2013-04-11 23:09:29 +02:00
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/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
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/***
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This file is part of systemd.
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Copyright 2013 Lennart Poettering
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systemd is free software; you can redistribute it and/or modify it
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under the terms of the GNU Lesser General Public License as published by
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the Free Software Foundation; either version 2.1 of the License, or
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(at your option) any later version.
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systemd is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public License
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along with systemd; If not, see <http://www.gnu.org/licenses/>.
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***/
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2013-04-12 02:19:26 +02:00
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#ifdef HAVE_VALGRIND_MEMCHECK_H
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#include <valgrind/memcheck.h>
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#endif
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2013-04-11 23:09:29 +02:00
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#include <fcntl.h>
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2013-04-17 18:45:45 +02:00
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#include <malloc.h>
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2013-05-10 03:36:55 +02:00
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#include <sys/mman.h>
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2014-01-22 16:09:59 +01:00
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#include <sys/prctl.h>
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2013-04-11 23:09:29 +02:00
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#include "util.h"
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2013-12-04 23:36:02 +01:00
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#include "strv.h"
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2013-04-11 23:09:29 +02:00
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#include "bus-internal.h"
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#include "bus-message.h"
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#include "bus-kernel.h"
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2013-04-14 17:49:18 +02:00
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#include "bus-bloom.h"
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2013-11-29 20:07:56 +01:00
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#include "bus-util.h"
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2014-03-11 19:03:50 +01:00
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#include "bus-label.h"
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2013-12-24 19:31:44 +01:00
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#include "cgroup-util.h"
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2013-11-29 20:07:56 +01:00
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#define UNIQUE_NAME_MAX (3+DECIMAL_STR_MAX(uint64_t))
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2013-04-11 23:09:29 +02:00
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2013-05-19 18:39:08 +02:00
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int bus_kernel_parse_unique_name(const char *s, uint64_t *id) {
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2013-04-11 23:09:29 +02:00
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int r;
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assert(s);
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assert(id);
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if (!startswith(s, ":1."))
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return 0;
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r = safe_atou64(s + 3, id);
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if (r < 0)
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return r;
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return 1;
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}
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2013-05-02 19:01:49 +02:00
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static void append_payload_vec(struct kdbus_item **d, const void *p, size_t sz) {
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2013-04-11 23:09:29 +02:00
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assert(d);
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assert(sz > 0);
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2013-04-12 21:43:50 +02:00
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*d = ALIGN8_PTR(*d);
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2013-05-16 16:26:35 +02:00
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/* Note that p can be NULL, which encodes a region full of
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* zeroes, which is useful to optimize certain padding
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* conditions */
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2013-05-02 19:01:49 +02:00
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(*d)->size = offsetof(struct kdbus_item, vec) + sizeof(struct kdbus_vec);
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2013-11-29 18:10:36 +01:00
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(*d)->type = KDBUS_ITEM_PAYLOAD_VEC;
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2013-05-16 02:04:13 +02:00
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(*d)->vec.address = PTR_TO_UINT64(p);
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2013-04-11 23:09:29 +02:00
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(*d)->vec.size = sz;
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2013-05-02 19:01:49 +02:00
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*d = (struct kdbus_item *) ((uint8_t*) *d + (*d)->size);
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2013-04-11 23:09:29 +02:00
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}
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2013-05-16 02:04:13 +02:00
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static void append_payload_memfd(struct kdbus_item **d, int memfd, size_t sz) {
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assert(d);
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assert(memfd >= 0);
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assert(sz > 0);
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*d = ALIGN8_PTR(*d);
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(*d)->size = offsetof(struct kdbus_item, memfd) + sizeof(struct kdbus_memfd);
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2013-11-29 18:10:36 +01:00
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(*d)->type = KDBUS_ITEM_PAYLOAD_MEMFD;
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2013-05-16 02:04:13 +02:00
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(*d)->memfd.fd = memfd;
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(*d)->memfd.size = sz;
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*d = (struct kdbus_item *) ((uint8_t*) *d + (*d)->size);
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}
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2013-05-02 19:01:49 +02:00
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static void append_destination(struct kdbus_item **d, const char *s, size_t length) {
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2013-04-11 23:09:29 +02:00
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assert(d);
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2013-04-12 22:48:34 +02:00
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assert(s);
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2013-04-11 23:09:29 +02:00
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2013-04-12 21:43:50 +02:00
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*d = ALIGN8_PTR(*d);
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2013-05-02 19:01:49 +02:00
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(*d)->size = offsetof(struct kdbus_item, str) + length + 1;
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2013-11-29 18:10:36 +01:00
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(*d)->type = KDBUS_ITEM_DST_NAME;
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2013-04-12 20:17:00 +02:00
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memcpy((*d)->str, s, length + 1);
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2013-04-11 23:09:29 +02:00
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2013-05-02 19:01:49 +02:00
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*d = (struct kdbus_item *) ((uint8_t*) *d + (*d)->size);
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2013-04-11 23:09:29 +02:00
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}
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2014-01-24 17:06:36 +01:00
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static struct kdbus_bloom_filter *append_bloom(struct kdbus_item **d, size_t length) {
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struct kdbus_item *i;
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2013-04-14 17:49:18 +02:00
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2013-04-12 22:48:34 +02:00
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assert(d);
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2014-01-24 17:06:36 +01:00
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i = ALIGN8_PTR(*d);
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2013-04-12 22:48:34 +02:00
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2014-01-24 17:06:36 +01:00
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i->size = offsetof(struct kdbus_item, bloom_filter) +
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offsetof(struct kdbus_bloom_filter, data) +
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length;
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i->type = KDBUS_ITEM_BLOOM_FILTER;
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2013-04-12 22:48:34 +02:00
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2014-01-24 17:06:36 +01:00
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*d = (struct kdbus_item *) ((uint8_t*) i + i->size);
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2013-04-14 17:49:18 +02:00
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2014-01-24 17:06:36 +01:00
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return &i->bloom_filter;
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2013-04-14 17:49:18 +02:00
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}
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2013-05-02 19:01:49 +02:00
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static void append_fds(struct kdbus_item **d, const int fds[], unsigned n_fds) {
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2013-04-22 03:24:50 +02:00
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assert(d);
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assert(fds);
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assert(n_fds > 0);
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*d = ALIGN8_PTR(*d);
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2013-05-02 19:01:49 +02:00
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(*d)->size = offsetof(struct kdbus_item, fds) + sizeof(int) * n_fds;
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2013-11-29 18:10:36 +01:00
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(*d)->type = KDBUS_ITEM_FDS;
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2013-04-22 03:24:50 +02:00
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memcpy((*d)->fds, fds, sizeof(int) * n_fds);
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2013-05-02 19:01:49 +02:00
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*d = (struct kdbus_item *) ((uint8_t*) *d + (*d)->size);
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2013-04-22 03:24:50 +02:00
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}
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2014-01-24 17:06:36 +01:00
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static int bus_message_setup_bloom(sd_bus_message *m, struct kdbus_bloom_filter *bloom) {
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void *data;
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2013-04-14 17:49:18 +02:00
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unsigned i;
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int r;
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assert(m);
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assert(bloom);
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2014-01-24 17:06:36 +01:00
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data = bloom->data;
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2014-01-31 06:51:32 +01:00
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memzero(data, m->bus->bloom_size);
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2014-01-24 17:06:36 +01:00
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bloom->generation = 0;
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2013-04-14 17:49:18 +02:00
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2014-01-28 00:57:38 +01:00
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bloom_add_pair(data, m->bus->bloom_size, m->bus->bloom_n_hash, "message-type", bus_message_type_to_string(m->header->type));
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2013-04-14 17:49:18 +02:00
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if (m->interface)
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2014-01-28 00:57:38 +01:00
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bloom_add_pair(data, m->bus->bloom_size, m->bus->bloom_n_hash, "interface", m->interface);
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2013-04-14 17:49:18 +02:00
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if (m->member)
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2014-01-28 00:57:38 +01:00
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bloom_add_pair(data, m->bus->bloom_size, m->bus->bloom_n_hash, "member", m->member);
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2013-04-14 17:49:18 +02:00
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if (m->path) {
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2014-01-28 00:57:38 +01:00
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bloom_add_pair(data, m->bus->bloom_size, m->bus->bloom_n_hash, "path", m->path);
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bloom_add_pair(data, m->bus->bloom_size, m->bus->bloom_n_hash, "path-slash-prefix", m->path);
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bloom_add_prefixes(data, m->bus->bloom_size, m->bus->bloom_n_hash, "path-slash-prefix", m->path, '/');
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2013-04-14 17:49:18 +02:00
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}
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r = sd_bus_message_rewind(m, true);
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if (r < 0)
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return r;
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for (i = 0; i < 64; i++) {
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char type;
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const char *t;
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char buf[sizeof("arg")-1 + 2 + sizeof("-slash-prefix")];
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char *e;
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r = sd_bus_message_peek_type(m, &type, NULL);
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if (r < 0)
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return r;
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if (type != SD_BUS_TYPE_STRING &&
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type != SD_BUS_TYPE_OBJECT_PATH &&
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type != SD_BUS_TYPE_SIGNATURE)
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break;
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r = sd_bus_message_read_basic(m, type, &t);
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if (r < 0)
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return r;
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e = stpcpy(buf, "arg");
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if (i < 10)
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2013-12-25 17:46:45 +01:00
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*(e++) = '0' + (char) i;
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2013-04-14 17:49:18 +02:00
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else {
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2013-12-25 17:46:45 +01:00
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*(e++) = '0' + (char) (i / 10);
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*(e++) = '0' + (char) (i % 10);
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2013-04-14 17:49:18 +02:00
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}
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*e = 0;
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2014-01-28 00:57:38 +01:00
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bloom_add_pair(data, m->bus->bloom_size, m->bus->bloom_n_hash, buf, t);
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2013-04-14 17:49:18 +02:00
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strcpy(e, "-dot-prefix");
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2014-01-28 00:57:38 +01:00
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bloom_add_prefixes(data, m->bus->bloom_size, m->bus->bloom_n_hash, buf, t, '.');
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2013-04-14 17:49:18 +02:00
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strcpy(e, "-slash-prefix");
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2014-01-28 00:57:38 +01:00
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bloom_add_prefixes(data, m->bus->bloom_size, m->bus->bloom_n_hash, buf, t, '/');
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2013-04-14 17:49:18 +02:00
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}
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return 0;
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2013-04-12 22:48:34 +02:00
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}
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2013-04-13 20:12:27 +02:00
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static int bus_message_setup_kmsg(sd_bus *b, sd_bus_message *m) {
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2013-05-15 01:43:15 +02:00
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struct bus_body_part *part;
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2013-05-02 19:01:49 +02:00
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struct kdbus_item *d;
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2013-04-11 23:09:29 +02:00
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bool well_known;
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uint64_t unique;
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size_t sz, dl;
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2013-05-15 01:43:15 +02:00
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unsigned i;
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2013-04-11 23:09:29 +02:00
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int r;
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2013-04-13 20:12:27 +02:00
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assert(b);
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2013-04-11 23:09:29 +02:00
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assert(m);
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assert(m->sealed);
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2013-04-12 01:16:40 +02:00
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2014-01-21 15:02:07 +01:00
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/* We put this together only once, if this message is reused
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* we reuse the earlier-built version */
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2013-04-12 01:16:40 +02:00
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if (m->kdbus)
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return 0;
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2013-04-11 23:09:29 +02:00
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if (m->destination) {
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2013-05-19 18:39:08 +02:00
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r = bus_kernel_parse_unique_name(m->destination, &unique);
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2013-04-11 23:09:29 +02:00
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if (r < 0)
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return r;
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well_known = r == 0;
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} else
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well_known = false;
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2013-04-15 23:32:38 +02:00
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sz = offsetof(struct kdbus_msg, items);
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2013-04-11 23:09:29 +02:00
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2013-05-16 02:04:13 +02:00
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assert_cc(ALIGN8(offsetof(struct kdbus_item, vec) + sizeof(struct kdbus_vec)) ==
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ALIGN8(offsetof(struct kdbus_item, memfd) + sizeof(struct kdbus_memfd)));
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2013-04-13 21:53:11 +02:00
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/* Add in fixed header, fields header and payload */
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2013-05-15 02:56:45 +02:00
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sz += (1 + m->n_body_parts) *
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2013-05-14 22:24:26 +02:00
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ALIGN8(offsetof(struct kdbus_item, vec) + sizeof(struct kdbus_vec));
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2013-04-11 23:09:29 +02:00
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2013-04-13 21:53:11 +02:00
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/* Add space for bloom filter */
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2014-01-24 17:06:36 +01:00
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sz += ALIGN8(offsetof(struct kdbus_item, bloom_filter) +
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offsetof(struct kdbus_bloom_filter, data) +
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2014-01-28 00:57:38 +01:00
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m->bus->bloom_size);
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2013-04-12 22:48:34 +02:00
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2013-04-11 23:09:29 +02:00
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/* Add in well-known destination header */
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if (well_known) {
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dl = strlen(m->destination);
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2013-05-02 19:01:49 +02:00
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sz += ALIGN8(offsetof(struct kdbus_item, str) + dl + 1);
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2013-04-11 23:09:29 +02:00
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}
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2013-04-22 03:24:50 +02:00
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/* Add space for unix fds */
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if (m->n_fds > 0)
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2013-05-02 19:01:49 +02:00
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sz += ALIGN8(offsetof(struct kdbus_item, fds) + sizeof(int)*m->n_fds);
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2013-04-22 03:24:50 +02:00
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2013-04-17 18:45:45 +02:00
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m->kdbus = memalign(8, sz);
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2013-05-16 16:26:35 +02:00
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if (!m->kdbus) {
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r = -ENOMEM;
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goto fail;
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}
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2013-04-11 23:09:29 +02:00
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2013-05-16 16:26:35 +02:00
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m->free_kdbus = true;
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2014-01-31 06:51:32 +01:00
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memzero(m->kdbus, sz);
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2013-04-12 21:44:14 +02:00
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2013-04-11 23:09:29 +02:00
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m->kdbus->flags =
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2013-12-03 18:13:48 +01:00
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((m->header->flags & BUS_MESSAGE_NO_REPLY_EXPECTED) ? 0 : KDBUS_MSG_FLAGS_EXPECT_REPLY) |
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2014-01-20 23:42:05 +01:00
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((m->header->flags & BUS_MESSAGE_NO_AUTO_START) ? KDBUS_MSG_FLAGS_NO_AUTO_START : 0);
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2013-04-11 23:09:29 +02:00
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m->kdbus->dst_id =
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well_known ? 0 :
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2013-04-12 22:48:34 +02:00
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m->destination ? unique : KDBUS_DST_ID_BROADCAST;
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2013-12-09 23:03:21 +01:00
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m->kdbus->payload_type = KDBUS_PAYLOAD_DBUS;
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2013-04-11 23:09:29 +02:00
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|
|
m->kdbus->cookie = m->header->serial;
|
2014-01-22 20:01:23 +01:00
|
|
|
m->kdbus->priority = m->priority;
|
2013-12-25 16:42:50 +01:00
|
|
|
|
|
|
|
if (m->header->flags & BUS_MESSAGE_NO_REPLY_EXPECTED)
|
2013-12-25 17:46:45 +01:00
|
|
|
m->kdbus->cookie_reply = m->reply_cookie;
|
2013-12-25 16:42:50 +01:00
|
|
|
else
|
|
|
|
m->kdbus->timeout_ns = m->timeout * NSEC_PER_USEC;
|
2013-04-11 23:09:29 +02:00
|
|
|
|
2013-04-15 23:32:38 +02:00
|
|
|
d = m->kdbus->items;
|
2013-04-11 23:09:29 +02:00
|
|
|
|
|
|
|
if (well_known)
|
|
|
|
append_destination(&d, m->destination, dl);
|
|
|
|
|
2013-05-15 02:56:45 +02:00
|
|
|
append_payload_vec(&d, m->header, BUS_MESSAGE_BODY_BEGIN(m));
|
2013-05-16 02:04:13 +02:00
|
|
|
|
|
|
|
MESSAGE_FOREACH_PART(part, i, m) {
|
|
|
|
if (part->is_zero) {
|
2013-05-16 16:26:35 +02:00
|
|
|
/* If this is padding then simply send a
|
|
|
|
* vector with a NULL data pointer which the
|
|
|
|
* kernel will just pass through. This is the
|
|
|
|
* most efficient way to encode zeroes */
|
|
|
|
|
2013-05-16 02:04:13 +02:00
|
|
|
append_payload_vec(&d, NULL, part->size);
|
|
|
|
continue;
|
|
|
|
}
|
|
|
|
|
2013-05-16 16:26:35 +02:00
|
|
|
if (part->memfd >= 0 && part->sealed && m->destination) {
|
|
|
|
/* Try to send a memfd, if the part is
|
|
|
|
* sealed and this is not a broadcast. Since we can only */
|
2013-05-16 02:04:13 +02:00
|
|
|
|
2013-05-16 16:26:35 +02:00
|
|
|
append_payload_memfd(&d, part->memfd, part->size);
|
|
|
|
continue;
|
2013-05-16 02:04:13 +02:00
|
|
|
}
|
|
|
|
|
2014-02-17 03:37:13 +01:00
|
|
|
/* Otherwise, let's send a vector to the actual data.
|
|
|
|
* For that, we need to map it first. */
|
2013-05-16 16:26:35 +02:00
|
|
|
r = bus_body_part_map(part);
|
|
|
|
if (r < 0)
|
|
|
|
goto fail;
|
2013-05-16 02:04:13 +02:00
|
|
|
|
2013-05-14 22:24:26 +02:00
|
|
|
append_payload_vec(&d, part->data, part->size);
|
2013-05-16 02:04:13 +02:00
|
|
|
}
|
2013-04-11 23:09:29 +02:00
|
|
|
|
2013-04-13 20:12:27 +02:00
|
|
|
if (m->kdbus->dst_id == KDBUS_DST_ID_BROADCAST) {
|
2014-01-24 17:06:36 +01:00
|
|
|
struct kdbus_bloom_filter *bloom;
|
2013-04-13 20:12:27 +02:00
|
|
|
|
2014-01-28 00:57:38 +01:00
|
|
|
bloom = append_bloom(&d, m->bus->bloom_size);
|
2014-01-24 17:06:36 +01:00
|
|
|
r = bus_message_setup_bloom(m, bloom);
|
2013-05-16 02:04:13 +02:00
|
|
|
if (r < 0)
|
|
|
|
goto fail;
|
2013-04-13 20:12:27 +02:00
|
|
|
}
|
2013-04-12 22:48:34 +02:00
|
|
|
|
2013-04-22 03:24:50 +02:00
|
|
|
if (m->n_fds > 0)
|
|
|
|
append_fds(&d, m->fds, m->n_fds);
|
|
|
|
|
2013-04-12 01:16:40 +02:00
|
|
|
m->kdbus->size = (uint8_t*) d - (uint8_t*) m->kdbus;
|
2013-04-11 23:09:29 +02:00
|
|
|
assert(m->kdbus->size <= sz);
|
|
|
|
|
|
|
|
return 0;
|
2013-05-16 02:04:13 +02:00
|
|
|
|
|
|
|
fail:
|
2013-05-16 16:26:35 +02:00
|
|
|
m->poisoned = true;
|
2013-05-16 02:04:13 +02:00
|
|
|
return r;
|
2013-04-11 23:09:29 +02:00
|
|
|
}
|
|
|
|
|
2014-01-18 20:06:21 +01:00
|
|
|
static int bus_kernel_make_message(sd_bus *bus, struct kdbus_msg *k) {
|
|
|
|
sd_bus_message *m = NULL;
|
|
|
|
struct kdbus_item *d;
|
|
|
|
unsigned n_fds = 0;
|
|
|
|
_cleanup_free_ int *fds = NULL;
|
|
|
|
struct bus_header *h = NULL;
|
|
|
|
size_t total, n_bytes = 0, idx = 0;
|
|
|
|
const char *destination = NULL, *seclabel = NULL;
|
2013-04-11 23:09:29 +02:00
|
|
|
int r;
|
|
|
|
|
2014-01-18 20:06:21 +01:00
|
|
|
assert(bus);
|
|
|
|
assert(k);
|
|
|
|
assert(k->payload_type == KDBUS_PAYLOAD_DBUS);
|
2013-12-10 20:31:10 +01:00
|
|
|
|
2014-01-18 20:06:21 +01:00
|
|
|
KDBUS_ITEM_FOREACH(d, k, items) {
|
|
|
|
size_t l;
|
2013-04-12 03:08:14 +02:00
|
|
|
|
2014-01-18 20:06:21 +01:00
|
|
|
l = d->size - offsetof(struct kdbus_item, data);
|
2013-05-22 16:02:21 +02:00
|
|
|
|
2014-01-18 20:06:21 +01:00
|
|
|
switch (d->type) {
|
2013-05-30 05:35:42 +02:00
|
|
|
|
2014-01-18 20:06:21 +01:00
|
|
|
case KDBUS_ITEM_PAYLOAD_OFF:
|
|
|
|
if (!h) {
|
|
|
|
h = (struct bus_header *)((uint8_t *)k + d->vec.offset);
|
2013-12-24 15:03:32 +01:00
|
|
|
|
2014-01-18 20:06:21 +01:00
|
|
|
if (!bus_header_is_complete(h, d->vec.size))
|
|
|
|
return -EBADMSG;
|
|
|
|
}
|
2013-12-24 15:03:32 +01:00
|
|
|
|
2014-01-18 20:06:21 +01:00
|
|
|
n_bytes += d->vec.size;
|
|
|
|
break;
|
2013-12-24 15:03:32 +01:00
|
|
|
|
2014-01-18 20:06:21 +01:00
|
|
|
case KDBUS_ITEM_PAYLOAD_MEMFD:
|
|
|
|
if (!h)
|
|
|
|
return -EBADMSG;
|
2013-12-24 15:03:32 +01:00
|
|
|
|
2014-01-18 20:06:21 +01:00
|
|
|
n_bytes += d->memfd.size;
|
|
|
|
break;
|
2013-12-24 15:03:32 +01:00
|
|
|
|
2014-01-18 20:06:21 +01:00
|
|
|
case KDBUS_ITEM_FDS: {
|
|
|
|
int *f;
|
|
|
|
unsigned j;
|
2013-12-24 15:03:32 +01:00
|
|
|
|
2014-01-18 20:06:21 +01:00
|
|
|
j = l / sizeof(int);
|
|
|
|
f = realloc(fds, sizeof(int) * (n_fds + j));
|
|
|
|
if (!f)
|
|
|
|
return -ENOMEM;
|
2013-12-24 15:03:32 +01:00
|
|
|
|
2014-01-18 20:06:21 +01:00
|
|
|
fds = f;
|
|
|
|
memcpy(fds + n_fds, d->fds, sizeof(int) * j);
|
|
|
|
n_fds += j;
|
|
|
|
break;
|
|
|
|
}
|
2013-05-30 05:35:42 +02:00
|
|
|
|
2014-01-18 20:06:21 +01:00
|
|
|
case KDBUS_ITEM_SECLABEL:
|
|
|
|
seclabel = d->str;
|
|
|
|
break;
|
2013-05-10 03:36:55 +02:00
|
|
|
}
|
|
|
|
}
|
|
|
|
|
2014-01-18 20:06:21 +01:00
|
|
|
if (!h)
|
|
|
|
return -EBADMSG;
|
2013-04-12 00:43:12 +02:00
|
|
|
|
2014-01-18 20:06:21 +01:00
|
|
|
r = bus_header_message_size(h, &total);
|
|
|
|
if (r < 0)
|
|
|
|
return r;
|
2013-11-29 22:02:43 +01:00
|
|
|
|
2014-01-18 20:06:21 +01:00
|
|
|
if (n_bytes != total)
|
|
|
|
return -EBADMSG;
|
2013-04-11 23:09:29 +02:00
|
|
|
|
2014-01-18 20:06:21 +01:00
|
|
|
/* on kdbus we only speak native endian gvariant, never dbus1
|
|
|
|
* marshalling or reverse endian */
|
|
|
|
if (h->version != 2 ||
|
|
|
|
h->endian != BUS_NATIVE_ENDIAN)
|
|
|
|
return -EPROTOTYPE;
|
2013-11-29 16:24:40 +01:00
|
|
|
|
2014-01-18 20:06:21 +01:00
|
|
|
r = bus_message_from_header(bus, h, sizeof(struct bus_header), fds, n_fds, NULL, seclabel, 0, &m);
|
|
|
|
if (r < 0)
|
|
|
|
return r;
|
2013-04-11 23:09:29 +02:00
|
|
|
|
2014-01-18 20:06:21 +01:00
|
|
|
/* The well-known names list is different from the other
|
|
|
|
credentials. If we asked for it, but nothing is there, this
|
|
|
|
means that the list of well-known names is simply empty, not
|
|
|
|
that we lack any data */
|
2013-12-10 20:31:10 +01:00
|
|
|
|
2014-01-18 20:06:21 +01:00
|
|
|
m->creds.mask |= (SD_BUS_CREDS_UNIQUE_NAME|SD_BUS_CREDS_WELL_KNOWN_NAMES) & bus->creds_mask;
|
2013-04-12 03:08:14 +02:00
|
|
|
|
2014-01-18 20:06:21 +01:00
|
|
|
KDBUS_ITEM_FOREACH(d, k, items) {
|
|
|
|
size_t l;
|
2013-04-11 23:09:29 +02:00
|
|
|
|
2014-01-18 20:06:21 +01:00
|
|
|
l = d->size - offsetof(struct kdbus_item, data);
|
2013-04-11 23:09:29 +02:00
|
|
|
|
2014-01-18 20:06:21 +01:00
|
|
|
switch (d->type) {
|
2013-04-11 23:09:29 +02:00
|
|
|
|
2014-01-18 20:06:21 +01:00
|
|
|
case KDBUS_ITEM_PAYLOAD_OFF: {
|
|
|
|
size_t begin_body;
|
2013-04-11 23:09:29 +02:00
|
|
|
|
2014-01-18 20:06:21 +01:00
|
|
|
begin_body = BUS_MESSAGE_BODY_BEGIN(m);
|
2013-04-11 23:09:29 +02:00
|
|
|
|
2014-01-18 20:06:21 +01:00
|
|
|
if (idx + d->vec.size > begin_body) {
|
|
|
|
struct bus_body_part *part;
|
2013-11-30 01:02:51 +01:00
|
|
|
|
2014-01-18 20:06:21 +01:00
|
|
|
/* Contains body material */
|
2013-04-11 23:09:29 +02:00
|
|
|
|
2014-01-18 20:06:21 +01:00
|
|
|
part = message_append_part(m);
|
|
|
|
if (!part) {
|
|
|
|
r = -ENOMEM;
|
|
|
|
goto fail;
|
|
|
|
}
|
2013-11-30 01:02:51 +01:00
|
|
|
|
2014-01-18 20:06:21 +01:00
|
|
|
/* A -1 offset is NUL padding. */
|
|
|
|
part->is_zero = d->vec.offset == ~0ULL;
|
2013-11-30 01:02:51 +01:00
|
|
|
|
2014-01-18 20:06:21 +01:00
|
|
|
if (idx >= begin_body) {
|
|
|
|
if (!part->is_zero)
|
|
|
|
part->data = (uint8_t *)k + d->vec.offset;
|
|
|
|
part->size = d->vec.size;
|
|
|
|
} else {
|
|
|
|
if (!part->is_zero)
|
|
|
|
part->data = (uint8_t *)k + d->vec.offset + (begin_body - idx);
|
|
|
|
part->size = d->vec.size - (begin_body - idx);
|
|
|
|
}
|
2013-11-30 01:02:51 +01:00
|
|
|
|
2014-01-18 20:06:21 +01:00
|
|
|
part->sealed = true;
|
2013-12-10 21:38:51 +01:00
|
|
|
}
|
2013-11-30 01:02:51 +01:00
|
|
|
|
2014-01-18 20:06:21 +01:00
|
|
|
idx += d->vec.size;
|
|
|
|
break;
|
|
|
|
}
|
2013-11-30 01:02:51 +01:00
|
|
|
|
2014-01-18 20:06:21 +01:00
|
|
|
case KDBUS_ITEM_PAYLOAD_MEMFD: {
|
|
|
|
struct bus_body_part *part;
|
2013-11-30 01:02:51 +01:00
|
|
|
|
2014-01-18 20:06:21 +01:00
|
|
|
if (idx < BUS_MESSAGE_BODY_BEGIN(m)) {
|
|
|
|
r = -EBADMSG;
|
|
|
|
goto fail;
|
2013-12-10 21:38:51 +01:00
|
|
|
}
|
2013-11-30 01:02:51 +01:00
|
|
|
|
2014-01-18 20:06:21 +01:00
|
|
|
part = message_append_part(m);
|
|
|
|
if (!part) {
|
|
|
|
r = -ENOMEM;
|
|
|
|
goto fail;
|
|
|
|
}
|
2013-11-30 01:02:51 +01:00
|
|
|
|
2014-01-18 20:06:21 +01:00
|
|
|
part->memfd = d->memfd.fd;
|
|
|
|
part->size = d->memfd.size;
|
|
|
|
part->sealed = true;
|
2013-11-30 01:02:51 +01:00
|
|
|
|
2014-01-18 20:06:21 +01:00
|
|
|
idx += d->memfd.size;
|
|
|
|
break;
|
|
|
|
}
|
2013-11-30 01:02:51 +01:00
|
|
|
|
2014-01-18 20:06:21 +01:00
|
|
|
case KDBUS_ITEM_CREDS:
|
|
|
|
/* UID/GID/PID are always valid */
|
|
|
|
m->creds.uid = (uid_t) d->creds.uid;
|
|
|
|
m->creds.gid = (gid_t) d->creds.gid;
|
|
|
|
m->creds.pid = (pid_t) d->creds.pid;
|
|
|
|
m->creds.mask |= (SD_BUS_CREDS_UID|SD_BUS_CREDS_GID|SD_BUS_CREDS_PID) & bus->creds_mask;
|
2013-11-30 01:02:51 +01:00
|
|
|
|
2014-01-18 20:06:21 +01:00
|
|
|
/* The PID starttime/TID might be missing
|
|
|
|
* however, when the data is faked by some
|
|
|
|
* data bus proxy and it lacks that
|
|
|
|
* information about the real client since
|
|
|
|
* SO_PEERCRED is used for that */
|
2013-04-11 23:09:29 +02:00
|
|
|
|
2014-01-18 20:06:21 +01:00
|
|
|
if (d->creds.starttime > 0) {
|
|
|
|
m->creds.pid_starttime = d->creds.starttime / NSEC_PER_USEC;
|
|
|
|
m->creds.mask |= SD_BUS_CREDS_PID_STARTTIME & bus->creds_mask;
|
|
|
|
}
|
2013-04-11 23:09:29 +02:00
|
|
|
|
2014-01-18 20:06:21 +01:00
|
|
|
if (d->creds.tid > 0) {
|
|
|
|
m->creds.tid = (pid_t) d->creds.tid;
|
|
|
|
m->creds.mask |= SD_BUS_CREDS_TID & bus->creds_mask;
|
|
|
|
}
|
|
|
|
break;
|
2013-04-11 23:09:29 +02:00
|
|
|
|
2014-01-18 20:06:21 +01:00
|
|
|
case KDBUS_ITEM_TIMESTAMP:
|
2014-01-22 16:44:32 +01:00
|
|
|
|
|
|
|
if (bus->attach_flags & KDBUS_ATTACH_TIMESTAMP) {
|
|
|
|
m->realtime = d->timestamp.realtime_ns / NSEC_PER_USEC;
|
|
|
|
m->monotonic = d->timestamp.monotonic_ns / NSEC_PER_USEC;
|
|
|
|
m->seqnum = d->timestamp.seqnum;
|
|
|
|
}
|
|
|
|
|
2014-01-18 20:06:21 +01:00
|
|
|
break;
|
2013-05-10 03:36:55 +02:00
|
|
|
|
2014-01-18 20:06:21 +01:00
|
|
|
case KDBUS_ITEM_PID_COMM:
|
|
|
|
m->creds.comm = d->str;
|
|
|
|
m->creds.mask |= SD_BUS_CREDS_COMM & bus->creds_mask;
|
|
|
|
break;
|
2013-05-10 03:36:55 +02:00
|
|
|
|
2014-01-18 20:06:21 +01:00
|
|
|
case KDBUS_ITEM_TID_COMM:
|
|
|
|
m->creds.tid_comm = d->str;
|
|
|
|
m->creds.mask |= SD_BUS_CREDS_TID_COMM & bus->creds_mask;
|
|
|
|
break;
|
2013-04-11 23:09:29 +02:00
|
|
|
|
2014-01-18 20:06:21 +01:00
|
|
|
case KDBUS_ITEM_EXE:
|
|
|
|
m->creds.exe = d->str;
|
|
|
|
m->creds.mask |= SD_BUS_CREDS_EXE & bus->creds_mask;
|
|
|
|
break;
|
2013-04-11 23:09:29 +02:00
|
|
|
|
2014-01-18 20:06:21 +01:00
|
|
|
case KDBUS_ITEM_CMDLINE:
|
|
|
|
m->creds.cmdline = d->str;
|
|
|
|
m->creds.cmdline_size = l;
|
|
|
|
m->creds.mask |= SD_BUS_CREDS_CMDLINE & bus->creds_mask;
|
|
|
|
break;
|
2013-11-29 20:07:56 +01:00
|
|
|
|
2014-01-18 20:06:21 +01:00
|
|
|
case KDBUS_ITEM_CGROUP:
|
|
|
|
m->creds.cgroup = d->str;
|
|
|
|
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;
|
2013-11-29 20:07:56 +01:00
|
|
|
|
2014-01-18 20:06:21 +01:00
|
|
|
if (!bus->cgroup_root) {
|
|
|
|
r = cg_get_root_path(&bus->cgroup_root);
|
|
|
|
if (r < 0)
|
|
|
|
goto fail;
|
|
|
|
}
|
2013-11-29 20:07:56 +01:00
|
|
|
|
2014-01-18 20:06:21 +01:00
|
|
|
m->creds.cgroup_root = bus->cgroup_root;
|
2013-11-29 20:07:56 +01:00
|
|
|
|
2014-01-18 20:06:21 +01:00
|
|
|
break;
|
2013-11-29 20:07:56 +01:00
|
|
|
|
2014-01-18 20:06:21 +01:00
|
|
|
case KDBUS_ITEM_AUDIT:
|
|
|
|
m->creds.audit_session_id = (uint32_t) d->audit.sessionid;
|
|
|
|
m->creds.audit_login_uid = (uid_t) d->audit.loginuid;
|
|
|
|
m->creds.mask |= (SD_BUS_CREDS_AUDIT_SESSION_ID|SD_BUS_CREDS_AUDIT_LOGIN_UID) & bus->creds_mask;
|
|
|
|
break;
|
2013-11-29 20:07:56 +01:00
|
|
|
|
2014-01-18 20:06:21 +01:00
|
|
|
case KDBUS_ITEM_CAPS:
|
|
|
|
m->creds.capability = d->data;
|
|
|
|
m->creds.capability_size = l;
|
|
|
|
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;
|
|
|
|
break;
|
2013-11-29 22:02:43 +01:00
|
|
|
|
2014-01-18 20:06:21 +01:00
|
|
|
case KDBUS_ITEM_DST_NAME:
|
|
|
|
if (!service_name_is_valid(d->str))
|
|
|
|
return -EBADMSG;
|
2013-11-29 22:02:43 +01:00
|
|
|
|
2014-01-18 20:06:21 +01:00
|
|
|
destination = d->str;
|
|
|
|
break;
|
2013-11-29 20:07:56 +01:00
|
|
|
|
2014-01-18 20:06:21 +01:00
|
|
|
case KDBUS_ITEM_NAME:
|
|
|
|
if (!service_name_is_valid(d->name.name))
|
|
|
|
return -EBADMSG;
|
2013-11-29 20:07:56 +01:00
|
|
|
|
2014-01-18 20:06:21 +01:00
|
|
|
r = strv_extend(&m->creds.well_known_names, d->name.name);
|
|
|
|
if (r < 0)
|
|
|
|
goto fail;
|
|
|
|
break;
|
2013-11-29 20:07:56 +01:00
|
|
|
|
2014-01-22 16:28:58 +01:00
|
|
|
case KDBUS_ITEM_CONN_NAME:
|
|
|
|
m->creds.conn_name = d->str;
|
|
|
|
m->creds.mask |= SD_BUS_CREDS_CONNECTION_NAME & bus->creds_mask;
|
|
|
|
break;
|
|
|
|
|
2014-01-18 20:06:21 +01:00
|
|
|
case KDBUS_ITEM_FDS:
|
|
|
|
case KDBUS_ITEM_SECLABEL:
|
|
|
|
break;
|
2013-12-12 01:42:41 +01:00
|
|
|
|
2014-01-18 20:06:21 +01:00
|
|
|
default:
|
|
|
|
log_debug("Got unknown field from kernel %llu", d->type);
|
|
|
|
}
|
|
|
|
}
|
2013-12-12 01:42:41 +01:00
|
|
|
|
2014-01-18 20:06:21 +01:00
|
|
|
r = bus_message_parse_fields(m);
|
|
|
|
if (r < 0)
|
|
|
|
goto fail;
|
2013-11-29 20:07:56 +01:00
|
|
|
|
2014-01-18 20:06:21 +01:00
|
|
|
/* Override information from the user header with data from the kernel */
|
|
|
|
if (k->src_id == KDBUS_SRC_ID_KERNEL)
|
|
|
|
m->sender = m->creds.unique_name = (char*) "org.freedesktop.DBus";
|
|
|
|
else {
|
|
|
|
snprintf(m->sender_buffer, sizeof(m->sender_buffer), ":1.%llu", (unsigned long long) k->src_id);
|
|
|
|
m->sender = m->creds.unique_name = m->sender_buffer;
|
|
|
|
}
|
2013-11-29 20:07:56 +01:00
|
|
|
|
2014-01-18 20:06:21 +01:00
|
|
|
if (destination)
|
|
|
|
m->destination = destination;
|
|
|
|
else if (k->dst_id == KDBUS_DST_ID_BROADCAST)
|
|
|
|
m->destination = NULL;
|
|
|
|
else if (k->dst_id == KDBUS_DST_ID_NAME)
|
|
|
|
m->destination = bus->unique_name; /* fill in unique name if the well-known name is missing */
|
|
|
|
else {
|
|
|
|
snprintf(m->destination_buffer, sizeof(m->destination_buffer), ":1.%llu", (unsigned long long) k->dst_id);
|
|
|
|
m->destination = m->destination_buffer;
|
|
|
|
}
|
2013-11-29 20:07:56 +01:00
|
|
|
|
2014-01-18 20:06:21 +01:00
|
|
|
/* We take possession of the kmsg struct now */
|
|
|
|
m->kdbus = k;
|
|
|
|
m->release_kdbus = true;
|
|
|
|
m->free_fds = true;
|
|
|
|
fds = NULL;
|
2013-11-29 20:07:56 +01:00
|
|
|
|
2014-01-18 20:06:21 +01:00
|
|
|
bus->rqueue[bus->rqueue_size++] = m;
|
2013-11-29 20:07:56 +01:00
|
|
|
|
2014-01-18 20:06:21 +01:00
|
|
|
return 1;
|
2013-11-29 20:07:56 +01:00
|
|
|
|
2014-01-18 20:06:21 +01:00
|
|
|
fail:
|
|
|
|
if (m) {
|
|
|
|
struct bus_body_part *part;
|
|
|
|
unsigned i;
|
2013-11-29 20:07:56 +01:00
|
|
|
|
2014-01-18 20:06:21 +01:00
|
|
|
/* Make sure the memfds are not freed twice */
|
|
|
|
MESSAGE_FOREACH_PART(part, i, m)
|
|
|
|
if (part->memfd >= 0)
|
|
|
|
part->memfd = -1;
|
2013-11-29 20:07:56 +01:00
|
|
|
|
2014-01-18 20:06:21 +01:00
|
|
|
sd_bus_message_unref(m);
|
|
|
|
}
|
2013-11-29 20:07:56 +01:00
|
|
|
|
2014-01-18 20:06:21 +01:00
|
|
|
return r;
|
|
|
|
}
|
2013-11-29 20:07:56 +01:00
|
|
|
|
2014-01-18 20:06:21 +01:00
|
|
|
int bus_kernel_take_fd(sd_bus *b) {
|
|
|
|
struct kdbus_cmd_hello *hello;
|
|
|
|
struct kdbus_item *item;
|
2014-01-22 16:09:59 +01:00
|
|
|
_cleanup_free_ char *g = NULL;
|
|
|
|
const char *name;
|
|
|
|
size_t l = 0, m = 0, sz;
|
2014-01-18 20:06:21 +01:00
|
|
|
int r;
|
2013-11-29 20:07:56 +01:00
|
|
|
|
2014-01-18 20:06:21 +01:00
|
|
|
assert(b);
|
2013-11-30 00:19:01 +01:00
|
|
|
|
2014-01-18 20:06:21 +01:00
|
|
|
if (b->is_server)
|
|
|
|
return -EINVAL;
|
2013-11-29 20:07:56 +01:00
|
|
|
|
2014-01-18 20:06:21 +01:00
|
|
|
b->use_memfd = 1;
|
2013-11-29 20:07:56 +01:00
|
|
|
|
2014-01-22 16:09:59 +01:00
|
|
|
if (b->connection_name) {
|
2014-03-11 19:03:50 +01:00
|
|
|
g = bus_label_escape(b->connection_name);
|
2014-01-22 16:09:59 +01:00
|
|
|
if (!g)
|
|
|
|
return -ENOMEM;
|
|
|
|
|
|
|
|
name = g;
|
|
|
|
} else {
|
|
|
|
char pr[17] = {};
|
|
|
|
|
|
|
|
/* If no name is explicitly set, we'll include a hint
|
|
|
|
* indicating the library implementation, a hint which
|
|
|
|
* kind of bus this is and the thread name */
|
|
|
|
|
|
|
|
assert_se(prctl(PR_GET_NAME, (unsigned long) pr) >= 0);
|
|
|
|
|
|
|
|
if (isempty(pr)) {
|
|
|
|
name = b->is_system ? "sd-system" :
|
|
|
|
b->is_user ? "sd-user" : "sd";
|
|
|
|
} else {
|
|
|
|
_cleanup_free_ char *e = NULL;
|
|
|
|
|
2014-03-11 19:03:50 +01:00
|
|
|
e = bus_label_escape(pr);
|
2014-01-22 16:09:59 +01:00
|
|
|
if (!e)
|
|
|
|
return -ENOMEM;
|
|
|
|
|
|
|
|
g = strappend(b->is_system ? "sd-system-" :
|
|
|
|
b->is_user ? "sd-user-" : "sd-",
|
|
|
|
e);
|
|
|
|
if (!g)
|
|
|
|
return -ENOMEM;
|
|
|
|
|
|
|
|
name = g;
|
|
|
|
}
|
|
|
|
|
2014-03-11 19:03:50 +01:00
|
|
|
b->connection_name = bus_label_unescape(name);
|
2014-01-22 16:09:59 +01:00
|
|
|
if (!b->connection_name)
|
|
|
|
return -ENOMEM;
|
|
|
|
}
|
|
|
|
|
|
|
|
m = strlen(name);
|
|
|
|
|
|
|
|
sz = ALIGN8(offsetof(struct kdbus_cmd_hello, items)) +
|
|
|
|
ALIGN8(offsetof(struct kdbus_item, str) + m + 1);
|
2013-11-29 20:07:56 +01:00
|
|
|
|
2014-01-18 20:06:21 +01:00
|
|
|
if (b->fake_creds_valid)
|
2014-01-22 16:09:59 +01:00
|
|
|
sz += ALIGN8(offsetof(struct kdbus_item, creds) + sizeof(struct kdbus_creds));
|
2013-11-29 20:07:56 +01:00
|
|
|
|
2014-01-18 20:06:21 +01:00
|
|
|
if (b->fake_label) {
|
|
|
|
l = strlen(b->fake_label);
|
|
|
|
sz += ALIGN8(offsetof(struct kdbus_item, str) + l + 1);
|
|
|
|
}
|
2013-11-29 20:07:56 +01:00
|
|
|
|
2014-01-18 20:06:21 +01:00
|
|
|
hello = alloca0(sz);
|
|
|
|
hello->size = sz;
|
|
|
|
hello->conn_flags = b->hello_flags;
|
|
|
|
hello->attach_flags = b->attach_flags;
|
|
|
|
hello->pool_size = KDBUS_POOL_SIZE;
|
2013-11-29 20:07:56 +01:00
|
|
|
|
2014-01-18 20:06:21 +01:00
|
|
|
item = hello->items;
|
|
|
|
|
2014-01-22 16:09:59 +01:00
|
|
|
item->size = offsetof(struct kdbus_item, str) + m + 1;
|
|
|
|
item->type = KDBUS_ITEM_CONN_NAME;
|
|
|
|
memcpy(item->str, name, m + 1);
|
|
|
|
item = KDBUS_ITEM_NEXT(item);
|
|
|
|
|
2014-01-18 20:06:21 +01:00
|
|
|
if (b->fake_creds_valid) {
|
|
|
|
item->size = offsetof(struct kdbus_item, creds) + sizeof(struct kdbus_creds);
|
|
|
|
item->type = KDBUS_ITEM_CREDS;
|
|
|
|
item->creds = b->fake_creds;
|
|
|
|
|
|
|
|
item = KDBUS_ITEM_NEXT(item);
|
2013-11-29 20:07:56 +01:00
|
|
|
}
|
|
|
|
|
2014-01-18 20:06:21 +01:00
|
|
|
if (b->fake_label) {
|
|
|
|
item->size = offsetof(struct kdbus_item, str) + l + 1;
|
2014-01-22 16:09:59 +01:00
|
|
|
item->type = KDBUS_ITEM_SECLABEL;
|
2014-01-18 20:06:21 +01:00
|
|
|
memcpy(item->str, b->fake_label, l+1);
|
2013-11-29 20:07:56 +01:00
|
|
|
}
|
|
|
|
|
2014-01-18 20:06:21 +01:00
|
|
|
r = ioctl(b->input_fd, KDBUS_CMD_HELLO, hello);
|
|
|
|
if (r < 0)
|
|
|
|
return -errno;
|
2013-11-29 20:07:56 +01:00
|
|
|
|
2014-01-18 20:06:21 +01:00
|
|
|
if (!b->kdbus_buffer) {
|
|
|
|
b->kdbus_buffer = mmap(NULL, KDBUS_POOL_SIZE, PROT_READ, MAP_SHARED, b->input_fd, 0);
|
|
|
|
if (b->kdbus_buffer == MAP_FAILED) {
|
|
|
|
b->kdbus_buffer = NULL;
|
|
|
|
return -errno;
|
|
|
|
}
|
|
|
|
}
|
2013-04-11 23:09:29 +02:00
|
|
|
|
2014-01-18 20:06:21 +01:00
|
|
|
/* The higher 32bit of both flags fields are considered
|
|
|
|
* 'incompatible flags'. Refuse them all for now. */
|
|
|
|
if (hello->bus_flags > 0xFFFFFFFFULL ||
|
|
|
|
hello->conn_flags > 0xFFFFFFFFULL)
|
|
|
|
return -ENOTSUP;
|
2013-04-11 23:09:29 +02:00
|
|
|
|
2014-01-28 00:57:38 +01:00
|
|
|
if (!bloom_validate_parameters((size_t) hello->bloom.size, (unsigned) hello->bloom.n_hash))
|
2014-01-18 20:06:21 +01:00
|
|
|
return -ENOTSUP;
|
2013-04-11 23:09:29 +02:00
|
|
|
|
2014-01-28 00:57:38 +01:00
|
|
|
b->bloom_size = (size_t) hello->bloom.size;
|
|
|
|
b->bloom_n_hash = (unsigned) hello->bloom.n_hash;
|
|
|
|
|
2014-01-18 20:06:21 +01:00
|
|
|
if (asprintf(&b->unique_name, ":1.%llu", (unsigned long long) hello->id) < 0)
|
|
|
|
return -ENOMEM;
|
2013-04-11 23:09:29 +02:00
|
|
|
|
2014-01-18 20:06:21 +01:00
|
|
|
b->unique_id = hello->id;
|
2013-04-11 23:09:29 +02:00
|
|
|
|
2014-01-18 20:06:21 +01:00
|
|
|
b->is_kernel = true;
|
|
|
|
b->bus_client = true;
|
|
|
|
b->can_fds = !!(hello->conn_flags & KDBUS_HELLO_ACCEPT_FD);
|
|
|
|
b->message_version = 2;
|
|
|
|
b->message_endian = BUS_NATIVE_ENDIAN;
|
2013-05-15 02:56:45 +02:00
|
|
|
|
2014-01-18 20:06:21 +01:00
|
|
|
/* the kernel told us the UUID of the underlying bus */
|
|
|
|
memcpy(b->server_id.bytes, hello->id128, sizeof(b->server_id.bytes));
|
2013-04-11 23:09:29 +02:00
|
|
|
|
2014-01-18 20:06:21 +01:00
|
|
|
return bus_start_running(b);
|
|
|
|
}
|
2013-04-11 23:09:29 +02:00
|
|
|
|
2014-01-18 20:06:21 +01:00
|
|
|
int bus_kernel_connect(sd_bus *b) {
|
|
|
|
assert(b);
|
|
|
|
assert(b->input_fd < 0);
|
|
|
|
assert(b->output_fd < 0);
|
|
|
|
assert(b->kernel);
|
2013-05-16 02:37:42 +02:00
|
|
|
|
2014-01-18 20:06:21 +01:00
|
|
|
if (b->is_server)
|
|
|
|
return -EINVAL;
|
2013-05-16 02:37:42 +02:00
|
|
|
|
2014-01-18 20:06:21 +01:00
|
|
|
b->input_fd = open(b->kernel, O_RDWR|O_NOCTTY|O_CLOEXEC);
|
|
|
|
if (b->input_fd < 0)
|
|
|
|
return -errno;
|
2013-04-11 23:09:29 +02:00
|
|
|
|
2014-01-18 20:06:21 +01:00
|
|
|
b->output_fd = b->input_fd;
|
2013-04-11 23:09:29 +02:00
|
|
|
|
2014-01-18 20:06:21 +01:00
|
|
|
return bus_kernel_take_fd(b);
|
|
|
|
}
|
2013-04-12 01:45:18 +02:00
|
|
|
|
2014-01-21 15:02:07 +01:00
|
|
|
static void close_kdbus_msg(sd_bus *bus, struct kdbus_msg *k) {
|
|
|
|
uint64_t off;
|
|
|
|
struct kdbus_item *d;
|
|
|
|
|
|
|
|
assert(bus);
|
|
|
|
assert(k);
|
|
|
|
|
|
|
|
off = (uint8_t *)k - (uint8_t *)bus->kdbus_buffer;
|
|
|
|
ioctl(bus->input_fd, KDBUS_CMD_FREE, &off);
|
|
|
|
|
|
|
|
KDBUS_ITEM_FOREACH(d, k, items) {
|
|
|
|
|
|
|
|
if (d->type == KDBUS_ITEM_FDS)
|
|
|
|
close_many(d->fds, (d->size - offsetof(struct kdbus_item, fds)) / sizeof(int));
|
|
|
|
else if (d->type == KDBUS_ITEM_PAYLOAD_MEMFD)
|
|
|
|
close_nointr_nofail(d->memfd.fd);
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
int bus_kernel_write_message(sd_bus *bus, sd_bus_message *m, bool hint_sync_call) {
|
2014-01-18 20:06:21 +01:00
|
|
|
int r;
|
2013-04-11 23:09:29 +02:00
|
|
|
|
2014-01-18 20:06:21 +01:00
|
|
|
assert(bus);
|
|
|
|
assert(m);
|
|
|
|
assert(bus->state == BUS_RUNNING);
|
2013-04-11 23:09:29 +02:00
|
|
|
|
2014-01-18 20:06:21 +01:00
|
|
|
/* If we can't deliver, we want room for the error message */
|
|
|
|
r = bus_rqueue_make_room(bus);
|
2013-04-11 23:09:29 +02:00
|
|
|
if (r < 0)
|
|
|
|
return r;
|
|
|
|
|
2014-01-18 20:06:21 +01:00
|
|
|
r = bus_message_setup_kmsg(bus, m);
|
2013-04-11 23:09:29 +02:00
|
|
|
if (r < 0)
|
|
|
|
return r;
|
|
|
|
|
2014-01-21 15:02:07 +01:00
|
|
|
/* If this is a synchronous method call, then let's tell the
|
|
|
|
* kernel, so that it can pass CPU time/scheduling to the
|
|
|
|
* destination for the time, if it wants to. If we
|
|
|
|
* synchronously wait for the result anyway, we won't need CPU
|
|
|
|
* anyway. */
|
|
|
|
if (hint_sync_call)
|
|
|
|
m->kdbus->flags |= KDBUS_MSG_FLAGS_EXPECT_REPLY|KDBUS_MSG_FLAGS_SYNC_REPLY;
|
|
|
|
|
2014-01-18 20:06:21 +01:00
|
|
|
r = ioctl(bus->output_fd, KDBUS_CMD_MSG_SEND, m->kdbus);
|
|
|
|
if (r < 0) {
|
|
|
|
_cleanup_bus_error_free_ sd_bus_error error = SD_BUS_ERROR_NULL;
|
|
|
|
sd_bus_message *reply;
|
2013-12-21 03:16:39 +01:00
|
|
|
|
2014-01-18 20:06:21 +01:00
|
|
|
if (errno == EAGAIN || errno == EINTR)
|
|
|
|
return 0;
|
|
|
|
else if (errno == ENXIO || errno == ESRCH) {
|
2013-04-11 23:09:29 +02:00
|
|
|
|
2014-01-18 20:06:21 +01:00
|
|
|
/* ENXIO: unique name not known
|
|
|
|
* ESRCH: well-known name not known */
|
2013-04-11 23:09:29 +02:00
|
|
|
|
2014-01-18 20:06:21 +01:00
|
|
|
if (m->header->type == SD_BUS_MESSAGE_METHOD_CALL)
|
|
|
|
sd_bus_error_setf(&error, SD_BUS_ERROR_SERVICE_UNKNOWN, "Destination %s not known", m->destination);
|
|
|
|
else {
|
|
|
|
log_debug("Could not deliver message to %s as destination is not known. Ignoring.", m->destination);
|
|
|
|
return 0;
|
|
|
|
}
|
2013-11-29 20:07:56 +01:00
|
|
|
|
2014-01-18 20:06:21 +01:00
|
|
|
} else if (errno == EADDRNOTAVAIL) {
|
2013-05-10 03:36:55 +02:00
|
|
|
|
2014-01-18 20:06:21 +01:00
|
|
|
/* EADDRNOTAVAIL: activation is possible, but turned off in request flags */
|
2013-05-14 22:24:26 +02:00
|
|
|
|
2014-01-18 20:06:21 +01:00
|
|
|
if (m->header->type == SD_BUS_MESSAGE_METHOD_CALL)
|
|
|
|
sd_bus_error_setf(&error, SD_BUS_ERROR_SERVICE_UNKNOWN, "Activation of %s not requested", m->destination);
|
|
|
|
else {
|
|
|
|
log_debug("Could not deliver message to %s as destination is not activated. Ignoring.", m->destination);
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
} else
|
|
|
|
return -errno;
|
2013-05-14 22:24:26 +02:00
|
|
|
|
2014-01-18 20:06:21 +01:00
|
|
|
r = bus_message_new_synthetic_error(
|
|
|
|
bus,
|
|
|
|
BUS_MESSAGE_COOKIE(m),
|
|
|
|
&error,
|
|
|
|
&reply);
|
2013-05-14 22:24:26 +02:00
|
|
|
|
2014-01-18 20:06:21 +01:00
|
|
|
if (r < 0)
|
|
|
|
return r;
|
2013-05-14 22:24:26 +02:00
|
|
|
|
2014-01-18 20:06:21 +01:00
|
|
|
r = bus_seal_synthetic_message(bus, reply);
|
|
|
|
if (r < 0)
|
|
|
|
return r;
|
2013-05-30 05:35:42 +02:00
|
|
|
|
2014-01-18 20:06:21 +01:00
|
|
|
bus->rqueue[bus->rqueue_size++] = reply;
|
2013-05-14 22:24:26 +02:00
|
|
|
|
2014-01-21 15:02:07 +01:00
|
|
|
} else if (hint_sync_call) {
|
|
|
|
struct kdbus_msg *k;
|
2013-05-10 03:36:55 +02:00
|
|
|
|
2014-01-21 15:02:07 +01:00
|
|
|
k = (struct kdbus_msg *)((uint8_t *)bus->kdbus_buffer + m->kdbus->offset_reply);
|
|
|
|
assert(k);
|
2013-11-29 20:07:56 +01:00
|
|
|
|
2014-01-21 15:02:07 +01:00
|
|
|
if (k->payload_type == KDBUS_PAYLOAD_DBUS) {
|
2013-05-16 02:37:42 +02:00
|
|
|
|
2014-01-21 15:02:07 +01:00
|
|
|
r = bus_kernel_make_message(bus, k);
|
|
|
|
if (r < 0) {
|
|
|
|
close_kdbus_msg(bus, k);
|
2013-05-16 02:37:42 +02:00
|
|
|
|
2014-01-21 15:02:07 +01:00
|
|
|
/* Anybody can send us invalid messages, let's just drop them. */
|
|
|
|
if (r == -EBADMSG || r == -EPROTOTYPE)
|
|
|
|
log_debug("Ignoring invalid message: %s", strerror(-r));
|
|
|
|
else
|
|
|
|
return r;
|
|
|
|
}
|
|
|
|
} else {
|
|
|
|
log_debug("Ignoring message with unknown payload type %llu.", (unsigned long long) k->payload_type);
|
|
|
|
close_kdbus_msg(bus, k);
|
|
|
|
}
|
2014-01-18 20:06:21 +01:00
|
|
|
}
|
2014-01-21 15:02:07 +01:00
|
|
|
|
|
|
|
return 1;
|
2014-01-18 20:06:21 +01:00
|
|
|
}
|
2013-04-13 21:53:11 +02:00
|
|
|
|
2014-01-18 20:06:21 +01:00
|
|
|
static int push_name_owner_changed(sd_bus *bus, const char *name, const char *old_owner, const char *new_owner) {
|
|
|
|
_cleanup_bus_message_unref_ sd_bus_message *m = NULL;
|
|
|
|
int r;
|
2013-12-24 16:20:47 +01:00
|
|
|
|
2014-01-18 20:06:21 +01:00
|
|
|
assert(bus);
|
2013-12-24 16:20:47 +01:00
|
|
|
|
2014-01-18 20:06:21 +01:00
|
|
|
r = sd_bus_message_new_signal(
|
|
|
|
bus,
|
2014-02-19 23:54:58 +01:00
|
|
|
&m,
|
2014-01-18 20:06:21 +01:00
|
|
|
"/org/freedesktop/DBus",
|
|
|
|
"org.freedesktop.DBus",
|
2014-02-19 23:54:58 +01:00
|
|
|
"NameOwnerChanged");
|
2014-01-18 20:06:21 +01:00
|
|
|
if (r < 0)
|
|
|
|
return r;
|
2013-12-24 16:20:47 +01:00
|
|
|
|
2014-01-18 20:06:21 +01:00
|
|
|
r = sd_bus_message_append(m, "sss", name, old_owner, new_owner);
|
|
|
|
if (r < 0)
|
|
|
|
return r;
|
2013-11-28 17:50:02 +01:00
|
|
|
|
2014-01-18 20:06:21 +01:00
|
|
|
m->sender = "org.freedesktop.DBus";
|
2013-11-28 17:50:02 +01:00
|
|
|
|
2014-01-18 20:06:21 +01:00
|
|
|
r = bus_seal_synthetic_message(bus, m);
|
|
|
|
if (r < 0)
|
|
|
|
return r;
|
2013-11-28 17:50:02 +01:00
|
|
|
|
2014-01-18 20:06:21 +01:00
|
|
|
bus->rqueue[bus->rqueue_size++] = m;
|
|
|
|
m = NULL;
|
2013-11-28 17:50:02 +01:00
|
|
|
|
2014-01-18 20:06:21 +01:00
|
|
|
return 1;
|
|
|
|
}
|
2013-11-28 17:50:02 +01:00
|
|
|
|
2014-01-18 20:06:21 +01:00
|
|
|
static int translate_name_change(sd_bus *bus, struct kdbus_msg *k, struct kdbus_item *d) {
|
|
|
|
char new_owner[UNIQUE_NAME_MAX], old_owner[UNIQUE_NAME_MAX];
|
2013-11-28 17:50:02 +01:00
|
|
|
|
2014-01-18 20:06:21 +01:00
|
|
|
assert(bus);
|
|
|
|
assert(k);
|
|
|
|
assert(d);
|
2013-12-24 19:31:44 +01:00
|
|
|
|
2014-01-18 20:06:21 +01:00
|
|
|
if (d->type == KDBUS_ITEM_NAME_ADD || (d->name_change.old.flags & (KDBUS_NAME_IN_QUEUE|KDBUS_NAME_ACTIVATOR)))
|
|
|
|
old_owner[0] = 0;
|
|
|
|
else
|
|
|
|
sprintf(old_owner, ":1.%llu", (unsigned long long) d->name_change.old.id);
|
2013-12-24 19:31:44 +01:00
|
|
|
|
2014-01-18 20:06:21 +01:00
|
|
|
if (d->type == KDBUS_ITEM_NAME_REMOVE || (d->name_change.new.flags & (KDBUS_NAME_IN_QUEUE|KDBUS_NAME_ACTIVATOR))) {
|
2013-12-24 19:31:44 +01:00
|
|
|
|
2014-01-18 20:06:21 +01:00
|
|
|
if (isempty(old_owner))
|
|
|
|
return 0;
|
2013-11-28 17:50:02 +01:00
|
|
|
|
2014-01-18 20:06:21 +01:00
|
|
|
new_owner[0] = 0;
|
|
|
|
} else
|
|
|
|
sprintf(new_owner, ":1.%llu", (unsigned long long) d->name_change.new.id);
|
2013-11-28 17:50:02 +01:00
|
|
|
|
2014-01-18 20:06:21 +01:00
|
|
|
return push_name_owner_changed(bus, d->name_change.name, old_owner, new_owner);
|
|
|
|
}
|
2013-11-28 17:50:02 +01:00
|
|
|
|
2014-01-18 20:06:21 +01:00
|
|
|
static int translate_id_change(sd_bus *bus, struct kdbus_msg *k, struct kdbus_item *d) {
|
|
|
|
char owner[UNIQUE_NAME_MAX];
|
2013-12-27 00:27:43 +01:00
|
|
|
|
2014-01-18 20:06:21 +01:00
|
|
|
assert(bus);
|
|
|
|
assert(k);
|
|
|
|
assert(d);
|
2013-11-29 20:07:56 +01:00
|
|
|
|
2014-01-18 20:06:21 +01:00
|
|
|
sprintf(owner, ":1.%llu", d->id_change.id);
|
2013-12-27 00:27:43 +01:00
|
|
|
|
2014-01-18 20:06:21 +01:00
|
|
|
return push_name_owner_changed(
|
|
|
|
bus, owner,
|
|
|
|
d->type == KDBUS_ITEM_ID_ADD ? NULL : owner,
|
|
|
|
d->type == KDBUS_ITEM_ID_ADD ? owner : NULL);
|
|
|
|
}
|
2013-11-30 04:14:10 +01:00
|
|
|
|
2014-01-18 20:06:21 +01:00
|
|
|
static int translate_reply(sd_bus *bus, struct kdbus_msg *k, struct kdbus_item *d) {
|
|
|
|
_cleanup_bus_message_unref_ sd_bus_message *m = NULL;
|
|
|
|
int r;
|
2013-11-29 20:07:56 +01:00
|
|
|
|
2014-01-18 20:06:21 +01:00
|
|
|
assert(bus);
|
|
|
|
assert(k);
|
|
|
|
assert(d);
|
2013-04-12 01:57:53 +02:00
|
|
|
|
2014-01-18 20:06:21 +01:00
|
|
|
r = bus_message_new_synthetic_error(
|
|
|
|
bus,
|
|
|
|
k->cookie_reply,
|
|
|
|
d->type == KDBUS_ITEM_REPLY_TIMEOUT ?
|
|
|
|
&SD_BUS_ERROR_MAKE_CONST(SD_BUS_ERROR_NO_REPLY, "Method call timed out") :
|
|
|
|
&SD_BUS_ERROR_MAKE_CONST(SD_BUS_ERROR_NO_REPLY, "Method call peer died"),
|
|
|
|
&m);
|
2013-05-16 02:37:42 +02:00
|
|
|
if (r < 0)
|
2014-01-18 20:06:21 +01:00
|
|
|
return r;
|
2013-04-12 20:17:00 +02:00
|
|
|
|
2014-01-18 20:06:21 +01:00
|
|
|
m->sender = "org.freedesktop.DBus";
|
2013-04-12 20:17:00 +02:00
|
|
|
|
2014-01-18 20:06:21 +01:00
|
|
|
r = bus_seal_synthetic_message(bus, m);
|
|
|
|
if (r < 0)
|
|
|
|
return r;
|
2013-04-11 23:09:29 +02:00
|
|
|
|
2013-11-30 00:19:01 +01:00
|
|
|
bus->rqueue[bus->rqueue_size++] = m;
|
2014-01-18 20:06:21 +01:00
|
|
|
m = NULL;
|
2013-11-29 21:29:16 +01:00
|
|
|
|
2013-04-11 23:09:29 +02:00
|
|
|
return 1;
|
2014-01-18 20:06:21 +01:00
|
|
|
}
|
2013-05-16 02:37:42 +02:00
|
|
|
|
2014-01-18 20:06:21 +01:00
|
|
|
static int bus_kernel_translate_message(sd_bus *bus, struct kdbus_msg *k) {
|
|
|
|
struct kdbus_item *d, *found = NULL;
|
2013-05-16 02:37:42 +02:00
|
|
|
|
2014-01-18 20:06:21 +01:00
|
|
|
static int (* const translate[])(sd_bus *bus, struct kdbus_msg *k, struct kdbus_item *d) = {
|
|
|
|
[KDBUS_ITEM_NAME_ADD - _KDBUS_ITEM_KERNEL_BASE] = translate_name_change,
|
|
|
|
[KDBUS_ITEM_NAME_REMOVE - _KDBUS_ITEM_KERNEL_BASE] = translate_name_change,
|
|
|
|
[KDBUS_ITEM_NAME_CHANGE - _KDBUS_ITEM_KERNEL_BASE] = translate_name_change,
|
2013-05-16 02:37:42 +02:00
|
|
|
|
2014-01-18 20:06:21 +01:00
|
|
|
[KDBUS_ITEM_ID_ADD - _KDBUS_ITEM_KERNEL_BASE] = translate_id_change,
|
|
|
|
[KDBUS_ITEM_ID_REMOVE - _KDBUS_ITEM_KERNEL_BASE] = translate_id_change,
|
|
|
|
|
|
|
|
[KDBUS_ITEM_REPLY_TIMEOUT - _KDBUS_ITEM_KERNEL_BASE] = translate_reply,
|
|
|
|
[KDBUS_ITEM_REPLY_DEAD - _KDBUS_ITEM_KERNEL_BASE] = translate_reply,
|
|
|
|
};
|
|
|
|
|
|
|
|
assert(bus);
|
|
|
|
assert(k);
|
|
|
|
assert(k->payload_type == KDBUS_PAYLOAD_KERNEL);
|
|
|
|
|
|
|
|
KDBUS_ITEM_FOREACH(d, k, items) {
|
|
|
|
if (d->type >= _KDBUS_ITEM_KERNEL_BASE && d->type < _KDBUS_ITEM_KERNEL_BASE + ELEMENTSOF(translate)) {
|
|
|
|
if (found)
|
|
|
|
return -EBADMSG;
|
|
|
|
found = d;
|
|
|
|
} else
|
|
|
|
log_debug("Got unknown field from kernel %llu", d->type);
|
2013-05-16 02:37:42 +02:00
|
|
|
}
|
|
|
|
|
2014-01-18 20:06:21 +01:00
|
|
|
if (!found) {
|
|
|
|
log_debug("Didn't find a kernel message to translate.");
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
return translate[found->type - _KDBUS_ITEM_KERNEL_BASE](bus, k, found);
|
2013-04-11 23:09:29 +02:00
|
|
|
}
|
|
|
|
|
2014-01-22 20:26:58 +01:00
|
|
|
int bus_kernel_read_message(sd_bus *bus, bool hint_priority, int64_t priority) {
|
2014-01-17 01:29:48 +01:00
|
|
|
struct kdbus_cmd_recv recv = {};
|
2013-04-11 23:09:29 +02:00
|
|
|
struct kdbus_msg *k;
|
|
|
|
int r;
|
|
|
|
|
|
|
|
assert(bus);
|
2013-11-29 21:29:16 +01:00
|
|
|
|
2013-11-30 00:19:01 +01:00
|
|
|
r = bus_rqueue_make_room(bus);
|
2013-11-29 21:29:16 +01:00
|
|
|
if (r < 0)
|
|
|
|
return r;
|
2013-04-11 23:09:29 +02:00
|
|
|
|
2014-01-22 20:26:58 +01:00
|
|
|
if (hint_priority) {
|
|
|
|
recv.flags |= KDBUS_RECV_USE_PRIORITY;
|
|
|
|
recv.priority = priority;
|
|
|
|
}
|
|
|
|
|
2014-01-17 01:29:48 +01:00
|
|
|
r = ioctl(bus->input_fd, KDBUS_CMD_MSG_RECV, &recv);
|
2013-05-10 03:36:55 +02:00
|
|
|
if (r < 0) {
|
2013-04-11 23:09:29 +02:00
|
|
|
if (errno == EAGAIN)
|
|
|
|
return 0;
|
|
|
|
|
2013-05-10 03:36:55 +02:00
|
|
|
return -errno;
|
2013-04-11 23:09:29 +02:00
|
|
|
}
|
|
|
|
|
2014-01-21 15:02:07 +01:00
|
|
|
k = (struct kdbus_msg *)((uint8_t *)bus->kdbus_buffer + recv.offset);
|
2013-12-10 01:07:09 +01:00
|
|
|
if (k->payload_type == KDBUS_PAYLOAD_DBUS) {
|
2013-11-29 21:29:16 +01:00
|
|
|
r = bus_kernel_make_message(bus, k);
|
2013-12-10 01:07:09 +01:00
|
|
|
|
|
|
|
/* Anybody can send us invalid messages, let's just drop them. */
|
|
|
|
if (r == -EBADMSG || r == -EPROTOTYPE) {
|
2013-12-10 21:38:51 +01:00
|
|
|
log_debug("Ignoring invalid message: %s", strerror(-r));
|
2013-12-10 01:07:09 +01:00
|
|
|
r = 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
} else if (k->payload_type == KDBUS_PAYLOAD_KERNEL)
|
2013-11-29 21:29:16 +01:00
|
|
|
r = bus_kernel_translate_message(bus, k);
|
2014-01-21 15:02:07 +01:00
|
|
|
else {
|
|
|
|
log_debug("Ignoring message with unknown payload type %llu.", (unsigned long long) k->payload_type);
|
2013-11-29 20:07:56 +01:00
|
|
|
r = 0;
|
2014-01-21 15:02:07 +01:00
|
|
|
}
|
2013-11-29 20:07:56 +01:00
|
|
|
|
2013-05-10 03:36:55 +02:00
|
|
|
if (r <= 0)
|
|
|
|
close_kdbus_msg(bus, k);
|
2013-04-11 23:09:29 +02:00
|
|
|
|
2013-04-12 20:17:00 +02:00
|
|
|
return r < 0 ? r : 1;
|
2013-04-11 23:09:29 +02:00
|
|
|
}
|
|
|
|
|
2013-12-18 18:46:23 +01:00
|
|
|
int bus_kernel_pop_memfd(sd_bus *bus, void **address, size_t *mapped, size_t *allocated) {
|
2013-05-14 22:24:26 +02:00
|
|
|
struct memfd_cache *c;
|
2013-05-17 03:13:58 +02:00
|
|
|
int fd;
|
2013-05-14 22:24:26 +02:00
|
|
|
|
|
|
|
assert(address);
|
2013-12-18 18:46:23 +01:00
|
|
|
assert(mapped);
|
|
|
|
assert(allocated);
|
2013-12-10 20:31:10 +01:00
|
|
|
|
|
|
|
if (!bus || !bus->is_kernel)
|
|
|
|
return -ENOTSUP;
|
2013-05-14 22:24:26 +02:00
|
|
|
|
2013-05-29 09:58:31 +02:00
|
|
|
assert_se(pthread_mutex_lock(&bus->memfd_cache_mutex) >= 0);
|
2013-05-17 03:13:58 +02:00
|
|
|
|
2013-05-14 22:24:26 +02:00
|
|
|
if (bus->n_memfd_cache <= 0) {
|
2014-01-22 16:16:04 +01:00
|
|
|
_cleanup_free_ char *g = NULL;
|
|
|
|
struct kdbus_cmd_memfd_make *cmd;
|
|
|
|
struct kdbus_item *item;
|
|
|
|
size_t l, sz;
|
2013-05-17 03:13:58 +02:00
|
|
|
int r;
|
|
|
|
|
2013-05-29 09:58:31 +02:00
|
|
|
assert_se(pthread_mutex_unlock(&bus->memfd_cache_mutex) >= 0);
|
2013-05-14 22:24:26 +02:00
|
|
|
|
2014-01-22 16:16:04 +01:00
|
|
|
assert(bus->connection_name);
|
|
|
|
|
2014-03-11 19:03:50 +01:00
|
|
|
g = bus_label_escape(bus->connection_name);
|
2014-01-22 16:16:04 +01:00
|
|
|
if (!g)
|
|
|
|
return -ENOMEM;
|
|
|
|
|
|
|
|
l = strlen(g);
|
|
|
|
sz = ALIGN8(offsetof(struct kdbus_cmd_memfd_make, items)) +
|
|
|
|
ALIGN8(offsetof(struct kdbus_item, str)) +
|
|
|
|
l + 1;
|
|
|
|
cmd = alloca0(sz);
|
|
|
|
cmd->size = sz;
|
|
|
|
|
|
|
|
item = cmd->items;
|
|
|
|
item->size = ALIGN8(offsetof(struct kdbus_item, str)) + l + 1;
|
|
|
|
item->type = KDBUS_ITEM_MEMFD_NAME;
|
|
|
|
memcpy(item->str, g, l + 1);
|
|
|
|
|
|
|
|
r = ioctl(bus->input_fd, KDBUS_CMD_MEMFD_NEW, cmd);
|
2013-05-14 22:52:58 +02:00
|
|
|
if (r < 0)
|
2013-05-14 22:24:26 +02:00
|
|
|
return -errno;
|
|
|
|
|
|
|
|
*address = NULL;
|
2013-12-18 18:46:23 +01:00
|
|
|
*mapped = 0;
|
|
|
|
*allocated = 0;
|
2014-01-22 16:16:04 +01:00
|
|
|
return cmd->fd;
|
2013-05-14 22:24:26 +02:00
|
|
|
}
|
|
|
|
|
2013-06-04 23:37:57 +02:00
|
|
|
c = &bus->memfd_cache[--bus->n_memfd_cache];
|
2013-05-14 22:24:26 +02:00
|
|
|
|
|
|
|
assert(c->fd >= 0);
|
2013-12-18 18:46:23 +01:00
|
|
|
assert(c->mapped == 0 || c->address);
|
2013-05-14 22:24:26 +02:00
|
|
|
|
|
|
|
*address = c->address;
|
2013-12-18 18:46:23 +01:00
|
|
|
*mapped = c->mapped;
|
|
|
|
*allocated = c->allocated;
|
2013-05-17 03:13:58 +02:00
|
|
|
fd = c->fd;
|
|
|
|
|
2013-05-29 09:58:31 +02:00
|
|
|
assert_se(pthread_mutex_unlock(&bus->memfd_cache_mutex) >= 0);
|
2013-05-14 22:24:26 +02:00
|
|
|
|
2013-05-17 03:13:58 +02:00
|
|
|
return fd;
|
|
|
|
}
|
|
|
|
|
|
|
|
static void close_and_munmap(int fd, void *address, size_t size) {
|
|
|
|
if (size > 0)
|
2013-05-29 09:58:31 +02:00
|
|
|
assert_se(munmap(address, PAGE_ALIGN(size)) >= 0);
|
2013-05-17 03:13:58 +02:00
|
|
|
|
|
|
|
close_nointr_nofail(fd);
|
2013-05-14 22:24:26 +02:00
|
|
|
}
|
|
|
|
|
2013-12-18 18:46:23 +01:00
|
|
|
void bus_kernel_push_memfd(sd_bus *bus, int fd, void *address, size_t mapped, size_t allocated) {
|
2013-05-14 22:24:26 +02:00
|
|
|
struct memfd_cache *c;
|
2013-12-18 18:46:23 +01:00
|
|
|
uint64_t max_mapped = PAGE_ALIGN(MEMFD_CACHE_ITEM_SIZE_MAX);
|
2013-05-14 22:24:26 +02:00
|
|
|
|
|
|
|
assert(fd >= 0);
|
2013-12-18 18:46:23 +01:00
|
|
|
assert(mapped == 0 || address);
|
2013-05-14 22:24:26 +02:00
|
|
|
|
2013-05-17 03:13:58 +02:00
|
|
|
if (!bus || !bus->is_kernel) {
|
2013-12-18 18:46:23 +01:00
|
|
|
close_and_munmap(fd, address, mapped);
|
2013-05-17 03:13:58 +02:00
|
|
|
return;
|
|
|
|
}
|
|
|
|
|
2013-05-29 09:58:31 +02:00
|
|
|
assert_se(pthread_mutex_lock(&bus->memfd_cache_mutex) >= 0);
|
2013-05-14 22:24:26 +02:00
|
|
|
|
2013-05-17 03:13:58 +02:00
|
|
|
if (bus->n_memfd_cache >= ELEMENTSOF(bus->memfd_cache)) {
|
2013-05-29 09:58:31 +02:00
|
|
|
assert_se(pthread_mutex_unlock(&bus->memfd_cache_mutex) >= 0);
|
2013-05-14 22:24:26 +02:00
|
|
|
|
2013-12-18 18:46:23 +01:00
|
|
|
close_and_munmap(fd, address, mapped);
|
2013-05-14 22:24:26 +02:00
|
|
|
return;
|
|
|
|
}
|
|
|
|
|
|
|
|
c = &bus->memfd_cache[bus->n_memfd_cache++];
|
|
|
|
c->fd = fd;
|
|
|
|
c->address = address;
|
|
|
|
|
|
|
|
/* If overly long, let's return a bit to the OS */
|
2013-12-18 18:46:23 +01:00
|
|
|
if (mapped > max_mapped) {
|
|
|
|
assert_se(ioctl(fd, KDBUS_CMD_MEMFD_SIZE_SET, &max_mapped) >= 0);
|
|
|
|
assert_se(munmap((uint8_t*) address + max_mapped, PAGE_ALIGN(mapped - max_mapped)) >= 0);
|
|
|
|
c->mapped = c->allocated = max_mapped;
|
|
|
|
} else {
|
|
|
|
c->mapped = mapped;
|
|
|
|
c->allocated = allocated;
|
|
|
|
}
|
2013-05-17 03:13:58 +02:00
|
|
|
|
2013-05-29 09:58:31 +02:00
|
|
|
assert_se(pthread_mutex_unlock(&bus->memfd_cache_mutex) >= 0);
|
2013-05-14 22:24:26 +02:00
|
|
|
}
|
|
|
|
|
|
|
|
void bus_kernel_flush_memfd(sd_bus *b) {
|
|
|
|
unsigned i;
|
|
|
|
|
|
|
|
assert(b);
|
|
|
|
|
2013-05-29 09:58:31 +02:00
|
|
|
for (i = 0; i < b->n_memfd_cache; i++)
|
2013-12-18 18:46:23 +01:00
|
|
|
close_and_munmap(b->memfd_cache[i].fd, b->memfd_cache[i].address, b->memfd_cache[i].mapped);
|
2013-05-14 22:24:26 +02:00
|
|
|
}
|
2013-11-26 16:45:50 +01:00
|
|
|
|
2013-11-30 03:53:42 +01:00
|
|
|
int kdbus_translate_request_name_flags(uint64_t flags, uint64_t *kdbus_flags) {
|
|
|
|
uint64_t f = 0;
|
2013-11-26 16:45:50 +01:00
|
|
|
|
2013-11-30 03:53:42 +01:00
|
|
|
assert(kdbus_flags);
|
2013-11-26 16:45:50 +01:00
|
|
|
|
2013-11-30 03:53:42 +01:00
|
|
|
if (flags & SD_BUS_NAME_ALLOW_REPLACEMENT)
|
|
|
|
f |= KDBUS_NAME_ALLOW_REPLACEMENT;
|
2013-11-26 16:45:50 +01:00
|
|
|
|
2013-11-30 03:53:42 +01:00
|
|
|
if (flags & SD_BUS_NAME_REPLACE_EXISTING)
|
|
|
|
f |= KDBUS_NAME_REPLACE_EXISTING;
|
2013-11-26 16:45:50 +01:00
|
|
|
|
2013-12-12 06:23:38 +01:00
|
|
|
if (flags & SD_BUS_NAME_QUEUE)
|
2013-11-30 03:53:42 +01:00
|
|
|
f |= KDBUS_NAME_QUEUE;
|
2013-11-26 16:45:50 +01:00
|
|
|
|
2013-11-30 03:53:42 +01:00
|
|
|
*kdbus_flags = f;
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
int kdbus_translate_attach_flags(uint64_t mask, uint64_t *kdbus_mask) {
|
|
|
|
uint64_t m = 0;
|
|
|
|
|
|
|
|
assert(kdbus_mask);
|
|
|
|
|
|
|
|
if (mask & (SD_BUS_CREDS_UID|SD_BUS_CREDS_GID|SD_BUS_CREDS_PID|SD_BUS_CREDS_PID_STARTTIME|SD_BUS_CREDS_TID))
|
|
|
|
m |= KDBUS_ATTACH_CREDS;
|
|
|
|
|
|
|
|
if (mask & (SD_BUS_CREDS_COMM|SD_BUS_CREDS_TID_COMM))
|
|
|
|
m |= KDBUS_ATTACH_COMM;
|
|
|
|
|
|
|
|
if (mask & SD_BUS_CREDS_EXE)
|
|
|
|
m |= KDBUS_ATTACH_EXE;
|
|
|
|
|
|
|
|
if (mask & SD_BUS_CREDS_CMDLINE)
|
|
|
|
m |= KDBUS_ATTACH_CMDLINE;
|
|
|
|
|
|
|
|
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))
|
|
|
|
m |= KDBUS_ATTACH_CGROUP;
|
|
|
|
|
|
|
|
if (mask & (SD_BUS_CREDS_EFFECTIVE_CAPS|SD_BUS_CREDS_PERMITTED_CAPS|SD_BUS_CREDS_INHERITABLE_CAPS|SD_BUS_CREDS_BOUNDING_CAPS))
|
|
|
|
m |= KDBUS_ATTACH_CAPS;
|
|
|
|
|
|
|
|
if (mask & SD_BUS_CREDS_SELINUX_CONTEXT)
|
|
|
|
m |= KDBUS_ATTACH_SECLABEL;
|
2013-11-26 16:45:50 +01:00
|
|
|
|
2013-11-30 03:53:42 +01:00
|
|
|
if (mask & (SD_BUS_CREDS_AUDIT_SESSION_ID|SD_BUS_CREDS_AUDIT_LOGIN_UID))
|
|
|
|
m |= KDBUS_ATTACH_AUDIT;
|
|
|
|
|
2013-11-30 04:14:10 +01:00
|
|
|
if (mask & SD_BUS_CREDS_WELL_KNOWN_NAMES)
|
|
|
|
m |= KDBUS_ATTACH_NAMES;
|
|
|
|
|
2014-01-22 16:28:58 +01:00
|
|
|
if (mask & SD_BUS_CREDS_CONNECTION_NAME)
|
|
|
|
m |= KDBUS_ATTACH_CONN_NAME;
|
|
|
|
|
2013-11-30 03:53:42 +01:00
|
|
|
*kdbus_mask = m;
|
2013-11-26 16:45:50 +01:00
|
|
|
return 0;
|
|
|
|
}
|
2013-11-30 03:53:42 +01:00
|
|
|
|
2013-12-26 03:08:15 +01:00
|
|
|
int bus_kernel_create_bus(const char *name, bool world, char **s) {
|
2013-12-17 13:45:02 +01:00
|
|
|
struct kdbus_cmd_make *make;
|
2013-11-30 03:53:42 +01:00
|
|
|
struct kdbus_item *n;
|
|
|
|
int fd;
|
|
|
|
|
|
|
|
assert(name);
|
|
|
|
assert(s);
|
|
|
|
|
|
|
|
fd = open("/dev/kdbus/control", O_RDWR|O_NOCTTY|O_CLOEXEC);
|
|
|
|
if (fd < 0)
|
|
|
|
return -errno;
|
|
|
|
|
2013-12-17 13:45:02 +01:00
|
|
|
make = alloca0(ALIGN8(offsetof(struct kdbus_cmd_make, items) +
|
|
|
|
offsetof(struct kdbus_item, data64) + sizeof(uint64_t) +
|
2013-11-30 03:53:42 +01:00
|
|
|
offsetof(struct kdbus_item, str) +
|
|
|
|
DECIMAL_STR_MAX(uid_t) + 1 + strlen(name) + 1));
|
|
|
|
|
2013-12-17 13:45:02 +01:00
|
|
|
make->size = offsetof(struct kdbus_cmd_make, items);
|
|
|
|
|
2013-11-30 03:53:42 +01:00
|
|
|
n = make->items;
|
2014-01-24 17:06:36 +01:00
|
|
|
n->size = offsetof(struct kdbus_item, bloom_parameter) +
|
|
|
|
sizeof(struct kdbus_bloom_parameter);
|
|
|
|
n->type = KDBUS_ITEM_BLOOM_PARAMETER;
|
2014-01-28 00:57:38 +01:00
|
|
|
|
|
|
|
n->bloom_parameter.size = DEFAULT_BLOOM_SIZE;
|
|
|
|
n->bloom_parameter.n_hash = DEFAULT_BLOOM_N_HASH;
|
|
|
|
|
|
|
|
assert_cc(DEFAULT_BLOOM_SIZE > 0);
|
|
|
|
assert_cc(DEFAULT_BLOOM_N_HASH > 0);
|
|
|
|
|
2013-12-17 13:45:02 +01:00
|
|
|
make->size += ALIGN8(n->size);
|
|
|
|
|
|
|
|
n = KDBUS_ITEM_NEXT(n);
|
2013-11-30 03:53:42 +01:00
|
|
|
sprintf(n->str, "%lu-%s", (unsigned long) getuid(), name);
|
|
|
|
n->size = offsetof(struct kdbus_item, str) + strlen(n->str) + 1;
|
2013-12-06 20:19:20 +01:00
|
|
|
n->type = KDBUS_ITEM_MAKE_NAME;
|
2013-12-17 13:45:02 +01:00
|
|
|
make->size += ALIGN8(n->size);
|
2013-11-30 03:53:42 +01:00
|
|
|
|
2014-03-07 17:14:52 +01:00
|
|
|
make->flags = world ? KDBUS_MAKE_ACCESS_WORLD : 0;
|
2013-11-30 03:53:42 +01:00
|
|
|
|
|
|
|
if (ioctl(fd, KDBUS_CMD_BUS_MAKE, make) < 0) {
|
|
|
|
close_nointr_nofail(fd);
|
|
|
|
return -errno;
|
|
|
|
}
|
|
|
|
|
2013-12-02 23:31:41 +01:00
|
|
|
/* The higher 32bit of the flags field are considered
|
|
|
|
* 'incompatible flags'. Refuse them all for now. */
|
|
|
|
if (make->flags > 0xFFFFFFFFULL) {
|
|
|
|
close_nointr_nofail(fd);
|
|
|
|
return -ENOTSUP;
|
|
|
|
}
|
|
|
|
|
2013-11-30 03:53:42 +01:00
|
|
|
if (s) {
|
|
|
|
char *p;
|
|
|
|
|
|
|
|
p = strjoin("/dev/kdbus/", n->str, "/bus", NULL);
|
|
|
|
if (!p) {
|
|
|
|
close_nointr_nofail(fd);
|
|
|
|
return -ENOMEM;
|
|
|
|
}
|
|
|
|
|
|
|
|
*s = p;
|
|
|
|
}
|
|
|
|
|
|
|
|
return fd;
|
|
|
|
}
|
2013-11-30 16:36:46 +01:00
|
|
|
|
2014-03-07 17:29:01 +01:00
|
|
|
static void bus_kernel_translate_policy(const BusNamePolicy *policy, struct kdbus_item *item)
|
|
|
|
{
|
|
|
|
switch (policy->type) {
|
|
|
|
case BUSNAME_POLICY_TYPE_USER:
|
|
|
|
item->policy_access.type = KDBUS_POLICY_ACCESS_USER;
|
|
|
|
item->policy_access.id = policy->uid;
|
|
|
|
break;
|
|
|
|
|
|
|
|
case BUSNAME_POLICY_TYPE_GROUP:
|
|
|
|
item->policy_access.type = KDBUS_POLICY_ACCESS_GROUP;
|
|
|
|
item->policy_access.id = policy->gid;
|
|
|
|
break;
|
|
|
|
|
|
|
|
case BUSNAME_POLICY_TYPE_WORLD:
|
|
|
|
item->policy_access.type = KDBUS_POLICY_ACCESS_WORLD;
|
|
|
|
break;
|
|
|
|
|
|
|
|
default:
|
|
|
|
assert_not_reached("Unknown policy type");
|
|
|
|
}
|
|
|
|
|
|
|
|
switch (policy->access) {
|
|
|
|
case BUSNAME_POLICY_ACCESS_SEE:
|
|
|
|
item->policy_access.access = KDBUS_POLICY_SEE;
|
|
|
|
break;
|
|
|
|
|
|
|
|
case BUSNAME_POLICY_ACCESS_TALK:
|
|
|
|
item->policy_access.access = KDBUS_POLICY_TALK;
|
|
|
|
break;
|
|
|
|
|
|
|
|
case BUSNAME_POLICY_ACCESS_OWN:
|
|
|
|
item->policy_access.access = KDBUS_POLICY_OWN;
|
|
|
|
break;
|
|
|
|
|
|
|
|
default:
|
|
|
|
assert_not_reached("Unknown policy access");
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
int bus_kernel_create_starter(const char *bus, const char *name, BusNamePolicy *policy) {
|
2013-12-02 23:30:19 +01:00
|
|
|
struct kdbus_cmd_hello *hello;
|
|
|
|
struct kdbus_item *n;
|
2014-03-07 17:29:01 +01:00
|
|
|
size_t policy_cnt = 0;
|
|
|
|
BusNamePolicy *po;
|
|
|
|
size_t size;
|
2013-12-02 23:30:19 +01:00
|
|
|
char *p;
|
|
|
|
int fd;
|
|
|
|
|
|
|
|
assert(bus);
|
|
|
|
assert(name);
|
|
|
|
|
|
|
|
p = alloca(sizeof("/dev/kdbus/") - 1 + DECIMAL_STR_MAX(uid_t) + 1 + strlen(bus) + sizeof("/bus"));
|
|
|
|
sprintf(p, "/dev/kdbus/%lu-%s/bus", (unsigned long) getuid(), bus);
|
|
|
|
|
|
|
|
fd = open(p, O_RDWR|O_NOCTTY|O_CLOEXEC);
|
|
|
|
if (fd < 0)
|
|
|
|
return -errno;
|
|
|
|
|
2014-03-07 17:29:01 +01:00
|
|
|
LIST_FOREACH(policy, po, policy)
|
|
|
|
policy_cnt++;
|
|
|
|
|
|
|
|
size = ALIGN8(offsetof(struct kdbus_cmd_hello, items)) +
|
|
|
|
ALIGN8(offsetof(struct kdbus_item, str) + strlen(name) + 1) +
|
|
|
|
policy_cnt * ALIGN8(offsetof(struct kdbus_item, policy_access) + sizeof(struct kdbus_policy_access));
|
|
|
|
|
|
|
|
hello = alloca0(size);
|
2013-12-02 23:30:19 +01:00
|
|
|
|
|
|
|
n = hello->items;
|
|
|
|
strcpy(n->str, name);
|
|
|
|
n->size = offsetof(struct kdbus_item, str) + strlen(n->str) + 1;
|
2013-12-17 12:25:20 +01:00
|
|
|
n->type = KDBUS_ITEM_NAME;
|
2014-03-07 17:29:01 +01:00
|
|
|
n = KDBUS_ITEM_NEXT(n);
|
|
|
|
|
|
|
|
LIST_FOREACH(policy, po, policy) {
|
|
|
|
n->type = KDBUS_ITEM_POLICY_ACCESS;
|
|
|
|
n->size = offsetof(struct kdbus_item, policy_access) + sizeof(struct kdbus_policy_access);
|
|
|
|
bus_kernel_translate_policy(po, n);
|
|
|
|
n = KDBUS_ITEM_NEXT(n);
|
|
|
|
}
|
2013-12-02 23:30:19 +01:00
|
|
|
|
2014-03-07 17:29:01 +01:00
|
|
|
hello->size = size;
|
2013-12-12 20:19:12 +01:00
|
|
|
hello->conn_flags = KDBUS_HELLO_ACTIVATOR;
|
2013-12-02 23:30:19 +01:00
|
|
|
hello->pool_size = KDBUS_POOL_SIZE;
|
|
|
|
|
|
|
|
if (ioctl(fd, KDBUS_CMD_HELLO, hello) < 0) {
|
|
|
|
close_nointr_nofail(fd);
|
|
|
|
return -errno;
|
|
|
|
}
|
|
|
|
|
|
|
|
/* The higher 32bit of both flags fields are considered
|
|
|
|
* 'incompatible flags'. Refuse them all for now. */
|
|
|
|
if (hello->bus_flags > 0xFFFFFFFFULL ||
|
|
|
|
hello->conn_flags > 0xFFFFFFFFULL) {
|
|
|
|
close_nointr_nofail(fd);
|
|
|
|
return -ENOTSUP;
|
|
|
|
}
|
|
|
|
|
2014-01-28 00:57:38 +01:00
|
|
|
if (!bloom_validate_parameters((size_t) hello->bloom.size, (unsigned) hello->bloom.n_hash)) {
|
2013-12-02 23:30:19 +01:00
|
|
|
close_nointr_nofail(fd);
|
|
|
|
return -ENOTSUP;
|
|
|
|
}
|
|
|
|
|
|
|
|
return fd;
|
|
|
|
}
|
|
|
|
|
2014-02-01 14:41:13 +01:00
|
|
|
int bus_kernel_create_domain(const char *name, char **s) {
|
2013-12-17 13:45:02 +01:00
|
|
|
struct kdbus_cmd_make *make;
|
2013-11-30 16:36:46 +01:00
|
|
|
struct kdbus_item *n;
|
|
|
|
int fd;
|
|
|
|
|
|
|
|
assert(name);
|
|
|
|
assert(s);
|
|
|
|
|
|
|
|
fd = open("/dev/kdbus/control", O_RDWR|O_NOCTTY|O_CLOEXEC);
|
|
|
|
if (fd < 0)
|
|
|
|
return -errno;
|
|
|
|
|
2013-12-17 13:45:02 +01:00
|
|
|
make = alloca0(ALIGN8(offsetof(struct kdbus_cmd_make, items) +
|
2013-11-30 16:36:46 +01:00
|
|
|
offsetof(struct kdbus_item, str) +
|
|
|
|
strlen(name) + 1));
|
|
|
|
|
|
|
|
n = make->items;
|
|
|
|
strcpy(n->str, name);
|
|
|
|
n->size = offsetof(struct kdbus_item, str) + strlen(n->str) + 1;
|
2013-12-06 20:19:20 +01:00
|
|
|
n->type = KDBUS_ITEM_MAKE_NAME;
|
2013-11-30 16:36:46 +01:00
|
|
|
|
2013-12-17 13:45:02 +01:00
|
|
|
make->size = ALIGN8(offsetof(struct kdbus_cmd_make, items) + n->size);
|
2014-03-07 17:14:52 +01:00
|
|
|
make->flags = KDBUS_MAKE_ACCESS_WORLD;
|
2013-11-30 16:36:46 +01:00
|
|
|
|
2014-02-01 14:41:13 +01:00
|
|
|
if (ioctl(fd, KDBUS_CMD_DOMAIN_MAKE, make) < 0) {
|
2013-11-30 16:36:46 +01:00
|
|
|
close_nointr_nofail(fd);
|
|
|
|
return -errno;
|
|
|
|
}
|
|
|
|
|
2013-12-02 23:31:41 +01:00
|
|
|
/* The higher 32bit of the flags field are considered
|
|
|
|
* 'incompatible flags'. Refuse them all for now. */
|
|
|
|
if (make->flags > 0xFFFFFFFFULL) {
|
|
|
|
close_nointr_nofail(fd);
|
|
|
|
return -ENOTSUP;
|
|
|
|
}
|
|
|
|
|
2013-11-30 16:36:46 +01:00
|
|
|
if (s) {
|
|
|
|
char *p;
|
|
|
|
|
2014-02-01 14:41:13 +01:00
|
|
|
p = strappend("/dev/kdbus/domain/", name);
|
2013-11-30 16:36:46 +01:00
|
|
|
if (!p) {
|
|
|
|
close_nointr_nofail(fd);
|
|
|
|
return -ENOMEM;
|
|
|
|
}
|
|
|
|
|
|
|
|
*s = p;
|
|
|
|
}
|
|
|
|
|
|
|
|
return fd;
|
|
|
|
}
|
2013-12-03 15:17:55 +01:00
|
|
|
|
2013-12-15 16:56:28 +01:00
|
|
|
int bus_kernel_create_monitor(const char *bus) {
|
|
|
|
struct kdbus_cmd_hello *hello;
|
|
|
|
char *p;
|
|
|
|
int fd;
|
2013-12-03 15:17:55 +01:00
|
|
|
|
|
|
|
assert(bus);
|
|
|
|
|
2013-12-15 16:56:28 +01:00
|
|
|
p = alloca(sizeof("/dev/kdbus/") - 1 + DECIMAL_STR_MAX(uid_t) + 1 + strlen(bus) + sizeof("/bus"));
|
|
|
|
sprintf(p, "/dev/kdbus/%lu-%s/bus", (unsigned long) getuid(), bus);
|
2013-12-03 15:17:55 +01:00
|
|
|
|
2013-12-15 16:56:28 +01:00
|
|
|
fd = open(p, O_RDWR|O_NOCTTY|O_CLOEXEC);
|
|
|
|
if (fd < 0)
|
2013-12-03 15:17:55 +01:00
|
|
|
return -errno;
|
|
|
|
|
2013-12-15 16:56:28 +01:00
|
|
|
hello = alloca0(sizeof(struct kdbus_cmd_hello));
|
|
|
|
hello->size = sizeof(struct kdbus_cmd_hello);
|
|
|
|
hello->conn_flags = KDBUS_HELLO_ACTIVATOR;
|
|
|
|
hello->pool_size = KDBUS_POOL_SIZE;
|
|
|
|
|
|
|
|
if (ioctl(fd, KDBUS_CMD_HELLO, hello) < 0) {
|
|
|
|
close_nointr_nofail(fd);
|
|
|
|
return -errno;
|
|
|
|
}
|
|
|
|
|
|
|
|
/* The higher 32bit of both flags fields are considered
|
|
|
|
* 'incompatible flags'. Refuse them all for now. */
|
|
|
|
if (hello->bus_flags > 0xFFFFFFFFULL ||
|
|
|
|
hello->conn_flags > 0xFFFFFFFFULL) {
|
|
|
|
close_nointr_nofail(fd);
|
|
|
|
return -ENOTSUP;
|
|
|
|
}
|
|
|
|
|
|
|
|
return fd;
|
2013-12-03 15:17:55 +01:00
|
|
|
}
|
2013-12-20 23:25:43 +01:00
|
|
|
|
|
|
|
int bus_kernel_try_close(sd_bus *bus) {
|
|
|
|
assert(bus);
|
|
|
|
assert(bus->is_kernel);
|
|
|
|
|
|
|
|
if (ioctl(bus->input_fd, KDBUS_CMD_BYEBYE) < 0)
|
|
|
|
return -errno;
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
}
|
2014-01-22 23:36:06 +01:00
|
|
|
|
|
|
|
int bus_kernel_drop_one(int fd) {
|
|
|
|
struct kdbus_cmd_recv recv = {
|
|
|
|
.flags = KDBUS_RECV_DROP
|
|
|
|
};
|
|
|
|
|
|
|
|
assert(fd >= 0);
|
|
|
|
|
|
|
|
if (ioctl(fd, KDBUS_CMD_MSG_RECV, &recv) < 0)
|
|
|
|
return -errno;
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
}
|