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->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);
if (well_known)
/* verify_destination_id will usually be 0, which makes the kernel driver only look
}
/* Refuse messages where the reply flag doesn't match up */
- if (!(m->header->flags & BUS_MESSAGE_NO_REPLY_EXPECTED) != !!(k->flags & KDBUS_MSG_FLAGS_EXPECT_REPLY)) {
+ if (!(m->header->flags & BUS_MESSAGE_NO_REPLY_EXPECTED) != !!(k->flags & KDBUS_MSG_EXPECT_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_FLAGS_NO_AUTO_START)) {
+ if (!(m->header->flags & BUS_MESSAGE_NO_AUTO_START) != !(k->flags & KDBUS_MSG_NO_AUTO_START)) {
r = -EBADMSG;
goto fail;
}
}
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) {
}
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;
return -errno;
}
- k = (struct kdbus_msg *)((uint8_t *)bus->kdbus_buffer + recv.offset);
+ k = (struct kdbus_msg *)((uint8_t *)bus->kdbus_buffer + recv.reply.offset);
if (k->payload_type == KDBUS_PAYLOAD_DBUS) {
r = bus_kernel_make_message(bus, k);
int bus_kernel_drop_one(int fd) {
struct kdbus_cmd_recv recv = {
- .flags = KDBUS_RECV_DROP
+ .size = sizeof(recv),
+ .flags = KDBUS_RECV_DROP,
};
assert(fd >= 0);
- if (ioctl(fd, KDBUS_CMD_MSG_RECV, &recv) < 0)
+ if (ioctl(fd, KDBUS_CMD_RECV, &recv) < 0)
return -errno;
return 0;
* struct kdbus_pids - process identifiers
* @pid: Process ID
* @tid: Thread ID
+ * @ppid: Parent process ID
*
* The PID and TID of a process.
*
struct kdbus_pids {
__u64 pid;
__u64 tid;
+ __u64 ppid;
};
/**
/**
* enum kdbus_msg_flags - type of message
- * @KDBUS_MSG_FLAGS_EXPECT_REPLY: Expect a reply message, used for
- * method calls. The userspace-supplied
- * cookie identifies the message and the
- * respective reply carries the cookie
- * in cookie_reply
- * @KDBUS_MSG_FLAGS_SYNC_REPLY: Wait for destination connection to
- * reply to this message. The
- * KDBUS_CMD_MSG_SEND ioctl() will block
- * until the reply is received, and
- * offset_reply in struct kdbus_msg will
- * yield the offset in the sender's pool
- * where the reply can be found.
- * This flag is only valid if
- * @KDBUS_MSG_FLAGS_EXPECT_REPLY is set as
- * well.
- * @KDBUS_MSG_FLAGS_NO_AUTO_START: Do not start a service, if the addressed
- * name is not currently active
+ * @KDBUS_MSG_EXPECT_REPLY: Expect a reply message, used for
+ * method calls. The userspace-supplied
+ * cookie identifies the message and the
+ * respective reply carries the cookie
+ * in cookie_reply
+ * @KDBUS_MSG_NO_AUTO_START: Do not start a service, if the addressed
+ * name is not currently active
*/
enum kdbus_msg_flags {
- KDBUS_MSG_FLAGS_EXPECT_REPLY = 1ULL << 0,
- KDBUS_MSG_FLAGS_SYNC_REPLY = 1ULL << 1,
- KDBUS_MSG_FLAGS_NO_AUTO_START = 1ULL << 2,
+ KDBUS_MSG_EXPECT_REPLY = 1ULL << 0,
+ KDBUS_MSG_NO_AUTO_START = 1ULL << 1,
};
/**
* enum kdbus_payload_type - type of payload carried by message
* @KDBUS_PAYLOAD_KERNEL: Kernel-generated simple message
* @KDBUS_PAYLOAD_DBUS: D-Bus marshalling "DBusDBus"
+ *
+ * Any payload-type is accepted. Common types will get added here once
+ * established.
*/
enum kdbus_payload_type {
KDBUS_PAYLOAD_KERNEL,
/**
* struct kdbus_msg - the representation of a kdbus message
* @size: Total size of the message
- * @flags: Message flags (KDBUS_MSG_FLAGS_*), userspace → kernel
- * @kernel_flags: Supported message flags, kernel → userspace
+ * @flags: Message flags (KDBUS_MSG_*), userspace → kernel
* @priority: Message queue priority value
* @dst_id: 64-bit ID of the destination connection
* @src_id: 64-bit ID of the source connection
* @cookie_reply: A reply to the requesting message with the same
* cookie. The requesting connection can match its
* request and the reply with this value
- * @offset_reply: If KDBUS_MSG_FLAGS_EXPECT_REPLY, this field will
- * contain the offset in the sender's pool where the
- * reply is stored.
* @items: A list of kdbus_items containing the message payload
*/
struct kdbus_msg {
__u64 size;
__u64 flags;
- __u64 kernel_flags;
__s64 priority;
__u64 dst_id;
__u64 src_id;
union {
__u64 timeout_ns;
__u64 cookie_reply;
- __u64 offset_reply;
};
struct kdbus_item items[0];
} __attribute__((aligned(8)));
+/**
+ * struct kdbus_reply - reply container
+ * @offset: Offset of kdbus_msg slice in pool
+ * @msg_size: Copy of the kdbus_msg.size field
+ * @return_flags: Command return flags, kernel → userspace
+ */
+struct kdbus_reply {
+ __u64 offset;
+ __u64 msg_size;
+ __u64 return_flags;
+};
+
+/**
+ * enum kdbus_send_flags - flags for sending messages
+ * @KDBUS_SEND_SYNC_REPLY: Wait for destination connection to
+ * reply to this message. The
+ * KDBUS_CMD_SEND ioctl() will block
+ * until the reply is received, and
+ * offset_reply in struct kdbus_msg will
+ * yield the offset in the sender's pool
+ * where the reply can be found.
+ * This flag is only valid if
+ * @KDBUS_MSG_EXPECT_REPLY is set as well.
+ */
+enum kdbus_send_flags {
+ KDBUS_SEND_SYNC_REPLY = 1ULL << 0,
+};
+
+/**
+ * struct kdbus_cmd_send - send message
+ * @size: Overall size of this structure
+ * @flags: Flags to change send behavior (KDBUS_SEND_*)
+ * @kernel_flags: Supported send flags, kernel → userspace
+ * @kernel_msg_flags: Supported message flags, kernel → userspace
+ * @return_flags: Command return flags, kernel → userspace
+ * @msg_address: Storage address of the kdbus_msg to send
+ * @reply: Storage for message reply if KDBUS_SEND_SYNC_REPLY
+ * was given
+ * @items: Additional items for this command
+ */
+struct kdbus_cmd_send {
+ __u64 size;
+ __u64 flags;
+ __u64 kernel_flags;
+ __u64 kernel_msg_flags;
+ __u64 return_flags;
+ __u64 msg_address;
+ struct kdbus_reply reply;
+ struct kdbus_item items[0];
+} __attribute__((aligned(8)));
+
/**
* enum kdbus_recv_flags - flags for de-queuing messages
* @KDBUS_RECV_PEEK: Return the next queued message without
KDBUS_RECV_USE_PRIORITY = 1ULL << 2,
};
+/**
+ * enum kdbus_recv_return_flags - return flags for message receive commands
+ * @KDBUS_RECV_RETURN_INCOMPLETE_FDS: One or more file descriptors could not
+ * be installed. These descriptors in
+ * KDBUS_ITEM_FDS will carry the value -1.
+ */
+enum kdbus_recv_return_flags {
+ KDBUS_RECV_RETURN_INCOMPLETE_FDS = 1ULL << 0,
+};
+
/**
* struct kdbus_cmd_recv - struct to de-queue a buffered message
+ * @size: Overall size of this object
* @flags: KDBUS_RECV_* flags, userspace → kernel
* @kernel_flags: Supported KDBUS_RECV_* flags, kernel → userspace
+ * @return_flags: Command return flags, kernel → userspace
* @priority: Minimum priority of the messages to de-queue. Lowest
* values have the highest priority.
- * @offset: Returned offset in the pool where the message is
- * stored. The user must use KDBUS_CMD_FREE to free
- * the allocated memory.
- * @dropped_msgs: In case the KDBUS_CMD_MSG_RECV ioctl returns
+ * @dropped_msgs: In case the KDBUS_CMD_RECV ioctl returns
* -EOVERFLOW, this field will contain the number of
* broadcast messages that have been lost since the
* last call.
- * @msg_size: Filled by the kernel with the actual message size. This
- * is the full size of the slice placed at @offset. It
- * includes the memory used for the kdbus_msg object, but
- * also for all appended VECs. By using @msg_size and
- * @offset, you can map a single message, instead of
- * mapping the whole pool.
+ * @reply: Return storage for received message.
+ * @items: Additional items for this command.
*
- * This struct is used with the KDBUS_CMD_MSG_RECV ioctl.
+ * This struct is used with the KDBUS_CMD_RECV ioctl.
*/
struct kdbus_cmd_recv {
+ __u64 size;
__u64 flags;
__u64 kernel_flags;
+ __u64 return_flags;
__s64 priority;
- union {
- __u64 offset;
- __u64 dropped_msgs;
- };
- __u64 msg_size;
+ __u64 dropped_msgs;
+ struct kdbus_reply reply;
+ struct kdbus_item items[0];
} __attribute__((aligned(8)));
/**
* struct kdbus_cmd_cancel - struct to cancel a synchronously pending message
- * @cookie: The cookie of the pending message
+ * @size: Overall size of this object
* @flags: Flags for the free command. Currently unused.
+ * @kernel_flags: Supported flags of CANCEL, kernel → userspace
+ * @return_flags: Command return flags, kernel → userspace
+ * @cookie: The cookie of the pending message
+ * @items: Items to modify the command behavior
*
* This struct is used with the KDBUS_CMD_CANCEL ioctl.
*/
struct kdbus_cmd_cancel {
- __u64 cookie;
+ __u64 size;
__u64 flags;
+ __u64 kernel_flags;
+ __u64 return_flags;
+ __u64 cookie;
+ struct kdbus_item items[0];
} __attribute__((aligned(8)));
/**
* @offset: The offset of the memory slice, as returned by other
* ioctls
* @flags: Flags for the free command, userspace → kernel
+ * @return_flags: Command return flags, kernel → userspace
* @kernel_flags: Supported flags of the free command, userspace → kernel
*
* This struct is used with the KDBUS_CMD_FREE ioctl.
__u64 offset;
__u64 flags;
__u64 kernel_flags;
+ __u64 return_flags;
} __attribute__((aligned(8)));
/**
* policy entries for a name. The provided name
* is not activated and not registered with the
* name database, it only allows unprivileged
- * connections to aquire a name, talk or discover
+ * connections to acquire a name, talk or discover
* a service
* @KDBUS_HELLO_MONITOR: Special-purpose connection to monitor
* bus traffic
* @size: The total size of the structure
* @flags: Connection flags (KDBUS_HELLO_*), userspace → kernel
* @kernel_flags: Supported connection flags, kernel → userspace
+ * @return_flags: Command return flags, kernel → userspace
* @attach_flags_send: Mask of metadata to attach to each message sent
* off by this connection (KDBUS_ATTACH_*)
* @attach_flags_recv: Mask of metadata to attach to each message receieved
__u64 size;
__u64 flags;
__u64 kernel_flags;
+ __u64 return_flags;
__u64 attach_flags_send;
__u64 attach_flags_recv;
__u64 bus_flags;
* @flags: Properties for the bus/ep/domain to create,
* userspace → kernel
* @kernel_flags: Supported flags for the used command, kernel → userspace
+ * @return_flags: Command return flags, kernel → userspace
* @items: Items describing details
*
* This structure is used with the KDBUS_CMD_BUS_MAKE and
__u64 size;
__u64 flags;
__u64 kernel_flags;
+ __u64 return_flags;
struct kdbus_item items[0];
} __attribute__((aligned(8)));
* @flags: Flags for a name entry (KDBUS_NAME_*),
* userspace → kernel, kernel → userspace
* @kernel_flags: Supported flags for a name entry, kernel → userspace
+ * @return_flags: Command return flags, kernel → userspace
* @items: Item list, containing the well-known name as
* KDBUS_ITEM_NAME
*
__u64 size;
__u64 flags;
__u64 kernel_flags;
+ __u64 return_flags;
struct kdbus_item items[0];
} __attribute__((aligned(8)));
struct kdbus_item items[0];
} __attribute__((aligned(8)));
+/**
+ * struct kdbus_name_list - information returned by KDBUS_CMD_NAME_LIST
+ * @size: The total size of the structure
+ * @names: A list of names
+ *
+ * Note that the user is responsible for freeing the allocated memory with
+ * the KDBUS_CMD_FREE ioctl.
+ */
+struct kdbus_name_list {
+ __u64 size;
+ struct kdbus_name_info names[0];
+};
+
/**
* enum kdbus_name_list_flags - what to include into the returned list
* @KDBUS_NAME_LIST_UNIQUE: All active connections
* @flags: Flags for the query (KDBUS_NAME_LIST_*),
* userspace → kernel
* @kernel_flags: Supported flags for queries, kernel → userspace
+ * @return_flags: Command return flags, kernel → userspace
* @offset: The returned offset in the caller's pool buffer.
* The user must use KDBUS_CMD_FREE to free the
* allocated memory.
* This structure is used with the KDBUS_CMD_NAME_LIST ioctl.
*/
struct kdbus_cmd_name_list {
+ __u64 size;
__u64 flags;
__u64 kernel_flags;
+ __u64 return_flags;
__u64 offset;
- __u64 size;
+ __u64 list_size;
+ struct kdbus_item items[0];
} __attribute__((aligned(8)));
/**
- * struct kdbus_name_list - information returned by KDBUS_CMD_NAME_LIST
- * @size: The total size of the structure
- * @names: A list of names
+ * struct kdbus_info - information returned by KDBUS_CMD_*_INFO
+ * @size: The total size of the struct
+ * @id: The connection's or bus' 64-bit ID
+ * @flags: The connection's or bus' flags
+ * @items: A list of struct kdbus_item
*
* Note that the user is responsible for freeing the allocated memory with
* the KDBUS_CMD_FREE ioctl.
*/
-struct kdbus_name_list {
+struct kdbus_info {
__u64 size;
- struct kdbus_name_info names[0];
+ __u64 id;
+ __u64 flags;
+ struct kdbus_item items[0];
};
/**
* @size: The total size of the struct
* @flags: KDBUS_ATTACH_* flags, userspace → kernel
* @kernel_flags: Supported KDBUS_ATTACH_* flags, kernel → userspace
+ * @return_flags: Command return flags, kernel → userspace
* @id: The 64-bit ID of the connection. If set to zero, passing
* @name is required. kdbus will look up the name to
* determine the ID in this case.
__u64 size;
__u64 flags;
__u64 kernel_flags;
+ __u64 return_flags;
__u64 id;
__u64 offset;
__u64 info_size;
struct kdbus_item items[0];
} __attribute__((aligned(8)));
-/**
- * struct kdbus_info - information returned by KDBUS_CMD_*_INFO
- * @size: The total size of the struct
- * @id: The connection's or bus' 64-bit ID
- * @flags: The connection's or bus' flags
- * @items: A list of struct kdbus_item
- *
- * Note that the user is responsible for freeing the allocated memory with
- * the KDBUS_CMD_FREE ioctl.
- */
-struct kdbus_info {
- __u64 size;
- __u64 id;
- __u64 flags;
- struct kdbus_item items[0];
-};
-
/**
* struct kdbus_cmd_update - update flags of a connection
* @size: The total size of the struct
* @flags: Flags for the update command, userspace → kernel
* @kernel_flags: Supported flags for this command, kernel → userspace
+ * @return_flags: Command return flags, kernel → userspace
* @items: A list of struct kdbus_item
*
* This struct is used with the KDBUS_CMD_CONN_UPDATE ioctl.
__u64 size;
__u64 flags;
__u64 kernel_flags;
+ __u64 return_flags;
struct kdbus_item items[0];
} __attribute__((aligned(8)));
* @flags: Flags for match command (KDBUS_MATCH_*),
* userspace → kernel
* @kernel_flags: Supported flags of the used command, kernel → userspace
+ * @return_flags: Command return flags, kernel → userspace
* @items: A list of items for additional information
*
* This structure is used with the KDBUS_CMD_MATCH_ADD and
__u64 cookie;
__u64 flags;
__u64 kernel_flags;
+ __u64 return_flags;
struct kdbus_item items[0];
} __attribute__((aligned(8)));
* the call succeeds, and the handle is rendered
* unusable. Otherwise, -EBUSY is returned without
* any further side-effects.
- * KDBUS_CMD_MSG_SEND: Send a message and pass data from userspace to
+ * KDBUS_CMD_SEND: Send a message and pass data from userspace to
* the kernel.
- * KDBUS_CMD_MSG_RECV: Receive a message from the kernel which is
+ * KDBUS_CMD_RECV: Receive a message from the kernel which is
* placed in the receiver's pool.
- * KDBUS_CMD_MSG_CANCEL: Cancel a pending request of a message that
+ * KDBUS_CMD_CANCEL: Cancel a pending request of a message that
* blocks while waiting for a reply. The parameter
* denotes the cookie of the message in flight.
* KDBUS_CMD_FREE: Release the allocated memory in the receiver's
struct kdbus_cmd_hello)
#define KDBUS_CMD_BYEBYE _IO(KDBUS_IOCTL_MAGIC, 0x21) \
-#define KDBUS_CMD_MSG_SEND _IOWR(KDBUS_IOCTL_MAGIC, 0x30, \
+#define KDBUS_CMD_SEND _IOWR(KDBUS_IOCTL_MAGIC, 0x30, \
struct kdbus_msg)
-#define KDBUS_CMD_MSG_RECV _IOWR(KDBUS_IOCTL_MAGIC, 0x31, \
+#define KDBUS_CMD_RECV _IOWR(KDBUS_IOCTL_MAGIC, 0x31, \
struct kdbus_cmd_recv)
-#define KDBUS_CMD_MSG_CANCEL _IOW(KDBUS_IOCTL_MAGIC, 0x32, \
+#define KDBUS_CMD_CANCEL _IOW(KDBUS_IOCTL_MAGIC, 0x32, \
struct kdbus_cmd_cancel)
#define KDBUS_CMD_FREE _IOW(KDBUS_IOCTL_MAGIC, 0x33, \
struct kdbus_cmd_free)
~ianmdlvl / elogind.git / commitdiff