]>
Commit | Line | Data |
---|---|---|
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> |
e7d718af | 28 | #include <libgen.h> |
fd8d62d9 | 29 | #include <sys/mman.h> |
5972fe95 | 30 | #include <sys/prctl.h> |
6629161f LP |
31 | |
32 | #include "util.h" | |
65dae17a | 33 | #include "strv.h" |
6bcf0cf6 | 34 | #include "memfd-util.h" |
1a299299 LP |
35 | #include "cgroup-util.h" |
36 | #include "fileio.h" | |
6629161f LP |
37 | |
38 | #include "bus-internal.h" | |
39 | #include "bus-message.h" | |
40 | #include "bus-kernel.h" | |
a56f19c4 | 41 | #include "bus-bloom.h" |
777d7a61 | 42 | #include "bus-util.h" |
a6278b88 | 43 | #include "bus-label.h" |
777d7a61 LP |
44 | |
45 | #define UNIQUE_NAME_MAX (3+DECIMAL_STR_MAX(uint64_t)) | |
6629161f | 46 | |
c7819669 | 47 | int bus_kernel_parse_unique_name(const char *s, uint64_t *id) { |
6629161f LP |
48 | int r; |
49 | ||
50 | assert(s); | |
51 | assert(id); | |
52 | ||
53 | if (!startswith(s, ":1.")) | |
54 | return 0; | |
55 | ||
56 | r = safe_atou64(s + 3, id); | |
57 | if (r < 0) | |
58 | return r; | |
59 | ||
60 | return 1; | |
61 | } | |
62 | ||
febfd508 | 63 | static void append_payload_vec(struct kdbus_item **d, const void *p, size_t sz) { |
6629161f | 64 | assert(d); |
6629161f LP |
65 | assert(sz > 0); |
66 | ||
e86b80b8 LP |
67 | *d = ALIGN8_PTR(*d); |
68 | ||
66b26c5c LP |
69 | /* Note that p can be NULL, which encodes a region full of |
70 | * zeroes, which is useful to optimize certain padding | |
71 | * conditions */ | |
72 | ||
febfd508 | 73 | (*d)->size = offsetof(struct kdbus_item, vec) + sizeof(struct kdbus_vec); |
ea1edece | 74 | (*d)->type = KDBUS_ITEM_PAYLOAD_VEC; |
a392d361 | 75 | (*d)->vec.address = PTR_TO_UINT64(p); |
6629161f LP |
76 | (*d)->vec.size = sz; |
77 | ||
febfd508 | 78 | *d = (struct kdbus_item *) ((uint8_t*) *d + (*d)->size); |
6629161f LP |
79 | } |
80 | ||
a392d361 LP |
81 | static void append_payload_memfd(struct kdbus_item **d, int memfd, size_t sz) { |
82 | assert(d); | |
83 | assert(memfd >= 0); | |
84 | assert(sz > 0); | |
85 | ||
86 | *d = ALIGN8_PTR(*d); | |
87 | (*d)->size = offsetof(struct kdbus_item, memfd) + sizeof(struct kdbus_memfd); | |
ea1edece | 88 | (*d)->type = KDBUS_ITEM_PAYLOAD_MEMFD; |
a392d361 LP |
89 | (*d)->memfd.fd = memfd; |
90 | (*d)->memfd.size = sz; | |
91 | ||
92 | *d = (struct kdbus_item *) ((uint8_t*) *d + (*d)->size); | |
93 | } | |
94 | ||
febfd508 | 95 | static void append_destination(struct kdbus_item **d, const char *s, size_t length) { |
6629161f | 96 | assert(d); |
b5baa8fe | 97 | assert(s); |
6629161f | 98 | |
e86b80b8 LP |
99 | *d = ALIGN8_PTR(*d); |
100 | ||
febfd508 | 101 | (*d)->size = offsetof(struct kdbus_item, str) + length + 1; |
ea1edece | 102 | (*d)->type = KDBUS_ITEM_DST_NAME; |
51038c03 | 103 | memcpy((*d)->str, s, length + 1); |
6629161f | 104 | |
febfd508 | 105 | *d = (struct kdbus_item *) ((uint8_t*) *d + (*d)->size); |
6629161f LP |
106 | } |
107 | ||
18a28147 KS |
108 | static struct kdbus_bloom_filter *append_bloom(struct kdbus_item **d, size_t length) { |
109 | struct kdbus_item *i; | |
a56f19c4 | 110 | |
b5baa8fe | 111 | assert(d); |
b5baa8fe | 112 | |
18a28147 | 113 | i = ALIGN8_PTR(*d); |
b5baa8fe | 114 | |
18a28147 KS |
115 | i->size = offsetof(struct kdbus_item, bloom_filter) + |
116 | offsetof(struct kdbus_bloom_filter, data) + | |
117 | length; | |
118 | i->type = KDBUS_ITEM_BLOOM_FILTER; | |
b5baa8fe | 119 | |
18a28147 | 120 | *d = (struct kdbus_item *) ((uint8_t*) i + i->size); |
a56f19c4 | 121 | |
18a28147 | 122 | return &i->bloom_filter; |
a56f19c4 LP |
123 | } |
124 | ||
febfd508 | 125 | static void append_fds(struct kdbus_item **d, const int fds[], unsigned n_fds) { |
9097fe29 LP |
126 | assert(d); |
127 | assert(fds); | |
128 | assert(n_fds > 0); | |
129 | ||
130 | *d = ALIGN8_PTR(*d); | |
febfd508 | 131 | (*d)->size = offsetof(struct kdbus_item, fds) + sizeof(int) * n_fds; |
ea1edece | 132 | (*d)->type = KDBUS_ITEM_FDS; |
9097fe29 LP |
133 | memcpy((*d)->fds, fds, sizeof(int) * n_fds); |
134 | ||
febfd508 | 135 | *d = (struct kdbus_item *) ((uint8_t*) *d + (*d)->size); |
9097fe29 LP |
136 | } |
137 | ||
18a28147 KS |
138 | static int bus_message_setup_bloom(sd_bus_message *m, struct kdbus_bloom_filter *bloom) { |
139 | void *data; | |
a56f19c4 LP |
140 | unsigned i; |
141 | int r; | |
142 | ||
143 | assert(m); | |
144 | assert(bloom); | |
145 | ||
18a28147 | 146 | data = bloom->data; |
29804cc1 | 147 | memzero(data, m->bus->bloom_size); |
18a28147 | 148 | bloom->generation = 0; |
a56f19c4 | 149 | |
b28ff39f | 150 | bloom_add_pair(data, m->bus->bloom_size, m->bus->bloom_n_hash, "message-type", bus_message_type_to_string(m->header->type)); |
a56f19c4 LP |
151 | |
152 | if (m->interface) | |
b28ff39f | 153 | bloom_add_pair(data, m->bus->bloom_size, m->bus->bloom_n_hash, "interface", m->interface); |
a56f19c4 | 154 | if (m->member) |
b28ff39f | 155 | bloom_add_pair(data, m->bus->bloom_size, m->bus->bloom_n_hash, "member", m->member); |
a56f19c4 | 156 | if (m->path) { |
b28ff39f LP |
157 | bloom_add_pair(data, m->bus->bloom_size, m->bus->bloom_n_hash, "path", m->path); |
158 | bloom_add_pair(data, m->bus->bloom_size, m->bus->bloom_n_hash, "path-slash-prefix", m->path); | |
159 | bloom_add_prefixes(data, m->bus->bloom_size, m->bus->bloom_n_hash, "path-slash-prefix", m->path, '/'); | |
a56f19c4 LP |
160 | } |
161 | ||
162 | r = sd_bus_message_rewind(m, true); | |
163 | if (r < 0) | |
164 | return r; | |
165 | ||
166 | for (i = 0; i < 64; i++) { | |
167 | char type; | |
168 | const char *t; | |
169 | char buf[sizeof("arg")-1 + 2 + sizeof("-slash-prefix")]; | |
170 | char *e; | |
171 | ||
172 | r = sd_bus_message_peek_type(m, &type, NULL); | |
173 | if (r < 0) | |
174 | return r; | |
175 | ||
176 | if (type != SD_BUS_TYPE_STRING && | |
177 | type != SD_BUS_TYPE_OBJECT_PATH && | |
178 | type != SD_BUS_TYPE_SIGNATURE) | |
179 | break; | |
180 | ||
181 | r = sd_bus_message_read_basic(m, type, &t); | |
182 | if (r < 0) | |
183 | return r; | |
184 | ||
185 | e = stpcpy(buf, "arg"); | |
186 | if (i < 10) | |
693eb9a2 | 187 | *(e++) = '0' + (char) i; |
a56f19c4 | 188 | else { |
693eb9a2 LP |
189 | *(e++) = '0' + (char) (i / 10); |
190 | *(e++) = '0' + (char) (i % 10); | |
a56f19c4 LP |
191 | } |
192 | ||
193 | *e = 0; | |
b28ff39f | 194 | bloom_add_pair(data, m->bus->bloom_size, m->bus->bloom_n_hash, buf, t); |
a56f19c4 LP |
195 | |
196 | strcpy(e, "-dot-prefix"); | |
b28ff39f | 197 | bloom_add_prefixes(data, m->bus->bloom_size, m->bus->bloom_n_hash, buf, t, '.'); |
a56f19c4 | 198 | strcpy(e, "-slash-prefix"); |
b28ff39f | 199 | bloom_add_prefixes(data, m->bus->bloom_size, m->bus->bloom_n_hash, buf, t, '/'); |
a56f19c4 LP |
200 | } |
201 | ||
202 | return 0; | |
b5baa8fe LP |
203 | } |
204 | ||
5b7d4c1c | 205 | static int bus_message_setup_kmsg(sd_bus *b, sd_bus_message *m) { |
9b29bb68 | 206 | struct bus_body_part *part; |
febfd508 | 207 | struct kdbus_item *d; |
022fb855 | 208 | const char *destination; |
6629161f LP |
209 | bool well_known; |
210 | uint64_t unique; | |
211 | size_t sz, dl; | |
9b29bb68 | 212 | unsigned i; |
6629161f LP |
213 | int r; |
214 | ||
5b7d4c1c | 215 | assert(b); |
6629161f LP |
216 | assert(m); |
217 | assert(m->sealed); | |
e9a967f9 | 218 | |
069f5e61 LP |
219 | /* We put this together only once, if this message is reused |
220 | * we reuse the earlier-built version */ | |
e9a967f9 LP |
221 | if (m->kdbus) |
222 | return 0; | |
6629161f | 223 | |
022fb855 DM |
224 | destination = m->destination ?: m->destination_ptr; |
225 | ||
226 | if (destination) { | |
227 | r = bus_kernel_parse_unique_name(destination, &unique); | |
6629161f LP |
228 | if (r < 0) |
229 | return r; | |
230 | ||
231 | well_known = r == 0; | |
232 | } else | |
233 | well_known = false; | |
234 | ||
b1454bf0 | 235 | sz = offsetof(struct kdbus_msg, items); |
6629161f | 236 | |
a392d361 LP |
237 | assert_cc(ALIGN8(offsetof(struct kdbus_item, vec) + sizeof(struct kdbus_vec)) == |
238 | ALIGN8(offsetof(struct kdbus_item, memfd) + sizeof(struct kdbus_memfd))); | |
239 | ||
69aec65c | 240 | /* Add in fixed header, fields header and payload */ |
c91cb83c | 241 | sz += (1 + m->n_body_parts) * |
bc7fd8cd | 242 | ALIGN8(offsetof(struct kdbus_item, vec) + sizeof(struct kdbus_vec)); |
6629161f | 243 | |
69aec65c | 244 | /* Add space for bloom filter */ |
18a28147 KS |
245 | sz += ALIGN8(offsetof(struct kdbus_item, bloom_filter) + |
246 | offsetof(struct kdbus_bloom_filter, data) + | |
b28ff39f | 247 | m->bus->bloom_size); |
b5baa8fe | 248 | |
6629161f LP |
249 | /* Add in well-known destination header */ |
250 | if (well_known) { | |
022fb855 | 251 | dl = strlen(destination); |
febfd508 | 252 | sz += ALIGN8(offsetof(struct kdbus_item, str) + dl + 1); |
6629161f LP |
253 | } |
254 | ||
9097fe29 LP |
255 | /* Add space for unix fds */ |
256 | if (m->n_fds > 0) | |
febfd508 | 257 | sz += ALIGN8(offsetof(struct kdbus_item, fds) + sizeof(int)*m->n_fds); |
9097fe29 | 258 | |
c556fe79 | 259 | m->kdbus = memalign(8, sz); |
66b26c5c LP |
260 | if (!m->kdbus) { |
261 | r = -ENOMEM; | |
262 | goto fail; | |
263 | } | |
6629161f | 264 | |
66b26c5c | 265 | m->free_kdbus = true; |
29804cc1 | 266 | memzero(m->kdbus, sz); |
d9115e18 | 267 | |
6629161f | 268 | m->kdbus->flags = |
0461f8cd | 269 | ((m->header->flags & BUS_MESSAGE_NO_REPLY_EXPECTED) ? 0 : KDBUS_MSG_FLAGS_EXPECT_REPLY) | |
97f82db3 | 270 | ((m->header->flags & BUS_MESSAGE_NO_AUTO_START) ? KDBUS_MSG_FLAGS_NO_AUTO_START : 0); |
022fb855 | 271 | |
7fa934b0 | 272 | if (well_known) |
022fb855 DM |
273 | /* verify_destination_id will usually be 0, which makes the kernel driver only look |
274 | * at the provided well-known name. Otherwise, the kernel will make sure the provided | |
275 | * destination id matches the owner of the provided weel-known-name, and fail if they | |
276 | * differ. Currently, this is only needed for bus-proxyd. */ | |
277 | m->kdbus->dst_id = m->verify_destination_id; | |
7fa934b0 | 278 | else |
022fb855 | 279 | m->kdbus->dst_id = destination ? unique : KDBUS_DST_ID_BROADCAST; |
022fb855 | 280 | |
6647dc66 | 281 | m->kdbus->payload_type = KDBUS_PAYLOAD_DBUS; |
42c4ebcb | 282 | m->kdbus->cookie = (uint64_t) m->header->serial; |
ca7b42c8 | 283 | m->kdbus->priority = m->priority; |
80a33f11 | 284 | |
7fa934b0 | 285 | if (m->header->flags & BUS_MESSAGE_NO_REPLY_EXPECTED) |
693eb9a2 | 286 | m->kdbus->cookie_reply = m->reply_cookie; |
7fa934b0 | 287 | else { |
03785ad0 DM |
288 | struct timespec now; |
289 | ||
b680a194 | 290 | assert_se(clock_gettime(CLOCK_MONOTONIC_COARSE, &now) == 0); |
03785ad0 DM |
291 | m->kdbus->timeout_ns = now.tv_sec * NSEC_PER_SEC + now.tv_nsec + |
292 | m->timeout * NSEC_PER_USEC; | |
293 | } | |
6629161f | 294 | |
b1454bf0 | 295 | d = m->kdbus->items; |
6629161f LP |
296 | |
297 | if (well_known) | |
022fb855 | 298 | append_destination(&d, destination, dl); |
6629161f | 299 | |
c91cb83c | 300 | append_payload_vec(&d, m->header, BUS_MESSAGE_BODY_BEGIN(m)); |
a392d361 LP |
301 | |
302 | MESSAGE_FOREACH_PART(part, i, m) { | |
303 | if (part->is_zero) { | |
66b26c5c LP |
304 | /* If this is padding then simply send a |
305 | * vector with a NULL data pointer which the | |
306 | * kernel will just pass through. This is the | |
307 | * most efficient way to encode zeroes */ | |
308 | ||
a392d361 LP |
309 | append_payload_vec(&d, NULL, part->size); |
310 | continue; | |
311 | } | |
312 | ||
022fb855 | 313 | if (part->memfd >= 0 && part->sealed && destination) { |
66b26c5c LP |
314 | /* Try to send a memfd, if the part is |
315 | * sealed and this is not a broadcast. Since we can only */ | |
a392d361 | 316 | |
66b26c5c LP |
317 | append_payload_memfd(&d, part->memfd, part->size); |
318 | continue; | |
a392d361 LP |
319 | } |
320 | ||
73e231ab JE |
321 | /* Otherwise, let's send a vector to the actual data. |
322 | * For that, we need to map it first. */ | |
66b26c5c LP |
323 | r = bus_body_part_map(part); |
324 | if (r < 0) | |
325 | goto fail; | |
a392d361 | 326 | |
bc7fd8cd | 327 | append_payload_vec(&d, part->data, part->size); |
a392d361 | 328 | } |
6629161f | 329 | |
5b7d4c1c | 330 | if (m->kdbus->dst_id == KDBUS_DST_ID_BROADCAST) { |
18a28147 | 331 | struct kdbus_bloom_filter *bloom; |
5b7d4c1c | 332 | |
b28ff39f | 333 | bloom = append_bloom(&d, m->bus->bloom_size); |
18a28147 | 334 | r = bus_message_setup_bloom(m, bloom); |
a392d361 LP |
335 | if (r < 0) |
336 | goto fail; | |
5b7d4c1c | 337 | } |
b5baa8fe | 338 | |
9097fe29 LP |
339 | if (m->n_fds > 0) |
340 | append_fds(&d, m->fds, m->n_fds); | |
341 | ||
e9a967f9 | 342 | m->kdbus->size = (uint8_t*) d - (uint8_t*) m->kdbus; |
6629161f LP |
343 | assert(m->kdbus->size <= sz); |
344 | ||
345 | return 0; | |
a392d361 LP |
346 | |
347 | fail: | |
66b26c5c | 348 | m->poisoned = true; |
a392d361 | 349 | return r; |
6629161f LP |
350 | } |
351 | ||
7d31d924 LP |
352 | static void bus_message_set_sender_driver(sd_bus *bus, sd_bus_message *m) { |
353 | assert(bus); | |
354 | assert(m); | |
355 | ||
356 | m->sender = m->creds.unique_name = (char*) "org.freedesktop.DBus"; | |
357 | m->creds.well_known_names_driver = true; | |
358 | m->creds.mask |= (SD_BUS_CREDS_UNIQUE_NAME|SD_BUS_CREDS_WELL_KNOWN_NAMES) & bus->creds_mask; | |
359 | } | |
360 | ||
125dd074 ZJS |
361 | static void unset_memfds(struct sd_bus_message *m) { |
362 | struct bus_body_part *part; | |
363 | unsigned i; | |
364 | ||
365 | assert(m); | |
366 | ||
367 | /* Make sure the memfds are not freed twice */ | |
368 | MESSAGE_FOREACH_PART(part, i, m) | |
369 | if (part->memfd >= 0) | |
370 | part->memfd = -1; | |
371 | } | |
372 | ||
cb67f718 DM |
373 | static int bus_kernel_make_message(sd_bus *bus, struct kdbus_msg *k) { |
374 | sd_bus_message *m = NULL; | |
375 | struct kdbus_item *d; | |
376 | unsigned n_fds = 0; | |
377 | _cleanup_free_ int *fds = NULL; | |
378 | struct bus_header *h = NULL; | |
379 | size_t total, n_bytes = 0, idx = 0; | |
380 | const char *destination = NULL, *seclabel = NULL; | |
6629161f LP |
381 | int r; |
382 | ||
cb67f718 DM |
383 | assert(bus); |
384 | assert(k); | |
385 | assert(k->payload_type == KDBUS_PAYLOAD_DBUS); | |
35460afc | 386 | |
cb67f718 DM |
387 | KDBUS_ITEM_FOREACH(d, k, items) { |
388 | size_t l; | |
f08838da | 389 | |
cb67f718 | 390 | l = d->size - offsetof(struct kdbus_item, data); |
8f155917 | 391 | |
cb67f718 | 392 | switch (d->type) { |
62b3e928 | 393 | |
cb67f718 DM |
394 | case KDBUS_ITEM_PAYLOAD_OFF: |
395 | if (!h) { | |
396 | h = (struct bus_header *)((uint8_t *)k + d->vec.offset); | |
8a0e0ed9 | 397 | |
cb67f718 DM |
398 | if (!bus_header_is_complete(h, d->vec.size)) |
399 | return -EBADMSG; | |
400 | } | |
8a0e0ed9 | 401 | |
cb67f718 DM |
402 | n_bytes += d->vec.size; |
403 | break; | |
8a0e0ed9 | 404 | |
cb67f718 DM |
405 | case KDBUS_ITEM_PAYLOAD_MEMFD: |
406 | if (!h) | |
407 | return -EBADMSG; | |
8a0e0ed9 | 408 | |
cb67f718 DM |
409 | n_bytes += d->memfd.size; |
410 | break; | |
8a0e0ed9 | 411 | |
cb67f718 DM |
412 | case KDBUS_ITEM_FDS: { |
413 | int *f; | |
414 | unsigned j; | |
8a0e0ed9 | 415 | |
cb67f718 DM |
416 | j = l / sizeof(int); |
417 | f = realloc(fds, sizeof(int) * (n_fds + j)); | |
418 | if (!f) | |
419 | return -ENOMEM; | |
8a0e0ed9 | 420 | |
cb67f718 DM |
421 | fds = f; |
422 | memcpy(fds + n_fds, d->fds, sizeof(int) * j); | |
423 | n_fds += j; | |
424 | break; | |
425 | } | |
62b3e928 | 426 | |
cb67f718 DM |
427 | case KDBUS_ITEM_SECLABEL: |
428 | seclabel = d->str; | |
429 | break; | |
fd8d62d9 LP |
430 | } |
431 | } | |
432 | ||
cb67f718 DM |
433 | if (!h) |
434 | return -EBADMSG; | |
de297575 | 435 | |
cb67f718 DM |
436 | r = bus_header_message_size(h, &total); |
437 | if (r < 0) | |
438 | return r; | |
219728b3 | 439 | |
cb67f718 DM |
440 | if (n_bytes != total) |
441 | return -EBADMSG; | |
6629161f | 442 | |
cb67f718 DM |
443 | /* on kdbus we only speak native endian gvariant, never dbus1 |
444 | * marshalling or reverse endian */ | |
445 | if (h->version != 2 || | |
446 | h->endian != BUS_NATIVE_ENDIAN) | |
447 | return -EPROTOTYPE; | |
c58dea19 | 448 | |
cb67f718 DM |
449 | r = bus_message_from_header(bus, h, sizeof(struct bus_header), fds, n_fds, NULL, seclabel, 0, &m); |
450 | if (r < 0) | |
451 | return r; | |
6629161f | 452 | |
cb67f718 DM |
453 | /* The well-known names list is different from the other |
454 | credentials. If we asked for it, but nothing is there, this | |
455 | means that the list of well-known names is simply empty, not | |
456 | that we lack any data */ | |
35460afc | 457 | |
cb67f718 | 458 | m->creds.mask |= (SD_BUS_CREDS_UNIQUE_NAME|SD_BUS_CREDS_WELL_KNOWN_NAMES) & bus->creds_mask; |
f08838da | 459 | |
cb67f718 DM |
460 | KDBUS_ITEM_FOREACH(d, k, items) { |
461 | size_t l; | |
6629161f | 462 | |
cb67f718 | 463 | l = d->size - offsetof(struct kdbus_item, data); |
6629161f | 464 | |
cb67f718 | 465 | switch (d->type) { |
6629161f | 466 | |
cb67f718 DM |
467 | case KDBUS_ITEM_PAYLOAD_OFF: { |
468 | size_t begin_body; | |
6629161f | 469 | |
cb67f718 | 470 | begin_body = BUS_MESSAGE_BODY_BEGIN(m); |
6629161f | 471 | |
cb67f718 DM |
472 | if (idx + d->vec.size > begin_body) { |
473 | struct bus_body_part *part; | |
a43b9ca3 | 474 | |
cb67f718 | 475 | /* Contains body material */ |
6629161f | 476 | |
cb67f718 DM |
477 | part = message_append_part(m); |
478 | if (!part) { | |
479 | r = -ENOMEM; | |
480 | goto fail; | |
481 | } | |
a43b9ca3 | 482 | |
cb67f718 DM |
483 | /* A -1 offset is NUL padding. */ |
484 | part->is_zero = d->vec.offset == ~0ULL; | |
a43b9ca3 | 485 | |
cb67f718 DM |
486 | if (idx >= begin_body) { |
487 | if (!part->is_zero) | |
488 | part->data = (uint8_t *)k + d->vec.offset; | |
489 | part->size = d->vec.size; | |
490 | } else { | |
491 | if (!part->is_zero) | |
492 | part->data = (uint8_t *)k + d->vec.offset + (begin_body - idx); | |
493 | part->size = d->vec.size - (begin_body - idx); | |
494 | } | |
a43b9ca3 | 495 | |
cb67f718 | 496 | part->sealed = true; |
ff4994c5 | 497 | } |
a43b9ca3 | 498 | |
cb67f718 DM |
499 | idx += d->vec.size; |
500 | break; | |
501 | } | |
a43b9ca3 | 502 | |
cb67f718 DM |
503 | case KDBUS_ITEM_PAYLOAD_MEMFD: { |
504 | struct bus_body_part *part; | |
a43b9ca3 | 505 | |
cb67f718 DM |
506 | if (idx < BUS_MESSAGE_BODY_BEGIN(m)) { |
507 | r = -EBADMSG; | |
508 | goto fail; | |
ff4994c5 | 509 | } |
a43b9ca3 | 510 | |
cb67f718 DM |
511 | part = message_append_part(m); |
512 | if (!part) { | |
513 | r = -ENOMEM; | |
514 | goto fail; | |
515 | } | |
a43b9ca3 | 516 | |
cb67f718 DM |
517 | part->memfd = d->memfd.fd; |
518 | part->size = d->memfd.size; | |
519 | part->sealed = true; | |
a43b9ca3 | 520 | |
cb67f718 DM |
521 | idx += d->memfd.size; |
522 | break; | |
523 | } | |
a43b9ca3 | 524 | |
705a415f LP |
525 | case KDBUS_ITEM_PIDS: |
526 | ||
527 | /* The PID starttime/TID might be missing, | |
528 | * when the data is faked by some data bus | |
529 | * proxy and it lacks that information about | |
530 | * the real client since SO_PEERCRED is used | |
531 | * for that. */ | |
532 | ||
533 | if (d->pids.pid > 0) { | |
534 | m->creds.pid = (pid_t) d->pids.pid; | |
535 | m->creds.mask |= SD_BUS_CREDS_PID & bus->creds_mask; | |
536 | } | |
537 | ||
538 | if (d->pids.starttime > 0) { | |
539 | m->creds.pid_starttime = d->pids.starttime / NSEC_PER_USEC; | |
cb67f718 DM |
540 | m->creds.mask |= SD_BUS_CREDS_PID_STARTTIME & bus->creds_mask; |
541 | } | |
6629161f | 542 | |
705a415f LP |
543 | if (d->pids.tid > 0) { |
544 | m->creds.tid = (pid_t) d->pids.tid; | |
cb67f718 DM |
545 | m->creds.mask |= SD_BUS_CREDS_TID & bus->creds_mask; |
546 | } | |
705a415f LP |
547 | |
548 | break; | |
549 | ||
550 | case KDBUS_ITEM_CREDS: | |
551 | ||
552 | /* EUID/SUID/FSUID/EGID/SGID/FSGID might be missing too (see above). */ | |
553 | ||
554 | if ((uid_t) d->creds.uid != (uid_t) -1) { | |
555 | m->creds.uid = (uid_t) d->creds.uid; | |
556 | m->creds.mask |= SD_BUS_CREDS_UID & bus->creds_mask; | |
557 | } | |
558 | ||
559 | if ((uid_t) d->creds.euid != (uid_t) -1) { | |
560 | m->creds.euid = (uid_t) d->creds.euid; | |
561 | m->creds.mask |= SD_BUS_CREDS_EUID & bus->creds_mask; | |
562 | } | |
563 | ||
564 | if ((uid_t) d->creds.suid != (uid_t) -1) { | |
565 | m->creds.suid = (uid_t) d->creds.suid; | |
566 | m->creds.mask |= SD_BUS_CREDS_SUID & bus->creds_mask; | |
567 | } | |
568 | ||
569 | if ((uid_t) d->creds.fsuid != (uid_t) -1) { | |
570 | m->creds.fsuid = (uid_t) d->creds.fsuid; | |
571 | m->creds.mask |= SD_BUS_CREDS_FSUID & bus->creds_mask; | |
572 | } | |
573 | ||
574 | if ((gid_t) d->creds.gid != (gid_t) -1) { | |
575 | m->creds.gid = (gid_t) d->creds.gid; | |
576 | m->creds.mask |= SD_BUS_CREDS_GID & bus->creds_mask; | |
577 | } | |
578 | ||
579 | if ((gid_t) d->creds.egid != (gid_t) -1) { | |
580 | m->creds.egid = (gid_t) d->creds.egid; | |
581 | m->creds.mask |= SD_BUS_CREDS_EGID & bus->creds_mask; | |
582 | } | |
583 | ||
584 | if ((gid_t) d->creds.sgid != (gid_t) -1) { | |
585 | m->creds.sgid = (gid_t) d->creds.sgid; | |
586 | m->creds.mask |= SD_BUS_CREDS_SGID & bus->creds_mask; | |
587 | } | |
588 | ||
589 | if ((gid_t) d->creds.fsgid != (gid_t) -1) { | |
590 | m->creds.fsgid = (gid_t) d->creds.fsgid; | |
591 | m->creds.mask |= SD_BUS_CREDS_FSGID & bus->creds_mask; | |
592 | } | |
593 | ||
cb67f718 | 594 | break; |
6629161f | 595 | |
cb67f718 | 596 | case KDBUS_ITEM_TIMESTAMP: |
41add995 LP |
597 | |
598 | if (bus->attach_flags & KDBUS_ATTACH_TIMESTAMP) { | |
599 | m->realtime = d->timestamp.realtime_ns / NSEC_PER_USEC; | |
600 | m->monotonic = d->timestamp.monotonic_ns / NSEC_PER_USEC; | |
601 | m->seqnum = d->timestamp.seqnum; | |
602 | } | |
603 | ||
cb67f718 | 604 | break; |
fd8d62d9 | 605 | |
cb67f718 DM |
606 | case KDBUS_ITEM_PID_COMM: |
607 | m->creds.comm = d->str; | |
608 | m->creds.mask |= SD_BUS_CREDS_COMM & bus->creds_mask; | |
609 | break; | |
fd8d62d9 | 610 | |
cb67f718 DM |
611 | case KDBUS_ITEM_TID_COMM: |
612 | m->creds.tid_comm = d->str; | |
613 | m->creds.mask |= SD_BUS_CREDS_TID_COMM & bus->creds_mask; | |
614 | break; | |
6629161f | 615 | |
cb67f718 DM |
616 | case KDBUS_ITEM_EXE: |
617 | m->creds.exe = d->str; | |
618 | m->creds.mask |= SD_BUS_CREDS_EXE & bus->creds_mask; | |
619 | break; | |
6629161f | 620 | |
cb67f718 DM |
621 | case KDBUS_ITEM_CMDLINE: |
622 | m->creds.cmdline = d->str; | |
623 | m->creds.cmdline_size = l; | |
624 | m->creds.mask |= SD_BUS_CREDS_CMDLINE & bus->creds_mask; | |
625 | break; | |
777d7a61 | 626 | |
cb67f718 DM |
627 | case KDBUS_ITEM_CGROUP: |
628 | m->creds.cgroup = d->str; | |
629 | 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 | 630 | |
fe3f22d1 DK |
631 | r = bus_get_root_path(bus); |
632 | if (r < 0) | |
633 | goto fail; | |
777d7a61 | 634 | |
cb67f718 | 635 | m->creds.cgroup_root = bus->cgroup_root; |
777d7a61 | 636 | |
cb67f718 | 637 | break; |
777d7a61 | 638 | |
cb67f718 | 639 | case KDBUS_ITEM_AUDIT: |
6dfcc64b LP |
640 | if ((uint32_t) d->audit.sessionid != (uint32_t) -1) { |
641 | m->creds.audit_session_id = (uint32_t) d->audit.sessionid; | |
642 | m->creds.mask |= SD_BUS_CREDS_AUDIT_SESSION_ID & bus->creds_mask; | |
643 | } | |
644 | ||
645 | if ((uid_t) d->audit.loginuid != (uid_t) -1) { | |
646 | m->creds.audit_login_uid = (uid_t) d->audit.loginuid; | |
647 | m->creds.mask |= SD_BUS_CREDS_AUDIT_LOGIN_UID & bus->creds_mask; | |
648 | } | |
cb67f718 | 649 | break; |
777d7a61 | 650 | |
cb67f718 | 651 | case KDBUS_ITEM_CAPS: |
5ebe2ce7 DM |
652 | m->creds.capability = (uint8_t *) d->caps.caps; |
653 | m->creds.capability_size = d->size - offsetof(struct kdbus_item, caps.caps); | |
cb67f718 DM |
654 | 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; |
655 | break; | |
219728b3 | 656 | |
cb67f718 | 657 | case KDBUS_ITEM_DST_NAME: |
9f6dfd06 LP |
658 | if (!service_name_is_valid(d->str)) { |
659 | r = -EBADMSG; | |
660 | goto fail; | |
661 | } | |
219728b3 | 662 | |
cb67f718 DM |
663 | destination = d->str; |
664 | break; | |
777d7a61 | 665 | |
635f9f0d | 666 | case KDBUS_ITEM_OWNED_NAME: |
9f6dfd06 LP |
667 | if (!service_name_is_valid(d->name.name)) { |
668 | r = -EBADMSG; | |
cb67f718 | 669 | goto fail; |
9f6dfd06 LP |
670 | } |
671 | ||
672 | if (bus->creds_mask & SD_BUS_CREDS_WELL_KNOWN_NAMES) { | |
50c45216 LP |
673 | char **wkn; |
674 | size_t n; | |
675 | ||
676 | /* We just extend the array here, but | |
677 | * do not allocate the strings inside | |
678 | * of it, instead we just point to our | |
679 | * buffer directly. */ | |
680 | n = strv_length(m->creds.well_known_names); | |
681 | wkn = realloc(m->creds.well_known_names, (n + 2) * sizeof(char*)); | |
682 | if (!wkn) { | |
683 | r = -ENOMEM; | |
9f6dfd06 | 684 | goto fail; |
50c45216 LP |
685 | } |
686 | ||
687 | wkn[n] = d->name.name; | |
688 | wkn[n+1] = NULL; | |
689 | m->creds.well_known_names = wkn; | |
9f6dfd06 LP |
690 | |
691 | m->creds.mask |= SD_BUS_CREDS_WELL_KNOWN_NAMES; | |
692 | } | |
cb67f718 | 693 | break; |
777d7a61 | 694 | |
635f9f0d | 695 | case KDBUS_ITEM_CONN_DESCRIPTION: |
455971c1 LP |
696 | m->creds.description = d->str; |
697 | m->creds.mask |= SD_BUS_CREDS_DESCRIPTION & bus->creds_mask; | |
cccb0b2c LP |
698 | break; |
699 | ||
02581590 LP |
700 | case KDBUS_ITEM_AUXGROUPS: |
701 | ||
702 | if (bus->creds_mask & SD_BUS_CREDS_SUPPLEMENTARY_GIDS) { | |
e12d81ae | 703 | assert_cc(sizeof(gid_t) == sizeof(uint32_t)); |
02581590 | 704 | |
e12d81ae LP |
705 | m->creds.n_supplementary_gids = (d->size - offsetof(struct kdbus_item, data32)) / sizeof(uint32_t); |
706 | m->creds.supplementary_gids = (gid_t*) d->data32; | |
02581590 LP |
707 | m->creds.mask |= SD_BUS_CREDS_SUPPLEMENTARY_GIDS; |
708 | } | |
709 | ||
710 | break; | |
711 | ||
cb67f718 DM |
712 | case KDBUS_ITEM_FDS: |
713 | case KDBUS_ITEM_SECLABEL: | |
714 | break; | |
d78bf250 | 715 | |
cb67f718 DM |
716 | default: |
717 | log_debug("Got unknown field from kernel %llu", d->type); | |
718 | } | |
719 | } | |
d78bf250 | 720 | |
38ce47e2 LP |
721 | /* If we requested the list of well-known names to be appended |
722 | * and the sender had none no item for it will be | |
723 | * attached. However, this does *not* mean that we the kernel | |
724 | * didn't want to provide this information to us. Hence, let's | |
725 | * explicitly mark this information as available if it was | |
726 | * requested. */ | |
727 | m->creds.mask |= bus->creds_mask & SD_BUS_CREDS_WELL_KNOWN_NAMES; | |
728 | ||
cb67f718 DM |
729 | r = bus_message_parse_fields(m); |
730 | if (r < 0) | |
731 | goto fail; | |
777d7a61 | 732 | |
7fa934b0 LP |
733 | /* Refuse messages if kdbus and dbus1 cookie doesn't match up */ |
734 | if ((uint64_t) m->header->serial != k->cookie) { | |
735 | r = -EBADMSG; | |
736 | goto fail; | |
737 | } | |
738 | ||
739 | /* Refuse messages where the reply flag doesn't match up */ | |
740 | if (!(m->header->flags & BUS_MESSAGE_NO_REPLY_EXPECTED) != !!(k->flags & KDBUS_MSG_FLAGS_EXPECT_REPLY)) { | |
741 | r = -EBADMSG; | |
742 | goto fail; | |
743 | } | |
744 | ||
745 | /* Refuse reply messages where the reply cookie doesn't match up */ | |
746 | if ((m->header->flags & BUS_MESSAGE_NO_REPLY_EXPECTED) && m->reply_cookie != k->cookie_reply) { | |
747 | r = -EBADMSG; | |
748 | goto fail; | |
749 | } | |
750 | ||
751 | /* Refuse messages where the autostart flag doesn't match up */ | |
752 | if (!(m->header->flags & BUS_MESSAGE_NO_AUTO_START) != !(k->flags & KDBUS_MSG_FLAGS_NO_AUTO_START)) { | |
753 | r = -EBADMSG; | |
754 | goto fail; | |
755 | } | |
756 | ||
cb67f718 | 757 | /* Override information from the user header with data from the kernel */ |
7d31d924 LP |
758 | if (k->src_id == KDBUS_SRC_ID_KERNEL) |
759 | bus_message_set_sender_driver(bus, m); | |
760 | else { | |
cb67f718 DM |
761 | snprintf(m->sender_buffer, sizeof(m->sender_buffer), ":1.%llu", (unsigned long long) k->src_id); |
762 | m->sender = m->creds.unique_name = m->sender_buffer; | |
763 | } | |
777d7a61 | 764 | |
cb67f718 DM |
765 | if (destination) |
766 | m->destination = destination; | |
767 | else if (k->dst_id == KDBUS_DST_ID_BROADCAST) | |
768 | m->destination = NULL; | |
769 | else if (k->dst_id == KDBUS_DST_ID_NAME) | |
770 | m->destination = bus->unique_name; /* fill in unique name if the well-known name is missing */ | |
771 | else { | |
772 | snprintf(m->destination_buffer, sizeof(m->destination_buffer), ":1.%llu", (unsigned long long) k->dst_id); | |
773 | m->destination = m->destination_buffer; | |
774 | } | |
777d7a61 | 775 | |
cb67f718 DM |
776 | /* We take possession of the kmsg struct now */ |
777 | m->kdbus = k; | |
778 | m->release_kdbus = true; | |
779 | m->free_fds = true; | |
780 | fds = NULL; | |
777d7a61 | 781 | |
cb67f718 | 782 | bus->rqueue[bus->rqueue_size++] = m; |
777d7a61 | 783 | |
cb67f718 | 784 | return 1; |
777d7a61 | 785 | |
cb67f718 | 786 | fail: |
125dd074 ZJS |
787 | unset_memfds(m); |
788 | sd_bus_message_unref(m); | |
777d7a61 | 789 | |
cb67f718 DM |
790 | return r; |
791 | } | |
777d7a61 | 792 | |
cb67f718 DM |
793 | int bus_kernel_take_fd(sd_bus *b) { |
794 | struct kdbus_cmd_hello *hello; | |
795 | struct kdbus_item *item; | |
5972fe95 LP |
796 | _cleanup_free_ char *g = NULL; |
797 | const char *name; | |
798 | size_t l = 0, m = 0, sz; | |
cb67f718 | 799 | int r; |
777d7a61 | 800 | |
cb67f718 | 801 | assert(b); |
7adc46fc | 802 | |
cb67f718 DM |
803 | if (b->is_server) |
804 | return -EINVAL; | |
777d7a61 | 805 | |
cb67f718 | 806 | b->use_memfd = 1; |
777d7a61 | 807 | |
455971c1 LP |
808 | if (b->description) { |
809 | g = bus_label_escape(b->description); | |
5972fe95 LP |
810 | if (!g) |
811 | return -ENOMEM; | |
812 | ||
813 | name = g; | |
814 | } else { | |
815 | char pr[17] = {}; | |
816 | ||
817 | /* If no name is explicitly set, we'll include a hint | |
818 | * indicating the library implementation, a hint which | |
819 | * kind of bus this is and the thread name */ | |
820 | ||
821 | assert_se(prctl(PR_GET_NAME, (unsigned long) pr) >= 0); | |
822 | ||
823 | if (isempty(pr)) { | |
824 | name = b->is_system ? "sd-system" : | |
825 | b->is_user ? "sd-user" : "sd"; | |
826 | } else { | |
827 | _cleanup_free_ char *e = NULL; | |
828 | ||
a6278b88 | 829 | e = bus_label_escape(pr); |
5972fe95 LP |
830 | if (!e) |
831 | return -ENOMEM; | |
832 | ||
833 | g = strappend(b->is_system ? "sd-system-" : | |
834 | b->is_user ? "sd-user-" : "sd-", | |
835 | e); | |
836 | if (!g) | |
837 | return -ENOMEM; | |
838 | ||
839 | name = g; | |
840 | } | |
841 | ||
455971c1 LP |
842 | b->description = bus_label_unescape(name); |
843 | if (!b->description) | |
5972fe95 LP |
844 | return -ENOMEM; |
845 | } | |
846 | ||
847 | m = strlen(name); | |
848 | ||
849 | sz = ALIGN8(offsetof(struct kdbus_cmd_hello, items)) + | |
850 | ALIGN8(offsetof(struct kdbus_item, str) + m + 1); | |
777d7a61 | 851 | |
cb67f718 | 852 | if (b->fake_creds_valid) |
5972fe95 | 853 | sz += ALIGN8(offsetof(struct kdbus_item, creds) + sizeof(struct kdbus_creds)); |
777d7a61 | 854 | |
705a415f LP |
855 | if (b->fake_pids_valid) |
856 | sz += ALIGN8(offsetof(struct kdbus_item, pids) + sizeof(struct kdbus_pids)); | |
857 | ||
cb67f718 DM |
858 | if (b->fake_label) { |
859 | l = strlen(b->fake_label); | |
860 | sz += ALIGN8(offsetof(struct kdbus_item, str) + l + 1); | |
861 | } | |
777d7a61 | 862 | |
7f3d3ba1 | 863 | hello = alloca0_align(sz, 8); |
cb67f718 | 864 | hello->size = sz; |
bc75205c | 865 | hello->flags = b->hello_flags; |
6f5c810a | 866 | hello->attach_flags_send = _KDBUS_ATTACH_ANY; |
d704fda9 | 867 | hello->attach_flags_recv = b->attach_flags; |
cb67f718 | 868 | hello->pool_size = KDBUS_POOL_SIZE; |
777d7a61 | 869 | |
cb67f718 DM |
870 | item = hello->items; |
871 | ||
5972fe95 | 872 | item->size = offsetof(struct kdbus_item, str) + m + 1; |
635f9f0d | 873 | item->type = KDBUS_ITEM_CONN_DESCRIPTION; |
5972fe95 LP |
874 | memcpy(item->str, name, m + 1); |
875 | item = KDBUS_ITEM_NEXT(item); | |
876 | ||
cb67f718 DM |
877 | if (b->fake_creds_valid) { |
878 | item->size = offsetof(struct kdbus_item, creds) + sizeof(struct kdbus_creds); | |
879 | item->type = KDBUS_ITEM_CREDS; | |
880 | item->creds = b->fake_creds; | |
881 | ||
882 | item = KDBUS_ITEM_NEXT(item); | |
777d7a61 LP |
883 | } |
884 | ||
705a415f LP |
885 | if (b->fake_pids_valid) { |
886 | item->size = offsetof(struct kdbus_item, pids) + sizeof(struct kdbus_pids); | |
887 | item->type = KDBUS_ITEM_PIDS; | |
888 | item->pids = b->fake_pids; | |
889 | ||
890 | item = KDBUS_ITEM_NEXT(item); | |
891 | } | |
892 | ||
cb67f718 DM |
893 | if (b->fake_label) { |
894 | item->size = offsetof(struct kdbus_item, str) + l + 1; | |
5972fe95 | 895 | item->type = KDBUS_ITEM_SECLABEL; |
cb67f718 | 896 | memcpy(item->str, b->fake_label, l+1); |
777d7a61 LP |
897 | } |
898 | ||
cb67f718 DM |
899 | r = ioctl(b->input_fd, KDBUS_CMD_HELLO, hello); |
900 | if (r < 0) | |
901 | return -errno; | |
777d7a61 | 902 | |
cb67f718 DM |
903 | if (!b->kdbus_buffer) { |
904 | b->kdbus_buffer = mmap(NULL, KDBUS_POOL_SIZE, PROT_READ, MAP_SHARED, b->input_fd, 0); | |
905 | if (b->kdbus_buffer == MAP_FAILED) { | |
906 | b->kdbus_buffer = NULL; | |
907 | return -errno; | |
908 | } | |
909 | } | |
6629161f | 910 | |
4a3e79e1 | 911 | /* The higher 32bit of the bus_flags fields are considered |
cb67f718 | 912 | * 'incompatible flags'. Refuse them all for now. */ |
4a3e79e1 | 913 | if (hello->bus_flags > 0xFFFFFFFFULL) |
cb67f718 | 914 | return -ENOTSUP; |
6629161f | 915 | |
b28ff39f | 916 | if (!bloom_validate_parameters((size_t) hello->bloom.size, (unsigned) hello->bloom.n_hash)) |
cb67f718 | 917 | return -ENOTSUP; |
6629161f | 918 | |
b28ff39f LP |
919 | b->bloom_size = (size_t) hello->bloom.size; |
920 | b->bloom_n_hash = (unsigned) hello->bloom.n_hash; | |
921 | ||
cb67f718 DM |
922 | if (asprintf(&b->unique_name, ":1.%llu", (unsigned long long) hello->id) < 0) |
923 | return -ENOMEM; | |
6629161f | 924 | |
cb67f718 | 925 | b->unique_id = hello->id; |
6629161f | 926 | |
cb67f718 DM |
927 | b->is_kernel = true; |
928 | b->bus_client = true; | |
bc75205c | 929 | b->can_fds = !!(hello->flags & KDBUS_HELLO_ACCEPT_FD); |
cb67f718 DM |
930 | b->message_version = 2; |
931 | b->message_endian = BUS_NATIVE_ENDIAN; | |
c91cb83c | 932 | |
cb67f718 DM |
933 | /* the kernel told us the UUID of the underlying bus */ |
934 | memcpy(b->server_id.bytes, hello->id128, sizeof(b->server_id.bytes)); | |
6629161f | 935 | |
cb67f718 DM |
936 | return bus_start_running(b); |
937 | } | |
6629161f | 938 | |
cb67f718 DM |
939 | int bus_kernel_connect(sd_bus *b) { |
940 | assert(b); | |
941 | assert(b->input_fd < 0); | |
942 | assert(b->output_fd < 0); | |
943 | assert(b->kernel); | |
1307c3ff | 944 | |
cb67f718 DM |
945 | if (b->is_server) |
946 | return -EINVAL; | |
1307c3ff | 947 | |
cb67f718 DM |
948 | b->input_fd = open(b->kernel, O_RDWR|O_NOCTTY|O_CLOEXEC); |
949 | if (b->input_fd < 0) | |
950 | return -errno; | |
6629161f | 951 | |
cb67f718 | 952 | b->output_fd = b->input_fd; |
6629161f | 953 | |
cb67f718 DM |
954 | return bus_kernel_take_fd(b); |
955 | } | |
f9be01f3 | 956 | |
52cfc037 LP |
957 | int bus_kernel_cmd_free(sd_bus *bus, uint64_t offset) { |
958 | struct kdbus_cmd_free cmd = { | |
959 | .flags = 0, | |
960 | .offset = offset, | |
961 | }; | |
962 | int r; | |
963 | ||
964 | assert(bus); | |
965 | assert(bus->is_kernel); | |
966 | ||
967 | r = ioctl(bus->input_fd, KDBUS_CMD_FREE, &cmd); | |
968 | if (r < 0) | |
969 | return -errno; | |
970 | ||
971 | return 0; | |
972 | } | |
973 | ||
069f5e61 | 974 | static void close_kdbus_msg(sd_bus *bus, struct kdbus_msg *k) { |
069f5e61 LP |
975 | struct kdbus_item *d; |
976 | ||
977 | assert(bus); | |
978 | assert(k); | |
979 | ||
069f5e61 | 980 | KDBUS_ITEM_FOREACH(d, k, items) { |
069f5e61 LP |
981 | if (d->type == KDBUS_ITEM_FDS) |
982 | close_many(d->fds, (d->size - offsetof(struct kdbus_item, fds)) / sizeof(int)); | |
983 | else if (d->type == KDBUS_ITEM_PAYLOAD_MEMFD) | |
03e334a1 | 984 | safe_close(d->memfd.fd); |
069f5e61 | 985 | } |
ca794c8e | 986 | |
52cfc037 | 987 | bus_kernel_cmd_free(bus, (uint8_t*) k - (uint8_t*) bus->kdbus_buffer); |
069f5e61 LP |
988 | } |
989 | ||
990 | int bus_kernel_write_message(sd_bus *bus, sd_bus_message *m, bool hint_sync_call) { | |
cb67f718 | 991 | int r; |
6629161f | 992 | |
cb67f718 DM |
993 | assert(bus); |
994 | assert(m); | |
995 | assert(bus->state == BUS_RUNNING); | |
6629161f | 996 | |
cb67f718 DM |
997 | /* If we can't deliver, we want room for the error message */ |
998 | r = bus_rqueue_make_room(bus); | |
6629161f LP |
999 | if (r < 0) |
1000 | return r; | |
1001 | ||
cb67f718 | 1002 | r = bus_message_setup_kmsg(bus, m); |
6629161f LP |
1003 | if (r < 0) |
1004 | return r; | |
1005 | ||
069f5e61 LP |
1006 | /* If this is a synchronous method call, then let's tell the |
1007 | * kernel, so that it can pass CPU time/scheduling to the | |
1008 | * destination for the time, if it wants to. If we | |
1009 | * synchronously wait for the result anyway, we won't need CPU | |
1010 | * anyway. */ | |
1011 | if (hint_sync_call) | |
1012 | m->kdbus->flags |= KDBUS_MSG_FLAGS_EXPECT_REPLY|KDBUS_MSG_FLAGS_SYNC_REPLY; | |
1013 | ||
cb67f718 DM |
1014 | r = ioctl(bus->output_fd, KDBUS_CMD_MSG_SEND, m->kdbus); |
1015 | if (r < 0) { | |
1016 | _cleanup_bus_error_free_ sd_bus_error error = SD_BUS_ERROR_NULL; | |
1017 | sd_bus_message *reply; | |
253ce82b | 1018 | |
cb67f718 DM |
1019 | if (errno == EAGAIN || errno == EINTR) |
1020 | return 0; | |
1021 | else if (errno == ENXIO || errno == ESRCH) { | |
6629161f | 1022 | |
cb67f718 DM |
1023 | /* ENXIO: unique name not known |
1024 | * ESRCH: well-known name not known */ | |
6629161f | 1025 | |
cb67f718 DM |
1026 | if (m->header->type == SD_BUS_MESSAGE_METHOD_CALL) |
1027 | sd_bus_error_setf(&error, SD_BUS_ERROR_SERVICE_UNKNOWN, "Destination %s not known", m->destination); | |
1028 | else { | |
1029 | log_debug("Could not deliver message to %s as destination is not known. Ignoring.", m->destination); | |
1030 | return 0; | |
1031 | } | |
777d7a61 | 1032 | |
cb67f718 | 1033 | } else if (errno == EADDRNOTAVAIL) { |
fd8d62d9 | 1034 | |
cb67f718 | 1035 | /* EADDRNOTAVAIL: activation is possible, but turned off in request flags */ |
bc7fd8cd | 1036 | |
cb67f718 DM |
1037 | if (m->header->type == SD_BUS_MESSAGE_METHOD_CALL) |
1038 | sd_bus_error_setf(&error, SD_BUS_ERROR_SERVICE_UNKNOWN, "Activation of %s not requested", m->destination); | |
1039 | else { | |
1040 | log_debug("Could not deliver message to %s as destination is not activated. Ignoring.", m->destination); | |
1041 | return 0; | |
1042 | } | |
1043 | } else | |
1044 | return -errno; | |
bc7fd8cd | 1045 | |
cb67f718 DM |
1046 | r = bus_message_new_synthetic_error( |
1047 | bus, | |
1048 | BUS_MESSAGE_COOKIE(m), | |
1049 | &error, | |
1050 | &reply); | |
bc7fd8cd | 1051 | |
cb67f718 DM |
1052 | if (r < 0) |
1053 | return r; | |
bc7fd8cd | 1054 | |
cb67f718 DM |
1055 | r = bus_seal_synthetic_message(bus, reply); |
1056 | if (r < 0) | |
1057 | return r; | |
62b3e928 | 1058 | |
cb67f718 | 1059 | bus->rqueue[bus->rqueue_size++] = reply; |
bc7fd8cd | 1060 | |
069f5e61 LP |
1061 | } else if (hint_sync_call) { |
1062 | struct kdbus_msg *k; | |
fd8d62d9 | 1063 | |
069f5e61 LP |
1064 | k = (struct kdbus_msg *)((uint8_t *)bus->kdbus_buffer + m->kdbus->offset_reply); |
1065 | assert(k); | |
777d7a61 | 1066 | |
069f5e61 | 1067 | if (k->payload_type == KDBUS_PAYLOAD_DBUS) { |
1307c3ff | 1068 | |
069f5e61 LP |
1069 | r = bus_kernel_make_message(bus, k); |
1070 | if (r < 0) { | |
1071 | close_kdbus_msg(bus, k); | |
1307c3ff | 1072 | |
069f5e61 LP |
1073 | /* Anybody can send us invalid messages, let's just drop them. */ |
1074 | if (r == -EBADMSG || r == -EPROTOTYPE) | |
da927ba9 | 1075 | log_debug_errno(r, "Ignoring invalid message: %m"); |
069f5e61 LP |
1076 | else |
1077 | return r; | |
1078 | } | |
1079 | } else { | |
1080 | log_debug("Ignoring message with unknown payload type %llu.", (unsigned long long) k->payload_type); | |
1081 | close_kdbus_msg(bus, k); | |
1082 | } | |
cb67f718 | 1083 | } |
069f5e61 LP |
1084 | |
1085 | return 1; | |
cb67f718 | 1086 | } |
69aec65c | 1087 | |
cb67f718 DM |
1088 | static int push_name_owner_changed(sd_bus *bus, const char *name, const char *old_owner, const char *new_owner) { |
1089 | _cleanup_bus_message_unref_ sd_bus_message *m = NULL; | |
1090 | int r; | |
2dc9970b | 1091 | |
cb67f718 | 1092 | assert(bus); |
2dc9970b | 1093 | |
cb67f718 DM |
1094 | r = sd_bus_message_new_signal( |
1095 | bus, | |
151b9b96 | 1096 | &m, |
cb67f718 DM |
1097 | "/org/freedesktop/DBus", |
1098 | "org.freedesktop.DBus", | |
151b9b96 | 1099 | "NameOwnerChanged"); |
cb67f718 DM |
1100 | if (r < 0) |
1101 | return r; | |
2dc9970b | 1102 | |
cb67f718 DM |
1103 | r = sd_bus_message_append(m, "sss", name, old_owner, new_owner); |
1104 | if (r < 0) | |
1105 | return r; | |
5b12334d | 1106 | |
7d31d924 | 1107 | bus_message_set_sender_driver(bus, m); |
5b12334d | 1108 | |
cb67f718 DM |
1109 | r = bus_seal_synthetic_message(bus, m); |
1110 | if (r < 0) | |
1111 | return r; | |
5b12334d | 1112 | |
cb67f718 DM |
1113 | bus->rqueue[bus->rqueue_size++] = m; |
1114 | m = NULL; | |
5b12334d | 1115 | |
cb67f718 DM |
1116 | return 1; |
1117 | } | |
5b12334d | 1118 | |
cb67f718 DM |
1119 | static int translate_name_change(sd_bus *bus, struct kdbus_msg *k, struct kdbus_item *d) { |
1120 | char new_owner[UNIQUE_NAME_MAX], old_owner[UNIQUE_NAME_MAX]; | |
5b12334d | 1121 | |
cb67f718 DM |
1122 | assert(bus); |
1123 | assert(k); | |
1124 | assert(d); | |
751bc6ac | 1125 | |
619d7a03 | 1126 | if (d->type == KDBUS_ITEM_NAME_ADD || (d->name_change.old_id.flags & (KDBUS_NAME_IN_QUEUE|KDBUS_NAME_ACTIVATOR))) |
cb67f718 DM |
1127 | old_owner[0] = 0; |
1128 | else | |
619d7a03 | 1129 | sprintf(old_owner, ":1.%llu", (unsigned long long) d->name_change.old_id.id); |
751bc6ac | 1130 | |
619d7a03 | 1131 | if (d->type == KDBUS_ITEM_NAME_REMOVE || (d->name_change.new_id.flags & (KDBUS_NAME_IN_QUEUE|KDBUS_NAME_ACTIVATOR))) { |
751bc6ac | 1132 | |
cb67f718 DM |
1133 | if (isempty(old_owner)) |
1134 | return 0; | |
5b12334d | 1135 | |
cb67f718 DM |
1136 | new_owner[0] = 0; |
1137 | } else | |
619d7a03 | 1138 | sprintf(new_owner, ":1.%llu", (unsigned long long) d->name_change.new_id.id); |
5b12334d | 1139 | |
cb67f718 DM |
1140 | return push_name_owner_changed(bus, d->name_change.name, old_owner, new_owner); |
1141 | } | |
5b12334d | 1142 | |
cb67f718 DM |
1143 | static int translate_id_change(sd_bus *bus, struct kdbus_msg *k, struct kdbus_item *d) { |
1144 | char owner[UNIQUE_NAME_MAX]; | |
2e2ec0ea | 1145 | |
cb67f718 DM |
1146 | assert(bus); |
1147 | assert(k); | |
1148 | assert(d); | |
777d7a61 | 1149 | |
cb67f718 | 1150 | sprintf(owner, ":1.%llu", d->id_change.id); |
2e2ec0ea | 1151 | |
cb67f718 DM |
1152 | return push_name_owner_changed( |
1153 | bus, owner, | |
1154 | d->type == KDBUS_ITEM_ID_ADD ? NULL : owner, | |
1155 | d->type == KDBUS_ITEM_ID_ADD ? owner : NULL); | |
1156 | } | |
49b832c5 | 1157 | |
cb67f718 DM |
1158 | static int translate_reply(sd_bus *bus, struct kdbus_msg *k, struct kdbus_item *d) { |
1159 | _cleanup_bus_message_unref_ sd_bus_message *m = NULL; | |
1160 | int r; | |
777d7a61 | 1161 | |
cb67f718 DM |
1162 | assert(bus); |
1163 | assert(k); | |
1164 | assert(d); | |
acb5a3cb | 1165 | |
cb67f718 DM |
1166 | r = bus_message_new_synthetic_error( |
1167 | bus, | |
1168 | k->cookie_reply, | |
1169 | d->type == KDBUS_ITEM_REPLY_TIMEOUT ? | |
1170 | &SD_BUS_ERROR_MAKE_CONST(SD_BUS_ERROR_NO_REPLY, "Method call timed out") : | |
1171 | &SD_BUS_ERROR_MAKE_CONST(SD_BUS_ERROR_NO_REPLY, "Method call peer died"), | |
1172 | &m); | |
1307c3ff | 1173 | if (r < 0) |
cb67f718 | 1174 | return r; |
51038c03 | 1175 | |
7d31d924 | 1176 | bus_message_set_sender_driver(bus, m); |
51038c03 | 1177 | |
cb67f718 DM |
1178 | r = bus_seal_synthetic_message(bus, m); |
1179 | if (r < 0) | |
1180 | return r; | |
6629161f | 1181 | |
7adc46fc | 1182 | bus->rqueue[bus->rqueue_size++] = m; |
cb67f718 | 1183 | m = NULL; |
7d22c717 | 1184 | |
6629161f | 1185 | return 1; |
cb67f718 | 1186 | } |
1307c3ff | 1187 | |
cb67f718 DM |
1188 | static int bus_kernel_translate_message(sd_bus *bus, struct kdbus_msg *k) { |
1189 | struct kdbus_item *d, *found = NULL; | |
1307c3ff | 1190 | |
cb67f718 DM |
1191 | static int (* const translate[])(sd_bus *bus, struct kdbus_msg *k, struct kdbus_item *d) = { |
1192 | [KDBUS_ITEM_NAME_ADD - _KDBUS_ITEM_KERNEL_BASE] = translate_name_change, | |
1193 | [KDBUS_ITEM_NAME_REMOVE - _KDBUS_ITEM_KERNEL_BASE] = translate_name_change, | |
1194 | [KDBUS_ITEM_NAME_CHANGE - _KDBUS_ITEM_KERNEL_BASE] = translate_name_change, | |
1307c3ff | 1195 | |
cb67f718 DM |
1196 | [KDBUS_ITEM_ID_ADD - _KDBUS_ITEM_KERNEL_BASE] = translate_id_change, |
1197 | [KDBUS_ITEM_ID_REMOVE - _KDBUS_ITEM_KERNEL_BASE] = translate_id_change, | |
1198 | ||
1199 | [KDBUS_ITEM_REPLY_TIMEOUT - _KDBUS_ITEM_KERNEL_BASE] = translate_reply, | |
1200 | [KDBUS_ITEM_REPLY_DEAD - _KDBUS_ITEM_KERNEL_BASE] = translate_reply, | |
1201 | }; | |
1202 | ||
1203 | assert(bus); | |
1204 | assert(k); | |
1205 | assert(k->payload_type == KDBUS_PAYLOAD_KERNEL); | |
1206 | ||
1207 | KDBUS_ITEM_FOREACH(d, k, items) { | |
1208 | if (d->type >= _KDBUS_ITEM_KERNEL_BASE && d->type < _KDBUS_ITEM_KERNEL_BASE + ELEMENTSOF(translate)) { | |
1209 | if (found) | |
1210 | return -EBADMSG; | |
1211 | found = d; | |
1212 | } else | |
1213 | log_debug("Got unknown field from kernel %llu", d->type); | |
1307c3ff LP |
1214 | } |
1215 | ||
cb67f718 DM |
1216 | if (!found) { |
1217 | log_debug("Didn't find a kernel message to translate."); | |
1218 | return 0; | |
1219 | } | |
1220 | ||
1221 | return translate[found->type - _KDBUS_ITEM_KERNEL_BASE](bus, k, found); | |
6629161f LP |
1222 | } |
1223 | ||
766c5809 | 1224 | int bus_kernel_read_message(sd_bus *bus, bool hint_priority, int64_t priority) { |
9ff1897b | 1225 | struct kdbus_cmd_recv recv = {}; |
6629161f | 1226 | struct kdbus_msg *k; |
6629161f LP |
1227 | int r; |
1228 | ||
1229 | assert(bus); | |
7d22c717 | 1230 | |
7adc46fc | 1231 | r = bus_rqueue_make_room(bus); |
7d22c717 LP |
1232 | if (r < 0) |
1233 | return r; | |
6629161f | 1234 | |
766c5809 LP |
1235 | if (hint_priority) { |
1236 | recv.flags |= KDBUS_RECV_USE_PRIORITY; | |
1237 | recv.priority = priority; | |
1238 | } | |
1239 | ||
9ff1897b | 1240 | r = ioctl(bus->input_fd, KDBUS_CMD_MSG_RECV, &recv); |
fd8d62d9 | 1241 | if (r < 0) { |
6629161f LP |
1242 | if (errno == EAGAIN) |
1243 | return 0; | |
1244 | ||
f9a458c6 LP |
1245 | if (errno == EOVERFLOW) { |
1246 | log_debug("%s: kdbus reports %" PRIu64 " dropped broadcast messages, ignoring.", strna(bus->description), (uint64_t) recv.dropped_msgs); | |
1247 | return 0; | |
1248 | } | |
1249 | ||
fd8d62d9 | 1250 | return -errno; |
6629161f LP |
1251 | } |
1252 | ||
069f5e61 | 1253 | k = (struct kdbus_msg *)((uint8_t *)bus->kdbus_buffer + recv.offset); |
e1d337d4 | 1254 | if (k->payload_type == KDBUS_PAYLOAD_DBUS) { |
7d22c717 | 1255 | r = bus_kernel_make_message(bus, k); |
e1d337d4 LP |
1256 | |
1257 | /* Anybody can send us invalid messages, let's just drop them. */ | |
1258 | if (r == -EBADMSG || r == -EPROTOTYPE) { | |
da927ba9 | 1259 | log_debug_errno(r, "Ignoring invalid message: %m"); |
e1d337d4 LP |
1260 | r = 0; |
1261 | } | |
1262 | ||
1263 | } else if (k->payload_type == KDBUS_PAYLOAD_KERNEL) | |
7d22c717 | 1264 | r = bus_kernel_translate_message(bus, k); |
069f5e61 LP |
1265 | else { |
1266 | log_debug("Ignoring message with unknown payload type %llu.", (unsigned long long) k->payload_type); | |
777d7a61 | 1267 | r = 0; |
069f5e61 | 1268 | } |
777d7a61 | 1269 | |
fd8d62d9 LP |
1270 | if (r <= 0) |
1271 | close_kdbus_msg(bus, k); | |
6629161f | 1272 | |
51038c03 | 1273 | return r < 0 ? r : 1; |
6629161f LP |
1274 | } |
1275 | ||
8e959fbf | 1276 | int bus_kernel_pop_memfd(sd_bus *bus, void **address, size_t *mapped, size_t *allocated) { |
bc7fd8cd | 1277 | struct memfd_cache *c; |
45fbe937 | 1278 | int fd; |
bc7fd8cd LP |
1279 | |
1280 | assert(address); | |
8e959fbf LP |
1281 | assert(mapped); |
1282 | assert(allocated); | |
35460afc LP |
1283 | |
1284 | if (!bus || !bus->is_kernel) | |
1285 | return -ENOTSUP; | |
bc7fd8cd | 1286 | |
76b7742c | 1287 | assert_se(pthread_mutex_lock(&bus->memfd_cache_mutex) >= 0); |
45fbe937 | 1288 | |
bc7fd8cd | 1289 | if (bus->n_memfd_cache <= 0) { |
45fbe937 LP |
1290 | int r; |
1291 | ||
76b7742c | 1292 | assert_se(pthread_mutex_unlock(&bus->memfd_cache_mutex) >= 0); |
bc7fd8cd | 1293 | |
455971c1 | 1294 | r = memfd_new(bus->description); |
9b05bc48 | 1295 | if (r < 0) |
73843b52 | 1296 | return r; |
bc7fd8cd LP |
1297 | |
1298 | *address = NULL; | |
8e959fbf LP |
1299 | *mapped = 0; |
1300 | *allocated = 0; | |
a6082d77 | 1301 | return r; |
bc7fd8cd LP |
1302 | } |
1303 | ||
bf30e48f | 1304 | c = &bus->memfd_cache[--bus->n_memfd_cache]; |
bc7fd8cd LP |
1305 | |
1306 | assert(c->fd >= 0); | |
8e959fbf | 1307 | assert(c->mapped == 0 || c->address); |
bc7fd8cd LP |
1308 | |
1309 | *address = c->address; | |
8e959fbf LP |
1310 | *mapped = c->mapped; |
1311 | *allocated = c->allocated; | |
45fbe937 LP |
1312 | fd = c->fd; |
1313 | ||
76b7742c | 1314 | assert_se(pthread_mutex_unlock(&bus->memfd_cache_mutex) >= 0); |
bc7fd8cd | 1315 | |
45fbe937 LP |
1316 | return fd; |
1317 | } | |
1318 | ||
1319 | static void close_and_munmap(int fd, void *address, size_t size) { | |
1320 | if (size > 0) | |
76b7742c | 1321 | assert_se(munmap(address, PAGE_ALIGN(size)) >= 0); |
45fbe937 | 1322 | |
03e334a1 | 1323 | safe_close(fd); |
bc7fd8cd LP |
1324 | } |
1325 | ||
8e959fbf | 1326 | void bus_kernel_push_memfd(sd_bus *bus, int fd, void *address, size_t mapped, size_t allocated) { |
bc7fd8cd | 1327 | struct memfd_cache *c; |
8e959fbf | 1328 | uint64_t max_mapped = PAGE_ALIGN(MEMFD_CACHE_ITEM_SIZE_MAX); |
bc7fd8cd LP |
1329 | |
1330 | assert(fd >= 0); | |
8e959fbf | 1331 | assert(mapped == 0 || address); |
bc7fd8cd | 1332 | |
45fbe937 | 1333 | if (!bus || !bus->is_kernel) { |
8e959fbf | 1334 | close_and_munmap(fd, address, mapped); |
45fbe937 LP |
1335 | return; |
1336 | } | |
1337 | ||
76b7742c | 1338 | assert_se(pthread_mutex_lock(&bus->memfd_cache_mutex) >= 0); |
bc7fd8cd | 1339 | |
45fbe937 | 1340 | if (bus->n_memfd_cache >= ELEMENTSOF(bus->memfd_cache)) { |
76b7742c | 1341 | assert_se(pthread_mutex_unlock(&bus->memfd_cache_mutex) >= 0); |
bc7fd8cd | 1342 | |
8e959fbf | 1343 | close_and_munmap(fd, address, mapped); |
bc7fd8cd LP |
1344 | return; |
1345 | } | |
1346 | ||
1347 | c = &bus->memfd_cache[bus->n_memfd_cache++]; | |
1348 | c->fd = fd; | |
1349 | c->address = address; | |
1350 | ||
1351 | /* If overly long, let's return a bit to the OS */ | |
8e959fbf | 1352 | if (mapped > max_mapped) { |
73843b52 | 1353 | assert_se(memfd_set_size(fd, max_mapped) >= 0); |
8e959fbf LP |
1354 | assert_se(munmap((uint8_t*) address + max_mapped, PAGE_ALIGN(mapped - max_mapped)) >= 0); |
1355 | c->mapped = c->allocated = max_mapped; | |
1356 | } else { | |
1357 | c->mapped = mapped; | |
1358 | c->allocated = allocated; | |
1359 | } | |
45fbe937 | 1360 | |
76b7742c | 1361 | assert_se(pthread_mutex_unlock(&bus->memfd_cache_mutex) >= 0); |
bc7fd8cd LP |
1362 | } |
1363 | ||
1364 | void bus_kernel_flush_memfd(sd_bus *b) { | |
1365 | unsigned i; | |
1366 | ||
1367 | assert(b); | |
1368 | ||
76b7742c | 1369 | for (i = 0; i < b->n_memfd_cache; i++) |
8e959fbf | 1370 | close_and_munmap(b->memfd_cache[i].fd, b->memfd_cache[i].address, b->memfd_cache[i].mapped); |
bc7fd8cd | 1371 | } |
0253ddcc | 1372 | |
b5dae4c7 | 1373 | uint64_t request_name_flags_to_kdbus(uint64_t flags) { |
e3dd987c | 1374 | uint64_t f = 0; |
0253ddcc | 1375 | |
e3dd987c LP |
1376 | if (flags & SD_BUS_NAME_ALLOW_REPLACEMENT) |
1377 | f |= KDBUS_NAME_ALLOW_REPLACEMENT; | |
0253ddcc | 1378 | |
e3dd987c LP |
1379 | if (flags & SD_BUS_NAME_REPLACE_EXISTING) |
1380 | f |= KDBUS_NAME_REPLACE_EXISTING; | |
0253ddcc | 1381 | |
d90bb669 | 1382 | if (flags & SD_BUS_NAME_QUEUE) |
e3dd987c | 1383 | f |= KDBUS_NAME_QUEUE; |
0253ddcc | 1384 | |
b5dae4c7 | 1385 | return f; |
e3dd987c LP |
1386 | } |
1387 | ||
b5dae4c7 | 1388 | uint64_t attach_flags_to_kdbus(uint64_t mask) { |
e3dd987c LP |
1389 | uint64_t m = 0; |
1390 | ||
705a415f LP |
1391 | if (mask & (SD_BUS_CREDS_UID|SD_BUS_CREDS_EUID|SD_BUS_CREDS_SUID|SD_BUS_CREDS_FSUID| |
1392 | SD_BUS_CREDS_GID|SD_BUS_CREDS_EGID|SD_BUS_CREDS_SGID|SD_BUS_CREDS_FSGID)) | |
e3dd987c LP |
1393 | m |= KDBUS_ATTACH_CREDS; |
1394 | ||
705a415f LP |
1395 | if (mask & (SD_BUS_CREDS_PID|SD_BUS_CREDS_PID_STARTTIME|SD_BUS_CREDS_TID)) |
1396 | m |= KDBUS_ATTACH_PIDS; | |
1397 | ||
a2243d54 DM |
1398 | if (mask & SD_BUS_CREDS_COMM) |
1399 | m |= KDBUS_ATTACH_PID_COMM; | |
1400 | ||
1401 | if (mask & SD_BUS_CREDS_TID_COMM) | |
1402 | m |= KDBUS_ATTACH_TID_COMM; | |
e3dd987c LP |
1403 | |
1404 | if (mask & SD_BUS_CREDS_EXE) | |
1405 | m |= KDBUS_ATTACH_EXE; | |
1406 | ||
1407 | if (mask & SD_BUS_CREDS_CMDLINE) | |
1408 | m |= KDBUS_ATTACH_CMDLINE; | |
1409 | ||
1410 | if (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)) | |
1411 | m |= KDBUS_ATTACH_CGROUP; | |
1412 | ||
1413 | if (mask & (SD_BUS_CREDS_EFFECTIVE_CAPS|SD_BUS_CREDS_PERMITTED_CAPS|SD_BUS_CREDS_INHERITABLE_CAPS|SD_BUS_CREDS_BOUNDING_CAPS)) | |
1414 | m |= KDBUS_ATTACH_CAPS; | |
1415 | ||
1416 | if (mask & SD_BUS_CREDS_SELINUX_CONTEXT) | |
1417 | m |= KDBUS_ATTACH_SECLABEL; | |
0253ddcc | 1418 | |
e3dd987c LP |
1419 | if (mask & (SD_BUS_CREDS_AUDIT_SESSION_ID|SD_BUS_CREDS_AUDIT_LOGIN_UID)) |
1420 | m |= KDBUS_ATTACH_AUDIT; | |
1421 | ||
49b832c5 LP |
1422 | if (mask & SD_BUS_CREDS_WELL_KNOWN_NAMES) |
1423 | m |= KDBUS_ATTACH_NAMES; | |
1424 | ||
455971c1 | 1425 | if (mask & SD_BUS_CREDS_DESCRIPTION) |
635f9f0d | 1426 | m |= KDBUS_ATTACH_CONN_DESCRIPTION; |
cccb0b2c | 1427 | |
02581590 LP |
1428 | if (mask & SD_BUS_CREDS_SUPPLEMENTARY_GIDS) |
1429 | m |= KDBUS_ATTACH_AUXGROUPS; | |
1430 | ||
b5dae4c7 | 1431 | return m; |
0253ddcc | 1432 | } |
e3dd987c | 1433 | |
f2769777 | 1434 | int bus_kernel_create_bus(const char *name, bool world, char **s) { |
816a3f9e | 1435 | struct kdbus_cmd_make *make; |
e3dd987c | 1436 | struct kdbus_item *n; |
fa7796e9 | 1437 | size_t l; |
e3dd987c LP |
1438 | int fd; |
1439 | ||
1440 | assert(name); | |
1441 | assert(s); | |
1442 | ||
63cc4c31 | 1443 | fd = open("/sys/fs/kdbus/control", O_RDWR|O_NOCTTY|O_CLOEXEC); |
e3dd987c LP |
1444 | if (fd < 0) |
1445 | return -errno; | |
1446 | ||
fa7796e9 LP |
1447 | l = strlen(name); |
1448 | make = alloca0_align(offsetof(struct kdbus_cmd_make, items) + | |
1449 | ALIGN8(offsetof(struct kdbus_item, bloom_parameter) + sizeof(struct kdbus_bloom_parameter)) + | |
1450 | ALIGN8(offsetof(struct kdbus_item, data64) + sizeof(uint64_t)) + | |
1451 | ALIGN8(offsetof(struct kdbus_item, str) + DECIMAL_STR_MAX(uid_t) + 1 + l + 1), | |
7f3d3ba1 | 1452 | 8); |
e3dd987c | 1453 | |
816a3f9e DM |
1454 | make->size = offsetof(struct kdbus_cmd_make, items); |
1455 | ||
fa7796e9 | 1456 | /* Set the bloom parameters */ |
e3dd987c | 1457 | n = make->items; |
18a28147 KS |
1458 | n->size = offsetof(struct kdbus_item, bloom_parameter) + |
1459 | sizeof(struct kdbus_bloom_parameter); | |
1460 | n->type = KDBUS_ITEM_BLOOM_PARAMETER; | |
b28ff39f LP |
1461 | n->bloom_parameter.size = DEFAULT_BLOOM_SIZE; |
1462 | n->bloom_parameter.n_hash = DEFAULT_BLOOM_N_HASH; | |
1463 | ||
1464 | assert_cc(DEFAULT_BLOOM_SIZE > 0); | |
1465 | assert_cc(DEFAULT_BLOOM_N_HASH > 0); | |
1466 | ||
816a3f9e DM |
1467 | make->size += ALIGN8(n->size); |
1468 | ||
fa7796e9 LP |
1469 | /* The busses we create make no restrictions on what metadata |
1470 | * peers can read from incoming messages. */ | |
1471 | n = KDBUS_ITEM_NEXT(n); | |
1472 | n->type = KDBUS_ITEM_ATTACH_FLAGS_RECV; | |
1473 | n->size = offsetof(struct kdbus_item, data64) + sizeof(uint64_t); | |
1474 | n->data64[0] = _KDBUS_ATTACH_ANY; | |
1475 | make->size += ALIGN8(n->size); | |
1476 | ||
1477 | /* Set the a good name */ | |
816a3f9e | 1478 | n = KDBUS_ITEM_NEXT(n); |
a4152e3f | 1479 | sprintf(n->str, UID_FMT "-%s", getuid(), name); |
e3dd987c | 1480 | n->size = offsetof(struct kdbus_item, str) + strlen(n->str) + 1; |
5e16c257 | 1481 | n->type = KDBUS_ITEM_MAKE_NAME; |
816a3f9e | 1482 | make->size += ALIGN8(n->size); |
e3dd987c | 1483 | |
f7c7cd03 | 1484 | make->flags = world ? KDBUS_MAKE_ACCESS_WORLD : 0; |
e3dd987c LP |
1485 | |
1486 | if (ioctl(fd, KDBUS_CMD_BUS_MAKE, make) < 0) { | |
03e334a1 | 1487 | safe_close(fd); |
e3dd987c LP |
1488 | return -errno; |
1489 | } | |
1490 | ||
1491 | if (s) { | |
1492 | char *p; | |
1493 | ||
63cc4c31 | 1494 | p = strjoin("/sys/fs/kdbus/", n->str, "/bus", NULL); |
e3dd987c | 1495 | if (!p) { |
03e334a1 | 1496 | safe_close(fd); |
e3dd987c LP |
1497 | return -ENOMEM; |
1498 | } | |
1499 | ||
1500 | *s = p; | |
1501 | } | |
1502 | ||
1503 | return fd; | |
1504 | } | |
9bd37b40 | 1505 | |
5369c77d | 1506 | static int bus_kernel_translate_access(BusPolicyAccess access) { |
a4152e3f | 1507 | assert(access >= 0); |
5369c77d | 1508 | assert(access < _BUS_POLICY_ACCESS_MAX); |
a4152e3f LP |
1509 | |
1510 | switch (access) { | |
1511 | ||
5369c77d | 1512 | case BUS_POLICY_ACCESS_SEE: |
a4152e3f LP |
1513 | return KDBUS_POLICY_SEE; |
1514 | ||
5369c77d | 1515 | case BUS_POLICY_ACCESS_TALK: |
a4152e3f LP |
1516 | return KDBUS_POLICY_TALK; |
1517 | ||
5369c77d | 1518 | case BUS_POLICY_ACCESS_OWN: |
a4152e3f LP |
1519 | return KDBUS_POLICY_OWN; |
1520 | ||
1521 | default: | |
1522 | assert_not_reached("Unknown policy access"); | |
1523 | } | |
1524 | } | |
1525 | ||
1526 | static int bus_kernel_translate_policy(const BusNamePolicy *policy, struct kdbus_item *item) { | |
1527 | int r; | |
09365592 LP |
1528 | |
1529 | assert(policy); | |
1530 | assert(item); | |
1531 | ||
1683342a | 1532 | switch (policy->type) { |
09365592 | 1533 | |
a4152e3f LP |
1534 | case BUSNAME_POLICY_TYPE_USER: { |
1535 | const char *user = policy->name; | |
1536 | uid_t uid; | |
1537 | ||
1538 | r = get_user_creds(&user, &uid, NULL, NULL, NULL); | |
1539 | if (r < 0) | |
1540 | return r; | |
1541 | ||
1683342a | 1542 | item->policy_access.type = KDBUS_POLICY_ACCESS_USER; |
a4152e3f | 1543 | item->policy_access.id = uid; |
1683342a | 1544 | break; |
a4152e3f | 1545 | } |
1683342a | 1546 | |
a4152e3f LP |
1547 | case BUSNAME_POLICY_TYPE_GROUP: { |
1548 | const char *group = policy->name; | |
1549 | gid_t gid; | |
1683342a | 1550 | |
a4152e3f LP |
1551 | r = get_group_creds(&group, &gid); |
1552 | if (r < 0) | |
1553 | return r; | |
1554 | ||
1555 | item->policy_access.type = KDBUS_POLICY_ACCESS_GROUP; | |
1556 | item->policy_access.id = gid; | |
1683342a | 1557 | break; |
a4152e3f | 1558 | } |
1683342a DM |
1559 | |
1560 | default: | |
1561 | assert_not_reached("Unknown policy type"); | |
1562 | } | |
1563 | ||
a4152e3f | 1564 | item->policy_access.access = bus_kernel_translate_access(policy->access); |
09365592 | 1565 | |
a4152e3f LP |
1566 | return 0; |
1567 | } | |
1683342a | 1568 | |
8f077bf9 | 1569 | int bus_kernel_open_bus_fd(const char *bus, char **path) { |
a4152e3f LP |
1570 | char *p; |
1571 | int fd; | |
8f077bf9 | 1572 | size_t len; |
1683342a | 1573 | |
8aee3fc7 LP |
1574 | assert(bus); |
1575 | ||
63cc4c31 | 1576 | len = strlen("/sys/fs/kdbus/") + DECIMAL_STR_MAX(uid_t) + 1 + strlen(bus) + strlen("/bus") + 1; |
8f077bf9 ZJS |
1577 | |
1578 | if (path) { | |
8aee3fc7 | 1579 | p = new(char, len); |
8f077bf9 ZJS |
1580 | if (!p) |
1581 | return -ENOMEM; | |
8f077bf9 | 1582 | } else |
8aee3fc7 LP |
1583 | p = newa(char, len); |
1584 | ||
63cc4c31 | 1585 | sprintf(p, "/sys/fs/kdbus/" UID_FMT "-%s/bus", getuid(), bus); |
1683342a | 1586 | |
a4152e3f | 1587 | fd = open(p, O_RDWR|O_NOCTTY|O_CLOEXEC); |
8aee3fc7 LP |
1588 | if (fd < 0) { |
1589 | if (path) | |
1590 | free(p); | |
1591 | ||
a4152e3f | 1592 | return -errno; |
8aee3fc7 LP |
1593 | } |
1594 | ||
1595 | if (path) | |
1596 | *path = p; | |
a4152e3f LP |
1597 | |
1598 | return fd; | |
1683342a DM |
1599 | } |
1600 | ||
e7d718af | 1601 | int bus_kernel_create_endpoint(const char *bus_name, const char *ep_name, char **ep_path) { |
8e00bfc2 | 1602 | _cleanup_free_ char *path = NULL; |
e7d718af DM |
1603 | struct kdbus_cmd_make *make; |
1604 | struct kdbus_item *n; | |
342f3005 | 1605 | const char *name; |
e7d718af DM |
1606 | int fd; |
1607 | ||
1608 | fd = bus_kernel_open_bus_fd(bus_name, &path); | |
1609 | if (fd < 0) | |
1610 | return fd; | |
1611 | ||
342f3005 DH |
1612 | make = alloca0_align(ALIGN8(offsetof(struct kdbus_cmd_make, items)) + |
1613 | ALIGN8(offsetof(struct kdbus_item, str) + DECIMAL_STR_MAX(uid_t) + 1 + strlen(ep_name) + 1), | |
1614 | 8); | |
1615 | make->size = ALIGN8(offsetof(struct kdbus_cmd_make, items)); | |
e7d718af DM |
1616 | make->flags = KDBUS_MAKE_ACCESS_WORLD; |
1617 | ||
1618 | n = make->items; | |
342f3005 DH |
1619 | sprintf(n->str, UID_FMT "-%s", getuid(), ep_name); |
1620 | n->size = offsetof(struct kdbus_item, str) + strlen(n->str) + 1; | |
e7d718af | 1621 | n->type = KDBUS_ITEM_MAKE_NAME; |
342f3005 DH |
1622 | make->size += ALIGN8(n->size); |
1623 | name = n->str; | |
e7d718af | 1624 | |
40885bb2 | 1625 | if (ioctl(fd, KDBUS_CMD_ENDPOINT_MAKE, make) < 0) { |
e7d718af DM |
1626 | safe_close(fd); |
1627 | return -errno; | |
1628 | } | |
1629 | ||
e7d718af | 1630 | if (ep_path) { |
2c652b6b LP |
1631 | char *p; |
1632 | ||
342f3005 | 1633 | p = strjoin(dirname(path), "/", name, NULL); |
2c652b6b | 1634 | if (!p) { |
4edf33d1 | 1635 | safe_close(fd); |
e7d718af | 1636 | return -ENOMEM; |
4edf33d1 | 1637 | } |
2c652b6b LP |
1638 | |
1639 | *ep_path = p; | |
e7d718af DM |
1640 | } |
1641 | ||
1642 | return fd; | |
1643 | } | |
1644 | ||
1645 | int bus_kernel_set_endpoint_policy(int fd, uid_t uid, BusEndpoint *ep) { | |
1646 | ||
1647 | struct kdbus_cmd_update *update; | |
1648 | struct kdbus_item *n; | |
1649 | BusEndpointPolicy *po; | |
1650 | Iterator i; | |
1651 | size_t size; | |
1652 | int r; | |
1653 | ||
1654 | size = ALIGN8(offsetof(struct kdbus_cmd_update, items)); | |
1655 | ||
1656 | HASHMAP_FOREACH(po, ep->policy_hash, i) { | |
1657 | size += ALIGN8(offsetof(struct kdbus_item, str) + strlen(po->name) + 1); | |
1658 | size += ALIGN8(offsetof(struct kdbus_item, policy_access) + sizeof(struct kdbus_policy_access)); | |
1659 | } | |
1660 | ||
7f3d3ba1 | 1661 | update = alloca0_align(size, 8); |
e7d718af DM |
1662 | update->size = size; |
1663 | ||
1664 | n = update->items; | |
1665 | ||
1666 | HASHMAP_FOREACH(po, ep->policy_hash, i) { | |
1667 | n->type = KDBUS_ITEM_NAME; | |
1668 | n->size = offsetof(struct kdbus_item, str) + strlen(po->name) + 1; | |
1669 | strcpy(n->str, po->name); | |
1670 | n = KDBUS_ITEM_NEXT(n); | |
1671 | ||
1672 | n->type = KDBUS_ITEM_POLICY_ACCESS; | |
1673 | n->size = offsetof(struct kdbus_item, policy_access) + sizeof(struct kdbus_policy_access); | |
1674 | ||
1675 | n->policy_access.type = KDBUS_POLICY_ACCESS_USER; | |
1676 | n->policy_access.access = bus_kernel_translate_access(po->access); | |
1677 | n->policy_access.id = uid; | |
1678 | ||
1679 | n = KDBUS_ITEM_NEXT(n); | |
1680 | } | |
1681 | ||
40885bb2 | 1682 | r = ioctl(fd, KDBUS_CMD_ENDPOINT_UPDATE, update); |
e7d718af DM |
1683 | if (r < 0) |
1684 | return -errno; | |
1685 | ||
1686 | return 0; | |
1687 | } | |
1688 | ||
a4152e3f LP |
1689 | int bus_kernel_make_starter( |
1690 | int fd, | |
1691 | const char *name, | |
1692 | bool activating, | |
1693 | bool accept_fd, | |
1694 | BusNamePolicy *policy, | |
5369c77d | 1695 | BusPolicyAccess world_policy) { |
a4152e3f | 1696 | |
e821075a LP |
1697 | struct kdbus_cmd_hello *hello; |
1698 | struct kdbus_item *n; | |
1683342a DM |
1699 | size_t policy_cnt = 0; |
1700 | BusNamePolicy *po; | |
1701 | size_t size; | |
a4152e3f | 1702 | int r; |
e821075a | 1703 | |
a4152e3f | 1704 | assert(fd >= 0); |
e821075a LP |
1705 | assert(name); |
1706 | ||
1683342a DM |
1707 | LIST_FOREACH(policy, po, policy) |
1708 | policy_cnt++; | |
1709 | ||
a4152e3f LP |
1710 | if (world_policy >= 0) |
1711 | policy_cnt++; | |
1712 | ||
fa7796e9 | 1713 | size = offsetof(struct kdbus_cmd_hello, items) + |
1683342a DM |
1714 | ALIGN8(offsetof(struct kdbus_item, str) + strlen(name) + 1) + |
1715 | policy_cnt * ALIGN8(offsetof(struct kdbus_item, policy_access) + sizeof(struct kdbus_policy_access)); | |
1716 | ||
7f3d3ba1 | 1717 | hello = alloca0_align(size, 8); |
e821075a LP |
1718 | |
1719 | n = hello->items; | |
1720 | strcpy(n->str, name); | |
1721 | n->size = offsetof(struct kdbus_item, str) + strlen(n->str) + 1; | |
613ec4b8 | 1722 | n->type = KDBUS_ITEM_NAME; |
1683342a DM |
1723 | n = KDBUS_ITEM_NEXT(n); |
1724 | ||
1725 | LIST_FOREACH(policy, po, policy) { | |
1726 | n->type = KDBUS_ITEM_POLICY_ACCESS; | |
1727 | n->size = offsetof(struct kdbus_item, policy_access) + sizeof(struct kdbus_policy_access); | |
a4152e3f LP |
1728 | |
1729 | r = bus_kernel_translate_policy(po, n); | |
1730 | if (r < 0) | |
1731 | return r; | |
1732 | ||
1683342a DM |
1733 | n = KDBUS_ITEM_NEXT(n); |
1734 | } | |
e821075a | 1735 | |
a4152e3f LP |
1736 | if (world_policy >= 0) { |
1737 | n->type = KDBUS_ITEM_POLICY_ACCESS; | |
1738 | n->size = offsetof(struct kdbus_item, policy_access) + sizeof(struct kdbus_policy_access); | |
1739 | n->policy_access.type = KDBUS_POLICY_ACCESS_WORLD; | |
1740 | n->policy_access.access = bus_kernel_translate_access(world_policy); | |
1741 | } | |
1742 | ||
1683342a | 1743 | hello->size = size; |
bc75205c | 1744 | hello->flags = |
5892a914 DM |
1745 | (activating ? KDBUS_HELLO_ACTIVATOR : KDBUS_HELLO_POLICY_HOLDER) | |
1746 | (accept_fd ? KDBUS_HELLO_ACCEPT_FD : 0); | |
e821075a | 1747 | hello->pool_size = KDBUS_POOL_SIZE; |
6f5c810a | 1748 | hello->attach_flags_send = _KDBUS_ATTACH_ANY; |
38813cc8 | 1749 | hello->attach_flags_recv = _KDBUS_ATTACH_ANY; |
e821075a | 1750 | |
a4152e3f | 1751 | if (ioctl(fd, KDBUS_CMD_HELLO, hello) < 0) |
e821075a | 1752 | return -errno; |
e821075a | 1753 | |
4a3e79e1 | 1754 | /* The higher 32bit of the bus_flags fields are considered |
e821075a | 1755 | * 'incompatible flags'. Refuse them all for now. */ |
4a3e79e1 | 1756 | if (hello->bus_flags > 0xFFFFFFFFULL) |
e821075a | 1757 | return -ENOTSUP; |
e821075a | 1758 | |
a4152e3f | 1759 | if (!bloom_validate_parameters((size_t) hello->bloom.size, (unsigned) hello->bloom.n_hash)) |
e821075a | 1760 | return -ENOTSUP; |
e821075a LP |
1761 | |
1762 | return fd; | |
1763 | } | |
1764 | ||
ae095f86 LP |
1765 | int bus_kernel_try_close(sd_bus *bus) { |
1766 | assert(bus); | |
1767 | assert(bus->is_kernel); | |
1768 | ||
1769 | if (ioctl(bus->input_fd, KDBUS_CMD_BYEBYE) < 0) | |
1770 | return -errno; | |
1771 | ||
1772 | return 0; | |
1773 | } | |
ff975efb LP |
1774 | |
1775 | int bus_kernel_drop_one(int fd) { | |
1776 | struct kdbus_cmd_recv recv = { | |
1777 | .flags = KDBUS_RECV_DROP | |
1778 | }; | |
1779 | ||
1780 | assert(fd >= 0); | |
1781 | ||
1782 | if (ioctl(fd, KDBUS_CMD_MSG_RECV, &recv) < 0) | |
1783 | return -errno; | |
1784 | ||
1785 | return 0; | |
1786 | } | |
b5dae4c7 LP |
1787 | |
1788 | int bus_kernel_realize_attach_flags(sd_bus *bus) { | |
1789 | struct kdbus_cmd_update *update; | |
1790 | struct kdbus_item *n; | |
1791 | ||
1792 | assert(bus); | |
1793 | assert(bus->is_kernel); | |
1794 | ||
fa7796e9 LP |
1795 | update = alloca0_align(offsetof(struct kdbus_cmd_update, items) + |
1796 | ALIGN8(offsetof(struct kdbus_item, data64) + sizeof(uint64_t)), | |
1797 | 8); | |
b5dae4c7 LP |
1798 | |
1799 | n = update->items; | |
1800 | n->type = KDBUS_ITEM_ATTACH_FLAGS_RECV; | |
1801 | n->size = offsetof(struct kdbus_item, data64) + sizeof(uint64_t); | |
1802 | n->data64[0] = bus->attach_flags; | |
1803 | ||
fa7796e9 LP |
1804 | update->size = |
1805 | offsetof(struct kdbus_cmd_update, items) + | |
1806 | ALIGN8(n->size); | |
b5dae4c7 LP |
1807 | |
1808 | if (ioctl(bus->input_fd, KDBUS_CMD_CONN_UPDATE, update) < 0) | |
1809 | return -errno; | |
1810 | ||
1811 | return 0; | |
1812 | } | |
1a299299 LP |
1813 | |
1814 | int bus_kernel_fix_attach_mask(void) { | |
1815 | _cleanup_free_ char *mask = NULL; | |
412c18f1 | 1816 | uint64_t m = (uint64_t) -1; |
1a299299 LP |
1817 | char buf[2+16+2]; |
1818 | int r; | |
1819 | ||
412c18f1 LP |
1820 | /* By default we don't want any kdbus metadata fields to be |
1821 | * suppressed, hence we reset the kernel mask for it to | |
1822 | * (uint64_t) -1. This is overridable via a kernel command | |
1823 | * line option, however. */ | |
1824 | ||
1a299299 | 1825 | r = get_proc_cmdline_key("systemd.kdbus_attach_flags_mask=", &mask); |
1214b53c LP |
1826 | if (r < 0) |
1827 | return log_warning_errno(r, "Failed to read kernel command line: %m"); | |
1a299299 LP |
1828 | |
1829 | if (mask) { | |
1830 | const char *p = mask; | |
1831 | ||
1832 | if (startswith(p, "0x")) | |
1833 | p += 2; | |
1834 | ||
1835 | if (sscanf(p, "%" PRIx64, &m) != 1) | |
1836 | log_warning("Couldn't parse systemd.kdbus_attach_flags_mask= kernel command line parameter."); | |
1837 | } | |
1838 | ||
1839 | sprintf(buf, "0x%" PRIx64 "\n", m); | |
1840 | r = write_string_file("/sys/module/kdbus/parameters/attach_flags_mask", buf); | |
1214b53c LP |
1841 | if (r < 0) |
1842 | return log_full_errno( | |
1843 | r == -EROFS ? LOG_DEBUG : LOG_WARNING, r, | |
1844 | "Failed to write kdbus attach mask: %m"); | |
1a299299 LP |
1845 | |
1846 | return 0; | |
1847 | } |