#include <fcntl.h>
#include <malloc.h>
-#include <libgen.h>
#include <sys/mman.h>
#include <sys/prctl.h>
+/* When we include libgen.h because we need dirname() we immediately
+ * undefine basename() since libgen.h defines it as a macro to the XDG
+ * version which is really broken. */
+#include <libgen.h>
+#undef basename
+
#include "util.h"
#include "strv.h"
+#include "memfd-util.h"
+#include "capability.h"
+#include "cgroup-util.h"
+#include "fileio.h"
#include "bus-internal.h"
#include "bus-message.h"
#include "bus-bloom.h"
#include "bus-util.h"
#include "bus-label.h"
-#include "cgroup-util.h"
#define UNIQUE_NAME_MAX (3+DECIMAL_STR_MAX(uint64_t))
*d = (struct kdbus_item *) ((uint8_t*) *d + (*d)->size);
}
-static void append_payload_memfd(struct kdbus_item **d, int memfd, size_t sz) {
+static void append_payload_memfd(struct kdbus_item **d, int memfd, size_t start, size_t sz) {
assert(d);
assert(memfd >= 0);
assert(sz > 0);
(*d)->size = offsetof(struct kdbus_item, memfd) + sizeof(struct kdbus_memfd);
(*d)->type = KDBUS_ITEM_PAYLOAD_MEMFD;
(*d)->memfd.fd = memfd;
+ (*d)->memfd.start = start;
(*d)->memfd.size = sz;
*d = (struct kdbus_item *) ((uint8_t*) *d + (*d)->size);
*d = (struct kdbus_item *) ((uint8_t*) *d + (*d)->size);
}
+static void add_bloom_arg(void *data, size_t size, unsigned n_hash, unsigned i, const char *t) {
+ char buf[sizeof("arg")-1 + 2 + sizeof("-slash-prefix")];
+ char *e;
+
+ assert(data);
+ assert(size > 0);
+ assert(i < 64);
+ assert(t);
+
+ e = stpcpy(buf, "arg");
+ if (i < 10)
+ *(e++) = '0' + (char) i;
+ else {
+ *(e++) = '0' + (char) (i / 10);
+ *(e++) = '0' + (char) (i % 10);
+ }
+
+ *e = 0;
+ bloom_add_pair(data, size, n_hash, buf, t);
+
+ strcpy(e, "-dot-prefix");
+ bloom_add_prefixes(data, size, n_hash, buf, t, '.');
+ strcpy(e, "-slash-prefix");
+ bloom_add_prefixes(data, size, n_hash, buf, t, '/');
+}
+
static int bus_message_setup_bloom(sd_bus_message *m, struct kdbus_bloom_filter *bloom) {
void *data;
unsigned i;
return r;
for (i = 0; i < 64; i++) {
+ const char *t, *contents;
char type;
- const char *t;
- char buf[sizeof("arg")-1 + 2 + sizeof("-slash-prefix")];
- char *e;
- r = sd_bus_message_peek_type(m, &type, NULL);
+ r = sd_bus_message_peek_type(m, &type, &contents);
if (r < 0)
return r;
- if (type != SD_BUS_TYPE_STRING &&
- type != SD_BUS_TYPE_OBJECT_PATH &&
- type != SD_BUS_TYPE_SIGNATURE)
- break;
+ if (IN_SET(type, SD_BUS_TYPE_STRING, SD_BUS_TYPE_OBJECT_PATH, SD_BUS_TYPE_SIGNATURE)) {
- r = sd_bus_message_read_basic(m, type, &t);
- if (r < 0)
- return r;
+ /* The bloom filter includes simple strings of any kind */
+ r = sd_bus_message_read_basic(m, type, &t);
+ if (r < 0)
+ return r;
- e = stpcpy(buf, "arg");
- if (i < 10)
- *(e++) = '0' + (char) i;
- else {
- *(e++) = '0' + (char) (i / 10);
- *(e++) = '0' + (char) (i % 10);
- }
+ add_bloom_arg(data, m->bus->bloom_size, m->bus->bloom_n_hash, i, t);
+ } if (type == SD_BUS_TYPE_ARRAY && STR_IN_SET(contents, "s", "o", "g")) {
- *e = 0;
- bloom_add_pair(data, m->bus->bloom_size, m->bus->bloom_n_hash, buf, t);
+ /* As well as array of simple strings of any kinds */
+ r = sd_bus_message_enter_container(m, type, contents);
+ if (r < 0)
+ return r;
- strcpy(e, "-dot-prefix");
- bloom_add_prefixes(data, m->bus->bloom_size, m->bus->bloom_n_hash, buf, t, '.');
- strcpy(e, "-slash-prefix");
- bloom_add_prefixes(data, m->bus->bloom_size, m->bus->bloom_n_hash, buf, t, '/');
+ while ((r = sd_bus_message_read_basic(m, contents[0], &t)) > 0)
+ add_bloom_arg(data, m->bus->bloom_size, m->bus->bloom_n_hash, i, t);
+ if (r < 0)
+ return r;
+
+ r = sd_bus_message_exit_container(m);
+ if (r < 0)
+ return r;
+
+ } else
+ /* Stop adding to bloom filter as soon as we
+ * run into the first argument we cannot add
+ * to it. */
+ break;
}
return 0;
static int bus_message_setup_kmsg(sd_bus *b, sd_bus_message *m) {
struct bus_body_part *part;
struct kdbus_item *d;
+ const char *destination;
bool well_known;
uint64_t unique;
size_t sz, dl;
if (m->kdbus)
return 0;
- if (m->destination) {
- r = bus_kernel_parse_unique_name(m->destination, &unique);
+ destination = m->destination ?: m->destination_ptr;
+
+ if (destination) {
+ r = bus_kernel_parse_unique_name(destination, &unique);
if (r < 0)
return r;
sz = offsetof(struct kdbus_msg, items);
- assert_cc(ALIGN8(offsetof(struct kdbus_item, vec) + sizeof(struct kdbus_vec)) ==
- ALIGN8(offsetof(struct kdbus_item, memfd) + sizeof(struct kdbus_memfd)));
-
/* Add in fixed header, fields header and payload */
- sz += (1 + m->n_body_parts) *
- ALIGN8(offsetof(struct kdbus_item, vec) + sizeof(struct kdbus_vec));
+ sz += (1 + m->n_body_parts) * ALIGN8(offsetof(struct kdbus_item, vec) +
+ MAX(sizeof(struct kdbus_vec),
+ sizeof(struct kdbus_memfd)));
/* Add space for bloom filter */
sz += ALIGN8(offsetof(struct kdbus_item, bloom_filter) +
/* Add in well-known destination header */
if (well_known) {
- dl = strlen(m->destination);
+ dl = strlen(destination);
sz += ALIGN8(offsetof(struct kdbus_item, str) + dl + 1);
}
memzero(m->kdbus, sz);
m->kdbus->flags =
- ((m->header->flags & BUS_MESSAGE_NO_REPLY_EXPECTED) ? 0 : KDBUS_MSG_FLAGS_EXPECT_REPLY) |
- ((m->header->flags & BUS_MESSAGE_NO_AUTO_START) ? KDBUS_MSG_FLAGS_NO_AUTO_START : 0);
- m->kdbus->dst_id =
- well_known ? 0 :
- m->destination ? unique : KDBUS_DST_ID_BROADCAST;
+ ((m->header->flags & BUS_MESSAGE_NO_REPLY_EXPECTED) ? 0 : KDBUS_MSG_EXPECT_REPLY) |
+ ((m->header->flags & BUS_MESSAGE_NO_AUTO_START) ? KDBUS_MSG_NO_AUTO_START : 0) |
+ ((m->header->type == SD_BUS_MESSAGE_SIGNAL) ? KDBUS_MSG_SIGNAL : 0);
+
+ if (well_known)
+ /* verify_destination_id will usually be 0, which makes the kernel driver only look
+ * at the provided well-known name. Otherwise, the kernel will make sure the provided
+ * destination id matches the owner of the provided weel-known-name, and fail if they
+ * differ. Currently, this is only needed for bus-proxyd. */
+ m->kdbus->dst_id = m->verify_destination_id;
+ else
+ m->kdbus->dst_id = destination ? unique : KDBUS_DST_ID_BROADCAST;
+
m->kdbus->payload_type = KDBUS_PAYLOAD_DBUS;
m->kdbus->cookie = (uint64_t) m->header->serial;
m->kdbus->priority = m->priority;
if (m->header->flags & BUS_MESSAGE_NO_REPLY_EXPECTED)
m->kdbus->cookie_reply = m->reply_cookie;
- else
- m->kdbus->timeout_ns = m->timeout * NSEC_PER_USEC;
+ else {
+ struct timespec now;
+
+ assert_se(clock_gettime(CLOCK_MONOTONIC_COARSE, &now) == 0);
+ m->kdbus->timeout_ns = now.tv_sec * NSEC_PER_SEC + now.tv_nsec +
+ m->timeout * NSEC_PER_USEC;
+ }
d = m->kdbus->items;
if (well_known)
- append_destination(&d, m->destination, dl);
+ append_destination(&d, destination, dl);
append_payload_vec(&d, m->header, BUS_MESSAGE_BODY_BEGIN(m));
continue;
}
- if (part->memfd >= 0 && part->sealed && m->destination) {
+ if (part->memfd >= 0 && part->sealed && destination) {
/* Try to send a memfd, if the part is
* sealed and this is not a broadcast. Since we can only */
- append_payload_memfd(&d, part->memfd, part->size);
+ append_payload_memfd(&d, part->memfd, part->memfd_offset, part->size);
continue;
}
append_payload_vec(&d, part->data, part->size);
}
- if (m->kdbus->dst_id == KDBUS_DST_ID_BROADCAST) {
+ if (m->header->type == SD_BUS_MESSAGE_SIGNAL) {
struct kdbus_bloom_filter *bloom;
bloom = append_bloom(&d, m->bus->bloom_size);
part->memfd = -1;
}
+static void message_set_timestamp(sd_bus *bus, sd_bus_message *m, const struct kdbus_timestamp *ts) {
+ assert(bus);
+ assert(m);
+
+ if (!ts)
+ return;
+
+ if (!(bus->attach_flags & KDBUS_ATTACH_TIMESTAMP))
+ return;
+
+ m->realtime = ts->realtime_ns / NSEC_PER_USEC;
+ m->monotonic = ts->monotonic_ns / NSEC_PER_USEC;
+ m->seqnum = ts->seqnum;
+}
+
static int bus_kernel_make_message(sd_bus *bus, struct kdbus_msg *k) {
sd_bus_message *m = NULL;
struct kdbus_item *d;
}
part->memfd = d->memfd.fd;
+ part->memfd_offset = d->memfd.start;
part->size = d->memfd.size;
part->sealed = true;
break;
}
- 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;
-
- /* 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 */
-
- 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;
+ case KDBUS_ITEM_PIDS:
+
+ /* The PID/TID might be missing, 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. */
+
+ if (d->pids.pid > 0) {
+ m->creds.pid = (pid_t) d->pids.pid;
+ m->creds.mask |= SD_BUS_CREDS_PID & bus->creds_mask;
}
- if (d->creds.tid > 0) {
- m->creds.tid = (pid_t) d->creds.tid;
+ if (d->pids.tid > 0) {
+ m->creds.tid = (pid_t) d->pids.tid;
m->creds.mask |= SD_BUS_CREDS_TID & bus->creds_mask;
}
+
break;
- case KDBUS_ITEM_TIMESTAMP:
+ case KDBUS_ITEM_CREDS:
+
+ /* EUID/SUID/FSUID/EGID/SGID/FSGID might be missing too (see above). */
+
+ if ((uid_t) d->creds.uid != UID_INVALID) {
+ m->creds.uid = (uid_t) d->creds.uid;
+ m->creds.mask |= SD_BUS_CREDS_UID & bus->creds_mask;
+ }
+
+ if ((uid_t) d->creds.euid != UID_INVALID) {
+ m->creds.euid = (uid_t) d->creds.euid;
+ m->creds.mask |= SD_BUS_CREDS_EUID & bus->creds_mask;
+ }
+
+ if ((uid_t) d->creds.suid != UID_INVALID) {
+ m->creds.suid = (uid_t) d->creds.suid;
+ m->creds.mask |= SD_BUS_CREDS_SUID & bus->creds_mask;
+ }
+
+ if ((uid_t) d->creds.fsuid != UID_INVALID) {
+ m->creds.fsuid = (uid_t) d->creds.fsuid;
+ m->creds.mask |= SD_BUS_CREDS_FSUID & bus->creds_mask;
+ }
+
+ if ((gid_t) d->creds.gid != GID_INVALID) {
+ m->creds.gid = (gid_t) d->creds.gid;
+ m->creds.mask |= SD_BUS_CREDS_GID & bus->creds_mask;
+ }
+
+ if ((gid_t) d->creds.egid != GID_INVALID) {
+ m->creds.egid = (gid_t) d->creds.egid;
+ m->creds.mask |= SD_BUS_CREDS_EGID & bus->creds_mask;
+ }
+
+ if ((gid_t) d->creds.sgid != GID_INVALID) {
+ m->creds.sgid = (gid_t) d->creds.sgid;
+ m->creds.mask |= SD_BUS_CREDS_SGID & bus->creds_mask;
+ }
- 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;
+ if ((gid_t) d->creds.fsgid != GID_INVALID) {
+ m->creds.fsgid = (gid_t) d->creds.fsgid;
+ m->creds.mask |= SD_BUS_CREDS_FSGID & bus->creds_mask;
}
break;
+ case KDBUS_ITEM_TIMESTAMP:
+ message_set_timestamp(bus, m, &d->timestamp);
+ break;
+
case KDBUS_ITEM_PID_COMM:
m->creds.comm = d->str;
m->creds.mask |= SD_BUS_CREDS_COMM & bus->creds_mask;
break;
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;
+ if ((uint32_t) d->audit.sessionid != (uint32_t) -1) {
+ m->creds.audit_session_id = (uint32_t) d->audit.sessionid;
+ m->creds.mask |= SD_BUS_CREDS_AUDIT_SESSION_ID & bus->creds_mask;
+ }
+
+ if ((uid_t) d->audit.loginuid != UID_INVALID) {
+ m->creds.audit_login_uid = (uid_t) d->audit.loginuid;
+ m->creds.mask |= SD_BUS_CREDS_AUDIT_LOGIN_UID & bus->creds_mask;
+ }
break;
case KDBUS_ITEM_CAPS:
- m->creds.capability = d->data;
- m->creds.capability_size = l;
+ if (d->caps.last_cap != cap_last_cap() ||
+ d->size - offsetof(struct kdbus_item, caps.caps) < DIV_ROUND_UP(d->caps.last_cap, 32U) * 4 * 4) {
+ r = -EBADMSG;
+ goto fail;
+ }
+
+ m->creds.capability = d->caps.caps;
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;
case KDBUS_ITEM_DST_NAME:
- if (!service_name_is_valid(d->str))
- return -EBADMSG;
+ if (!service_name_is_valid(d->str)) {
+ r = -EBADMSG;
+ goto fail;
+ }
destination = d->str;
break;
- case KDBUS_ITEM_NAME:
- if (!service_name_is_valid(d->name.name))
- return -EBADMSG;
-
- r = strv_extend(&m->creds.well_known_names, d->name.name);
- if (r < 0)
+ case KDBUS_ITEM_OWNED_NAME:
+ if (!service_name_is_valid(d->name.name)) {
+ r = -EBADMSG;
goto fail;
+ }
+
+ if (bus->creds_mask & SD_BUS_CREDS_WELL_KNOWN_NAMES) {
+ char **wkn;
+ size_t n;
+
+ /* We just extend the array here, but
+ * do not allocate the strings inside
+ * of it, instead we just point to our
+ * buffer directly. */
+ n = strv_length(m->creds.well_known_names);
+ wkn = realloc(m->creds.well_known_names, (n + 2) * sizeof(char*));
+ if (!wkn) {
+ r = -ENOMEM;
+ goto fail;
+ }
+
+ wkn[n] = d->name.name;
+ wkn[n+1] = NULL;
+ m->creds.well_known_names = wkn;
+
+ m->creds.mask |= SD_BUS_CREDS_WELL_KNOWN_NAMES;
+ }
break;
- case KDBUS_ITEM_CONN_NAME:
- m->creds.conn_name = d->str;
- m->creds.mask |= SD_BUS_CREDS_CONNECTION_NAME & bus->creds_mask;
+ case KDBUS_ITEM_CONN_DESCRIPTION:
+ m->creds.description = d->str;
+ m->creds.mask |= SD_BUS_CREDS_DESCRIPTION & bus->creds_mask;
+ break;
+
+ case KDBUS_ITEM_AUXGROUPS:
+
+ if (bus->creds_mask & SD_BUS_CREDS_SUPPLEMENTARY_GIDS) {
+ assert_cc(sizeof(gid_t) == sizeof(uint32_t));
+
+ m->creds.n_supplementary_gids = (d->size - offsetof(struct kdbus_item, data32)) / sizeof(uint32_t);
+ m->creds.supplementary_gids = (gid_t*) d->data32;
+ m->creds.mask |= SD_BUS_CREDS_SUPPLEMENTARY_GIDS;
+ }
+
break;
case KDBUS_ITEM_FDS:
}
}
+ /* If we requested the list of well-known names to be appended
+ * and the sender had none no item for it will be
+ * attached. However, this does *not* mean that the kernel
+ * didn't want to provide this information to us. Hence, let's
+ * explicitly mark this information as available if it was
+ * requested. */
+ m->creds.mask |= bus->creds_mask & SD_BUS_CREDS_WELL_KNOWN_NAMES;
+
r = bus_message_parse_fields(m);
if (r < 0)
goto fail;
+ /* Refuse messages if kdbus and dbus1 cookie doesn't match up */
+ if ((uint64_t) m->header->serial != k->cookie) {
+ r = -EBADMSG;
+ goto fail;
+ }
+
+ /* Refuse messages where the reply flag doesn't match up */
+ if (!(m->header->flags & BUS_MESSAGE_NO_REPLY_EXPECTED) != !!(k->flags & KDBUS_MSG_EXPECT_REPLY)) {
+ r = -EBADMSG;
+ goto fail;
+ }
+
+ /* Refuse reply messages where the reply cookie doesn't match up */
+ if ((m->header->flags & BUS_MESSAGE_NO_REPLY_EXPECTED) && m->reply_cookie != k->cookie_reply) {
+ r = -EBADMSG;
+ goto fail;
+ }
+
+ /* Refuse messages where the autostart flag doesn't match up */
+ if (!(m->header->flags & BUS_MESSAGE_NO_AUTO_START) != !(k->flags & KDBUS_MSG_NO_AUTO_START)) {
+ r = -EBADMSG;
+ goto fail;
+ }
+
/* 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";
+ bus_message_set_sender_driver(bus, m);
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;
}
int bus_kernel_take_fd(sd_bus *b) {
+ struct kdbus_bloom_parameter *bloom = NULL;
struct kdbus_cmd_hello *hello;
+ struct kdbus_item_list *items;
struct kdbus_item *item;
_cleanup_free_ char *g = NULL;
const char *name;
b->use_memfd = 1;
- if (b->connection_name) {
- g = bus_label_escape(b->connection_name);
+ if (b->description) {
+ g = bus_label_escape(b->description);
if (!g)
return -ENOMEM;
name = g;
}
- b->connection_name = bus_label_unescape(name);
- if (!b->connection_name)
+ b->description = bus_label_unescape(name);
+ if (!b->description)
return -ENOMEM;
}
if (b->fake_creds_valid)
sz += ALIGN8(offsetof(struct kdbus_item, creds) + sizeof(struct kdbus_creds));
+ if (b->fake_pids_valid)
+ sz += ALIGN8(offsetof(struct kdbus_item, pids) + sizeof(struct kdbus_pids));
+
if (b->fake_label) {
l = strlen(b->fake_label);
sz += ALIGN8(offsetof(struct kdbus_item, str) + l + 1);
hello = alloca0_align(sz, 8);
hello->size = sz;
- hello->conn_flags = b->hello_flags;
- hello->attach_flags = b->attach_flags;
+ hello->flags = b->hello_flags;
+ hello->attach_flags_send = _KDBUS_ATTACH_ANY;
+ hello->attach_flags_recv = b->attach_flags;
hello->pool_size = KDBUS_POOL_SIZE;
item = hello->items;
item->size = offsetof(struct kdbus_item, str) + m + 1;
- item->type = KDBUS_ITEM_CONN_NAME;
+ item->type = KDBUS_ITEM_CONN_DESCRIPTION;
memcpy(item->str, name, m + 1);
item = KDBUS_ITEM_NEXT(item);
item = KDBUS_ITEM_NEXT(item);
}
+ if (b->fake_pids_valid) {
+ item->size = offsetof(struct kdbus_item, pids) + sizeof(struct kdbus_pids);
+ item->type = KDBUS_ITEM_PIDS;
+ item->pids = b->fake_pids;
+
+ item = KDBUS_ITEM_NEXT(item);
+ }
+
if (b->fake_label) {
item->size = offsetof(struct kdbus_item, str) + l + 1;
item->type = KDBUS_ITEM_SECLABEL;
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;
+ r = -errno;
+ goto fail;
}
}
- /* The higher 32bit of both flags fields are considered
+ /* The higher 32bit of the bus_flags fields are considered
* 'incompatible flags'. Refuse them all for now. */
- if (hello->bus_flags > 0xFFFFFFFFULL ||
- hello->conn_flags > 0xFFFFFFFFULL)
- return -ENOTSUP;
+ if (hello->bus_flags > 0xFFFFFFFFULL) {
+ r = -ENOTSUP;
+ goto fail;
+ }
- if (!bloom_validate_parameters((size_t) hello->bloom.size, (unsigned) hello->bloom.n_hash))
- return -ENOTSUP;
+ /* extract bloom parameters from items */
+ items = (void*)((uint8_t*)b->kdbus_buffer + hello->offset);
+ KDBUS_ITEM_FOREACH(item, items, items) {
+ switch (item->type) {
+ case KDBUS_ITEM_BLOOM_PARAMETER:
+ bloom = &item->bloom_parameter;
+ break;
+ }
+ }
+
+ if (!bloom || !bloom_validate_parameters((size_t) bloom->size, (unsigned) bloom->n_hash)) {
+ r = -ENOTSUP;
+ goto fail;
+ }
- b->bloom_size = (size_t) hello->bloom.size;
- b->bloom_n_hash = (unsigned) hello->bloom.n_hash;
+ b->bloom_size = (size_t) bloom->size;
+ b->bloom_n_hash = (unsigned) bloom->n_hash;
- if (asprintf(&b->unique_name, ":1.%llu", (unsigned long long) hello->id) < 0)
- return -ENOMEM;
+ if (asprintf(&b->unique_name, ":1.%llu", (unsigned long long) hello->id) < 0) {
+ r = -ENOMEM;
+ goto fail;
+ }
b->unique_id = hello->id;
b->is_kernel = true;
b->bus_client = true;
- b->can_fds = !!(hello->conn_flags & KDBUS_HELLO_ACCEPT_FD);
+ b->can_fds = !!(hello->flags & KDBUS_HELLO_ACCEPT_FD);
b->message_version = 2;
b->message_endian = BUS_NATIVE_ENDIAN;
/* the kernel told us the UUID of the underlying bus */
memcpy(b->server_id.bytes, hello->id128, sizeof(b->server_id.bytes));
+ /* free returned items */
+ (void) bus_kernel_cmd_free(b, hello->offset);
return bus_start_running(b);
+
+fail:
+ (void) bus_kernel_cmd_free(b, hello->offset);
+ return r;
}
int bus_kernel_connect(sd_bus *b) {
return bus_kernel_take_fd(b);
}
+int bus_kernel_cmd_free(sd_bus *bus, uint64_t offset) {
+ struct kdbus_cmd_free cmd = {
+ .size = sizeof(cmd),
+ .offset = offset,
+ };
+ int r;
+
+ assert(bus);
+ assert(bus->is_kernel);
+
+ r = ioctl(bus->input_fd, KDBUS_CMD_FREE, &cmd);
+ if (r < 0)
+ return -errno;
+
+ return 0;
+}
+
static void close_kdbus_msg(sd_bus *bus, struct kdbus_msg *k) {
- struct kdbus_cmd_free cmd;
struct kdbus_item *d;
assert(bus);
assert(k);
- cmd.flags = 0;
- cmd.offset = (uint8_t *)k - (uint8_t *)bus->kdbus_buffer;
-
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)
safe_close(d->memfd.fd);
}
- (void) ioctl(bus->input_fd, KDBUS_CMD_FREE, &cmd);
+ bus_kernel_cmd_free(bus, (uint8_t*) k - (uint8_t*) bus->kdbus_buffer);
}
int bus_kernel_write_message(sd_bus *bus, sd_bus_message *m, bool hint_sync_call) {
+ struct kdbus_cmd_send cmd = { };
int r;
assert(bus);
if (r < 0)
return r;
+ cmd.size = sizeof(cmd);
+ cmd.msg_address = (uintptr_t)m->kdbus;
+
/* 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;
+ if (hint_sync_call) {
+ m->kdbus->flags |= KDBUS_MSG_EXPECT_REPLY;
+ cmd.flags |= KDBUS_SEND_SYNC_REPLY;
+ }
- r = ioctl(bus->output_fd, KDBUS_CMD_MSG_SEND, m->kdbus);
+ r = ioctl(bus->output_fd, KDBUS_CMD_SEND, &cmd);
if (r < 0) {
_cleanup_bus_error_free_ sd_bus_error error = SD_BUS_ERROR_NULL;
sd_bus_message *reply;
} else if (hint_sync_call) {
struct kdbus_msg *k;
- k = (struct kdbus_msg *)((uint8_t *)bus->kdbus_buffer + m->kdbus->offset_reply);
+ k = (struct kdbus_msg *)((uint8_t *)bus->kdbus_buffer + cmd.reply.offset);
assert(k);
if (k->payload_type == KDBUS_PAYLOAD_DBUS) {
/* Anybody can send us invalid messages, let's just drop them. */
if (r == -EBADMSG || r == -EPROTOTYPE)
- log_debug("Ignoring invalid message: %s", strerror(-r));
+ log_debug_errno(r, "Ignoring invalid message: %m");
else
return r;
}
return 1;
}
-static int push_name_owner_changed(sd_bus *bus, const char *name, const char *old_owner, const char *new_owner) {
+static int push_name_owner_changed(
+ sd_bus *bus,
+ const char *name,
+ const char *old_owner,
+ const char *new_owner,
+ const struct kdbus_timestamp *ts) {
+
_cleanup_bus_message_unref_ sd_bus_message *m = NULL;
int r;
if (r < 0)
return r;
- m->sender = "org.freedesktop.DBus";
+ bus_message_set_sender_driver(bus, m);
+ message_set_timestamp(bus, m, ts);
r = bus_seal_synthetic_message(bus, m);
if (r < 0)
return 1;
}
-static int translate_name_change(sd_bus *bus, struct kdbus_msg *k, struct kdbus_item *d) {
+static int translate_name_change(
+ sd_bus *bus,
+ const struct kdbus_msg *k,
+ const struct kdbus_item *d,
+ const struct kdbus_timestamp *ts) {
+
char new_owner[UNIQUE_NAME_MAX], old_owner[UNIQUE_NAME_MAX];
assert(bus);
} else
sprintf(new_owner, ":1.%llu", (unsigned long long) d->name_change.new_id.id);
- return push_name_owner_changed(bus, d->name_change.name, old_owner, new_owner);
+ return push_name_owner_changed(bus, d->name_change.name, old_owner, new_owner, ts);
}
-static int translate_id_change(sd_bus *bus, struct kdbus_msg *k, struct kdbus_item *d) {
+static int translate_id_change(
+ sd_bus *bus,
+ const struct kdbus_msg *k,
+ const struct kdbus_item *d,
+ const struct kdbus_timestamp *ts) {
+
char owner[UNIQUE_NAME_MAX];
assert(bus);
return push_name_owner_changed(
bus, owner,
d->type == KDBUS_ITEM_ID_ADD ? NULL : owner,
- d->type == KDBUS_ITEM_ID_ADD ? owner : NULL);
+ d->type == KDBUS_ITEM_ID_ADD ? owner : NULL,
+ ts);
}
-static int translate_reply(sd_bus *bus, struct kdbus_msg *k, struct kdbus_item *d) {
+static int translate_reply(
+ sd_bus *bus,
+ const struct kdbus_msg *k,
+ const struct kdbus_item *d,
+ const struct kdbus_timestamp *ts) {
+
_cleanup_bus_message_unref_ sd_bus_message *m = NULL;
int r;
if (r < 0)
return r;
- m->sender = "org.freedesktop.DBus";
+ message_set_timestamp(bus, m, ts);
r = bus_seal_synthetic_message(bus, m);
if (r < 0)
}
static int bus_kernel_translate_message(sd_bus *bus, struct kdbus_msg *k) {
- struct kdbus_item *d, *found = NULL;
-
- static int (* const translate[])(sd_bus *bus, struct kdbus_msg *k, struct kdbus_item *d) = {
+ static int (* const translate[])(sd_bus *bus, const struct kdbus_msg *k, const struct kdbus_item *d, const struct kdbus_timestamp *ts) = {
[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,
[KDBUS_ITEM_REPLY_DEAD - _KDBUS_ITEM_KERNEL_BASE] = translate_reply,
};
+ struct kdbus_item *d, *found = NULL;
+ struct kdbus_timestamp *ts = NULL;
+
assert(bus);
assert(k);
assert(k->payload_type == KDBUS_PAYLOAD_KERNEL);
KDBUS_ITEM_FOREACH(d, k, items) {
+ if (d->type == KDBUS_ITEM_TIMESTAMP)
+ ts = &d->timestamp;
+
if (d->type >= _KDBUS_ITEM_KERNEL_BASE && d->type < _KDBUS_ITEM_KERNEL_BASE + ELEMENTSOF(translate)) {
if (found)
return -EBADMSG;
return 0;
}
- return translate[found->type - _KDBUS_ITEM_KERNEL_BASE](bus, k, found);
+ return translate[found->type - _KDBUS_ITEM_KERNEL_BASE](bus, k, found, ts);
}
int bus_kernel_read_message(sd_bus *bus, bool hint_priority, int64_t priority) {
- struct kdbus_cmd_recv recv = {};
+ struct kdbus_cmd_recv recv = { .size = sizeof(recv) };
struct kdbus_msg *k;
int r;
recv.priority = priority;
}
- r = ioctl(bus->input_fd, KDBUS_CMD_MSG_RECV, &recv);
+ r = ioctl(bus->input_fd, KDBUS_CMD_RECV, &recv);
if (r < 0) {
if (errno == EAGAIN)
return 0;
+ if (errno == EOVERFLOW) {
+ log_debug("%s: kdbus reports %" PRIu64 " dropped broadcast messages, ignoring.", strna(bus->description), (uint64_t) recv.dropped_msgs);
+ return 0;
+ }
+
return -errno;
}
- k = (struct kdbus_msg *)((uint8_t *)bus->kdbus_buffer + recv.offset);
+ k = (struct kdbus_msg *)((uint8_t *)bus->kdbus_buffer + recv.msg.offset);
if (k->payload_type == KDBUS_PAYLOAD_DBUS) {
r = bus_kernel_make_message(bus, k);
/* Anybody can send us invalid messages, let's just drop them. */
if (r == -EBADMSG || r == -EPROTOTYPE) {
- log_debug("Ignoring invalid message: %s", strerror(-r));
+ log_debug_errno(r, "Ignoring invalid message: %m");
r = 0;
}
assert_se(pthread_mutex_lock(&bus->memfd_cache_mutex) >= 0);
if (bus->n_memfd_cache <= 0) {
- _cleanup_free_ char *g = NULL;
int r;
assert_se(pthread_mutex_unlock(&bus->memfd_cache_mutex) >= 0);
- assert(bus->connection_name);
-
- g = bus_label_escape(bus->connection_name);
- if (!g)
- return -ENOMEM;
-
- r = memfd_create(g, MFD_ALLOW_SEALING);
+ r = memfd_new(bus->description);
if (r < 0)
- return -errno;
+ return r;
*address = NULL;
*mapped = 0;
/* If overly long, let's return a bit to the OS */
if (mapped > max_mapped) {
- assert_se(ftruncate(fd, max_mapped) >= 0);
+ assert_se(memfd_set_size(fd, max_mapped) >= 0);
assert_se(munmap((uint8_t*) address + max_mapped, PAGE_ALIGN(mapped - max_mapped)) >= 0);
c->mapped = c->allocated = max_mapped;
} else {
close_and_munmap(b->memfd_cache[i].fd, b->memfd_cache[i].address, b->memfd_cache[i].mapped);
}
-int kdbus_translate_request_name_flags(uint64_t flags, uint64_t *kdbus_flags) {
+uint64_t request_name_flags_to_kdbus(uint64_t flags) {
uint64_t f = 0;
- assert(kdbus_flags);
-
if (flags & SD_BUS_NAME_ALLOW_REPLACEMENT)
f |= KDBUS_NAME_ALLOW_REPLACEMENT;
if (flags & SD_BUS_NAME_QUEUE)
f |= KDBUS_NAME_QUEUE;
- *kdbus_flags = f;
- return 0;
+ return f;
}
-int kdbus_translate_attach_flags(uint64_t mask, uint64_t *kdbus_mask) {
+uint64_t attach_flags_to_kdbus(uint64_t 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))
+ if (mask & (SD_BUS_CREDS_UID|SD_BUS_CREDS_EUID|SD_BUS_CREDS_SUID|SD_BUS_CREDS_FSUID|
+ SD_BUS_CREDS_GID|SD_BUS_CREDS_EGID|SD_BUS_CREDS_SGID|SD_BUS_CREDS_FSGID))
m |= KDBUS_ATTACH_CREDS;
- if (mask & (SD_BUS_CREDS_COMM|SD_BUS_CREDS_TID_COMM))
- m |= KDBUS_ATTACH_COMM;
+ if (mask & (SD_BUS_CREDS_PID|SD_BUS_CREDS_TID))
+ m |= KDBUS_ATTACH_PIDS;
+
+ if (mask & SD_BUS_CREDS_COMM)
+ m |= KDBUS_ATTACH_PID_COMM;
+
+ if (mask & SD_BUS_CREDS_TID_COMM)
+ m |= KDBUS_ATTACH_TID_COMM;
if (mask & SD_BUS_CREDS_EXE)
m |= KDBUS_ATTACH_EXE;
if (mask & SD_BUS_CREDS_WELL_KNOWN_NAMES)
m |= KDBUS_ATTACH_NAMES;
- if (mask & SD_BUS_CREDS_CONNECTION_NAME)
- m |= KDBUS_ATTACH_CONN_NAME;
+ if (mask & SD_BUS_CREDS_DESCRIPTION)
+ m |= KDBUS_ATTACH_CONN_DESCRIPTION;
- *kdbus_mask = m;
- return 0;
+ if (mask & SD_BUS_CREDS_SUPPLEMENTARY_GIDS)
+ m |= KDBUS_ATTACH_AUXGROUPS;
+
+ return m;
}
int bus_kernel_create_bus(const char *name, bool world, char **s) {
- struct kdbus_cmd_make *make;
+ struct kdbus_cmd *make;
struct kdbus_item *n;
+ size_t l;
int fd;
assert(name);
assert(s);
- fd = open("/dev/kdbus/control", O_RDWR|O_NOCTTY|O_CLOEXEC);
+ fd = open("/sys/fs/kdbus/control", O_RDWR|O_NOCTTY|O_CLOEXEC);
if (fd < 0)
return -errno;
- make = alloca0_align(ALIGN8(offsetof(struct kdbus_cmd_make, items) +
- offsetof(struct kdbus_item, data64) + sizeof(uint64_t) +
- offsetof(struct kdbus_item, str) +
- DECIMAL_STR_MAX(uid_t) + 1 + strlen(name) + 1),
+ l = strlen(name);
+ make = alloca0_align(offsetof(struct kdbus_cmd, items) +
+ ALIGN8(offsetof(struct kdbus_item, bloom_parameter) + sizeof(struct kdbus_bloom_parameter)) +
+ ALIGN8(offsetof(struct kdbus_item, data64) + sizeof(uint64_t)) +
+ ALIGN8(offsetof(struct kdbus_item, data64) + sizeof(uint64_t)) +
+ ALIGN8(offsetof(struct kdbus_item, str) + DECIMAL_STR_MAX(uid_t) + 1 + l + 1),
8);
- make->size = offsetof(struct kdbus_cmd_make, items);
+ make->size = offsetof(struct kdbus_cmd, items);
+ /* Set the bloom parameters */
n = make->items;
n->size = offsetof(struct kdbus_item, bloom_parameter) +
sizeof(struct kdbus_bloom_parameter);
n->type = KDBUS_ITEM_BLOOM_PARAMETER;
-
n->bloom_parameter.size = DEFAULT_BLOOM_SIZE;
n->bloom_parameter.n_hash = DEFAULT_BLOOM_N_HASH;
make->size += ALIGN8(n->size);
+ /* The busses we create make no restrictions on what metadata
+ * peers can read from incoming messages. */
+ n = KDBUS_ITEM_NEXT(n);
+ n->type = KDBUS_ITEM_ATTACH_FLAGS_RECV;
+ n->size = offsetof(struct kdbus_item, data64) + sizeof(uint64_t);
+ n->data64[0] = _KDBUS_ATTACH_ANY;
+ make->size += ALIGN8(n->size);
+
+ /* Provide all metadata via bus-owner queries */
+ n = KDBUS_ITEM_NEXT(n);
+ n->type = KDBUS_ITEM_ATTACH_FLAGS_SEND;
+ n->size = offsetof(struct kdbus_item, data64) + sizeof(uint64_t);
+ n->data64[0] = _KDBUS_ATTACH_ANY;
+ make->size += ALIGN8(n->size);
+
+ /* Set the a good name */
n = KDBUS_ITEM_NEXT(n);
sprintf(n->str, UID_FMT "-%s", getuid(), name);
n->size = offsetof(struct kdbus_item, str) + strlen(n->str) + 1;
return -errno;
}
- /* The features field are considered 'incompatible flags'.
- * Refuse them all for now. */
- if (make->features) {
- safe_close(fd);
- return -ENOTSUP;
- }
-
if (s) {
char *p;
- p = strjoin("/dev/kdbus/", n->str, "/bus", NULL);
+ p = strjoin("/sys/fs/kdbus/", n->str, "/bus", NULL);
if (!p) {
safe_close(fd);
return -ENOMEM;
return fd;
}
-static int bus_kernel_translate_access(BusPolicyAccess access) {
- assert(access >= 0);
- assert(access < _BUS_POLICY_ACCESS_MAX);
-
- switch (access) {
-
- case BUS_POLICY_ACCESS_SEE:
- return KDBUS_POLICY_SEE;
-
- case BUS_POLICY_ACCESS_TALK:
- return KDBUS_POLICY_TALK;
-
- case BUS_POLICY_ACCESS_OWN:
- return KDBUS_POLICY_OWN;
-
- default:
- assert_not_reached("Unknown policy access");
- }
-}
-
-static int bus_kernel_translate_policy(const BusNamePolicy *policy, struct kdbus_item *item) {
- int r;
-
- assert(policy);
- assert(item);
-
- switch (policy->type) {
-
- case BUSNAME_POLICY_TYPE_USER: {
- const char *user = policy->name;
- uid_t uid;
-
- r = get_user_creds(&user, &uid, NULL, NULL, NULL);
- if (r < 0)
- return r;
-
- item->policy_access.type = KDBUS_POLICY_ACCESS_USER;
- item->policy_access.id = uid;
- break;
- }
-
- case BUSNAME_POLICY_TYPE_GROUP: {
- const char *group = policy->name;
- gid_t gid;
-
- r = get_group_creds(&group, &gid);
- if (r < 0)
- return r;
-
- item->policy_access.type = KDBUS_POLICY_ACCESS_GROUP;
- item->policy_access.id = gid;
- break;
- }
-
- default:
- assert_not_reached("Unknown policy type");
- }
-
- item->policy_access.access = bus_kernel_translate_access(policy->access);
-
- return 0;
-}
-
int bus_kernel_open_bus_fd(const char *bus, char **path) {
char *p;
int fd;
size_t len;
- len = strlen("/dev/kdbus/") + DECIMAL_STR_MAX(uid_t) + 1 + strlen(bus) + strlen("/bus") + 1;
+ assert(bus);
+
+ len = strlen("/sys/fs/kdbus/") + DECIMAL_STR_MAX(uid_t) + 1 + strlen(bus) + strlen("/bus") + 1;
if (path) {
- p = malloc(len);
+ p = new(char, len);
if (!p)
return -ENOMEM;
- *path = p;
} else
- p = alloca(len);
- sprintf(p, "/dev/kdbus/" UID_FMT "-%s/bus", getuid(), bus);
+ p = newa(char, len);
+
+ sprintf(p, "/sys/fs/kdbus/" UID_FMT "-%s/bus", getuid(), bus);
fd = open(p, O_RDWR|O_NOCTTY|O_CLOEXEC);
- if (fd < 0)
+ if (fd < 0) {
+ if (path)
+ free(p);
+
return -errno;
+ }
+
+ if (path)
+ *path = p;
return fd;
}
int bus_kernel_create_endpoint(const char *bus_name, const char *ep_name, char **ep_path) {
_cleanup_free_ char *path = NULL;
- struct kdbus_cmd_make *make;
+ struct kdbus_cmd *make;
struct kdbus_item *n;
- size_t size;
+ const char *name;
int fd;
fd = bus_kernel_open_bus_fd(bus_name, &path);
if (fd < 0)
return fd;
- size = ALIGN8(offsetof(struct kdbus_cmd_make, items));
- size += ALIGN8(offsetof(struct kdbus_item, str) + strlen(ep_name) + 1);
-
- make = alloca0_align(size, 8);
- make->size = size;
+ make = alloca0_align(ALIGN8(offsetof(struct kdbus_cmd, items)) +
+ ALIGN8(offsetof(struct kdbus_item, str) + DECIMAL_STR_MAX(uid_t) + 1 + strlen(ep_name) + 1),
+ 8);
+ make->size = ALIGN8(offsetof(struct kdbus_cmd, items));
make->flags = KDBUS_MAKE_ACCESS_WORLD;
n = make->items;
-
+ sprintf(n->str, UID_FMT "-%s", getuid(), ep_name);
+ n->size = offsetof(struct kdbus_item, str) + strlen(n->str) + 1;
n->type = KDBUS_ITEM_MAKE_NAME;
- n->size = offsetof(struct kdbus_item, str) + strlen(ep_name) + 1;
- strcpy(n->str, ep_name);
+ make->size += ALIGN8(n->size);
+ name = n->str;
if (ioctl(fd, KDBUS_CMD_ENDPOINT_MAKE, make) < 0) {
safe_close(fd);
return -errno;
}
- /* The features field are considered 'incompatible flags'.
- * Refuse them all for now. */
- if (make->features) {
- safe_close(fd);
- return -ENOTSUP;
- }
-
if (ep_path) {
char *p;
- p = strjoin(dirname(path), "/", ep_name, NULL);
+ p = strjoin(dirname(path), "/", name, NULL);
if (!p) {
safe_close(fd);
return -ENOMEM;
return fd;
}
-int bus_kernel_set_endpoint_policy(int fd, uid_t uid, BusEndpoint *ep) {
-
- struct kdbus_cmd_update *update;
- struct kdbus_item *n;
- BusEndpointPolicy *po;
- Iterator i;
- size_t size;
- int r;
-
- size = ALIGN8(offsetof(struct kdbus_cmd_update, items));
-
- HASHMAP_FOREACH(po, ep->policy_hash, i) {
- size += ALIGN8(offsetof(struct kdbus_item, str) + strlen(po->name) + 1);
- size += ALIGN8(offsetof(struct kdbus_item, policy_access) + sizeof(struct kdbus_policy_access));
- }
-
- update = alloca0_align(size, 8);
- update->size = size;
-
- n = update->items;
-
- HASHMAP_FOREACH(po, ep->policy_hash, i) {
- n->type = KDBUS_ITEM_NAME;
- n->size = offsetof(struct kdbus_item, str) + strlen(po->name) + 1;
- strcpy(n->str, po->name);
- n = KDBUS_ITEM_NEXT(n);
-
- n->type = KDBUS_ITEM_POLICY_ACCESS;
- n->size = offsetof(struct kdbus_item, policy_access) + sizeof(struct kdbus_policy_access);
-
- n->policy_access.type = KDBUS_POLICY_ACCESS_USER;
- n->policy_access.access = bus_kernel_translate_access(po->access);
- n->policy_access.id = uid;
+int bus_kernel_try_close(sd_bus *bus) {
+ struct kdbus_cmd byebye = { .size = sizeof(byebye) };
- n = KDBUS_ITEM_NEXT(n);
- }
+ assert(bus);
+ assert(bus->is_kernel);
- r = ioctl(fd, KDBUS_CMD_ENDPOINT_UPDATE, update);
- if (r < 0)
+ if (ioctl(bus->input_fd, KDBUS_CMD_BYEBYE, &byebye) < 0)
return -errno;
return 0;
}
-int bus_kernel_make_starter(
- int fd,
- const char *name,
- bool activating,
- bool accept_fd,
- BusNamePolicy *policy,
- BusPolicyAccess world_policy) {
-
- struct kdbus_cmd_hello *hello;
- struct kdbus_item *n;
- size_t policy_cnt = 0;
- BusNamePolicy *po;
- size_t size;
- int r;
+int bus_kernel_drop_one(int fd) {
+ struct kdbus_cmd_recv recv = {
+ .size = sizeof(recv),
+ .flags = KDBUS_RECV_DROP,
+ };
assert(fd >= 0);
- assert(name);
-
- LIST_FOREACH(policy, po, policy)
- policy_cnt++;
-
- if (world_policy >= 0)
- 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_align(size, 8);
-
- n = hello->items;
- strcpy(n->str, name);
- n->size = offsetof(struct kdbus_item, str) + strlen(n->str) + 1;
- n->type = KDBUS_ITEM_NAME;
- 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);
-
- r = bus_kernel_translate_policy(po, n);
- if (r < 0)
- return r;
-
- n = KDBUS_ITEM_NEXT(n);
- }
-
- if (world_policy >= 0) {
- n->type = KDBUS_ITEM_POLICY_ACCESS;
- n->size = offsetof(struct kdbus_item, policy_access) + sizeof(struct kdbus_policy_access);
- n->policy_access.type = KDBUS_POLICY_ACCESS_WORLD;
- n->policy_access.access = bus_kernel_translate_access(world_policy);
- }
-
- hello->size = size;
- hello->conn_flags =
- (activating ? KDBUS_HELLO_ACTIVATOR : KDBUS_HELLO_POLICY_HOLDER) |
- (accept_fd ? KDBUS_HELLO_ACCEPT_FD : 0);
- hello->pool_size = KDBUS_POOL_SIZE;
- hello->attach_flags = _KDBUS_ATTACH_ALL;
- if (ioctl(fd, KDBUS_CMD_HELLO, hello) < 0)
+ if (ioctl(fd, KDBUS_CMD_RECV, &recv) < 0)
return -errno;
- /* The higher 32bit of both flags fields are considered
- * 'incompatible flags'. Refuse them all for now. */
- if (hello->features ||
- hello->bus_flags > 0xFFFFFFFFULL ||
- hello->conn_flags > 0xFFFFFFFFULL)
- return -ENOTSUP;
-
- if (!bloom_validate_parameters((size_t) hello->bloom.size, (unsigned) hello->bloom.n_hash))
- return -ENOTSUP;
-
- return fd;
+ return 0;
}
-int bus_kernel_create_domain(const char *name, char **s) {
- struct kdbus_cmd_make *make;
+int bus_kernel_realize_attach_flags(sd_bus *bus) {
+ struct kdbus_cmd *update;
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;
+ assert(bus);
+ assert(bus->is_kernel);
- make = alloca0_align(ALIGN8(offsetof(struct kdbus_cmd_make, items) +
- offsetof(struct kdbus_item, str) +
- strlen(name) + 1),
- 8);
+ update = alloca0_align(offsetof(struct kdbus_cmd, items) +
+ ALIGN8(offsetof(struct kdbus_item, data64) + sizeof(uint64_t)),
+ 8);
- n = make->items;
- strcpy(n->str, name);
- n->size = offsetof(struct kdbus_item, str) + strlen(n->str) + 1;
- n->type = KDBUS_ITEM_MAKE_NAME;
+ n = update->items;
+ n->type = KDBUS_ITEM_ATTACH_FLAGS_RECV;
+ n->size = offsetof(struct kdbus_item, data64) + sizeof(uint64_t);
+ n->data64[0] = bus->attach_flags;
- make->size = ALIGN8(offsetof(struct kdbus_cmd_make, items) + n->size);
- make->flags = KDBUS_MAKE_ACCESS_WORLD;
+ update->size =
+ offsetof(struct kdbus_cmd, items) +
+ ALIGN8(n->size);
- if (ioctl(fd, KDBUS_CMD_DOMAIN_MAKE, make) < 0) {
- safe_close(fd);
+ if (ioctl(bus->input_fd, KDBUS_CMD_UPDATE, update) < 0)
return -errno;
- }
- /* The higher 32bit of the flags field are considered
- * 'incompatible flags'. Refuse them all for now. */
- if (make->flags > 0xFFFFFFFFULL) {
- safe_close(fd);
- return -ENOTSUP;
- }
+ return 0;
+}
- if (s) {
- char *p;
+int bus_kernel_fix_attach_mask(void) {
+ _cleanup_free_ char *mask = NULL;
+ uint64_t m = (uint64_t) -1;
+ char buf[2+16+2];
+ int r;
- p = strappend("/dev/kdbus/domain/", name);
- if (!p) {
- safe_close(fd);
- return -ENOMEM;
- }
+ /* By default we don't want any kdbus metadata fields to be
+ * suppressed, hence we reset the kernel mask for it to
+ * (uint64_t) -1. If the module argument was overwritten by
+ * the kernel cmdline, we leave it as is. */
- *s = p;
+ r = get_proc_cmdline_key("kdbus.attach_flags_mask=", &mask);
+ if (r < 0)
+ return log_warning_errno(r, "Failed to read kernel command line: %m");
+
+ if (r == 0) {
+ sprintf(buf, "0x%" PRIx64 "\n", m);
+ r = write_string_file("/sys/module/kdbus/parameters/attach_flags_mask", buf);
+ if (r < 0)
+ return log_full_errno(IN_SET(r, -ENOENT, -EROFS) ? LOG_DEBUG : LOG_WARNING, r,
+ "Failed to write kdbus attach mask: %m");
}
- return fd;
+ return 0;
}
-int bus_kernel_try_close(sd_bus *bus) {
+int bus_kernel_get_bus_name(sd_bus *bus, char **name) {
+ struct kdbus_cmd_info cmd = {
+ .size = sizeof(struct kdbus_cmd_info),
+ };
+ struct kdbus_info *info;
+ struct kdbus_item *item;
+ char *n = NULL;
+ int r;
+
assert(bus);
+ assert(name);
assert(bus->is_kernel);
- if (ioctl(bus->input_fd, KDBUS_CMD_BYEBYE) < 0)
+ r = ioctl(bus->input_fd, KDBUS_CMD_BUS_CREATOR_INFO, &cmd);
+ if (r < 0)
return -errno;
- return 0;
-}
+ info = (struct kdbus_info*) ((uint8_t*) bus->kdbus_buffer + cmd.offset);
-int bus_kernel_drop_one(int fd) {
- struct kdbus_cmd_recv recv = {
- .flags = KDBUS_RECV_DROP
- };
+ KDBUS_ITEM_FOREACH(item, info, items)
+ if (item->type == KDBUS_ITEM_MAKE_NAME) {
+ r = free_and_strdup(&n, item->str);
+ break;
+ }
- assert(fd >= 0);
+ bus_kernel_cmd_free(bus, cmd.offset);
- if (ioctl(fd, KDBUS_CMD_MSG_RECV, &recv) < 0)
- return -errno;
+ if (r < 0)
+ return r;
+ if (!n)
+ return -EIO;
+ *name = n;
return 0;
}
~ianmdlvl / elogind.git / blobdiff