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6629161f LP |
1 | /*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/ |
2 | ||
3 | /*** | |
4 | This file is part of systemd. | |
5 | ||
6 | Copyright 2013 Lennart Poettering | |
7 | ||
8 | systemd is free software; you can redistribute it and/or modify it | |
9 | under the terms of the GNU Lesser General Public License as published by | |
10 | the Free Software Foundation; either version 2.1 of the License, or | |
11 | (at your option) any later version. | |
12 | ||
13 | systemd is distributed in the hope that it will be useful, but | |
14 | WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
16 | Lesser General Public License for more details. | |
17 | ||
18 | You should have received a copy of the GNU Lesser General Public License | |
19 | along with systemd; If not, see <http://www.gnu.org/licenses/>. | |
20 | ***/ | |
21 | ||
7211f918 LP |
22 | #ifdef HAVE_VALGRIND_MEMCHECK_H |
23 | #include <valgrind/memcheck.h> | |
24 | #endif | |
25 | ||
6629161f | 26 | #include <fcntl.h> |
c556fe79 | 27 | #include <malloc.h> |
fd8d62d9 | 28 | #include <sys/mman.h> |
6629161f LP |
29 | |
30 | #include "util.h" | |
31 | ||
32 | #include "bus-internal.h" | |
33 | #include "bus-message.h" | |
34 | #include "bus-kernel.h" | |
a56f19c4 | 35 | #include "bus-bloom.h" |
777d7a61 LP |
36 | #include "bus-util.h" |
37 | ||
38 | #define UNIQUE_NAME_MAX (3+DECIMAL_STR_MAX(uint64_t)) | |
6629161f | 39 | |
c7819669 | 40 | int bus_kernel_parse_unique_name(const char *s, uint64_t *id) { |
6629161f LP |
41 | int r; |
42 | ||
43 | assert(s); | |
44 | assert(id); | |
45 | ||
46 | if (!startswith(s, ":1.")) | |
47 | return 0; | |
48 | ||
49 | r = safe_atou64(s + 3, id); | |
50 | if (r < 0) | |
51 | return r; | |
52 | ||
53 | return 1; | |
54 | } | |
55 | ||
febfd508 | 56 | static void append_payload_vec(struct kdbus_item **d, const void *p, size_t sz) { |
6629161f | 57 | assert(d); |
6629161f LP |
58 | assert(sz > 0); |
59 | ||
e86b80b8 LP |
60 | *d = ALIGN8_PTR(*d); |
61 | ||
66b26c5c LP |
62 | /* Note that p can be NULL, which encodes a region full of |
63 | * zeroes, which is useful to optimize certain padding | |
64 | * conditions */ | |
65 | ||
febfd508 | 66 | (*d)->size = offsetof(struct kdbus_item, vec) + sizeof(struct kdbus_vec); |
ea1edece | 67 | (*d)->type = KDBUS_ITEM_PAYLOAD_VEC; |
a392d361 | 68 | (*d)->vec.address = PTR_TO_UINT64(p); |
6629161f LP |
69 | (*d)->vec.size = sz; |
70 | ||
febfd508 | 71 | *d = (struct kdbus_item *) ((uint8_t*) *d + (*d)->size); |
6629161f LP |
72 | } |
73 | ||
a392d361 LP |
74 | static void append_payload_memfd(struct kdbus_item **d, int memfd, size_t sz) { |
75 | assert(d); | |
76 | assert(memfd >= 0); | |
77 | assert(sz > 0); | |
78 | ||
79 | *d = ALIGN8_PTR(*d); | |
80 | (*d)->size = offsetof(struct kdbus_item, memfd) + sizeof(struct kdbus_memfd); | |
ea1edece | 81 | (*d)->type = KDBUS_ITEM_PAYLOAD_MEMFD; |
a392d361 LP |
82 | (*d)->memfd.fd = memfd; |
83 | (*d)->memfd.size = sz; | |
84 | ||
85 | *d = (struct kdbus_item *) ((uint8_t*) *d + (*d)->size); | |
86 | } | |
87 | ||
febfd508 | 88 | static void append_destination(struct kdbus_item **d, const char *s, size_t length) { |
6629161f | 89 | assert(d); |
b5baa8fe | 90 | assert(s); |
6629161f | 91 | |
e86b80b8 LP |
92 | *d = ALIGN8_PTR(*d); |
93 | ||
febfd508 | 94 | (*d)->size = offsetof(struct kdbus_item, str) + length + 1; |
ea1edece | 95 | (*d)->type = KDBUS_ITEM_DST_NAME; |
51038c03 | 96 | memcpy((*d)->str, s, length + 1); |
6629161f | 97 | |
febfd508 | 98 | *d = (struct kdbus_item *) ((uint8_t*) *d + (*d)->size); |
6629161f LP |
99 | } |
100 | ||
febfd508 | 101 | static void* append_bloom(struct kdbus_item **d, size_t length) { |
a56f19c4 LP |
102 | void *r; |
103 | ||
b5baa8fe | 104 | assert(d); |
b5baa8fe LP |
105 | |
106 | *d = ALIGN8_PTR(*d); | |
107 | ||
febfd508 | 108 | (*d)->size = offsetof(struct kdbus_item, data) + length; |
ea1edece | 109 | (*d)->type = KDBUS_ITEM_BLOOM; |
a56f19c4 | 110 | r = (*d)->data; |
b5baa8fe | 111 | |
febfd508 | 112 | *d = (struct kdbus_item *) ((uint8_t*) *d + (*d)->size); |
a56f19c4 LP |
113 | |
114 | return r; | |
115 | } | |
116 | ||
febfd508 | 117 | static void append_fds(struct kdbus_item **d, const int fds[], unsigned n_fds) { |
9097fe29 LP |
118 | assert(d); |
119 | assert(fds); | |
120 | assert(n_fds > 0); | |
121 | ||
122 | *d = ALIGN8_PTR(*d); | |
febfd508 | 123 | (*d)->size = offsetof(struct kdbus_item, fds) + sizeof(int) * n_fds; |
ea1edece | 124 | (*d)->type = KDBUS_ITEM_FDS; |
9097fe29 LP |
125 | memcpy((*d)->fds, fds, sizeof(int) * n_fds); |
126 | ||
febfd508 | 127 | *d = (struct kdbus_item *) ((uint8_t*) *d + (*d)->size); |
9097fe29 LP |
128 | } |
129 | ||
a56f19c4 LP |
130 | static int bus_message_setup_bloom(sd_bus_message *m, void *bloom) { |
131 | unsigned i; | |
132 | int r; | |
133 | ||
134 | assert(m); | |
135 | assert(bloom); | |
136 | ||
137 | memset(bloom, 0, BLOOM_SIZE); | |
138 | ||
139 | bloom_add_pair(bloom, "message-type", bus_message_type_to_string(m->header->type)); | |
140 | ||
141 | if (m->interface) | |
142 | bloom_add_pair(bloom, "interface", m->interface); | |
143 | if (m->member) | |
144 | bloom_add_pair(bloom, "member", m->member); | |
145 | if (m->path) { | |
146 | bloom_add_pair(bloom, "path", m->path); | |
f11e11e3 | 147 | bloom_add_pair(bloom, "path-slash-prefix", m->path); |
a56f19c4 LP |
148 | bloom_add_prefixes(bloom, "path-slash-prefix", m->path, '/'); |
149 | } | |
150 | ||
151 | r = sd_bus_message_rewind(m, true); | |
152 | if (r < 0) | |
153 | return r; | |
154 | ||
155 | for (i = 0; i < 64; i++) { | |
156 | char type; | |
157 | const char *t; | |
158 | char buf[sizeof("arg")-1 + 2 + sizeof("-slash-prefix")]; | |
159 | char *e; | |
160 | ||
161 | r = sd_bus_message_peek_type(m, &type, NULL); | |
162 | if (r < 0) | |
163 | return r; | |
164 | ||
165 | if (type != SD_BUS_TYPE_STRING && | |
166 | type != SD_BUS_TYPE_OBJECT_PATH && | |
167 | type != SD_BUS_TYPE_SIGNATURE) | |
168 | break; | |
169 | ||
170 | r = sd_bus_message_read_basic(m, type, &t); | |
171 | if (r < 0) | |
172 | return r; | |
173 | ||
174 | e = stpcpy(buf, "arg"); | |
175 | if (i < 10) | |
176 | *(e++) = '0' + i; | |
177 | else { | |
178 | *(e++) = '0' + (i / 10); | |
179 | *(e++) = '0' + (i % 10); | |
180 | } | |
181 | ||
182 | *e = 0; | |
183 | bloom_add_pair(bloom, buf, t); | |
184 | ||
185 | strcpy(e, "-dot-prefix"); | |
186 | bloom_add_prefixes(bloom, buf, t, '.'); | |
187 | strcpy(e, "-slash-prefix"); | |
188 | bloom_add_prefixes(bloom, buf, t, '/'); | |
189 | } | |
190 | ||
191 | return 0; | |
b5baa8fe LP |
192 | } |
193 | ||
5b7d4c1c | 194 | static int bus_message_setup_kmsg(sd_bus *b, sd_bus_message *m) { |
9b29bb68 | 195 | struct bus_body_part *part; |
febfd508 | 196 | struct kdbus_item *d; |
6629161f LP |
197 | bool well_known; |
198 | uint64_t unique; | |
199 | size_t sz, dl; | |
9b29bb68 | 200 | unsigned i; |
6629161f LP |
201 | int r; |
202 | ||
5b7d4c1c | 203 | assert(b); |
6629161f LP |
204 | assert(m); |
205 | assert(m->sealed); | |
e9a967f9 LP |
206 | |
207 | if (m->kdbus) | |
208 | return 0; | |
6629161f LP |
209 | |
210 | if (m->destination) { | |
c7819669 | 211 | r = bus_kernel_parse_unique_name(m->destination, &unique); |
6629161f LP |
212 | if (r < 0) |
213 | return r; | |
214 | ||
215 | well_known = r == 0; | |
216 | } else | |
217 | well_known = false; | |
218 | ||
b1454bf0 | 219 | sz = offsetof(struct kdbus_msg, items); |
6629161f | 220 | |
a392d361 LP |
221 | assert_cc(ALIGN8(offsetof(struct kdbus_item, vec) + sizeof(struct kdbus_vec)) == |
222 | ALIGN8(offsetof(struct kdbus_item, memfd) + sizeof(struct kdbus_memfd))); | |
223 | ||
69aec65c | 224 | /* Add in fixed header, fields header and payload */ |
c91cb83c | 225 | sz += (1 + m->n_body_parts) * |
bc7fd8cd | 226 | ALIGN8(offsetof(struct kdbus_item, vec) + sizeof(struct kdbus_vec)); |
6629161f | 227 | |
69aec65c | 228 | /* Add space for bloom filter */ |
febfd508 | 229 | sz += ALIGN8(offsetof(struct kdbus_item, data) + BLOOM_SIZE); |
b5baa8fe | 230 | |
6629161f LP |
231 | /* Add in well-known destination header */ |
232 | if (well_known) { | |
233 | dl = strlen(m->destination); | |
febfd508 | 234 | sz += ALIGN8(offsetof(struct kdbus_item, str) + dl + 1); |
6629161f LP |
235 | } |
236 | ||
9097fe29 LP |
237 | /* Add space for unix fds */ |
238 | if (m->n_fds > 0) | |
febfd508 | 239 | sz += ALIGN8(offsetof(struct kdbus_item, fds) + sizeof(int)*m->n_fds); |
9097fe29 | 240 | |
c556fe79 | 241 | m->kdbus = memalign(8, sz); |
66b26c5c LP |
242 | if (!m->kdbus) { |
243 | r = -ENOMEM; | |
244 | goto fail; | |
245 | } | |
6629161f | 246 | |
66b26c5c | 247 | m->free_kdbus = true; |
d9115e18 LP |
248 | memset(m->kdbus, 0, sz); |
249 | ||
6629161f LP |
250 | m->kdbus->flags = |
251 | ((m->header->flags & SD_BUS_MESSAGE_NO_REPLY_EXPECTED) ? 0 : KDBUS_MSG_FLAGS_EXPECT_REPLY) | | |
252 | ((m->header->flags & SD_BUS_MESSAGE_NO_AUTO_START) ? KDBUS_MSG_FLAGS_NO_AUTO_START : 0); | |
253 | m->kdbus->dst_id = | |
254 | well_known ? 0 : | |
b5baa8fe | 255 | m->destination ? unique : KDBUS_DST_ID_BROADCAST; |
6629161f LP |
256 | m->kdbus->payload_type = KDBUS_PAYLOAD_DBUS1; |
257 | m->kdbus->cookie = m->header->serial; | |
258 | ||
259 | m->kdbus->timeout_ns = m->timeout * NSEC_PER_USEC; | |
260 | ||
b1454bf0 | 261 | d = m->kdbus->items; |
6629161f LP |
262 | |
263 | if (well_known) | |
264 | append_destination(&d, m->destination, dl); | |
265 | ||
c91cb83c | 266 | append_payload_vec(&d, m->header, BUS_MESSAGE_BODY_BEGIN(m)); |
a392d361 LP |
267 | |
268 | MESSAGE_FOREACH_PART(part, i, m) { | |
269 | if (part->is_zero) { | |
66b26c5c LP |
270 | /* If this is padding then simply send a |
271 | * vector with a NULL data pointer which the | |
272 | * kernel will just pass through. This is the | |
273 | * most efficient way to encode zeroes */ | |
274 | ||
a392d361 LP |
275 | append_payload_vec(&d, NULL, part->size); |
276 | continue; | |
277 | } | |
278 | ||
66b26c5c LP |
279 | if (part->memfd >= 0 && part->sealed && m->destination) { |
280 | /* Try to send a memfd, if the part is | |
281 | * sealed and this is not a broadcast. Since we can only */ | |
a392d361 | 282 | |
66b26c5c LP |
283 | append_payload_memfd(&d, part->memfd, part->size); |
284 | continue; | |
a392d361 LP |
285 | } |
286 | ||
66b26c5c LP |
287 | /* Otherwise let's send a vector to the actual data, |
288 | * for that we need to map it first. */ | |
289 | r = bus_body_part_map(part); | |
290 | if (r < 0) | |
291 | goto fail; | |
a392d361 | 292 | |
bc7fd8cd | 293 | append_payload_vec(&d, part->data, part->size); |
a392d361 | 294 | } |
6629161f | 295 | |
5b7d4c1c LP |
296 | if (m->kdbus->dst_id == KDBUS_DST_ID_BROADCAST) { |
297 | void *p; | |
298 | ||
a56f19c4 LP |
299 | p = append_bloom(&d, BLOOM_SIZE); |
300 | r = bus_message_setup_bloom(m, p); | |
a392d361 LP |
301 | if (r < 0) |
302 | goto fail; | |
5b7d4c1c | 303 | } |
b5baa8fe | 304 | |
9097fe29 LP |
305 | if (m->n_fds > 0) |
306 | append_fds(&d, m->fds, m->n_fds); | |
307 | ||
e9a967f9 | 308 | m->kdbus->size = (uint8_t*) d - (uint8_t*) m->kdbus; |
6629161f LP |
309 | assert(m->kdbus->size <= sz); |
310 | ||
311 | return 0; | |
a392d361 LP |
312 | |
313 | fail: | |
66b26c5c | 314 | m->poisoned = true; |
a392d361 | 315 | return r; |
6629161f LP |
316 | } |
317 | ||
318 | int bus_kernel_take_fd(sd_bus *b) { | |
62b3e928 | 319 | struct kdbus_cmd_hello hello; |
6629161f LP |
320 | int r; |
321 | ||
322 | assert(b); | |
323 | ||
f08838da LP |
324 | if (b->is_server) |
325 | return -EINVAL; | |
326 | ||
8f155917 LP |
327 | b->use_memfd = 1; |
328 | ||
62b3e928 KS |
329 | zero(hello); |
330 | hello.size = sizeof(hello); | |
331 | hello.conn_flags = b->hello_flags; | |
d21a7bb1 | 332 | hello.attach_flags = b->attach_flags; |
62b3e928 KS |
333 | hello.pool_size = KDBUS_POOL_SIZE; |
334 | ||
335 | r = ioctl(b->input_fd, KDBUS_CMD_HELLO, &hello); | |
336 | if (r < 0) | |
337 | return -errno; | |
338 | ||
fd8d62d9 | 339 | if (!b->kdbus_buffer) { |
62b3e928 | 340 | b->kdbus_buffer = mmap(NULL, KDBUS_POOL_SIZE, PROT_READ, MAP_SHARED, b->input_fd, 0); |
fd8d62d9 LP |
341 | if (b->kdbus_buffer == MAP_FAILED) { |
342 | b->kdbus_buffer = NULL; | |
343 | return -errno; | |
344 | } | |
345 | } | |
346 | ||
5b7d4c1c LP |
347 | /* The higher 32bit of both flags fields are considered |
348 | * 'incompatible flags'. Refuse them all for now. */ | |
62b3e928 KS |
349 | if (hello.bus_flags > 0xFFFFFFFFULL || |
350 | hello.conn_flags > 0xFFFFFFFFULL) | |
5b7d4c1c LP |
351 | return -ENOTSUP; |
352 | ||
62b3e928 | 353 | if (hello.bloom_size != BLOOM_SIZE) |
a56f19c4 LP |
354 | return -ENOTSUP; |
355 | ||
62b3e928 | 356 | if (asprintf(&b->unique_name, ":1.%llu", (unsigned long long) hello.id) < 0) |
de297575 LP |
357 | return -ENOMEM; |
358 | ||
6629161f | 359 | b->is_kernel = true; |
f08838da | 360 | b->bus_client = true; |
62b3e928 | 361 | b->can_fds = !!(hello.conn_flags & KDBUS_HELLO_ACCEPT_FD); |
6629161f | 362 | |
c58dea19 DM |
363 | /* the kernel told us the UUID of the underlying bus */ |
364 | memcpy(b->server_id.bytes, hello.id128, sizeof(b->server_id.bytes)); | |
365 | ||
6629161f LP |
366 | r = bus_start_running(b); |
367 | if (r < 0) | |
368 | return r; | |
369 | ||
370 | return 1; | |
371 | } | |
372 | ||
373 | int bus_kernel_connect(sd_bus *b) { | |
374 | assert(b); | |
375 | assert(b->input_fd < 0); | |
376 | assert(b->output_fd < 0); | |
377 | assert(b->kernel); | |
378 | ||
f08838da LP |
379 | if (b->is_server) |
380 | return -EINVAL; | |
381 | ||
6629161f | 382 | b->input_fd = open(b->kernel, O_RDWR|O_NOCTTY|O_CLOEXEC); |
c320885c | 383 | if (b->input_fd < 0) |
6629161f LP |
384 | return -errno; |
385 | ||
386 | b->output_fd = b->input_fd; | |
387 | ||
388 | return bus_kernel_take_fd(b); | |
389 | } | |
390 | ||
391 | int bus_kernel_write_message(sd_bus *bus, sd_bus_message *m) { | |
392 | int r; | |
393 | ||
394 | assert(bus); | |
395 | assert(m); | |
396 | assert(bus->state == BUS_RUNNING); | |
397 | ||
5b7d4c1c | 398 | r = bus_message_setup_kmsg(bus, m); |
6629161f LP |
399 | if (r < 0) |
400 | return r; | |
401 | ||
402 | r = ioctl(bus->output_fd, KDBUS_CMD_MSG_SEND, m->kdbus); | |
403 | if (r < 0) | |
404 | return errno == EAGAIN ? 0 : -errno; | |
405 | ||
51038c03 | 406 | return 1; |
6629161f LP |
407 | } |
408 | ||
fd8d62d9 | 409 | static void close_kdbus_msg(sd_bus *bus, struct kdbus_msg *k) { |
62b3e928 | 410 | uint64_t off; |
febfd508 | 411 | struct kdbus_item *d; |
6629161f | 412 | |
fd8d62d9 LP |
413 | assert(bus); |
414 | assert(k); | |
415 | ||
62b3e928 KS |
416 | off = (uint8_t *)k - (uint8_t *)bus->kdbus_buffer; |
417 | ioctl(bus->input_fd, KDBUS_CMD_MSG_RELEASE, &off); | |
fd8d62d9 | 418 | |
9eb34e82 | 419 | KDBUS_PART_FOREACH(d, k, items) { |
6629161f | 420 | |
ea1edece | 421 | if (d->type == KDBUS_ITEM_FDS) |
1307c3ff | 422 | close_many(d->fds, (d->size - offsetof(struct kdbus_item, fds)) / sizeof(int)); |
ea1edece | 423 | else if (d->type == KDBUS_ITEM_PAYLOAD_MEMFD) |
1307c3ff | 424 | close_nointr_nofail(d->memfd.fd); |
6629161f LP |
425 | } |
426 | } | |
427 | ||
777d7a61 LP |
428 | static int return_name_owner_changed(sd_bus *bus, const char *name, const char *old_owner, const char *new_owner, sd_bus_message **ret) { |
429 | _cleanup_bus_message_unref_ sd_bus_message *m = NULL; | |
430 | int r; | |
431 | ||
432 | assert(bus); | |
433 | assert(ret); | |
434 | ||
435 | r = sd_bus_message_new_signal( | |
436 | bus, | |
437 | "/org/freedesktop/DBus", | |
438 | "org.freedesktop.DBus", | |
439 | "NameOwnerChanged", | |
440 | &m); | |
441 | if (r < 0) | |
442 | return r; | |
443 | ||
444 | r = sd_bus_message_append(m, "sss", name, old_owner, new_owner); | |
445 | if (r < 0) | |
446 | return r; | |
447 | ||
448 | m->sender = "org.freedesktop.DBus"; | |
449 | ||
450 | r = bus_seal_message(bus, m); | |
451 | if (r < 0) | |
452 | return r; | |
453 | ||
454 | *ret = m; | |
455 | m = NULL; | |
456 | ||
457 | return 1; | |
458 | } | |
459 | ||
460 | static int translate_name_change(sd_bus *bus, struct kdbus_msg *k, struct kdbus_item *d, sd_bus_message **ret) { | |
461 | char new_owner[UNIQUE_NAME_MAX], old_owner[UNIQUE_NAME_MAX]; | |
462 | ||
463 | assert(bus); | |
464 | assert(k); | |
465 | assert(d); | |
466 | assert(ret); | |
467 | ||
468 | if (d->name_change.flags != 0) | |
469 | return 0; | |
470 | ||
471 | if (d->type == KDBUS_ITEM_NAME_ADD) | |
472 | old_owner[0] = 0; | |
473 | else | |
474 | sprintf(old_owner, ":1.%llu", (unsigned long long) d->name_change.old_id); | |
475 | ||
476 | if (d->type == KDBUS_ITEM_NAME_REMOVE) | |
477 | new_owner[0] = 0; | |
478 | else | |
479 | sprintf(new_owner, ":1.%llu", (unsigned long long) d->name_change.new_id); | |
480 | ||
481 | return return_name_owner_changed(bus, d->name_change.name, old_owner, new_owner, ret); | |
482 | } | |
483 | ||
484 | static int translate_id_change(sd_bus *bus, struct kdbus_msg *k, struct kdbus_item *d, sd_bus_message **ret) { | |
485 | char owner[UNIQUE_NAME_MAX]; | |
486 | ||
487 | assert(bus); | |
488 | assert(k); | |
489 | assert(d); | |
490 | assert(ret); | |
491 | ||
492 | sprintf(owner, ":1.%llu", d->id_change.id); | |
493 | ||
494 | return return_name_owner_changed( | |
495 | bus, owner, | |
496 | d->type == KDBUS_ITEM_ID_ADD ? NULL : owner, | |
497 | d->type == KDBUS_ITEM_ID_ADD ? owner : NULL, | |
498 | ret); | |
499 | } | |
500 | ||
501 | static int translate_reply(sd_bus *bus, struct kdbus_msg *k, struct kdbus_item *d, sd_bus_message **ret) { | |
502 | _cleanup_bus_message_unref_ sd_bus_message *m = NULL; | |
503 | int r; | |
504 | ||
505 | assert(bus); | |
506 | assert(k); | |
507 | assert(d); | |
508 | assert(ret); | |
509 | ||
510 | r = bus_message_new_synthetic_error( | |
511 | bus, | |
512 | k->cookie_reply, | |
513 | d->type == KDBUS_ITEM_REPLY_TIMEOUT ? | |
514 | &SD_BUS_ERROR_MAKE_CONST(SD_BUS_ERROR_NO_REPLY, "Method call timed out") : | |
515 | &SD_BUS_ERROR_MAKE_CONST(SD_BUS_ERROR_NO_REPLY, "Method call peer died"), | |
516 | &m); | |
517 | if (r < 0) | |
518 | return r; | |
519 | ||
520 | m->sender = "org.freedesktop.DBus"; | |
521 | ||
522 | r = bus_seal_message(bus, m); | |
523 | if (r < 0) | |
524 | return r; | |
525 | ||
526 | *ret = m; | |
527 | m = NULL; | |
528 | ||
529 | return 1; | |
530 | } | |
531 | ||
532 | static int bus_kernel_translate_message(sd_bus *bus, struct kdbus_msg *k, sd_bus_message **ret) { | |
533 | struct kdbus_item *d, *found = NULL; | |
534 | ||
535 | static int (* const translate[])(sd_bus *bus, struct kdbus_msg *k, struct kdbus_item *d, sd_bus_message **ret) = { | |
536 | [KDBUS_ITEM_NAME_ADD - _KDBUS_ITEM_KERNEL_BASE] = translate_name_change, | |
537 | [KDBUS_ITEM_NAME_REMOVE - _KDBUS_ITEM_KERNEL_BASE] = translate_name_change, | |
538 | [KDBUS_ITEM_NAME_CHANGE - _KDBUS_ITEM_KERNEL_BASE] = translate_name_change, | |
539 | ||
540 | [KDBUS_ITEM_ID_ADD - _KDBUS_ITEM_KERNEL_BASE] = translate_id_change, | |
541 | [KDBUS_ITEM_ID_REMOVE - _KDBUS_ITEM_KERNEL_BASE] = translate_id_change, | |
542 | ||
543 | [KDBUS_ITEM_REPLY_TIMEOUT - _KDBUS_ITEM_KERNEL_BASE] = translate_reply, | |
544 | [KDBUS_ITEM_REPLY_DEAD - _KDBUS_ITEM_KERNEL_BASE] = translate_reply, | |
545 | }; | |
546 | ||
547 | assert(bus); | |
548 | assert(k); | |
549 | assert(ret); | |
550 | assert(k->payload_type == KDBUS_PAYLOAD_KERNEL); | |
551 | ||
552 | KDBUS_PART_FOREACH(d, k, items) { | |
553 | if (d->type >= _KDBUS_ITEM_KERNEL_BASE && d->type < _KDBUS_ITEM_KERNEL_BASE + ELEMENTSOF(translate)) { | |
554 | if (found) | |
555 | return -EBADMSG; | |
556 | found = d; | |
557 | } else | |
558 | log_debug("Got unknown field from kernel %llu", d->type); | |
559 | } | |
560 | ||
561 | if (!found) { | |
562 | log_debug("Didn't find a kernel message to translate."); | |
563 | return 0; | |
564 | } | |
565 | ||
566 | return translate[found->type](bus, k, d, ret); | |
567 | } | |
568 | ||
87b522ae DM |
569 | int kdbus_translate_attach_flags(uint64_t mask, uint64_t *kdbus_mask) { |
570 | ||
571 | uint64_t m = 0; | |
572 | ||
573 | SET_FLAG(m, KDBUS_ATTACH_CREDS, | |
574 | !!(mask & (SD_BUS_CREDS_UID|SD_BUS_CREDS_GID|SD_BUS_CREDS_PID|SD_BUS_CREDS_PID_STARTTIME|SD_BUS_CREDS_TID))); | |
575 | ||
576 | SET_FLAG(m, KDBUS_ATTACH_COMM, | |
577 | !!(mask & (SD_BUS_CREDS_COMM|SD_BUS_CREDS_TID_COMM))); | |
578 | ||
579 | SET_FLAG(m, KDBUS_ATTACH_EXE, | |
580 | !!(mask & SD_BUS_CREDS_EXE)); | |
581 | ||
582 | SET_FLAG(m, KDBUS_ATTACH_CMDLINE, | |
583 | !!(mask & SD_BUS_CREDS_CMDLINE)); | |
584 | ||
585 | SET_FLAG(m, KDBUS_ATTACH_CGROUP, | |
586 | !!(mask & (SD_BUS_CREDS_CGROUP|SD_BUS_CREDS_UNIT|SD_BUS_CREDS_USER_UNIT|SD_BUS_CREDS_SLICE|SD_BUS_CREDS_SESSION|SD_BUS_CREDS_OWNER_UID))); | |
587 | ||
588 | SET_FLAG(m, KDBUS_ATTACH_CAPS, | |
589 | !!(mask & (SD_BUS_CREDS_EFFECTIVE_CAPS|SD_BUS_CREDS_PERMITTED_CAPS|SD_BUS_CREDS_INHERITABLE_CAPS|SD_BUS_CREDS_BOUNDING_CAPS))); | |
590 | ||
591 | SET_FLAG(m, KDBUS_ATTACH_SECLABEL, | |
592 | !!(mask & SD_BUS_CREDS_SELINUX_CONTEXT)); | |
593 | ||
594 | SET_FLAG(m, KDBUS_ATTACH_AUDIT, | |
595 | !!(mask & (SD_BUS_CREDS_AUDIT_SESSION_ID|SD_BUS_CREDS_AUDIT_LOGIN_UID))); | |
596 | ||
597 | *kdbus_mask = m; | |
598 | ||
599 | return 0; | |
600 | } | |
601 | ||
6629161f LP |
602 | static int bus_kernel_make_message(sd_bus *bus, struct kdbus_msg *k, sd_bus_message **ret) { |
603 | sd_bus_message *m = NULL; | |
febfd508 | 604 | struct kdbus_item *d; |
1307c3ff | 605 | unsigned n_fds = 0; |
6629161f LP |
606 | _cleanup_free_ int *fds = NULL; |
607 | struct bus_header *h = NULL; | |
608 | size_t total, n_bytes = 0, idx = 0; | |
69aec65c | 609 | const char *destination = NULL, *seclabel = NULL; |
6629161f LP |
610 | int r; |
611 | ||
612 | assert(bus); | |
613 | assert(k); | |
614 | assert(ret); | |
777d7a61 | 615 | assert(k->payload_type == KDBUS_PAYLOAD_DBUS1); |
6629161f | 616 | |
9eb34e82 | 617 | KDBUS_PART_FOREACH(d, k, items) { |
6629161f LP |
618 | size_t l; |
619 | ||
febfd508 | 620 | l = d->size - offsetof(struct kdbus_item, data); |
6629161f | 621 | |
777d7a61 | 622 | switch (d->type) { |
6629161f | 623 | |
777d7a61 | 624 | case KDBUS_ITEM_PAYLOAD_OFF: |
6629161f | 625 | if (!h) { |
62b3e928 | 626 | h = (struct bus_header *)((uint8_t *)bus->kdbus_buffer + d->vec.offset); |
c91cb83c LP |
627 | |
628 | if (!bus_header_is_complete(h, d->vec.size)) | |
629 | return -EBADMSG; | |
6629161f LP |
630 | } |
631 | ||
fd8d62d9 | 632 | n_bytes += d->vec.size; |
777d7a61 | 633 | break; |
6629161f | 634 | |
777d7a61 | 635 | case KDBUS_ITEM_PAYLOAD_MEMFD: |
1307c3ff LP |
636 | if (!h) |
637 | return -EBADMSG; | |
638 | ||
639 | n_bytes += d->memfd.size; | |
777d7a61 | 640 | break; |
1307c3ff | 641 | |
777d7a61 | 642 | case KDBUS_ITEM_FDS: { |
6629161f LP |
643 | int *f; |
644 | unsigned j; | |
645 | ||
646 | j = l / sizeof(int); | |
647 | f = realloc(fds, sizeof(int) * (n_fds + j)); | |
648 | if (!f) | |
649 | return -ENOMEM; | |
650 | ||
651 | fds = f; | |
9097fe29 | 652 | memcpy(fds + n_fds, d->fds, sizeof(int) * j); |
6629161f | 653 | n_fds += j; |
777d7a61 LP |
654 | break; |
655 | } | |
f9be01f3 | 656 | |
777d7a61 | 657 | case KDBUS_ITEM_SECLABEL: |
69aec65c | 658 | seclabel = d->str; |
777d7a61 LP |
659 | break; |
660 | } | |
6629161f LP |
661 | } |
662 | ||
663 | if (!h) | |
664 | return -EBADMSG; | |
665 | ||
c91cb83c | 666 | r = bus_header_message_size(h, &total); |
6629161f LP |
667 | if (r < 0) |
668 | return r; | |
669 | ||
670 | if (n_bytes != total) | |
671 | return -EBADMSG; | |
672 | ||
df2d202e | 673 | r = bus_message_from_header(bus, h, sizeof(struct bus_header), fds, n_fds, NULL, seclabel, 0, &m); |
6629161f LP |
674 | if (r < 0) |
675 | return r; | |
676 | ||
9eb34e82 | 677 | KDBUS_PART_FOREACH(d, k, items) { |
6629161f LP |
678 | size_t l; |
679 | ||
febfd508 | 680 | l = d->size - offsetof(struct kdbus_item, data); |
6629161f | 681 | |
777d7a61 LP |
682 | switch (d->type) { |
683 | ||
684 | case KDBUS_ITEM_PAYLOAD_OFF: { | |
bc7fd8cd | 685 | size_t begin_body; |
fd8d62d9 | 686 | |
c91cb83c | 687 | begin_body = BUS_MESSAGE_BODY_BEGIN(m); |
bc7fd8cd LP |
688 | |
689 | if (idx + d->vec.size > begin_body) { | |
690 | struct bus_body_part *part; | |
691 | ||
692 | /* Contains body material */ | |
693 | ||
694 | part = message_append_part(m); | |
695 | if (!part) { | |
1307c3ff LP |
696 | r = -ENOMEM; |
697 | goto fail; | |
bc7fd8cd LP |
698 | } |
699 | ||
62b3e928 KS |
700 | /* A -1 offset is NUL padding. */ |
701 | part->is_zero = d->vec.offset == ~0ULL; | |
702 | ||
bc7fd8cd | 703 | if (idx >= begin_body) { |
62b3e928 KS |
704 | if (!part->is_zero) |
705 | part->data = (uint8_t *)bus->kdbus_buffer + d->vec.offset; | |
bc7fd8cd LP |
706 | part->size = d->vec.size; |
707 | } else { | |
62b3e928 KS |
708 | if (!part->is_zero) |
709 | part->data = (uint8_t *)bus->kdbus_buffer + d->vec.offset + (begin_body - idx); | |
bc7fd8cd LP |
710 | part->size = d->vec.size - (begin_body - idx); |
711 | } | |
712 | ||
713 | part->sealed = true; | |
714 | } | |
fd8d62d9 LP |
715 | |
716 | idx += d->vec.size; | |
777d7a61 LP |
717 | break; |
718 | } | |
719 | ||
720 | case KDBUS_ITEM_PAYLOAD_MEMFD: { | |
1307c3ff LP |
721 | struct bus_body_part *part; |
722 | ||
723 | if (idx < BUS_MESSAGE_BODY_BEGIN(m)) { | |
724 | r = -EBADMSG; | |
725 | goto fail; | |
726 | } | |
727 | ||
728 | part = message_append_part(m); | |
729 | if (!part) { | |
730 | r = -ENOMEM; | |
731 | goto fail; | |
732 | } | |
733 | ||
734 | part->memfd = d->memfd.fd; | |
735 | part->size = d->memfd.size; | |
736 | part->sealed = true; | |
737 | ||
738 | idx += d->memfd.size; | |
777d7a61 LP |
739 | break; |
740 | } | |
69aec65c | 741 | |
777d7a61 | 742 | case KDBUS_ITEM_CREDS: |
5b12334d LP |
743 | m->creds.pid_starttime = d->creds.starttime / NSEC_PER_USEC; |
744 | m->creds.uid = d->creds.uid; | |
745 | m->creds.gid = d->creds.gid; | |
746 | m->creds.pid = d->creds.pid; | |
747 | m->creds.tid = d->creds.tid; | |
748 | m->creds.mask |= (SD_BUS_CREDS_UID|SD_BUS_CREDS_GID|SD_BUS_CREDS_PID|SD_BUS_CREDS_PID_STARTTIME|SD_BUS_CREDS_TID) & bus->creds_mask; | |
777d7a61 | 749 | break; |
5b12334d | 750 | |
777d7a61 | 751 | case KDBUS_ITEM_TIMESTAMP: |
69aec65c LP |
752 | m->realtime = d->timestamp.realtime_ns / NSEC_PER_USEC; |
753 | m->monotonic = d->timestamp.monotonic_ns / NSEC_PER_USEC; | |
777d7a61 | 754 | break; |
5b12334d | 755 | |
777d7a61 | 756 | case KDBUS_ITEM_PID_COMM: |
5b12334d LP |
757 | m->creds.comm = d->str; |
758 | m->creds.mask |= SD_BUS_CREDS_COMM & bus->creds_mask; | |
777d7a61 | 759 | break; |
5b12334d | 760 | |
777d7a61 | 761 | case KDBUS_ITEM_TID_COMM: |
5b12334d LP |
762 | m->creds.tid_comm = d->str; |
763 | m->creds.mask |= SD_BUS_CREDS_TID_COMM & bus->creds_mask; | |
777d7a61 | 764 | break; |
5b12334d | 765 | |
777d7a61 | 766 | case KDBUS_ITEM_EXE: |
5b12334d LP |
767 | m->creds.exe = d->str; |
768 | m->creds.mask |= SD_BUS_CREDS_EXE & bus->creds_mask; | |
777d7a61 | 769 | break; |
5b12334d | 770 | |
777d7a61 | 771 | case KDBUS_ITEM_CMDLINE: |
5b12334d LP |
772 | m->creds.cmdline = d->str; |
773 | m->creds.cmdline_length = l; | |
774 | m->creds.mask |= SD_BUS_CREDS_CMDLINE & bus->creds_mask; | |
777d7a61 | 775 | break; |
5b12334d | 776 | |
777d7a61 | 777 | case KDBUS_ITEM_CGROUP: |
5b12334d LP |
778 | m->creds.cgroup = d->str; |
779 | m->creds.mask |= (SD_BUS_CREDS_CGROUP|SD_BUS_CREDS_UNIT|SD_BUS_CREDS_USER_UNIT|SD_BUS_CREDS_SLICE|SD_BUS_CREDS_SESSION|SD_BUS_CREDS_OWNER_UID) & bus->creds_mask; | |
777d7a61 | 780 | break; |
5b12334d | 781 | |
777d7a61 | 782 | case KDBUS_ITEM_AUDIT: |
5b12334d LP |
783 | m->creds.audit_session_id = d->audit.sessionid; |
784 | m->creds.audit_login_uid = d->audit.loginuid; | |
785 | m->creds.mask |= (SD_BUS_CREDS_AUDIT_SESSION_ID|SD_BUS_CREDS_AUDIT_LOGIN_UID) & bus->creds_mask; | |
777d7a61 | 786 | break; |
5b12334d | 787 | |
777d7a61 | 788 | case KDBUS_ITEM_CAPS: |
5b12334d LP |
789 | m->creds.capability = d->data; |
790 | m->creds.capability_size = l; | |
791 | m->creds.mask |= (SD_BUS_CREDS_EFFECTIVE_CAPS|SD_BUS_CREDS_PERMITTED_CAPS|SD_BUS_CREDS_INHERITABLE_CAPS|SD_BUS_CREDS_BOUNDING_CAPS) & bus->creds_mask; | |
777d7a61 | 792 | break; |
5b12334d | 793 | |
777d7a61 | 794 | case KDBUS_ITEM_DST_NAME: |
1307c3ff | 795 | destination = d->str; |
777d7a61 LP |
796 | break; |
797 | ||
798 | case KDBUS_ITEM_FDS: | |
799 | case KDBUS_ITEM_SECLABEL: | |
800 | case KDBUS_ITEM_NAMES: | |
801 | break; | |
802 | ||
803 | default: | |
77930f11 | 804 | log_debug("Got unknown field from kernel %llu", d->type); |
777d7a61 | 805 | } |
69aec65c | 806 | } |
acb5a3cb | 807 | |
6629161f | 808 | r = bus_message_parse_fields(m); |
1307c3ff LP |
809 | if (r < 0) |
810 | goto fail; | |
6629161f | 811 | |
51038c03 LP |
812 | if (k->src_id == KDBUS_SRC_ID_KERNEL) |
813 | m->sender = "org.freedesktop.DBus"; | |
814 | else { | |
815 | snprintf(m->sender_buffer, sizeof(m->sender_buffer), ":1.%llu", (unsigned long long) k->src_id); | |
816 | m->sender = m->sender_buffer; | |
817 | } | |
818 | ||
819 | if (!m->destination) { | |
820 | if (destination) | |
821 | m->destination = destination; | |
822 | else if (k->dst_id != KDBUS_DST_ID_WELL_KNOWN_NAME && | |
823 | k->dst_id != KDBUS_DST_ID_BROADCAST) { | |
824 | snprintf(m->destination_buffer, sizeof(m->destination_buffer), ":1.%llu", (unsigned long long) k->dst_id); | |
825 | m->destination = m->destination_buffer; | |
826 | } | |
827 | } | |
828 | ||
6629161f LP |
829 | /* We take possession of the kmsg struct now */ |
830 | m->kdbus = k; | |
fd8d62d9 | 831 | m->release_kdbus = true; |
6629161f LP |
832 | m->free_fds = true; |
833 | ||
834 | fds = NULL; | |
835 | ||
836 | *ret = m; | |
837 | return 1; | |
1307c3ff LP |
838 | |
839 | fail: | |
840 | if (m) { | |
841 | struct bus_body_part *part; | |
842 | unsigned i; | |
843 | ||
844 | /* Make sure the memfds are not freed twice */ | |
845 | MESSAGE_FOREACH_PART(part, i, m) | |
846 | if (part->memfd >= 0) | |
847 | part->memfd = -1; | |
848 | ||
849 | sd_bus_message_unref(m); | |
850 | } | |
851 | ||
852 | return r; | |
6629161f LP |
853 | } |
854 | ||
855 | int bus_kernel_read_message(sd_bus *bus, sd_bus_message **m) { | |
62b3e928 | 856 | uint64_t off; |
6629161f | 857 | struct kdbus_msg *k; |
6629161f LP |
858 | int r; |
859 | ||
860 | assert(bus); | |
861 | assert(m); | |
862 | ||
62b3e928 | 863 | r = ioctl(bus->input_fd, KDBUS_CMD_MSG_RECV, &off); |
fd8d62d9 | 864 | if (r < 0) { |
6629161f LP |
865 | if (errno == EAGAIN) |
866 | return 0; | |
867 | ||
fd8d62d9 | 868 | return -errno; |
6629161f | 869 | } |
62b3e928 | 870 | k = (struct kdbus_msg *)((uint8_t *)bus->kdbus_buffer + off); |
6629161f | 871 | |
777d7a61 LP |
872 | if (k->payload_type == KDBUS_PAYLOAD_DBUS1) |
873 | r = bus_kernel_make_message(bus, k, m); | |
874 | else if (k->payload_type == KDBUS_PAYLOAD_KERNEL) | |
875 | r = bus_kernel_translate_message(bus, k, m); | |
876 | else | |
877 | r = 0; | |
878 | ||
fd8d62d9 LP |
879 | if (r <= 0) |
880 | close_kdbus_msg(bus, k); | |
6629161f | 881 | |
51038c03 | 882 | return r < 0 ? r : 1; |
6629161f LP |
883 | } |
884 | ||
885 | int bus_kernel_create(const char *name, char **s) { | |
5b7d4c1c | 886 | struct kdbus_cmd_bus_make *make; |
efa3c0af | 887 | struct kdbus_item *n; |
6629161f LP |
888 | size_t l; |
889 | int fd; | |
890 | char *p; | |
891 | ||
892 | assert(name); | |
893 | assert(s); | |
894 | ||
895 | fd = open("/dev/kdbus/control", O_RDWR|O_NOCTTY|O_CLOEXEC); | |
896 | if (fd < 0) | |
897 | return -errno; | |
898 | ||
899 | l = strlen(name); | |
a2cef833 | 900 | make = alloca0(offsetof(struct kdbus_cmd_bus_make, items) + |
9eb34e82 DM |
901 | KDBUS_PART_HEADER_SIZE + sizeof(uint64_t) + |
902 | KDBUS_PART_HEADER_SIZE + DECIMAL_STR_MAX(uid_t) + 1 + l + 1); | |
a2cef833 | 903 | |
efa3c0af | 904 | n = make->items; |
799e7ea8 | 905 | n->type = KDBUS_MAKE_NAME; |
a2cef833 | 906 | sprintf(n->str, "%lu-%s", (unsigned long) getuid(), name); |
9eb34e82 | 907 | n->size = KDBUS_PART_HEADER_SIZE + strlen(n->str) + 1; |
a2cef833 | 908 | |
efa3c0af | 909 | make->size = offsetof(struct kdbus_cmd_bus_make, items) + n->size; |
18cd014f | 910 | make->flags = KDBUS_MAKE_POLICY_OPEN; |
5b7d4c1c | 911 | make->bus_flags = 0; |
a56f19c4 | 912 | make->bloom_size = BLOOM_SIZE; |
a56f19c4 | 913 | assert_cc(BLOOM_SIZE % 8 == 0); |
5b7d4c1c | 914 | |
a2cef833 | 915 | p = strjoin("/dev/kdbus/", n->str, "/bus", NULL); |
6629161f LP |
916 | if (!p) |
917 | return -ENOMEM; | |
918 | ||
5b7d4c1c | 919 | if (ioctl(fd, KDBUS_CMD_BUS_MAKE, make) < 0) { |
6629161f LP |
920 | close_nointr_nofail(fd); |
921 | free(p); | |
922 | return -errno; | |
923 | } | |
924 | ||
925 | if (s) | |
926 | *s = p; | |
927 | ||
928 | return fd; | |
929 | } | |
bc7fd8cd LP |
930 | |
931 | int bus_kernel_pop_memfd(sd_bus *bus, void **address, size_t *size) { | |
932 | struct memfd_cache *c; | |
45fbe937 | 933 | int fd; |
bc7fd8cd LP |
934 | |
935 | assert(address); | |
936 | assert(size); | |
937 | ||
938 | if (!bus || !bus->is_kernel) | |
939 | return -ENOTSUP; | |
940 | ||
76b7742c | 941 | assert_se(pthread_mutex_lock(&bus->memfd_cache_mutex) >= 0); |
45fbe937 | 942 | |
bc7fd8cd | 943 | if (bus->n_memfd_cache <= 0) { |
45fbe937 LP |
944 | int r; |
945 | ||
76b7742c | 946 | assert_se(pthread_mutex_unlock(&bus->memfd_cache_mutex) >= 0); |
bc7fd8cd | 947 | |
9b05bc48 LP |
948 | r = ioctl(bus->input_fd, KDBUS_CMD_MEMFD_NEW, &fd); |
949 | if (r < 0) | |
bc7fd8cd LP |
950 | return -errno; |
951 | ||
952 | *address = NULL; | |
953 | *size = 0; | |
954 | return fd; | |
955 | } | |
956 | ||
bf30e48f | 957 | c = &bus->memfd_cache[--bus->n_memfd_cache]; |
bc7fd8cd LP |
958 | |
959 | assert(c->fd >= 0); | |
960 | assert(c->size == 0 || c->address); | |
961 | ||
962 | *address = c->address; | |
963 | *size = c->size; | |
45fbe937 LP |
964 | fd = c->fd; |
965 | ||
76b7742c | 966 | assert_se(pthread_mutex_unlock(&bus->memfd_cache_mutex) >= 0); |
bc7fd8cd | 967 | |
45fbe937 LP |
968 | return fd; |
969 | } | |
970 | ||
971 | static void close_and_munmap(int fd, void *address, size_t size) { | |
972 | if (size > 0) | |
76b7742c | 973 | assert_se(munmap(address, PAGE_ALIGN(size)) >= 0); |
45fbe937 LP |
974 | |
975 | close_nointr_nofail(fd); | |
bc7fd8cd LP |
976 | } |
977 | ||
978 | void bus_kernel_push_memfd(sd_bus *bus, int fd, void *address, size_t size) { | |
979 | struct memfd_cache *c; | |
76b7742c | 980 | uint64_t max_sz = PAGE_ALIGN(MEMFD_CACHE_ITEM_SIZE_MAX); |
bc7fd8cd LP |
981 | |
982 | assert(fd >= 0); | |
983 | assert(size == 0 || address); | |
984 | ||
45fbe937 LP |
985 | if (!bus || !bus->is_kernel) { |
986 | close_and_munmap(fd, address, size); | |
987 | return; | |
988 | } | |
989 | ||
76b7742c | 990 | assert_se(pthread_mutex_lock(&bus->memfd_cache_mutex) >= 0); |
bc7fd8cd | 991 | |
45fbe937 | 992 | if (bus->n_memfd_cache >= ELEMENTSOF(bus->memfd_cache)) { |
76b7742c | 993 | assert_se(pthread_mutex_unlock(&bus->memfd_cache_mutex) >= 0); |
bc7fd8cd | 994 | |
45fbe937 | 995 | close_and_munmap(fd, address, size); |
bc7fd8cd LP |
996 | return; |
997 | } | |
998 | ||
999 | c = &bus->memfd_cache[bus->n_memfd_cache++]; | |
1000 | c->fd = fd; | |
1001 | c->address = address; | |
1002 | ||
1003 | /* If overly long, let's return a bit to the OS */ | |
76b7742c LP |
1004 | if (size > max_sz) { |
1005 | assert_se(ioctl(fd, KDBUS_CMD_MEMFD_SIZE_SET, &max_sz) >= 0); | |
1006 | assert_se(munmap((uint8_t*) address + max_sz, PAGE_ALIGN(size - max_sz)) >= 0); | |
1007 | c->size = max_sz; | |
bc7fd8cd LP |
1008 | } else |
1009 | c->size = size; | |
45fbe937 | 1010 | |
76b7742c | 1011 | assert_se(pthread_mutex_unlock(&bus->memfd_cache_mutex) >= 0); |
bc7fd8cd LP |
1012 | } |
1013 | ||
1014 | void bus_kernel_flush_memfd(sd_bus *b) { | |
1015 | unsigned i; | |
1016 | ||
1017 | assert(b); | |
1018 | ||
76b7742c LP |
1019 | for (i = 0; i < b->n_memfd_cache; i++) |
1020 | close_and_munmap(b->memfd_cache[i].fd, b->memfd_cache[i].address, b->memfd_cache[i].size); | |
bc7fd8cd | 1021 | } |
0253ddcc | 1022 | |
98f17eda | 1023 | int kdbus_translate_request_name_flags(uint64_t sd_bus_flags, uint64_t *kdbus_flags) { |
0253ddcc DM |
1024 | |
1025 | assert_return(kdbus_flags != NULL, -EINVAL); | |
1026 | ||
1027 | *kdbus_flags = 0; | |
1028 | ||
1029 | if (sd_bus_flags & SD_BUS_NAME_ALLOW_REPLACEMENT) | |
1030 | *kdbus_flags |= KDBUS_NAME_ALLOW_REPLACEMENT; | |
1031 | ||
1032 | if (sd_bus_flags & SD_BUS_NAME_REPLACE_EXISTING) | |
1033 | *kdbus_flags |= KDBUS_NAME_REPLACE_EXISTING; | |
1034 | ||
1035 | if (!(sd_bus_flags & SD_BUS_NAME_DO_NOT_QUEUE)) | |
1036 | *kdbus_flags |= KDBUS_NAME_QUEUE; | |
1037 | ||
1038 | return 0; | |
1039 | } |