1 /*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
4 This file is part of systemd.
6 Copyright 2013 Lennart Poettering
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.
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.
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/>.
22 #ifdef HAVE_VALGRIND_MEMCHECK_H
23 #include <valgrind/memcheck.h>
32 #include "bus-internal.h"
33 #include "bus-message.h"
34 #include "bus-kernel.h"
35 #include "bus-bloom.h"
38 #define UNIQUE_NAME_MAX (3+DECIMAL_STR_MAX(uint64_t))
40 int bus_kernel_parse_unique_name(const char *s, uint64_t *id) {
46 if (!startswith(s, ":1."))
49 r = safe_atou64(s + 3, id);
56 static void append_payload_vec(struct kdbus_item **d, const void *p, size_t sz) {
62 /* Note that p can be NULL, which encodes a region full of
63 * zeroes, which is useful to optimize certain padding
66 (*d)->size = offsetof(struct kdbus_item, vec) + sizeof(struct kdbus_vec);
67 (*d)->type = KDBUS_ITEM_PAYLOAD_VEC;
68 (*d)->vec.address = PTR_TO_UINT64(p);
71 *d = (struct kdbus_item *) ((uint8_t*) *d + (*d)->size);
74 static void append_payload_memfd(struct kdbus_item **d, int memfd, size_t sz) {
80 (*d)->size = offsetof(struct kdbus_item, memfd) + sizeof(struct kdbus_memfd);
81 (*d)->type = KDBUS_ITEM_PAYLOAD_MEMFD;
82 (*d)->memfd.fd = memfd;
83 (*d)->memfd.size = sz;
85 *d = (struct kdbus_item *) ((uint8_t*) *d + (*d)->size);
88 static void append_destination(struct kdbus_item **d, const char *s, size_t length) {
94 (*d)->size = offsetof(struct kdbus_item, str) + length + 1;
95 (*d)->type = KDBUS_ITEM_DST_NAME;
96 memcpy((*d)->str, s, length + 1);
98 *d = (struct kdbus_item *) ((uint8_t*) *d + (*d)->size);
101 static void* append_bloom(struct kdbus_item **d, size_t length) {
108 (*d)->size = offsetof(struct kdbus_item, data) + length;
109 (*d)->type = KDBUS_ITEM_BLOOM;
112 *d = (struct kdbus_item *) ((uint8_t*) *d + (*d)->size);
117 static void append_fds(struct kdbus_item **d, const int fds[], unsigned n_fds) {
123 (*d)->size = offsetof(struct kdbus_item, fds) + sizeof(int) * n_fds;
124 (*d)->type = KDBUS_ITEM_FDS;
125 memcpy((*d)->fds, fds, sizeof(int) * n_fds);
127 *d = (struct kdbus_item *) ((uint8_t*) *d + (*d)->size);
130 static int bus_message_setup_bloom(sd_bus_message *m, void *bloom) {
137 memset(bloom, 0, BLOOM_SIZE);
139 bloom_add_pair(bloom, "message-type", bus_message_type_to_string(m->header->type));
142 bloom_add_pair(bloom, "interface", m->interface);
144 bloom_add_pair(bloom, "member", m->member);
146 bloom_add_pair(bloom, "path", m->path);
147 bloom_add_pair(bloom, "path-slash-prefix", m->path);
148 bloom_add_prefixes(bloom, "path-slash-prefix", m->path, '/');
151 r = sd_bus_message_rewind(m, true);
155 for (i = 0; i < 64; i++) {
158 char buf[sizeof("arg")-1 + 2 + sizeof("-slash-prefix")];
161 r = sd_bus_message_peek_type(m, &type, NULL);
165 if (type != SD_BUS_TYPE_STRING &&
166 type != SD_BUS_TYPE_OBJECT_PATH &&
167 type != SD_BUS_TYPE_SIGNATURE)
170 r = sd_bus_message_read_basic(m, type, &t);
174 e = stpcpy(buf, "arg");
178 *(e++) = '0' + (i / 10);
179 *(e++) = '0' + (i % 10);
183 bloom_add_pair(bloom, buf, t);
185 strcpy(e, "-dot-prefix");
186 bloom_add_prefixes(bloom, buf, t, '.');
187 strcpy(e, "-slash-prefix");
188 bloom_add_prefixes(bloom, buf, t, '/');
194 static int bus_message_setup_kmsg(sd_bus *b, sd_bus_message *m) {
195 struct bus_body_part *part;
196 struct kdbus_item *d;
210 if (m->destination) {
211 r = bus_kernel_parse_unique_name(m->destination, &unique);
219 sz = offsetof(struct kdbus_msg, items);
221 assert_cc(ALIGN8(offsetof(struct kdbus_item, vec) + sizeof(struct kdbus_vec)) ==
222 ALIGN8(offsetof(struct kdbus_item, memfd) + sizeof(struct kdbus_memfd)));
224 /* Add in fixed header, fields header and payload */
225 sz += (1 + m->n_body_parts) *
226 ALIGN8(offsetof(struct kdbus_item, vec) + sizeof(struct kdbus_vec));
228 /* Add space for bloom filter */
229 sz += ALIGN8(offsetof(struct kdbus_item, data) + BLOOM_SIZE);
231 /* Add in well-known destination header */
233 dl = strlen(m->destination);
234 sz += ALIGN8(offsetof(struct kdbus_item, str) + dl + 1);
237 /* Add space for unix fds */
239 sz += ALIGN8(offsetof(struct kdbus_item, fds) + sizeof(int)*m->n_fds);
241 m->kdbus = memalign(8, sz);
247 m->free_kdbus = true;
248 memset(m->kdbus, 0, sz);
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);
255 m->destination ? unique : KDBUS_DST_ID_BROADCAST;
256 m->kdbus->payload_type = KDBUS_PAYLOAD_DBUS1;
257 m->kdbus->cookie = m->header->serial;
259 m->kdbus->timeout_ns = m->timeout * NSEC_PER_USEC;
264 append_destination(&d, m->destination, dl);
266 append_payload_vec(&d, m->header, BUS_MESSAGE_BODY_BEGIN(m));
268 MESSAGE_FOREACH_PART(part, i, m) {
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 */
275 append_payload_vec(&d, NULL, part->size);
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 */
283 append_payload_memfd(&d, part->memfd, part->size);
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);
293 append_payload_vec(&d, part->data, part->size);
296 if (m->kdbus->dst_id == KDBUS_DST_ID_BROADCAST) {
299 p = append_bloom(&d, BLOOM_SIZE);
300 r = bus_message_setup_bloom(m, p);
306 append_fds(&d, m->fds, m->n_fds);
308 m->kdbus->size = (uint8_t*) d - (uint8_t*) m->kdbus;
309 assert(m->kdbus->size <= sz);
318 int bus_kernel_take_fd(sd_bus *b) {
319 struct kdbus_cmd_hello hello;
330 hello.size = sizeof(hello);
331 hello.conn_flags = b->hello_flags;
332 hello.attach_flags = b->attach_flags;
333 hello.pool_size = KDBUS_POOL_SIZE;
335 r = ioctl(b->input_fd, KDBUS_CMD_HELLO, &hello);
339 if (!b->kdbus_buffer) {
340 b->kdbus_buffer = mmap(NULL, KDBUS_POOL_SIZE, PROT_READ, MAP_SHARED, b->input_fd, 0);
341 if (b->kdbus_buffer == MAP_FAILED) {
342 b->kdbus_buffer = NULL;
347 /* The higher 32bit of both flags fields are considered
348 * 'incompatible flags'. Refuse them all for now. */
349 if (hello.bus_flags > 0xFFFFFFFFULL ||
350 hello.conn_flags > 0xFFFFFFFFULL)
353 if (hello.bloom_size != BLOOM_SIZE)
356 if (asprintf(&b->unique_name, ":1.%llu", (unsigned long long) hello.id) < 0)
360 b->bus_client = true;
361 b->can_fds = !!(hello.conn_flags & KDBUS_HELLO_ACCEPT_FD);
363 /* the kernel told us the UUID of the underlying bus */
364 memcpy(b->server_id.bytes, hello.id128, sizeof(b->server_id.bytes));
366 r = bus_start_running(b);
373 int bus_kernel_connect(sd_bus *b) {
375 assert(b->input_fd < 0);
376 assert(b->output_fd < 0);
382 b->input_fd = open(b->kernel, O_RDWR|O_NOCTTY|O_CLOEXEC);
386 b->output_fd = b->input_fd;
388 return bus_kernel_take_fd(b);
391 int bus_kernel_write_message(sd_bus *bus, sd_bus_message *m) {
396 assert(bus->state == BUS_RUNNING);
398 r = bus_message_setup_kmsg(bus, m);
402 r = ioctl(bus->output_fd, KDBUS_CMD_MSG_SEND, m->kdbus);
404 return errno == EAGAIN ? 0 : -errno;
409 static void close_kdbus_msg(sd_bus *bus, struct kdbus_msg *k) {
411 struct kdbus_item *d;
416 off = (uint8_t *)k - (uint8_t *)bus->kdbus_buffer;
417 ioctl(bus->input_fd, KDBUS_CMD_MSG_RELEASE, &off);
419 KDBUS_PART_FOREACH(d, k, items) {
421 if (d->type == KDBUS_ITEM_FDS)
422 close_many(d->fds, (d->size - offsetof(struct kdbus_item, fds)) / sizeof(int));
423 else if (d->type == KDBUS_ITEM_PAYLOAD_MEMFD)
424 close_nointr_nofail(d->memfd.fd);
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;
435 r = sd_bus_message_new_signal(
437 "/org/freedesktop/DBus",
438 "org.freedesktop.DBus",
444 r = sd_bus_message_append(m, "sss", name, old_owner, new_owner);
448 m->sender = "org.freedesktop.DBus";
450 r = bus_seal_message(bus, m);
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];
468 if (d->name_change.flags != 0)
471 if (d->type == KDBUS_ITEM_NAME_ADD)
474 sprintf(old_owner, ":1.%llu", (unsigned long long) d->name_change.old_id);
476 if (d->type == KDBUS_ITEM_NAME_REMOVE)
479 sprintf(new_owner, ":1.%llu", (unsigned long long) d->name_change.new_id);
481 return return_name_owner_changed(bus, d->name_change.name, old_owner, new_owner, ret);
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];
492 sprintf(owner, ":1.%llu", d->id_change.id);
494 return return_name_owner_changed(
496 d->type == KDBUS_ITEM_ID_ADD ? NULL : owner,
497 d->type == KDBUS_ITEM_ID_ADD ? owner : NULL,
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;
510 r = bus_message_new_synthetic_error(
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"),
520 m->sender = "org.freedesktop.DBus";
522 r = bus_seal_message(bus, m);
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;
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,
540 [KDBUS_ITEM_ID_ADD - _KDBUS_ITEM_KERNEL_BASE] = translate_id_change,
541 [KDBUS_ITEM_ID_REMOVE - _KDBUS_ITEM_KERNEL_BASE] = translate_id_change,
543 [KDBUS_ITEM_REPLY_TIMEOUT - _KDBUS_ITEM_KERNEL_BASE] = translate_reply,
544 [KDBUS_ITEM_REPLY_DEAD - _KDBUS_ITEM_KERNEL_BASE] = translate_reply,
550 assert(k->payload_type == KDBUS_PAYLOAD_KERNEL);
552 KDBUS_PART_FOREACH(d, k, items) {
553 if (d->type >= _KDBUS_ITEM_KERNEL_BASE && d->type < _KDBUS_ITEM_KERNEL_BASE + ELEMENTSOF(translate)) {
558 log_debug("Got unknown field from kernel %llu", d->type);
562 log_debug("Didn't find a kernel message to translate.");
566 return translate[found->type](bus, k, d, ret);
569 static int bus_kernel_make_message(sd_bus *bus, struct kdbus_msg *k, sd_bus_message **ret) {
570 sd_bus_message *m = NULL;
571 struct kdbus_item *d;
573 _cleanup_free_ int *fds = NULL;
574 struct bus_header *h = NULL;
575 size_t total, n_bytes = 0, idx = 0;
576 const char *destination = NULL, *seclabel = NULL;
582 assert(k->payload_type == KDBUS_PAYLOAD_DBUS1);
584 KDBUS_PART_FOREACH(d, k, items) {
587 l = d->size - offsetof(struct kdbus_item, data);
591 case KDBUS_ITEM_PAYLOAD_OFF:
593 h = (struct bus_header *)((uint8_t *)bus->kdbus_buffer + d->vec.offset);
595 if (!bus_header_is_complete(h, d->vec.size))
599 n_bytes += d->vec.size;
602 case KDBUS_ITEM_PAYLOAD_MEMFD:
606 n_bytes += d->memfd.size;
609 case KDBUS_ITEM_FDS: {
614 f = realloc(fds, sizeof(int) * (n_fds + j));
619 memcpy(fds + n_fds, d->fds, sizeof(int) * j);
624 case KDBUS_ITEM_SECLABEL:
633 r = bus_header_message_size(h, &total);
637 if (n_bytes != total)
640 r = bus_message_from_header(bus, h, sizeof(struct bus_header), fds, n_fds, NULL, seclabel, 0, &m);
644 KDBUS_PART_FOREACH(d, k, items) {
647 l = d->size - offsetof(struct kdbus_item, data);
651 case KDBUS_ITEM_PAYLOAD_OFF: {
654 begin_body = BUS_MESSAGE_BODY_BEGIN(m);
656 if (idx + d->vec.size > begin_body) {
657 struct bus_body_part *part;
659 /* Contains body material */
661 part = message_append_part(m);
667 /* A -1 offset is NUL padding. */
668 part->is_zero = d->vec.offset == ~0ULL;
670 if (idx >= begin_body) {
672 part->data = (uint8_t *)bus->kdbus_buffer + d->vec.offset;
673 part->size = d->vec.size;
676 part->data = (uint8_t *)bus->kdbus_buffer + d->vec.offset + (begin_body - idx);
677 part->size = d->vec.size - (begin_body - idx);
687 case KDBUS_ITEM_PAYLOAD_MEMFD: {
688 struct bus_body_part *part;
690 if (idx < BUS_MESSAGE_BODY_BEGIN(m)) {
695 part = message_append_part(m);
701 part->memfd = d->memfd.fd;
702 part->size = d->memfd.size;
705 idx += d->memfd.size;
709 case KDBUS_ITEM_CREDS:
710 m->creds.pid_starttime = d->creds.starttime / NSEC_PER_USEC;
711 m->creds.uid = d->creds.uid;
712 m->creds.gid = d->creds.gid;
713 m->creds.pid = d->creds.pid;
714 m->creds.tid = d->creds.tid;
715 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;
718 case KDBUS_ITEM_TIMESTAMP:
719 m->realtime = d->timestamp.realtime_ns / NSEC_PER_USEC;
720 m->monotonic = d->timestamp.monotonic_ns / NSEC_PER_USEC;
723 case KDBUS_ITEM_PID_COMM:
724 m->creds.comm = d->str;
725 m->creds.mask |= SD_BUS_CREDS_COMM & bus->creds_mask;
728 case KDBUS_ITEM_TID_COMM:
729 m->creds.tid_comm = d->str;
730 m->creds.mask |= SD_BUS_CREDS_TID_COMM & bus->creds_mask;
734 m->creds.exe = d->str;
735 m->creds.mask |= SD_BUS_CREDS_EXE & bus->creds_mask;
738 case KDBUS_ITEM_CMDLINE:
739 m->creds.cmdline = d->str;
740 m->creds.cmdline_length = l;
741 m->creds.mask |= SD_BUS_CREDS_CMDLINE & bus->creds_mask;
744 case KDBUS_ITEM_CGROUP:
745 m->creds.cgroup = d->str;
746 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;
749 case KDBUS_ITEM_AUDIT:
750 m->creds.audit_session_id = d->audit.sessionid;
751 m->creds.audit_login_uid = d->audit.loginuid;
752 m->creds.mask |= (SD_BUS_CREDS_AUDIT_SESSION_ID|SD_BUS_CREDS_AUDIT_LOGIN_UID) & bus->creds_mask;
755 case KDBUS_ITEM_CAPS:
756 m->creds.capability = d->data;
757 m->creds.capability_size = l;
758 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;
761 case KDBUS_ITEM_DST_NAME:
762 destination = d->str;
766 case KDBUS_ITEM_SECLABEL:
767 case KDBUS_ITEM_NAMES:
771 log_debug("Got unknown field from kernel %llu", d->type);
775 r = bus_message_parse_fields(m);
779 if (k->src_id == KDBUS_SRC_ID_KERNEL)
780 m->sender = "org.freedesktop.DBus";
782 snprintf(m->sender_buffer, sizeof(m->sender_buffer), ":1.%llu", (unsigned long long) k->src_id);
783 m->sender = m->sender_buffer;
786 if (!m->destination) {
788 m->destination = destination;
789 else if (k->dst_id != KDBUS_DST_ID_WELL_KNOWN_NAME &&
790 k->dst_id != KDBUS_DST_ID_BROADCAST) {
791 snprintf(m->destination_buffer, sizeof(m->destination_buffer), ":1.%llu", (unsigned long long) k->dst_id);
792 m->destination = m->destination_buffer;
796 /* We take possession of the kmsg struct now */
798 m->release_kdbus = true;
808 struct bus_body_part *part;
811 /* Make sure the memfds are not freed twice */
812 MESSAGE_FOREACH_PART(part, i, m)
813 if (part->memfd >= 0)
816 sd_bus_message_unref(m);
822 int bus_kernel_read_message(sd_bus *bus, sd_bus_message **m) {
830 r = ioctl(bus->input_fd, KDBUS_CMD_MSG_RECV, &off);
837 k = (struct kdbus_msg *)((uint8_t *)bus->kdbus_buffer + off);
839 if (k->payload_type == KDBUS_PAYLOAD_DBUS1)
840 r = bus_kernel_make_message(bus, k, m);
841 else if (k->payload_type == KDBUS_PAYLOAD_KERNEL)
842 r = bus_kernel_translate_message(bus, k, m);
847 close_kdbus_msg(bus, k);
849 return r < 0 ? r : 1;
852 int bus_kernel_create(const char *name, char **s) {
853 struct kdbus_cmd_bus_make *make;
854 struct kdbus_item *n;
862 fd = open("/dev/kdbus/control", O_RDWR|O_NOCTTY|O_CLOEXEC);
867 make = alloca0(offsetof(struct kdbus_cmd_bus_make, items) +
868 KDBUS_PART_HEADER_SIZE + sizeof(uint64_t) +
869 KDBUS_PART_HEADER_SIZE + DECIMAL_STR_MAX(uid_t) + 1 + l + 1);
872 n->type = KDBUS_MAKE_NAME;
873 sprintf(n->str, "%lu-%s", (unsigned long) getuid(), name);
874 n->size = KDBUS_PART_HEADER_SIZE + strlen(n->str) + 1;
876 make->size = offsetof(struct kdbus_cmd_bus_make, items) + n->size;
877 make->flags = KDBUS_MAKE_POLICY_OPEN;
879 make->bloom_size = BLOOM_SIZE;
880 assert_cc(BLOOM_SIZE % 8 == 0);
882 p = strjoin("/dev/kdbus/", n->str, "/bus", NULL);
886 if (ioctl(fd, KDBUS_CMD_BUS_MAKE, make) < 0) {
887 close_nointr_nofail(fd);
898 int bus_kernel_pop_memfd(sd_bus *bus, void **address, size_t *size) {
899 struct memfd_cache *c;
905 if (!bus || !bus->is_kernel)
908 assert_se(pthread_mutex_lock(&bus->memfd_cache_mutex) >= 0);
910 if (bus->n_memfd_cache <= 0) {
913 assert_se(pthread_mutex_unlock(&bus->memfd_cache_mutex) >= 0);
915 r = ioctl(bus->input_fd, KDBUS_CMD_MEMFD_NEW, &fd);
924 c = &bus->memfd_cache[--bus->n_memfd_cache];
927 assert(c->size == 0 || c->address);
929 *address = c->address;
933 assert_se(pthread_mutex_unlock(&bus->memfd_cache_mutex) >= 0);
938 static void close_and_munmap(int fd, void *address, size_t size) {
940 assert_se(munmap(address, PAGE_ALIGN(size)) >= 0);
942 close_nointr_nofail(fd);
945 void bus_kernel_push_memfd(sd_bus *bus, int fd, void *address, size_t size) {
946 struct memfd_cache *c;
947 uint64_t max_sz = PAGE_ALIGN(MEMFD_CACHE_ITEM_SIZE_MAX);
950 assert(size == 0 || address);
952 if (!bus || !bus->is_kernel) {
953 close_and_munmap(fd, address, size);
957 assert_se(pthread_mutex_lock(&bus->memfd_cache_mutex) >= 0);
959 if (bus->n_memfd_cache >= ELEMENTSOF(bus->memfd_cache)) {
960 assert_se(pthread_mutex_unlock(&bus->memfd_cache_mutex) >= 0);
962 close_and_munmap(fd, address, size);
966 c = &bus->memfd_cache[bus->n_memfd_cache++];
968 c->address = address;
970 /* If overly long, let's return a bit to the OS */
972 assert_se(ioctl(fd, KDBUS_CMD_MEMFD_SIZE_SET, &max_sz) >= 0);
973 assert_se(munmap((uint8_t*) address + max_sz, PAGE_ALIGN(size - max_sz)) >= 0);
978 assert_se(pthread_mutex_unlock(&bus->memfd_cache_mutex) >= 0);
981 void bus_kernel_flush_memfd(sd_bus *b) {
986 for (i = 0; i < b->n_memfd_cache; i++)
987 close_and_munmap(b->memfd_cache[i].fd, b->memfd_cache[i].address, b->memfd_cache[i].size);
990 int sd_bus_kernel_translate_request_name_flags(uint64_t sd_bus_flags, uint64_t *kdbus_flags) {
992 assert_return(kdbus_flags != NULL, -EINVAL);
996 if (sd_bus_flags & SD_BUS_NAME_ALLOW_REPLACEMENT)
997 *kdbus_flags |= KDBUS_NAME_ALLOW_REPLACEMENT;
999 if (sd_bus_flags & SD_BUS_NAME_REPLACE_EXISTING)
1000 *kdbus_flags |= KDBUS_NAME_REPLACE_EXISTING;
1002 if (!(sd_bus_flags & SD_BUS_NAME_DO_NOT_QUEUE))
1003 *kdbus_flags |= KDBUS_NAME_QUEUE;