961 | 2088 | } |
992c052c LP |
2089 | } |
2090 | } | |
2091 | ||
2092 | r = sd_bus_message_close_container(m); | |
2093 | if (r < 0) | |
2094 | return r; | |
2095 | ||
2096 | r = sd_bus_send(bus, m, NULL); | |
2097 | if (r < 0) | |
2098 | return r; | |
2099 | ||
2100 | return 1; | |
2101 | } | |
2102 | ||
d9f644e2 | 2103 | _public_ int sd_bus_emit_properties_changed_strv( |
dfa92725 LP |
2104 | sd_bus *bus, |
2105 | const char *path, | |
2106 | const char *interface, | |
2107 | char **names) { | |
2108 | ||
8ce2afd6 | 2109 | BUS_DONT_DESTROY(bus); |
46525bfc | 2110 | bool found_interface = false; |
92e189e5 | 2111 | char *prefix; |
992c052c LP |
2112 | int r; |
2113 | ||
dfa92725 | 2114 | assert_return(bus, -EINVAL); |
45b1f410 | 2115 | assert_return(bus = bus_resolve(bus), -ENOPKG); |
dfa92725 LP |
2116 | assert_return(object_path_is_valid(path), -EINVAL); |
2117 | assert_return(interface_name_is_valid(interface), -EINVAL); | |
dfa92725 LP |
2118 | assert_return(!bus_pid_changed(bus), -ECHILD); |
2119 | ||
a3d59cd1 LP |
2120 | if (!BUS_IS_OPEN(bus->state)) |
2121 | return -ENOTCONN; | |
a03e4337 LP |
2122 | |
2123 | /* A non-NULL but empty names list means nothing needs to be | |
2124 | generated. A NULL list OTOH indicates that all properties | |
2125 | that are set to EMITS_CHANGE or EMITS_INVALIDATION shall be | |
2126 | included in the PropertiesChanged message. */ | |
2127 | if (names && names[0] == NULL) | |
dfa92725 | 2128 | return 0; |
992c052c | 2129 | |
68313d3d LP |
2130 | do { |
2131 | bus->nodes_modified = false; | |
992c052c | 2132 | |
46525bfc | 2133 | r = emit_properties_changed_on_interface(bus, path, path, interface, false, &found_interface, names); |
92e189e5 LP |
2134 | if (r != 0) |
2135 | return r; | |
68313d3d LP |
2136 | if (bus->nodes_modified) |
2137 | continue; | |
2138 | ||
2139 | prefix = alloca(strlen(path) + 1); | |
2140 | OBJECT_PATH_FOREACH_PREFIX(prefix, path) { | |
46525bfc | 2141 | r = emit_properties_changed_on_interface(bus, prefix, path, interface, true, &found_interface, names); |
68313d3d LP |
2142 | if (r != 0) |
2143 | return r; | |
2144 | if (bus->nodes_modified) | |
2145 | break; | |
2146 | } | |
2147 | ||
2148 | } while (bus->nodes_modified); | |
992c052c | 2149 | |
46525bfc | 2150 | return found_interface ? 0 : -ENOENT; |
992c052c LP |
2151 | } |
2152 | ||
d9f644e2 | 2153 | _public_ int sd_bus_emit_properties_changed( |
dfa92725 LP |
2154 | sd_bus *bus, |
2155 | const char *path, | |
2156 | const char *interface, | |
2157 | const char *name, ...) { | |
2158 | ||
250a918d | 2159 | char **names; |
992c052c | 2160 | |
dfa92725 | 2161 | assert_return(bus, -EINVAL); |
45b1f410 | 2162 | assert_return(bus = bus_resolve(bus), -ENOPKG); |
dfa92725 LP |
2163 | assert_return(object_path_is_valid(path), -EINVAL); |
2164 | assert_return(interface_name_is_valid(interface), -EINVAL); | |
dfa92725 LP |
2165 | assert_return(!bus_pid_changed(bus), -ECHILD); |
2166 | ||
a3d59cd1 LP |
2167 | if (!BUS_IS_OPEN(bus->state)) |
2168 | return -ENOTCONN; | |
2169 | ||
dfa92725 LP |
2170 | if (!name) |
2171 | return 0; | |
2172 | ||
250a918d | 2173 | names = strv_from_stdarg_alloca(name); |
992c052c LP |
2174 | |
2175 | return sd_bus_emit_properties_changed_strv(bus, path, interface, names); | |
2176 | } | |
2177 | ||
d95eb43e DH |
2178 | static int object_added_append_all_prefix( |
2179 | sd_bus *bus, | |
2180 | sd_bus_message *m, | |
2181 | Set *s, | |
2182 | const char *prefix, | |
2183 | const char *path, | |
2184 | bool require_fallback) { | |
2185 | ||
2186 | const char *previous_interface = NULL; | |
2187 | struct node_vtable *c; | |
2188 | struct node *n; | |
2189 | int r; | |
2190 | ||
2191 | assert(bus); | |
2192 | assert(m); | |
2193 | assert(s); | |
2194 | assert(prefix); | |
2195 | assert(path); | |
2196 | ||
2197 | n = hashmap_get(bus->nodes, prefix); | |
2198 | if (!n) | |
2199 | return 0; | |
2200 | ||
2201 | LIST_FOREACH(vtables, c, n->vtables) { | |
4afd3348 | 2202 | _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL; |
d95eb43e DH |
2203 | void *u = NULL; |
2204 | ||
2205 | if (require_fallback && !c->is_fallback) | |
2206 | continue; | |
2207 | ||
2208 | r = node_vtable_get_userdata(bus, path, c, &u, &error); | |
2209 | if (r < 0) | |
2210 | return r; | |
2211 | if (bus->nodes_modified) | |
2212 | return 0; | |
2213 | if (r == 0) | |
2214 | continue; | |
2215 | ||
2216 | if (!streq_ptr(c->interface, previous_interface)) { | |
2217 | /* If a child-node already handled this interface, we | |
2218 | * skip it on any of its parents. The child vtables | |
2219 | * always fully override any conflicting vtables of | |
2220 | * any parent node. */ | |
2221 | if (set_get(s, c->interface)) | |
2222 | continue; | |
2223 | ||
2224 | r = set_put(s, c->interface); | |
2225 | if (r < 0) | |
2226 | return r; | |
2227 | ||
2228 | if (previous_interface) { | |
2229 | r = sd_bus_message_close_container(m); | |
2230 | if (r < 0) | |
2231 | return r; | |
2232 | r = sd_bus_message_close_container(m); | |
2233 | if (r < 0) | |
2234 | return r; | |
2235 | } | |
2236 | ||
2237 | r = sd_bus_message_open_container(m, 'e', "sa{sv}"); | |
2238 | if (r < 0) | |
2239 | return r; | |
2240 | r = sd_bus_message_append(m, "s", c->interface); | |
2241 | if (r < 0) | |
2242 | return r; | |
2243 | r = sd_bus_message_open_container(m, 'a', "{sv}"); | |
2244 | if (r < 0) | |
2245 | return r; | |
2246 | ||
2247 | previous_interface = c->interface; | |
2248 | } | |
2249 | ||
2250 | r = vtable_append_all_properties(bus, m, path, c, u, &error); | |
2251 | if (r < 0) | |
2252 | return r; | |
2253 | if (bus->nodes_modified) | |
2254 | return 0; | |
2255 | } | |
2256 | ||
2257 | if (previous_interface) { | |
2258 | r = sd_bus_message_close_container(m); | |
2259 | if (r < 0) | |
2260 | return r; | |
2261 | r = sd_bus_message_close_container(m); | |
2262 | if (r < 0) | |
2263 | return r; | |
2264 | } | |
2265 | ||
2266 | return 0; | |
2267 | } | |
2268 | ||
2269 | static int object_added_append_all(sd_bus *bus, sd_bus_message *m, const char *path) { | |
2270 | _cleanup_set_free_ Set *s = NULL; | |
2271 | char *prefix; | |
2272 | int r; | |
2273 | ||
2274 | assert(bus); | |
2275 | assert(m); | |
2276 | assert(path); | |
2277 | ||
2278 | /* | |
2279 | * This appends all interfaces registered on path @path. We first add | |
2280 | * the builtin interfaces, which are always available and handled by | |
2281 | * sd-bus. Then, we add all interfaces registered on the exact node, | |
2282 | * followed by all fallback interfaces registered on any parent prefix. | |
2283 | * | |
2284 | * If an interface is registered multiple times on the same node with | |
2285 | * different vtables, we merge all the properties across all vtables. | |
2286 | * However, if a child node has the same interface registered as one of | |
2287 | * its parent nodes has as fallback, we make the child overwrite the | |
2288 | * parent instead of extending it. Therefore, we keep a "Set" of all | |
2289 | * handled interfaces during parent traversal, so we skip interfaces on | |
2290 | * a parent that were overwritten by a child. | |
2291 | */ | |
2292 | ||
2293 | s = set_new(&string_hash_ops); | |
2294 | if (!s) | |
2295 | return -ENOMEM; | |
2296 | ||
2297 | r = sd_bus_message_append(m, "{sa{sv}}", "org.freedesktop.DBus.Peer", 0); | |
2298 | if (r < 0) | |
2299 | return r; | |
2300 | r = sd_bus_message_append(m, "{sa{sv}}", "org.freedesktop.DBus.Introspectable", 0); | |
2301 | if (r < 0) | |
2302 | return r; | |
2303 | r = sd_bus_message_append(m, "{sa{sv}}", "org.freedesktop.DBus.Properties", 0); | |
2304 | if (r < 0) | |
2305 | return r; | |
2306 | r = sd_bus_message_append(m, "{sa{sv}}", "org.freedesktop.DBus.ObjectManager", 0); | |
2307 | if (r < 0) | |
2308 | return r; | |
2309 | ||
2310 | r = object_added_append_all_prefix(bus, m, s, path, path, false); | |
2311 | if (r < 0) | |
2312 | return r; | |
2313 | if (bus->nodes_modified) | |
2314 | return 0; | |
2315 | ||
2316 | prefix = alloca(strlen(path) + 1); | |
2317 | OBJECT_PATH_FOREACH_PREFIX(prefix, path) { | |
2318 | r = object_added_append_all_prefix(bus, m, s, prefix, path, true); | |
2319 | if (r < 0) | |
2320 | return r; | |
2321 | if (bus->nodes_modified) | |
2322 | return 0; | |
2323 | } | |
2324 | ||
2325 | return 0; | |
2326 | } | |
2327 | ||
969a9685 | 2328 | _public_ int sd_bus_emit_object_added(sd_bus *bus, const char *path) { |
d95eb43e DH |
2329 | BUS_DONT_DESTROY(bus); |
2330 | ||
4afd3348 | 2331 | _cleanup_(sd_bus_message_unrefp) sd_bus_message *m = NULL; |
2d5c8a27 | 2332 | struct node *object_manager; |
d95eb43e DH |
2333 | int r; |
2334 | ||
2335 | /* | |
2336 | * This emits an InterfacesAdded signal on the given path, by iterating | |
2337 | * all registered vtables and fallback vtables on the path. All | |
2338 | * properties are queried and included in the signal. | |
2339 | * This call is equivalent to sd_bus_emit_interfaces_added() with an | |
2340 | * explicit list of registered interfaces. However, unlike | |
2341 | * interfaces_added(), this call can figure out the list of supported | |
2342 | * interfaces itself. Furthermore, it properly adds the builtin | |
2343 | * org.freedesktop.DBus.* interfaces. | |
2344 | */ | |
2345 | ||
2346 | assert_return(bus, -EINVAL); | |
45b1f410 | 2347 | assert_return(bus = bus_resolve(bus), -ENOPKG); |
d95eb43e DH |
2348 | assert_return(object_path_is_valid(path), -EINVAL); |
2349 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
2350 | ||
2351 | if (!BUS_IS_OPEN(bus->state)) | |
2352 | return -ENOTCONN; | |
2353 | ||
2d5c8a27 DH |
2354 | r = bus_find_parent_object_manager(bus, &object_manager, path); |
2355 | if (r < 0) | |
2356 | return r; | |
2357 | if (r == 0) | |
2358 | return -ESRCH; | |
2359 | ||
d95eb43e DH |
2360 | do { |
2361 | bus->nodes_modified = false; | |
2362 | m = sd_bus_message_unref(m); | |
2363 | ||
2d5c8a27 | 2364 | r = sd_bus_message_new_signal(bus, &m, object_manager->path, "org.freedesktop.DBus.ObjectManager", "InterfacesAdded"); |
d95eb43e DH |
2365 | if (r < 0) |
2366 | return r; | |
2367 | ||
2368 | r = sd_bus_message_append_basic(m, 'o', path); | |
2369 | if (r < 0) | |
2370 | return r; | |
2371 | ||
2372 | r = sd_bus_message_open_container(m, 'a', "{sa{sv}}"); | |
2373 | if (r < 0) | |
2374 | return r; | |
2375 | ||
2376 | r = object_added_append_all(bus, m, path); | |
2377 | if (r < 0) | |
2378 | return r; | |
2379 | ||
2380 | if (bus->nodes_modified) | |
2381 | continue; | |
2382 | ||
2383 | r = sd_bus_message_close_container(m); | |
2384 | if (r < 0) | |
2385 | return r; | |
2386 | ||
2387 | } while (bus->nodes_modified); | |
2388 | ||
2389 | return sd_bus_send(bus, m, NULL); | |
2390 | } | |
2391 | ||
2392 | static int object_removed_append_all_prefix( | |
2393 | sd_bus *bus, | |
2394 | sd_bus_message *m, | |
2395 | Set *s, | |
2396 | const char *prefix, | |
2397 | const char *path, | |
2398 | bool require_fallback) { | |
2399 | ||
2400 | const char *previous_interface = NULL; | |
2401 | struct node_vtable *c; | |
2402 | struct node *n; | |
2403 | int r; | |
2404 | ||
2405 | assert(bus); | |
2406 | assert(m); | |
2407 | assert(s); | |
2408 | assert(prefix); | |
2409 | assert(path); | |
2410 | ||
2411 | n = hashmap_get(bus->nodes, prefix); | |
2412 | if (!n) | |
2413 | return 0; | |
2414 | ||
2415 | LIST_FOREACH(vtables, c, n->vtables) { | |
4afd3348 | 2416 | _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL; |
d95eb43e DH |
2417 | void *u = NULL; |
2418 | ||
2419 | if (require_fallback && !c->is_fallback) | |
2420 | continue; | |
2421 | if (streq_ptr(c->interface, previous_interface)) | |
2422 | continue; | |
2423 | ||
2424 | /* If a child-node already handled this interface, we | |
2425 | * skip it on any of its parents. The child vtables | |
2426 | * always fully override any conflicting vtables of | |
2427 | * any parent node. */ | |
2428 | if (set_get(s, c->interface)) | |
2429 | continue; | |
2430 | ||
2431 | r = node_vtable_get_userdata(bus, path, c, &u, &error); | |
2432 | if (r < 0) | |
2433 | return r; | |
2434 | if (bus->nodes_modified) | |
2435 | return 0; | |
2436 | if (r == 0) | |
2437 | continue; | |
2438 | ||
2439 | r = set_put(s, c->interface); | |
2440 | if (r < 0) | |
2441 | return r; | |
2442 | ||
2443 | r = sd_bus_message_append(m, "s", c->interface); | |
2444 | if (r < 0) | |
2445 | return r; | |
2446 | ||
2447 | previous_interface = c->interface; | |
2448 | } | |
2449 | ||
2450 | return 0; | |
2451 | } | |
2452 | ||
2453 | static int object_removed_append_all(sd_bus *bus, sd_bus_message *m, const char *path) { | |
2454 | _cleanup_set_free_ Set *s = NULL; | |
2455 | char *prefix; | |
2456 | int r; | |
2457 | ||
2458 | assert(bus); | |
2459 | assert(m); | |
2460 | assert(path); | |
2461 | ||
2462 | /* see sd_bus_emit_object_added() for details */ | |
2463 | ||
2464 | s = set_new(&string_hash_ops); | |
2465 | if (!s) | |
2466 | return -ENOMEM; | |
2467 | ||
2468 | r = sd_bus_message_append(m, "s", "org.freedesktop.DBus.Peer"); | |
2469 | if (r < 0) | |
2470 | return r; | |
2471 | r = sd_bus_message_append(m, "s", "org.freedesktop.DBus.Introspectable"); | |
2472 | if (r < 0) | |
2473 | return r; | |
2474 | r = sd_bus_message_append(m, "s", "org.freedesktop.DBus.Properties"); | |
2475 | if (r < 0) | |
2476 | return r; | |
2477 | r = sd_bus_message_append(m, "s", "org.freedesktop.DBus.ObjectManager"); | |
2478 | if (r < 0) | |
2479 | return r; | |
2480 | ||
2481 | r = object_removed_append_all_prefix(bus, m, s, path, path, false); | |
2482 | if (r < 0) | |
2483 | return r; | |
2484 | if (bus->nodes_modified) | |
2485 | return 0; | |
2486 | ||
2487 | prefix = alloca(strlen(path) + 1); | |
2488 | OBJECT_PATH_FOREACH_PREFIX(prefix, path) { | |
2489 | r = object_removed_append_all_prefix(bus, m, s, prefix, path, true); | |
2490 | if (r < 0) | |
2491 | return r; | |
2492 | if (bus->nodes_modified) | |
2493 | return 0; | |
2494 | } | |
2495 | ||
2496 | return 0; | |
2497 | } | |
2498 | ||
969a9685 | 2499 | _public_ int sd_bus_emit_object_removed(sd_bus *bus, const char *path) { |
d95eb43e DH |
2500 | BUS_DONT_DESTROY(bus); |
2501 | ||
4afd3348 | 2502 | _cleanup_(sd_bus_message_unrefp) sd_bus_message *m = NULL; |
2d5c8a27 | 2503 | struct node *object_manager; |
d95eb43e DH |
2504 | int r; |
2505 | ||
2506 | /* | |
2507 | * This is like sd_bus_emit_object_added(), but emits an | |
2508 | * InterfacesRemoved signal on the given path. This only includes any | |
2509 | * registered interfaces but skips the properties. Note that this will | |
2510 | * call into the find() callbacks of any registered vtable. Therefore, | |
2511 | * you must call this function before destroying/unlinking your object. | |
2512 | * Otherwise, the list of interfaces will be incomplete. However, note | |
2513 | * that this will *NOT* call into any property callback. Therefore, the | |
2514 | * object might be in an "destructed" state, as long as we can find it. | |
2515 | */ | |
2516 | ||
2517 | assert_return(bus, -EINVAL); | |
45b1f410 | 2518 | assert_return(bus = bus_resolve(bus), -ENOPKG); |
d95eb43e DH |
2519 | assert_return(object_path_is_valid(path), -EINVAL); |
2520 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
2521 | ||
2522 | if (!BUS_IS_OPEN(bus->state)) | |
2523 | return -ENOTCONN; | |
2524 | ||
2d5c8a27 DH |
2525 | r = bus_find_parent_object_manager(bus, &object_manager, path); |
2526 | if (r < 0) | |
2527 | return r; | |
2528 | if (r == 0) | |
2529 | return -ESRCH; | |
2530 | ||
d95eb43e DH |
2531 | do { |
2532 | bus->nodes_modified = false; | |
2533 | m = sd_bus_message_unref(m); | |
2534 | ||
2d5c8a27 | 2535 | r = sd_bus_message_new_signal(bus, &m, object_manager->path, "org.freedesktop.DBus.ObjectManager", "InterfacesRemoved"); |
d95eb43e DH |
2536 | if (r < 0) |
2537 | return r; | |
2538 | ||
2539 | r = sd_bus_message_append_basic(m, 'o', path); | |
2540 | if (r < 0) | |
2541 | return r; | |
2542 | ||
2543 | r = sd_bus_message_open_container(m, 'a', "s"); | |
2544 | if (r < 0) | |
2545 | return r; | |
2546 | ||
2547 | r = object_removed_append_all(bus, m, path); | |
2548 | if (r < 0) | |
2549 | return r; | |
2550 | ||
2551 | if (bus->nodes_modified) | |
2552 | continue; | |
2553 | ||
2554 | r = sd_bus_message_close_container(m); | |
2555 | if (r < 0) | |
2556 | return r; | |
2557 | ||
2558 | } while (bus->nodes_modified); | |
2559 | ||
2560 | return sd_bus_send(bus, m, NULL); | |
2561 | } | |
2562 | ||
4be39163 LP |
2563 | static int interfaces_added_append_one_prefix( |
2564 | sd_bus *bus, | |
2565 | sd_bus_message *m, | |
2566 | const char *prefix, | |
2567 | const char *path, | |
2568 | const char *interface, | |
2569 | bool require_fallback) { | |
2570 | ||
4afd3348 | 2571 | _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL; |
718db961 | 2572 | bool found_interface = false; |
4be39163 LP |
2573 | struct node_vtable *c; |
2574 | struct node *n; | |
2575 | void *u = NULL; | |
2576 | int r; | |
2577 | ||
2578 | assert(bus); | |
2579 | assert(m); | |
2580 | assert(prefix); | |
2581 | assert(path); | |
2582 | assert(interface); | |
2583 | ||
2584 | n = hashmap_get(bus->nodes, prefix); | |
2585 | if (!n) | |
2586 | return 0; | |
2587 | ||
2588 | LIST_FOREACH(vtables, c, n->vtables) { | |
2589 | if (require_fallback && !c->is_fallback) | |
2590 | continue; | |
2591 | ||
718db961 LP |
2592 | if (!streq(c->interface, interface)) |
2593 | continue; | |
4be39163 | 2594 | |
f00c3121 | 2595 | r = node_vtable_get_userdata(bus, path, c, &u, &error); |
718db961 LP |
2596 | if (r < 0) |
2597 | return r; | |
2598 | if (bus->nodes_modified) | |
2599 | return 0; | |
2600 | if (r == 0) | |
2601 | continue; | |
4be39163 | 2602 | |
718db961 LP |
2603 | if (!found_interface) { |
2604 | r = sd_bus_message_append_basic(m, 's', interface); | |
2605 | if (r < 0) | |
2606 | return r; | |
4be39163 | 2607 | |
718db961 LP |
2608 | r = sd_bus_message_open_container(m, 'a', "{sv}"); |
2609 | if (r < 0) | |
2610 | return r; | |
4be39163 | 2611 | |
718db961 LP |
2612 | found_interface = true; |
2613 | } | |
4be39163 | 2614 | |
718db961 LP |
2615 | r = vtable_append_all_properties(bus, m, path, c, u, &error); |
2616 | if (r < 0) | |
2617 | return r; | |
2618 | if (bus->nodes_modified) | |
2619 | return 0; | |
2620 | } | |
4be39163 | 2621 | |
718db961 LP |
2622 | if (found_interface) { |
2623 | r = sd_bus_message_close_container(m); | |
2624 | if (r < 0) | |
2625 | return r; | |
2626 | } | |
4be39163 | 2627 | |
718db961 | 2628 | return found_interface; |
4be39163 LP |
2629 | } |
2630 | ||
2631 | static int interfaces_added_append_one( | |
2632 | sd_bus *bus, | |
2633 | sd_bus_message *m, | |
2634 | const char *path, | |
2635 | const char *interface) { | |
2636 | ||
2637 | char *prefix; | |
2638 | int r; | |
2639 | ||
2640 | assert(bus); | |
2641 | assert(m); | |
2642 | assert(path); | |
2643 | assert(interface); | |
2644 | ||
2645 | r = interfaces_added_append_one_prefix(bus, m, path, path, interface, false); | |
2646 | if (r != 0) | |
2647 | return r; | |
68313d3d LP |
2648 | if (bus->nodes_modified) |
2649 | return 0; | |
4be39163 LP |
2650 | |
2651 | prefix = alloca(strlen(path) + 1); | |
2652 | OBJECT_PATH_FOREACH_PREFIX(prefix, path) { | |
2653 | r = interfaces_added_append_one_prefix(bus, m, prefix, path, interface, true); | |
2654 | if (r != 0) | |
2655 | return r; | |
68313d3d LP |
2656 | if (bus->nodes_modified) |
2657 | return 0; | |
4be39163 LP |
2658 | } |
2659 | ||
2660 | return -ENOENT; | |
992c052c LP |
2661 | } |
2662 | ||
d9f644e2 | 2663 | _public_ int sd_bus_emit_interfaces_added_strv(sd_bus *bus, const char *path, char **interfaces) { |
8ce2afd6 LP |
2664 | BUS_DONT_DESTROY(bus); |
2665 | ||
4afd3348 | 2666 | _cleanup_(sd_bus_message_unrefp) sd_bus_message *m = NULL; |
2d5c8a27 | 2667 | struct node *object_manager; |
4be39163 LP |
2668 | char **i; |
2669 | int r; | |
2670 | ||
2671 | assert_return(bus, -EINVAL); | |
45b1f410 | 2672 | assert_return(bus = bus_resolve(bus), -ENOPKG); |
4be39163 | 2673 | assert_return(object_path_is_valid(path), -EINVAL); |
4be39163 LP |
2674 | assert_return(!bus_pid_changed(bus), -ECHILD); |
2675 | ||
a3d59cd1 LP |
2676 | if (!BUS_IS_OPEN(bus->state)) |
2677 | return -ENOTCONN; | |
2678 | ||
4be39163 LP |
2679 | if (strv_isempty(interfaces)) |
2680 | return 0; | |
2681 | ||
2d5c8a27 DH |
2682 | r = bus_find_parent_object_manager(bus, &object_manager, path); |
2683 | if (r < 0) | |
2684 | return r; | |
2685 | if (r == 0) | |
2686 | return -ESRCH; | |
2687 | ||
68313d3d LP |
2688 | do { |
2689 | bus->nodes_modified = false; | |
1b02f301 | 2690 | m = sd_bus_message_unref(m); |
4be39163 | 2691 | |
2d5c8a27 | 2692 | r = sd_bus_message_new_signal(bus, &m, object_manager->path, "org.freedesktop.DBus.ObjectManager", "InterfacesAdded"); |
68313d3d LP |
2693 | if (r < 0) |
2694 | return r; | |
4be39163 | 2695 | |
68313d3d | 2696 | r = sd_bus_message_append_basic(m, 'o', path); |
4be39163 LP |
2697 | if (r < 0) |
2698 | return r; | |
2699 | ||
68313d3d | 2700 | r = sd_bus_message_open_container(m, 'a', "{sa{sv}}"); |
4be39163 LP |
2701 | if (r < 0) |
2702 | return r; | |
2703 | ||
68313d3d LP |
2704 | STRV_FOREACH(i, interfaces) { |
2705 | assert_return(interface_name_is_valid(*i), -EINVAL); | |
2706 | ||
2707 | r = sd_bus_message_open_container(m, 'e', "sa{sv}"); | |
2708 | if (r < 0) | |
2709 | return r; | |
2710 | ||
2711 | r = interfaces_added_append_one(bus, m, path, *i); | |
2712 | if (r < 0) | |
2713 | return r; | |
2714 | ||
2715 | if (bus->nodes_modified) | |
2716 | break; | |
2717 | ||
2718 | r = sd_bus_message_close_container(m); | |
2719 | if (r < 0) | |
2720 | return r; | |
2721 | } | |
2722 | ||
2723 | if (bus->nodes_modified) | |
2724 | continue; | |
2725 | ||
4be39163 LP |
2726 | r = sd_bus_message_close_container(m); |
2727 | if (r < 0) | |
2728 | return r; | |
4be39163 | 2729 | |
68313d3d | 2730 | } while (bus->nodes_modified); |
4be39163 LP |
2731 | |
2732 | return sd_bus_send(bus, m, NULL); | |
2733 | } | |
2734 | ||
d9f644e2 | 2735 | _public_ int sd_bus_emit_interfaces_added(sd_bus *bus, const char *path, const char *interface, ...) { |
250a918d | 2736 | char **interfaces; |
4be39163 LP |
2737 | |
2738 | assert_return(bus, -EINVAL); | |
45b1f410 | 2739 | assert_return(bus = bus_resolve(bus), -ENOPKG); |
4be39163 | 2740 | assert_return(object_path_is_valid(path), -EINVAL); |
4be39163 LP |
2741 | assert_return(!bus_pid_changed(bus), -ECHILD); |
2742 | ||
a3d59cd1 LP |
2743 | if (!BUS_IS_OPEN(bus->state)) |
2744 | return -ENOTCONN; | |
2745 | ||
250a918d | 2746 | interfaces = strv_from_stdarg_alloca(interface); |
4be39163 LP |
2747 | |
2748 | return sd_bus_emit_interfaces_added_strv(bus, path, interfaces); | |
2749 | } | |
2750 | ||
d9f644e2 | 2751 | _public_ int sd_bus_emit_interfaces_removed_strv(sd_bus *bus, const char *path, char **interfaces) { |
4afd3348 | 2752 | _cleanup_(sd_bus_message_unrefp) sd_bus_message *m = NULL; |
2d5c8a27 | 2753 | struct node *object_manager; |
4be39163 LP |
2754 | int r; |
2755 | ||
2756 | assert_return(bus, -EINVAL); | |
45b1f410 | 2757 | assert_return(bus = bus_resolve(bus), -ENOPKG); |
4be39163 | 2758 | assert_return(object_path_is_valid(path), -EINVAL); |
4be39163 LP |
2759 | assert_return(!bus_pid_changed(bus), -ECHILD); |
2760 | ||
a3d59cd1 LP |
2761 | if (!BUS_IS_OPEN(bus->state)) |
2762 | return -ENOTCONN; | |
2763 | ||
4be39163 LP |
2764 | if (strv_isempty(interfaces)) |
2765 | return 0; | |
2766 | ||
2d5c8a27 DH |
2767 | r = bus_find_parent_object_manager(bus, &object_manager, path); |
2768 | if (r < 0) | |
2769 | return r; | |
2770 | if (r == 0) | |
2771 | return -ESRCH; | |
2772 | ||
2773 | r = sd_bus_message_new_signal(bus, &m, object_manager->path, "org.freedesktop.DBus.ObjectManager", "InterfacesRemoved"); | |
4be39163 LP |
2774 | if (r < 0) |
2775 | return r; | |
2776 | ||
2777 | r = sd_bus_message_append_basic(m, 'o', path); | |
2778 | if (r < 0) | |
2779 | return r; | |
2780 | ||
2781 | r = sd_bus_message_append_strv(m, interfaces); | |
2782 | if (r < 0) | |
2783 | return r; | |
2784 | ||
2785 | return sd_bus_send(bus, m, NULL); | |
2786 | } | |
2787 | ||
d9f644e2 | 2788 | _public_ int sd_bus_emit_interfaces_removed(sd_bus *bus, const char *path, const char *interface, ...) { |
250a918d | 2789 | char **interfaces; |
4be39163 LP |
2790 | |
2791 | assert_return(bus, -EINVAL); | |
45b1f410 | 2792 | assert_return(bus = bus_resolve(bus), -ENOPKG); |
4be39163 | 2793 | assert_return(object_path_is_valid(path), -EINVAL); |
4be39163 LP |
2794 | assert_return(!bus_pid_changed(bus), -ECHILD); |
2795 | ||
a3d59cd1 LP |
2796 | if (!BUS_IS_OPEN(bus->state)) |
2797 | return -ENOTCONN; | |
2798 | ||
250a918d | 2799 | interfaces = strv_from_stdarg_alloca(interface); |
4be39163 LP |
2800 | |
2801 | return sd_bus_emit_interfaces_removed_strv(bus, path, interfaces); | |
992c052c LP |
2802 | } |
2803 | ||
19befb2d LP |
2804 | _public_ int sd_bus_add_object_manager(sd_bus *bus, sd_bus_slot **slot, const char *path) { |
2805 | sd_bus_slot *s; | |
992c052c | 2806 | struct node *n; |
19befb2d | 2807 | int r; |
992c052c | 2808 | |
dfa92725 | 2809 | assert_return(bus, -EINVAL); |
45b1f410 | 2810 | assert_return(bus = bus_resolve(bus), -ENOPKG); |
dfa92725 LP |
2811 | assert_return(object_path_is_valid(path), -EINVAL); |
2812 | assert_return(!bus_pid_changed(bus), -ECHILD); | |
992c052c LP |
2813 | |
2814 | n = bus_node_allocate(bus, path); | |
2815 | if (!n) | |
2816 | return -ENOMEM; | |
2817 | ||
19befb2d LP |
2818 | s = bus_slot_allocate(bus, !slot, BUS_NODE_OBJECT_MANAGER, sizeof(struct node_object_manager), NULL); |
2819 | if (!s) { | |
2820 | r = -ENOMEM; | |
2821 | goto fail; | |
2822 | } | |
992c052c | 2823 | |
19befb2d LP |
2824 | s->node_object_manager.node = n; |
2825 | LIST_PREPEND(object_managers, n->object_managers, &s->node_object_manager); | |
2826 | bus->nodes_modified = true; | |
992c052c | 2827 | |
19befb2d LP |
2828 | if (slot) |
2829 | *slot = s; | |
992c052c | 2830 | |
19befb2d | 2831 | return 0; |
992c052c | 2832 | |
19befb2d LP |
2833 | fail: |
2834 | sd_bus_slot_unref(s); | |
992c052c | 2835 | bus_node_gc(bus, n); |
dfa92725 | 2836 | |
19befb2d | 2837 | return r; |
992c052c | 2838 | } |