#include "bus-message.h"
#include "bus-kernel.h"
#include "bus-bloom.h"
+#include "bus-util.h"
-#define KDBUS_ITEM_NEXT(item) \
- (typeof(item))(((uint8_t *)item) + ALIGN8((item)->size))
+#define UNIQUE_NAME_MAX (3+DECIMAL_STR_MAX(uint64_t))
-#define KDBUS_ITEM_FOREACH(item, head) \
- for (item = (head)->items; \
- (uint8_t *)(item) < (uint8_t *)(head) + (head)->size; \
- item = KDBUS_ITEM_NEXT(item))
-
-#define KDBUS_ITEM_HEADER_SIZE offsetof(struct kdbus_item, data)
-#define KDBUS_ITEM_SIZE(s) ALIGN8((s) + KDBUS_ITEM_HEADER_SIZE)
-
-#define KDBUS_POOL_SIZE (4*1024*1024)
-
-static int parse_unique_name(const char *s, uint64_t *id) {
+int bus_kernel_parse_unique_name(const char *s, uint64_t *id) {
int r;
assert(s);
* conditions */
(*d)->size = offsetof(struct kdbus_item, vec) + sizeof(struct kdbus_vec);
- (*d)->type = KDBUS_MSG_PAYLOAD_VEC;
+ (*d)->type = KDBUS_ITEM_PAYLOAD_VEC;
(*d)->vec.address = PTR_TO_UINT64(p);
(*d)->vec.size = sz;
*d = ALIGN8_PTR(*d);
(*d)->size = offsetof(struct kdbus_item, memfd) + sizeof(struct kdbus_memfd);
- (*d)->type = KDBUS_MSG_PAYLOAD_MEMFD;
+ (*d)->type = KDBUS_ITEM_PAYLOAD_MEMFD;
(*d)->memfd.fd = memfd;
(*d)->memfd.size = sz;
*d = ALIGN8_PTR(*d);
(*d)->size = offsetof(struct kdbus_item, str) + length + 1;
- (*d)->type = KDBUS_MSG_DST_NAME;
+ (*d)->type = KDBUS_ITEM_DST_NAME;
memcpy((*d)->str, s, length + 1);
*d = (struct kdbus_item *) ((uint8_t*) *d + (*d)->size);
*d = ALIGN8_PTR(*d);
(*d)->size = offsetof(struct kdbus_item, data) + length;
- (*d)->type = KDBUS_MSG_BLOOM;
+ (*d)->type = KDBUS_ITEM_BLOOM;
r = (*d)->data;
*d = (struct kdbus_item *) ((uint8_t*) *d + (*d)->size);
*d = ALIGN8_PTR(*d);
(*d)->size = offsetof(struct kdbus_item, fds) + sizeof(int) * n_fds;
- (*d)->type = KDBUS_MSG_FDS;
+ (*d)->type = KDBUS_ITEM_FDS;
memcpy((*d)->fds, fds, sizeof(int) * n_fds);
*d = (struct kdbus_item *) ((uint8_t*) *d + (*d)->size);
bloom_add_pair(bloom, "member", m->member);
if (m->path) {
bloom_add_pair(bloom, "path", m->path);
+ bloom_add_pair(bloom, "path-slash-prefix", m->path);
bloom_add_prefixes(bloom, "path-slash-prefix", m->path, '/');
}
return 0;
if (m->destination) {
- r = parse_unique_name(m->destination, &unique);
+ r = bus_kernel_parse_unique_name(m->destination, &unique);
if (r < 0)
return r;
}
int bus_kernel_take_fd(sd_bus *b) {
- uint8_t h[ALIGN8(sizeof(struct kdbus_cmd_hello)) +
- ALIGN8(KDBUS_ITEM_HEADER_SIZE) +
- ALIGN8(sizeof(struct kdbus_vec))] = {};
-
- struct kdbus_cmd_hello *hello = (struct kdbus_cmd_hello*) h;
-
+ struct kdbus_cmd_hello hello;
int r;
assert(b);
if (b->is_server)
return -EINVAL;
+ b->use_memfd = 1;
+
+ zero(hello);
+ hello.size = sizeof(hello);
+ hello.conn_flags = b->hello_flags;
+ hello.attach_flags = b->attach_flags;
+ hello.pool_size = KDBUS_POOL_SIZE;
+
+ r = ioctl(b->input_fd, KDBUS_CMD_HELLO, &hello);
+ if (r < 0)
+ return -errno;
+
if (!b->kdbus_buffer) {
- b->kdbus_buffer = mmap(NULL, KDBUS_POOL_SIZE, PROT_READ|PROT_WRITE, MAP_ANONYMOUS|MAP_PRIVATE, -1, 0);
+ 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;
}
}
- hello->size = sizeof(h);
- hello->conn_flags =
- KDBUS_HELLO_ACCEPT_FD|
- KDBUS_HELLO_ATTACH_COMM|
- KDBUS_HELLO_ATTACH_EXE|
- KDBUS_HELLO_ATTACH_CMDLINE|
- KDBUS_HELLO_ATTACH_CGROUP|
- KDBUS_HELLO_ATTACH_CAPS|
- KDBUS_HELLO_ATTACH_SECLABEL|
- KDBUS_HELLO_ATTACH_AUDIT;
-
- hello->items[0].type = KDBUS_HELLO_POOL;
- hello->items[0].size = KDBUS_ITEM_HEADER_SIZE + sizeof(struct kdbus_vec);
- hello->items[0].vec.address = (uint64_t) b->kdbus_buffer;
- hello->items[0].vec.size = KDBUS_POOL_SIZE;
-
- r = ioctl(b->input_fd, KDBUS_CMD_HELLO, hello);
- if (r < 0)
- 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)
+ if (hello.bus_flags > 0xFFFFFFFFULL ||
+ hello.conn_flags > 0xFFFFFFFFULL)
return -ENOTSUP;
- if (hello->bloom_size != BLOOM_SIZE)
+ if (hello.bloom_size != BLOOM_SIZE)
return -ENOTSUP;
- if (asprintf(&b->unique_name, ":1.%llu", (unsigned long long) hello->id) < 0)
+ if (asprintf(&b->unique_name, ":1.%llu", (unsigned long long) hello.id) < 0)
return -ENOMEM;
+ b->unique_id = hello.id;
+
b->is_kernel = true;
b->bus_client = true;
- b->can_fds = true;
+ b->can_fds = !!(hello.conn_flags & KDBUS_HELLO_ACCEPT_FD);
- r = bus_start_running(b);
- if (r < 0)
- return r;
+ /* the kernel told us the UUID of the underlying bus */
+ memcpy(b->server_id.bytes, hello.id128, sizeof(b->server_id.bytes));
- return 1;
+ return bus_start_running(b);
}
int bus_kernel_connect(sd_bus *b) {
assert(m);
assert(bus->state == BUS_RUNNING);
+ /* If we can't deliver, we want room for the error message */
+ r = bus_rqueue_make_room(bus);
+ if (r < 0)
+ return r;
+
r = bus_message_setup_kmsg(bus, m);
if (r < 0)
return r;
r = ioctl(bus->output_fd, KDBUS_CMD_MSG_SEND, m->kdbus);
- if (r < 0)
- return errno == EAGAIN ? 0 : -errno;
+ if (r < 0) {
+ _cleanup_bus_error_free_ sd_bus_error error = SD_BUS_ERROR_NULL;
+ sd_bus_message *reply;
+
+ if (errno == EAGAIN || errno == EINTR)
+ return 0;
+ else if (errno == ENXIO || errno == ESRCH) {
+
+ /* ENXIO: unique name not known
+ * ESRCH: well-known name not known */
+
+ 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
+ return 0;
+
+ } else if (errno == EADDRNOTAVAIL) {
+
+ /* EADDRNOTAVAIL: activation is possible, but turned off in request flags */
+
+ 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
+ return 0;
+ } else
+ return -errno;
+
+ r = bus_message_new_synthetic_error(
+ bus,
+ BUS_MESSAGE_SERIAL(m),
+ &error,
+ &reply);
+
+ if (r < 0)
+ return r;
+
+ r = bus_seal_synthetic_message(bus, reply);
+ if (r < 0)
+ return r;
+
+ bus->rqueue[bus->rqueue_size++] = reply;
+
+ return 0;
+ }
return 1;
}
static void close_kdbus_msg(sd_bus *bus, struct kdbus_msg *k) {
+ uint64_t off;
struct kdbus_item *d;
assert(bus);
assert(k);
- ioctl(bus->input_fd, KDBUS_CMD_MSG_RELEASE, k);
+ off = (uint8_t *)k - (uint8_t *)bus->kdbus_buffer;
+ ioctl(bus->input_fd, KDBUS_CMD_MSG_RELEASE, &off);
- KDBUS_ITEM_FOREACH(d, k) {
+ KDBUS_PART_FOREACH(d, k, items) {
- if (d->type == KDBUS_MSG_FDS)
+ if (d->type == KDBUS_ITEM_FDS)
close_many(d->fds, (d->size - offsetof(struct kdbus_item, fds)) / sizeof(int));
- else if (d->type == KDBUS_MSG_PAYLOAD_MEMFD)
+ else if (d->type == KDBUS_ITEM_PAYLOAD_MEMFD)
close_nointr_nofail(d->memfd.fd);
}
}
-static int bus_kernel_make_message(sd_bus *bus, struct kdbus_msg *k, sd_bus_message **ret) {
+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;
+
+ assert(bus);
+
+ r = sd_bus_message_new_signal(
+ bus,
+ "/org/freedesktop/DBus",
+ "org.freedesktop.DBus",
+ "NameOwnerChanged",
+ &m);
+ if (r < 0)
+ return r;
+
+ r = sd_bus_message_append(m, "sss", name, old_owner, new_owner);
+ if (r < 0)
+ return r;
+
+ m->sender = "org.freedesktop.DBus";
+
+ r = bus_seal_synthetic_message(bus, m);
+ if (r < 0)
+ return r;
+
+ bus->rqueue[bus->rqueue_size++] = m;
+ m = NULL;
+
+ return 1;
+}
+
+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];
+
+ assert(bus);
+ assert(k);
+ assert(d);
+
+ if (d->name_change.flags != 0)
+ return 0;
+
+ if (d->type == KDBUS_ITEM_NAME_ADD)
+ old_owner[0] = 0;
+ else
+ sprintf(old_owner, ":1.%llu", (unsigned long long) d->name_change.old_id);
+
+ if (d->type == KDBUS_ITEM_NAME_REMOVE)
+ new_owner[0] = 0;
+ else
+ sprintf(new_owner, ":1.%llu", (unsigned long long) d->name_change.new_id);
+
+ return push_name_owner_changed(bus, d->name_change.name, old_owner, new_owner);
+}
+
+static int translate_id_change(sd_bus *bus, struct kdbus_msg *k, struct kdbus_item *d) {
+ char owner[UNIQUE_NAME_MAX];
+
+ assert(bus);
+ assert(k);
+ assert(d);
+
+ sprintf(owner, ":1.%llu", d->id_change.id);
+
+ return push_name_owner_changed(
+ bus, owner,
+ d->type == KDBUS_ITEM_ID_ADD ? NULL : owner,
+ d->type == KDBUS_ITEM_ID_ADD ? owner : NULL);
+}
+
+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;
+
+ assert(bus);
+ assert(k);
+ assert(d);
+
+ 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);
+ if (r < 0)
+ return r;
+
+ m->sender = "org.freedesktop.DBus";
+
+ r = bus_seal_synthetic_message(bus, m);
+ if (r < 0)
+ return r;
+
+ bus->rqueue[bus->rqueue_size++] = m;
+ m = NULL;
+
+ return 1;
+}
+
+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) = {
+ [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_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_PART_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);
+ }
+
+ 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);
+}
+
+int kdbus_translate_attach_flags(uint64_t mask, uint64_t *kdbus_mask) {
+
+ uint64_t m = 0;
+
+ SET_FLAG(m, KDBUS_ATTACH_CREDS,
+ !!(mask & (SD_BUS_CREDS_UID|SD_BUS_CREDS_GID|SD_BUS_CREDS_PID|SD_BUS_CREDS_PID_STARTTIME|SD_BUS_CREDS_TID)));
+
+ SET_FLAG(m, KDBUS_ATTACH_COMM,
+ !!(mask & (SD_BUS_CREDS_COMM|SD_BUS_CREDS_TID_COMM)));
+
+ SET_FLAG(m, KDBUS_ATTACH_EXE,
+ !!(mask & SD_BUS_CREDS_EXE));
+
+ SET_FLAG(m, KDBUS_ATTACH_CMDLINE,
+ !!(mask & SD_BUS_CREDS_CMDLINE));
+
+ SET_FLAG(m, KDBUS_ATTACH_CGROUP,
+ !!(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)));
+
+ SET_FLAG(m, KDBUS_ATTACH_CAPS,
+ !!(mask & (SD_BUS_CREDS_EFFECTIVE_CAPS|SD_BUS_CREDS_PERMITTED_CAPS|SD_BUS_CREDS_INHERITABLE_CAPS|SD_BUS_CREDS_BOUNDING_CAPS)));
+
+ SET_FLAG(m, KDBUS_ATTACH_SECLABEL,
+ !!(mask & SD_BUS_CREDS_SELINUX_CONTEXT));
+
+ SET_FLAG(m, KDBUS_ATTACH_AUDIT,
+ !!(mask & (SD_BUS_CREDS_AUDIT_SESSION_ID|SD_BUS_CREDS_AUDIT_LOGIN_UID)));
+
+ *kdbus_mask = m;
+
+ return 0;
+}
+
+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;
assert(bus);
assert(k);
- assert(ret);
-
- if (k->payload_type != KDBUS_PAYLOAD_DBUS1)
- return 0;
+ assert(k->payload_type == KDBUS_PAYLOAD_DBUS1);
- KDBUS_ITEM_FOREACH(d, k) {
+ KDBUS_PART_FOREACH(d, k, items) {
size_t l;
l = d->size - offsetof(struct kdbus_item, data);
- if (d->type == KDBUS_MSG_PAYLOAD_VEC) {
+ switch (d->type) {
+ case KDBUS_ITEM_PAYLOAD_OFF:
if (!h) {
- h = UINT64_TO_PTR(d->vec.address);
+ h = (struct bus_header *)((uint8_t *)bus->kdbus_buffer + d->vec.offset);
if (!bus_header_is_complete(h, d->vec.size))
return -EBADMSG;
}
n_bytes += d->vec.size;
+ break;
- } else if (d->type == KDBUS_MSG_PAYLOAD_MEMFD) {
-
+ case KDBUS_ITEM_PAYLOAD_MEMFD:
if (!h)
return -EBADMSG;
n_bytes += d->memfd.size;
+ break;
- } else if (d->type == KDBUS_MSG_FDS) {
+ case KDBUS_ITEM_FDS: {
int *f;
unsigned j;
fds = f;
memcpy(fds + n_fds, d->fds, sizeof(int) * j);
n_fds += j;
+ break;
+ }
- } else if (d->type == KDBUS_MSG_SRC_SECLABEL)
+ case KDBUS_ITEM_SECLABEL:
seclabel = d->str;
+ break;
+ }
}
if (!h)
if (n_bytes != total)
return -EBADMSG;
- r = bus_message_from_header(h, sizeof(struct bus_header), fds, n_fds, NULL, seclabel, 0, &m);
+ r = bus_message_from_header(bus, h, sizeof(struct bus_header), fds, n_fds, NULL, seclabel, 0, &m);
if (r < 0)
return r;
- KDBUS_ITEM_FOREACH(d, k) {
+ KDBUS_PART_FOREACH(d, k, items) {
size_t l;
l = d->size - offsetof(struct kdbus_item, data);
- if (d->type == KDBUS_MSG_PAYLOAD_VEC) {
+ switch (d->type) {
+
+ case KDBUS_ITEM_PAYLOAD_OFF: {
size_t begin_body;
begin_body = BUS_MESSAGE_BODY_BEGIN(m);
goto fail;
}
+ /* A -1 offset is NUL padding. */
+ part->is_zero = d->vec.offset == ~0ULL;
+
if (idx >= begin_body) {
- part->data = UINT64_TO_PTR(d->vec.address);
+ if (!part->is_zero)
+ part->data = (uint8_t *)bus->kdbus_buffer + d->vec.offset;
part->size = d->vec.size;
} else {
- part->data = d->vec.address != 0 ? (uint8_t*) UINT64_TO_PTR(d->vec.address) + (begin_body - idx) : NULL;
+ if (!part->is_zero)
+ part->data = (uint8_t *)bus->kdbus_buffer + d->vec.offset + (begin_body - idx);
part->size = d->vec.size - (begin_body - idx);
}
- part->is_zero = d->vec.address == 0;
part->sealed = true;
}
idx += d->vec.size;
- } else if (d->type == KDBUS_MSG_PAYLOAD_MEMFD) {
+ break;
+ }
+
+ case KDBUS_ITEM_PAYLOAD_MEMFD: {
struct bus_body_part *part;
if (idx < BUS_MESSAGE_BODY_BEGIN(m)) {
part->sealed = true;
idx += d->memfd.size;
+ break;
+ }
- } else if (d->type == KDBUS_MSG_SRC_CREDS) {
- m->pid_starttime = d->creds.starttime / NSEC_PER_USEC;
- m->uid = d->creds.uid;
- m->gid = d->creds.gid;
- m->pid = d->creds.pid;
- m->tid = d->creds.tid;
- m->uid_valid = m->gid_valid = true;
- } else if (d->type == KDBUS_MSG_TIMESTAMP) {
+ case KDBUS_ITEM_CREDS:
+ m->creds.pid_starttime = d->creds.starttime / NSEC_PER_USEC;
+ m->creds.uid = d->creds.uid;
+ m->creds.gid = d->creds.gid;
+ m->creds.pid = d->creds.pid;
+ m->creds.tid = d->creds.tid;
+ m->creds.mask |= (SD_BUS_CREDS_UID|SD_BUS_CREDS_GID|SD_BUS_CREDS_PID|SD_BUS_CREDS_PID_STARTTIME|SD_BUS_CREDS_TID) & bus->creds_mask;
+ break;
+
+ case KDBUS_ITEM_TIMESTAMP:
m->realtime = d->timestamp.realtime_ns / NSEC_PER_USEC;
m->monotonic = d->timestamp.monotonic_ns / NSEC_PER_USEC;
- } else if (d->type == KDBUS_MSG_SRC_PID_COMM)
- m->comm = d->str;
- else if (d->type == KDBUS_MSG_SRC_TID_COMM)
- m->tid_comm = d->str;
- else if (d->type == KDBUS_MSG_SRC_EXE)
- m->exe = d->str;
- else if (d->type == KDBUS_MSG_SRC_CMDLINE) {
- m->cmdline = d->str;
- m->cmdline_length = l;
- } else if (d->type == KDBUS_MSG_SRC_CGROUP)
- m->cgroup = d->str;
- else if (d->type == KDBUS_MSG_SRC_AUDIT)
- m->audit = &d->audit;
- else if (d->type == KDBUS_MSG_SRC_CAPS) {
- m->capability = d->data;
- m->capability_size = l;
- } else if (d->type == KDBUS_MSG_DST_NAME)
+ 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_TID_COMM:
+ m->creds.tid_comm = d->str;
+ m->creds.mask |= SD_BUS_CREDS_TID_COMM & bus->creds_mask;
+ break;
+
+ case KDBUS_ITEM_EXE:
+ m->creds.exe = d->str;
+ m->creds.mask |= SD_BUS_CREDS_EXE & bus->creds_mask;
+ break;
+
+ case KDBUS_ITEM_CMDLINE:
+ m->creds.cmdline = d->str;
+ m->creds.cmdline_length = l;
+ m->creds.mask |= SD_BUS_CREDS_CMDLINE & bus->creds_mask;
+ break;
+
+ 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;
+ break;
+
+ case KDBUS_ITEM_AUDIT:
+ m->creds.audit_session_id = d->audit.sessionid;
+ m->creds.audit_login_uid = d->audit.loginuid;
+ m->creds.mask |= (SD_BUS_CREDS_AUDIT_SESSION_ID|SD_BUS_CREDS_AUDIT_LOGIN_UID) & bus->creds_mask;
+ break;
+
+ 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;
+
+ case KDBUS_ITEM_DST_NAME:
destination = d->str;
- else if (d->type != KDBUS_MSG_FDS &&
- d->type != KDBUS_MSG_SRC_SECLABEL)
+ break;
+
+ case KDBUS_ITEM_FDS:
+ case KDBUS_ITEM_SECLABEL:
+ case KDBUS_ITEM_NAMES:
+ break;
+
+ default:
log_debug("Got unknown field from kernel %llu", d->type);
+ }
}
r = bus_message_parse_fields(m);
/* We take possession of the kmsg struct now */
m->kdbus = k;
- m->bus = sd_bus_ref(bus);
m->release_kdbus = true;
m->free_fds = true;
-
fds = NULL;
- *ret = m;
+ bus->rqueue[bus->rqueue_size++] = m;
+
return 1;
fail:
return r;
}
-int bus_kernel_read_message(sd_bus *bus, sd_bus_message **m) {
+int bus_kernel_read_message(sd_bus *bus) {
struct kdbus_msg *k;
+ uint64_t off;
int r;
assert(bus);
- assert(m);
- r = ioctl(bus->input_fd, KDBUS_CMD_MSG_RECV, &k);
+ r = bus_rqueue_make_room(bus);
+ if (r < 0)
+ return r;
+
+ r = ioctl(bus->input_fd, KDBUS_CMD_MSG_RECV, &off);
if (r < 0) {
if (errno == EAGAIN)
return 0;
return -errno;
}
+ k = (struct kdbus_msg *)((uint8_t *)bus->kdbus_buffer + off);
+
+ if (k->payload_type == KDBUS_PAYLOAD_DBUS1)
+ r = bus_kernel_make_message(bus, k);
+ else if (k->payload_type == KDBUS_PAYLOAD_KERNEL)
+ r = bus_kernel_translate_message(bus, k);
+ else
+ r = 0;
- r = bus_kernel_make_message(bus, k, m);
if (r <= 0)
close_kdbus_msg(bus, k);
int bus_kernel_create(const char *name, char **s) {
struct kdbus_cmd_bus_make *make;
- struct kdbus_item *n, *cg;
+ struct kdbus_item *n;
size_t l;
int fd;
char *p;
l = strlen(name);
make = alloca0(offsetof(struct kdbus_cmd_bus_make, items) +
- KDBUS_ITEM_HEADER_SIZE + sizeof(uint64_t) +
- KDBUS_ITEM_HEADER_SIZE + DECIMAL_STR_MAX(uid_t) + 1 + l + 1);
-
- cg = make->items;
- cg->type = KDBUS_MAKE_CGROUP;
- cg->data64[0] = 1;
- cg->size = KDBUS_ITEM_HEADER_SIZE + sizeof(uint64_t);
+ KDBUS_PART_HEADER_SIZE + sizeof(uint64_t) +
+ KDBUS_PART_HEADER_SIZE + DECIMAL_STR_MAX(uid_t) + 1 + l + 1);
- n = KDBUS_ITEM_NEXT(cg);
+ n = make->items;
n->type = KDBUS_MAKE_NAME;
sprintf(n->str, "%lu-%s", (unsigned long) getuid(), name);
- n->size = KDBUS_ITEM_HEADER_SIZE + strlen(n->str) + 1;
+ n->size = KDBUS_PART_HEADER_SIZE + strlen(n->str) + 1;
- make->size = offsetof(struct kdbus_cmd_bus_make, items) + cg->size + n->size;
+ make->size = offsetof(struct kdbus_cmd_bus_make, items) + n->size;
make->flags = KDBUS_MAKE_POLICY_OPEN;
make->bus_flags = 0;
make->bloom_size = BLOOM_SIZE;
int bus_kernel_pop_memfd(sd_bus *bus, void **address, size_t *size) {
struct memfd_cache *c;
+ int fd;
assert(address);
assert(size);
if (!bus || !bus->is_kernel)
return -ENOTSUP;
+ assert_se(pthread_mutex_lock(&bus->memfd_cache_mutex) >= 0);
+
if (bus->n_memfd_cache <= 0) {
- int fd, r;
+ int r;
+
+ assert_se(pthread_mutex_unlock(&bus->memfd_cache_mutex) >= 0);
r = ioctl(bus->input_fd, KDBUS_CMD_MEMFD_NEW, &fd);
if (r < 0)
return fd;
}
- c = &bus->memfd_cache[-- bus->n_memfd_cache];
+ c = &bus->memfd_cache[--bus->n_memfd_cache];
assert(c->fd >= 0);
assert(c->size == 0 || c->address);
*address = c->address;
*size = c->size;
+ fd = c->fd;
+
+ assert_se(pthread_mutex_unlock(&bus->memfd_cache_mutex) >= 0);
+
+ return fd;
+}
+
+static void close_and_munmap(int fd, void *address, size_t size) {
+ if (size > 0)
+ assert_se(munmap(address, PAGE_ALIGN(size)) >= 0);
- return c->fd;
+ close_nointr_nofail(fd);
}
void bus_kernel_push_memfd(sd_bus *bus, int fd, void *address, size_t size) {
struct memfd_cache *c;
+ uint64_t max_sz = PAGE_ALIGN(MEMFD_CACHE_ITEM_SIZE_MAX);
assert(fd >= 0);
assert(size == 0 || address);
- if (!bus || !bus->is_kernel ||
- bus->n_memfd_cache >= ELEMENTSOF(bus->memfd_cache)) {
+ if (!bus || !bus->is_kernel) {
+ close_and_munmap(fd, address, size);
+ return;
+ }
+
+ assert_se(pthread_mutex_lock(&bus->memfd_cache_mutex) >= 0);
- if (size > 0)
- assert_se(munmap(address, PAGE_ALIGN(size)) == 0);
+ if (bus->n_memfd_cache >= ELEMENTSOF(bus->memfd_cache)) {
+ assert_se(pthread_mutex_unlock(&bus->memfd_cache_mutex) >= 0);
- close_nointr_nofail(fd);
+ close_and_munmap(fd, address, size);
return;
}
c->address = address;
/* If overly long, let's return a bit to the OS */
- if (size > MEMFD_CACHE_ITEM_SIZE_MAX) {
- uint64_t sz = MEMFD_CACHE_ITEM_SIZE_MAX;
-
- ioctl(bus->input_fd, KDBUS_CMD_MEMFD_SIZE_SET, &sz);
-
- c->size = MEMFD_CACHE_ITEM_SIZE_MAX;
+ if (size > max_sz) {
+ assert_se(ioctl(fd, KDBUS_CMD_MEMFD_SIZE_SET, &max_sz) >= 0);
+ assert_se(munmap((uint8_t*) address + max_sz, PAGE_ALIGN(size - max_sz)) >= 0);
+ c->size = max_sz;
} else
c->size = size;
+
+ assert_se(pthread_mutex_unlock(&bus->memfd_cache_mutex) >= 0);
}
void bus_kernel_flush_memfd(sd_bus *b) {
assert(b);
- for (i = 0; i < b->n_memfd_cache; i++) {
- if (b->memfd_cache[i].size > 0)
- assert_se(munmap(b->memfd_cache[i].address, PAGE_ALIGN(b->memfd_cache[i].size)) == 0);
+ for (i = 0; i < b->n_memfd_cache; i++)
+ close_and_munmap(b->memfd_cache[i].fd, b->memfd_cache[i].address, b->memfd_cache[i].size);
+}
- close_nointr_nofail(b->memfd_cache[i].fd);
- }
+int kdbus_translate_request_name_flags(uint64_t sd_bus_flags, uint64_t *kdbus_flags) {
+
+ assert_return(kdbus_flags != NULL, -EINVAL);
+
+ *kdbus_flags = 0;
+
+ if (sd_bus_flags & SD_BUS_NAME_ALLOW_REPLACEMENT)
+ *kdbus_flags |= KDBUS_NAME_ALLOW_REPLACEMENT;
+
+ if (sd_bus_flags & SD_BUS_NAME_REPLACE_EXISTING)
+ *kdbus_flags |= KDBUS_NAME_REPLACE_EXISTING;
+
+ if (!(sd_bus_flags & SD_BUS_NAME_DO_NOT_QUEUE))
+ *kdbus_flags |= KDBUS_NAME_QUEUE;
+
+ return 0;
}
~ianmdlvl / elogind.git / blobdiff