#define KDBUS_DST_ID_NAME (0)
#define KDBUS_MATCH_ID_ANY (~0ULL)
#define KDBUS_DST_ID_BROADCAST (~0ULL)
-#define KDBUS_FLAG_KERNEL (1ULL << 63)
+#define KDBUS_FLAG_NEGOTIATE (1ULL << 63)
/**
* struct kdbus_notify_id_change - name registry change message
struct kdbus_notify_id_change {
__u64 id;
__u64 flags;
-};
+} __attribute__((__aligned__(8)));
/**
* struct kdbus_notify_name_change - name registry change message
struct kdbus_notify_id_change old_id;
struct kdbus_notify_id_change new_id;
char name[0];
-};
+} __attribute__((__aligned__(8)));
/**
* struct kdbus_creds - process credentials
* @uid: User ID
+ * @euid: Effective UID
+ * @suid: Saved UID
+ * @fsuid: Filesystem UID
* @gid: Group ID
+ * @egid: Effective GID
+ * @sgid: Saved GID
+ * @fsgid: Filesystem GID
+ *
+ * Attached to:
+ * KDBUS_ITEM_CREDS
+ */
+struct kdbus_creds {
+ __u32 uid;
+ __u32 euid;
+ __u32 suid;
+ __u32 fsuid;
+ __u32 gid;
+ __u32 egid;
+ __u32 sgid;
+ __u32 fsgid;
+} __attribute__((__aligned__(8)));
+
+/**
+ * struct kdbus_pids - process identifiers
* @pid: Process ID
* @tid: Thread ID
- * @starttime: Starttime of the process
+ * @ppid: Parent process ID
*
- * The starttime of the process PID. This is useful to detect PID overruns
- * from the client side. i.e. if you use the PID to look something up in
- * /proc/$PID/ you can afterwards check the starttime field of it, to ensure
- * you didn't run into a PID overrun.
+ * The PID and TID of a process.
*
* Attached to:
- * KDBUS_ITEM_CREDS
+ * KDBUS_ITEM_PIDS
*/
-struct kdbus_creds {
- __u64 uid;
- __u64 gid;
+struct kdbus_pids {
__u64 pid;
__u64 tid;
- __u64 starttime;
-};
+ __u64 ppid;
+} __attribute__((__aligned__(8)));
/**
* struct kdbus_caps - process capabilities
struct kdbus_caps {
__u32 last_cap;
__u32 caps[0];
-};
+} __attribute__((__aligned__(8)));
/**
* struct kdbus_audit - audit information
* KDBUS_ITEM_AUDIT
*/
struct kdbus_audit {
- __u64 sessionid;
- __u64 loginuid;
-};
+ __u32 sessionid;
+ __u32 loginuid;
+} __attribute__((__aligned__(8)));
/**
* struct kdbus_timestamp
__u64 seqnum;
__u64 monotonic_ns;
__u64 realtime_ns;
-};
+} __attribute__((__aligned__(8)));
/**
* struct kdbus_vec - I/O vector for kdbus payload items
__u64 address;
__u64 offset;
};
-};
+} __attribute__((__aligned__(8)));
/**
* struct kdbus_bloom_parameter - bus-wide bloom parameters
struct kdbus_bloom_parameter {
__u64 size;
__u64 n_hash;
-};
+} __attribute__((__aligned__(8)));
/**
* struct kdbus_bloom_filter - bloom filter containing n elements
struct kdbus_bloom_filter {
__u64 generation;
__u64 data[0];
-};
+} __attribute__((__aligned__(8)));
/**
* struct kdbus_memfd - a kdbus memfd
- * @size: The memfd's size
+ * @start: The offset into the memfd where the segment starts
+ * @size: The size of the memfd segment
* @fd: The file descriptor number
* @__pad: Padding to ensure proper alignment and size
*
* KDBUS_ITEM_PAYLOAD_MEMFD
*/
struct kdbus_memfd {
+ __u64 start;
__u64 size;
int fd;
__u32 __pad;
-};
+} __attribute__((__aligned__(8)));
/**
* struct kdbus_name - a registered well-known name with its flags
struct kdbus_name {
__u64 flags;
char name[0];
+} __attribute__((__aligned__(8)));
+
+/**
+ * enum kdbus_policy_access_type - permissions of a policy record
+ * @_KDBUS_POLICY_ACCESS_NULL: Uninitialized/invalid
+ * @KDBUS_POLICY_ACCESS_USER: Grant access to a uid
+ * @KDBUS_POLICY_ACCESS_GROUP: Grant access to gid
+ * @KDBUS_POLICY_ACCESS_WORLD: World-accessible
+ */
+enum kdbus_policy_access_type {
+ _KDBUS_POLICY_ACCESS_NULL,
+ KDBUS_POLICY_ACCESS_USER,
+ KDBUS_POLICY_ACCESS_GROUP,
+ KDBUS_POLICY_ACCESS_WORLD,
+};
+
+/**
+ * enum kdbus_policy_access_flags - mode flags
+ * @KDBUS_POLICY_OWN: Allow to own a well-known name
+ * Implies KDBUS_POLICY_TALK and KDBUS_POLICY_SEE
+ * @KDBUS_POLICY_TALK: Allow communication to a well-known name
+ * Implies KDBUS_POLICY_SEE
+ * @KDBUS_POLICY_SEE: Allow to see a well-known name
+ */
+enum kdbus_policy_type {
+ KDBUS_POLICY_SEE = 0,
+ KDBUS_POLICY_TALK,
+ KDBUS_POLICY_OWN,
};
/**
__u64 type; /* USER, GROUP, WORLD */
__u64 access; /* OWN, TALK, SEE */
__u64 id; /* uid, gid, 0 */
+} __attribute__((__aligned__(8)));
+
+/**
+ * enum kdbus_attach_flags - flags for metadata attachments
+ * @KDBUS_ATTACH_TIMESTAMP: Timestamp
+ * @KDBUS_ATTACH_CREDS: Credentials
+ * @KDBUS_ATTACH_PIDS: PIDs
+ * @KDBUS_ATTACH_AUXGROUPS: Auxiliary groups
+ * @KDBUS_ATTACH_NAMES: Well-known names
+ * @KDBUS_ATTACH_TID_COMM: The "comm" process identifier of the TID
+ * @KDBUS_ATTACH_PID_COMM: The "comm" process identifier of the PID
+ * @KDBUS_ATTACH_EXE: The path of the executable
+ * @KDBUS_ATTACH_CMDLINE: The process command line
+ * @KDBUS_ATTACH_CGROUP: The croup membership
+ * @KDBUS_ATTACH_CAPS: The process capabilities
+ * @KDBUS_ATTACH_SECLABEL: The security label
+ * @KDBUS_ATTACH_AUDIT: The audit IDs
+ * @KDBUS_ATTACH_CONN_DESCRIPTION: The human-readable connection name
+ * @_KDBUS_ATTACH_ALL: All of the above
+ * @_KDBUS_ATTACH_ANY: Wildcard match to enable any kind of
+ * metatdata.
+ */
+enum kdbus_attach_flags {
+ KDBUS_ATTACH_TIMESTAMP = 1ULL << 0,
+ KDBUS_ATTACH_CREDS = 1ULL << 1,
+ KDBUS_ATTACH_PIDS = 1ULL << 2,
+ KDBUS_ATTACH_AUXGROUPS = 1ULL << 3,
+ KDBUS_ATTACH_NAMES = 1ULL << 4,
+ KDBUS_ATTACH_TID_COMM = 1ULL << 5,
+ KDBUS_ATTACH_PID_COMM = 1ULL << 6,
+ KDBUS_ATTACH_EXE = 1ULL << 7,
+ KDBUS_ATTACH_CMDLINE = 1ULL << 8,
+ KDBUS_ATTACH_CGROUP = 1ULL << 9,
+ KDBUS_ATTACH_CAPS = 1ULL << 10,
+ KDBUS_ATTACH_SECLABEL = 1ULL << 11,
+ KDBUS_ATTACH_AUDIT = 1ULL << 12,
+ KDBUS_ATTACH_CONN_DESCRIPTION = 1ULL << 13,
+ _KDBUS_ATTACH_ALL = (1ULL << 14) - 1,
+ _KDBUS_ATTACH_ANY = ~0ULL
};
/**
* enum kdbus_item_type - item types to chain data in a list
* @_KDBUS_ITEM_NULL: Uninitialized/invalid
* @_KDBUS_ITEM_USER_BASE: Start of user items
+ * @KDBUS_ITEM_NEGOTIATE: Negotiate supported items
* @KDBUS_ITEM_PAYLOAD_VEC: Vector to data
* @KDBUS_ITEM_PAYLOAD_OFF: Data at returned offset to message head
* @KDBUS_ITEM_PAYLOAD_MEMFD: Data as sealed memfd
* @KDBUS_ITEM_FDS: Attached file descriptors
+ * @KDBUS_ITEM_CANCEL_FD: FD used to cancel a synchronous
+ * operation by writing to it from
+ * userspace
* @KDBUS_ITEM_BLOOM_PARAMETER: Bus-wide bloom parameters, used with
* KDBUS_CMD_BUS_MAKE, carries a
* struct kdbus_bloom_parameter
* @KDBUS_ITEM_NAME: Well-know name with flags
* @_KDBUS_ITEM_ATTACH_BASE: Start of metadata attach items
* @KDBUS_ITEM_TIMESTAMP: Timestamp
- * @KDBUS_ITEM_CREDS: Process credential
+ * @KDBUS_ITEM_CREDS: Process credentials
+ * @KDBUS_ITEM_PIDS: Process identifiers
* @KDBUS_ITEM_AUXGROUPS: Auxiliary process groups
* @KDBUS_ITEM_OWNED_NAME: A name owned by the associated
* connection
* @KDBUS_ITEM_TID_COMM: Thread ID "comm" identifier
+ * (Don't trust this, see below.)
* @KDBUS_ITEM_PID_COMM: Process ID "comm" identifier
+ * (Don't trust this, see below.)
* @KDBUS_ITEM_EXE: The path of the executable
+ * (Don't trust this, see below.)
* @KDBUS_ITEM_CMDLINE: The process command line
+ * (Don't trust this, see below.)
* @KDBUS_ITEM_CGROUP: The croup membership
* @KDBUS_ITEM_CAPS: The process capabilities
* @KDBUS_ITEM_SECLABEL: The security label
* @KDBUS_ITEM_ID_REMOVE: Notification in kdbus_notify_id_change
* @KDBUS_ITEM_REPLY_TIMEOUT: Timeout has been reached
* @KDBUS_ITEM_REPLY_DEAD: Destination died
+ *
+ * N.B: The process and thread COMM fields, as well as the CMDLINE and
+ * EXE fields may be altered by unprivileged processes und should
+ * hence *not* used for security decisions. Peers should make use of
+ * these items only for informational purposes, such as generating log
+ * records.
*/
enum kdbus_item_type {
_KDBUS_ITEM_NULL,
_KDBUS_ITEM_USER_BASE,
- KDBUS_ITEM_PAYLOAD_VEC = _KDBUS_ITEM_USER_BASE,
+ KDBUS_ITEM_NEGOTIATE = _KDBUS_ITEM_USER_BASE,
+ KDBUS_ITEM_PAYLOAD_VEC,
KDBUS_ITEM_PAYLOAD_OFF,
KDBUS_ITEM_PAYLOAD_MEMFD,
KDBUS_ITEM_FDS,
+ KDBUS_ITEM_CANCEL_FD,
KDBUS_ITEM_BLOOM_PARAMETER,
KDBUS_ITEM_BLOOM_FILTER,
KDBUS_ITEM_BLOOM_MASK,
_KDBUS_ITEM_ATTACH_BASE = 0x1000,
KDBUS_ITEM_TIMESTAMP = _KDBUS_ITEM_ATTACH_BASE,
KDBUS_ITEM_CREDS,
+ KDBUS_ITEM_PIDS,
KDBUS_ITEM_AUXGROUPS,
KDBUS_ITEM_OWNED_NAME,
KDBUS_ITEM_TID_COMM,
__u64 id;
struct kdbus_vec vec;
struct kdbus_creds creds;
+ struct kdbus_pids pids;
struct kdbus_audit audit;
struct kdbus_caps caps;
struct kdbus_timestamp timestamp;
struct kdbus_notify_id_change id_change;
struct kdbus_policy_access policy_access;
};
-};
+} __attribute__((__aligned__(8)));
+
+/**
+ * struct kdbus_item_list - A list of items
+ * @size: The total size of the structure
+ * @items: Array of items
+ */
+struct kdbus_item_list {
+ __u64 size;
+ struct kdbus_item items[0];
+} __attribute__((__aligned__(8)));
/**
* 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
+ * @KDBUS_MSG_SIGNAL: Treat this message as signal
*/
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,
+ KDBUS_MSG_SIGNAL = 1ULL << 2,
};
/**
* 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)));
+} __attribute__((__aligned__(8)));
+
+/**
+ * struct kdbus_msg_info - returned message 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_msg_info {
+ __u64 offset;
+ __u64 msg_size;
+ __u64 return_flags;
+} __attribute__((__aligned__(8)));
+
+/**
+ * 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_*)
+ * @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 return_flags;
+ __u64 msg_address;
+ struct kdbus_msg_info reply;
+ struct kdbus_item items[0];
+} __attribute__((__aligned__(8)));
/**
* enum kdbus_recv_flags - flags for de-queuing messages
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.
+ * @KDBUS_RECV_RETURN_DROPPED_MSGS: There have been dropped messages since
+ * the last time a message was received.
+ * The 'dropped_msgs' counter contains the
+ * number of messages dropped pool
+ * overflows or other missed broadcasts.
+ */
+enum kdbus_recv_return_flags {
+ KDBUS_RECV_RETURN_INCOMPLETE_FDS = 1ULL << 0,
+ KDBUS_RECV_RETURN_DROPPED_MSGS = 1ULL << 1,
+};
+
/**
* 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 there were any dropped messages since the last
+ * time a message was received, this will be set to the
+ * number of lost messages and
+ * KDBUS_RECV_RETURN_DROPPED_MSGS will be set in
+ * 'return_flags'. This can only happen if the ioctl
+ * returns 0 or EAGAIN.
+ * @msg: 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;
- __u64 offset;
-} __attribute__((aligned(8)));
-
-/**
- * struct kdbus_cmd_cancel - struct to cancel a synchronously pending message
- * @cookie: The cookie of the pending message
- * @flags: Flags for the free command. Currently unused.
- *
- * This struct is used with the KDBUS_CMD_CANCEL ioctl.
- */
-struct kdbus_cmd_cancel {
- __u64 cookie;
- __u64 flags;
-} __attribute__((aligned(8)));
+ __u64 dropped_msgs;
+ struct kdbus_msg_info msg;
+ struct kdbus_item items[0];
+} __attribute__((__aligned__(8)));
/**
* struct kdbus_cmd_free - struct to free a slice of memory in the pool
+ * @size: Overall size of this structure
+ * @flags: Flags for the free command, userspace → kernel
+ * @return_flags: Command return flags, kernel → userspace
* @offset: The offset of the memory slice, as returned by other
* ioctls
- * @flags: Flags for the free command, userspace → kernel
- * @kernel_flags: Supported flags of the free command, userspace → kernel
+ * @items: Additional items to modify the behavior
*
* This struct is used with the KDBUS_CMD_FREE ioctl.
*/
struct kdbus_cmd_free {
- __u64 offset;
+ __u64 size;
__u64 flags;
- __u64 kernel_flags;
-} __attribute__((aligned(8)));
-
-/**
- * enum kdbus_policy_access_type - permissions of a policy record
- * @_KDBUS_POLICY_ACCESS_NULL: Uninitialized/invalid
- * @KDBUS_POLICY_ACCESS_USER: Grant access to a uid
- * @KDBUS_POLICY_ACCESS_GROUP: Grant access to gid
- * @KDBUS_POLICY_ACCESS_WORLD: World-accessible
- */
-enum kdbus_policy_access_type {
- _KDBUS_POLICY_ACCESS_NULL,
- KDBUS_POLICY_ACCESS_USER,
- KDBUS_POLICY_ACCESS_GROUP,
- KDBUS_POLICY_ACCESS_WORLD,
-};
-
-/**
- * enum kdbus_policy_access_flags - mode flags
- * @KDBUS_POLICY_OWN: Allow to own a well-known name
- * Implies KDBUS_POLICY_TALK and KDBUS_POLICY_SEE
- * @KDBUS_POLICY_TALK: Allow communication to a well-known name
- * Implies KDBUS_POLICY_SEE
- * @KDBUS_POLICY_SEE: Allow to see a well-known name
- */
-enum kdbus_policy_type {
- KDBUS_POLICY_SEE = 0,
- KDBUS_POLICY_TALK,
- KDBUS_POLICY_OWN,
-};
+ __u64 return_flags;
+ __u64 offset;
+ struct kdbus_item items[0];
+} __attribute__((__aligned__(8)));
/**
* enum kdbus_hello_flags - flags for struct kdbus_cmd_hello
* 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
KDBUS_HELLO_MONITOR = 1ULL << 3,
};
-/**
- * enum kdbus_attach_flags - flags for metadata attachments
- * @KDBUS_ATTACH_TIMESTAMP: Timestamp
- * @KDBUS_ATTACH_CREDS: Credentials
- * @KDBUS_ATTACH_AUXGROUPS: Auxiliary groups
- * @KDBUS_ATTACH_NAMES: Well-known names
- * @KDBUS_ATTACH_TID_COMM: The "comm" process identifier of the TID
- * @KDBUS_ATTACH_PID_COMM: The "comm" process identifier of the PID
- * @KDBUS_ATTACH_EXE: The path of the executable
- * @KDBUS_ATTACH_CMDLINE: The process command line
- * @KDBUS_ATTACH_CGROUP: The croup membership
- * @KDBUS_ATTACH_CAPS: The process capabilities
- * @KDBUS_ATTACH_SECLABEL: The security label
- * @KDBUS_ATTACH_AUDIT: The audit IDs
- * @KDBUS_ATTACH_CONN_DESCRIPTION: The human-readable connection name
- * @_KDBUS_ATTACH_ALL: All of the above
- * @_KDBUS_ATTACH_ANY: Wildcard match to enable any kind of
- * metatdata.
- */
-enum kdbus_attach_flags {
- KDBUS_ATTACH_TIMESTAMP = 1ULL << 0,
- KDBUS_ATTACH_CREDS = 1ULL << 1,
- KDBUS_ATTACH_AUXGROUPS = 1ULL << 2,
- KDBUS_ATTACH_NAMES = 1ULL << 3,
- KDBUS_ATTACH_TID_COMM = 1ULL << 4,
- KDBUS_ATTACH_PID_COMM = 1ULL << 5,
- KDBUS_ATTACH_EXE = 1ULL << 6,
- KDBUS_ATTACH_CMDLINE = 1ULL << 7,
- KDBUS_ATTACH_CGROUP = 1ULL << 8,
- KDBUS_ATTACH_CAPS = 1ULL << 9,
- KDBUS_ATTACH_SECLABEL = 1ULL << 10,
- KDBUS_ATTACH_AUDIT = 1ULL << 11,
- KDBUS_ATTACH_CONN_DESCRIPTION = 1ULL << 12,
- _KDBUS_ATTACH_ALL = (1ULL << 13) - 1,
- _KDBUS_ATTACH_ANY = ~0ULL
-};
-
/**
* struct kdbus_cmd_hello - struct to say hello to kdbus
* @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
* @id: The ID of this connection (kernel → userspace)
* @pool_size: Size of the connection's buffer where the received
* messages are placed
- * @bloom: The bloom properties of the bus, specified
- * by the bus creator (kernel → userspace)
+ * @offset: Pool offset where additional items of type
+ * kdbus_item_list are stored. They contain information
+ * about the bus and the newly created connection.
+ * @items_size: Copy of item_list.size stored in @offset.
* @id128: Unique 128-bit ID of the bus (kernel → userspace)
* @items: A list of items
*
struct kdbus_cmd_hello {
__u64 size;
__u64 flags;
- __u64 kernel_flags;
+ __u64 return_flags;
__u64 attach_flags_send;
__u64 attach_flags_recv;
__u64 bus_flags;
__u64 id;
__u64 pool_size;
- struct kdbus_bloom_parameter bloom;
+ __u64 offset;
+ __u64 items_size;
__u8 id128[16];
struct kdbus_item items[0];
-} __attribute__((aligned(8)));
+} __attribute__((__aligned__(8)));
/**
- * enum kdbus_make_flags - Flags for KDBUS_CMD_{BUS,EP,NS}_MAKE
- * @KDBUS_MAKE_ACCESS_GROUP: Make the device node group-accessible
- * @KDBUS_MAKE_ACCESS_WORLD: Make the device node world-accessible
- */
-enum kdbus_make_flags {
- KDBUS_MAKE_ACCESS_GROUP = 1ULL << 0,
- KDBUS_MAKE_ACCESS_WORLD = 1ULL << 1,
-};
-
-/**
- * struct kdbus_cmd_make - struct to make a bus, an endpoint or a domain
- * @size: The total size of the struct
- * @flags: Properties for the bus/ep/domain to create,
- * userspace → kernel
- * @kernel_flags: Supported flags for the used command, kernel → userspace
- * @items: Items describing details
+ * struct kdbus_info - connection information
+ * @size: total size of the struct
+ * @id: 64bit object ID
+ * @flags: object creation flags
+ * @items: list of items
*
- * This structure is used with the KDBUS_CMD_BUS_MAKE and
- * KDBUS_CMD_ENDPOINT_MAKE ioctls.
- */
-struct kdbus_cmd_make {
- __u64 size;
- __u64 flags;
- __u64 kernel_flags;
- struct kdbus_item items[0];
-} __attribute__((aligned(8)));
-
-/**
- * enum kdbus_name_flags - properties of a well-known name
- * @KDBUS_NAME_REPLACE_EXISTING: Try to replace name of other connections
- * @KDBUS_NAME_ALLOW_REPLACEMENT: Allow the replacement of the name
- * @KDBUS_NAME_QUEUE: Name should be queued if busy
- * @KDBUS_NAME_IN_QUEUE: Name is queued
- * @KDBUS_NAME_ACTIVATOR: Name is owned by a activator connection
- */
-enum kdbus_name_flags {
- KDBUS_NAME_REPLACE_EXISTING = 1ULL << 0,
- KDBUS_NAME_ALLOW_REPLACEMENT = 1ULL << 1,
- KDBUS_NAME_QUEUE = 1ULL << 2,
- KDBUS_NAME_IN_QUEUE = 1ULL << 3,
- KDBUS_NAME_ACTIVATOR = 1ULL << 4,
-};
-
-/**
- * struct kdbus_cmd_name - struct to describe a well-known name
- * @size: The total size of the struct
- * @flags: Flags for a name entry (KDBUS_NAME_*),
- * userspace → kernel, kernel → userspace
- * @kernel_flags: Supported flags for a name entry, kernel → userspace
- * @items: Item list, containing the well-known name as
- * KDBUS_ITEM_NAME
- *
- * This structure is used with the KDBUS_CMD_NAME_ACQUIRE ioctl.
+ * Note that the user is responsible for freeing the allocated memory with
+ * the KDBUS_CMD_FREE ioctl.
*/
-struct kdbus_cmd_name {
+struct kdbus_info {
__u64 size;
+ __u64 id;
__u64 flags;
- __u64 kernel_flags;
struct kdbus_item items[0];
-} __attribute__((aligned(8)));
+} __attribute__((__aligned__(8)));
/**
- * struct kdbus_name_info - struct to describe a well-known name
- * @size: The total size of the struct
- * @conn_flags: The flags of the owning connection (KDBUS_HELLO_*)
- * @owner_id: The current owner of the name
- * @items: Item list, containing the well-known name as
- * KDBUS_ITEM_OWNED_NAME
- *
- * This structure is used as return struct for the KDBUS_CMD_NAME_LIST ioctl.
+ * enum kdbus_list_flags - what to include into the returned list
+ * @KDBUS_LIST_UNIQUE: active connections
+ * @KDBUS_LIST_ACTIVATORS: activator connections
+ * @KDBUS_LIST_NAMES: known well-known names
+ * @KDBUS_LIST_QUEUED: queued-up names
*/
-struct kdbus_name_info {
- __u64 size;
- __u64 conn_flags;
- __u64 owner_id;
- struct kdbus_item items[0];
-} __attribute__((aligned(8)));
-
-/**
- * enum kdbus_name_list_flags - what to include into the returned list
- * @KDBUS_NAME_LIST_UNIQUE: All active connections
- * @KDBUS_NAME_LIST_NAMES: All known well-known names
- * @KDBUS_NAME_LIST_ACTIVATORS: All activator connections
- * @KDBUS_NAME_LIST_QUEUED: All queued-up names
- */
-enum kdbus_name_list_flags {
- KDBUS_NAME_LIST_UNIQUE = 1ULL << 0,
- KDBUS_NAME_LIST_NAMES = 1ULL << 1,
- KDBUS_NAME_LIST_ACTIVATORS = 1ULL << 2,
- KDBUS_NAME_LIST_QUEUED = 1ULL << 3,
+enum kdbus_list_flags {
+ KDBUS_LIST_UNIQUE = 1ULL << 0,
+ KDBUS_LIST_NAMES = 1ULL << 1,
+ KDBUS_LIST_ACTIVATORS = 1ULL << 2,
+ KDBUS_LIST_QUEUED = 1ULL << 3,
};
/**
- * struct kdbus_cmd_name_list - request a list of name entries
- * @flags: Flags for the query (KDBUS_NAME_LIST_*),
- * userspace → kernel
- * @kernel_flags: Supported flags for queries, kernel → userspace
- * @offset: The returned offset in the caller's pool buffer.
+ * struct kdbus_cmd_list - list connections
+ * @size: overall size of this object
+ * @flags: flags for the query (KDBUS_LIST_*), userspace → kernel
+ * @return_flags: command return flags, kernel → userspace
+ * @offset: Offset in the caller's pool buffer where an array of
+ * kdbus_info objects is stored.
* The user must use KDBUS_CMD_FREE to free the
* allocated memory.
+ * @list_size: size of returned list in bytes
+ * @items: Items for the command. Reserved for future use.
*
- * This structure is used with the KDBUS_CMD_NAME_LIST ioctl.
+ * This structure is used with the KDBUS_CMD_LIST ioctl.
*/
-struct kdbus_cmd_name_list {
+struct kdbus_cmd_list {
+ __u64 size;
__u64 flags;
- __u64 kernel_flags;
+ __u64 return_flags;
__u64 offset;
-} __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];
-};
+ __u64 list_size;
+ struct kdbus_item items[0];
+} __attribute__((__aligned__(8)));
/**
* struct kdbus_cmd_info - struct used for KDBUS_CMD_CONN_INFO ioctl
* @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.
* @offset: Returned offset in the caller's pool buffer where the
* kdbus_info struct result is stored. The user must
* use KDBUS_CMD_FREE to free the allocated memory.
+ * @info_size: Output buffer to report size of data at @offset.
* @items: The optional item list, containing the
* well-known name to look up as a KDBUS_ITEM_NAME.
* Only needed in case @id is zero.
struct kdbus_cmd_info {
__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
- * @items: A list of struct kdbus_item
- *
- * This struct is used with the KDBUS_CMD_CONN_UPDATE ioctl.
- */
-struct kdbus_cmd_update {
- __u64 size;
- __u64 flags;
- __u64 kernel_flags;
- struct kdbus_item items[0];
-} __attribute__((aligned(8)));
+} __attribute__((__aligned__(8)));
/**
* enum kdbus_cmd_match_flags - flags to control the KDBUS_CMD_MATCH_ADD ioctl
/**
* struct kdbus_cmd_match - struct to add or remove matches
* @size: The total size of the struct
- * @cookie: Userspace supplied cookie. When removing, the cookie
- * identifies the match to remove
* @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
+ * @cookie: Userspace supplied cookie. When removing, the cookie
+ * identifies the match to remove
* @items: A list of items for additional information
*
* This structure is used with the KDBUS_CMD_MATCH_ADD and
*/
struct kdbus_cmd_match {
__u64 size;
+ __u64 flags;
+ __u64 return_flags;
__u64 cookie;
+ struct kdbus_item items[0];
+} __attribute__((__aligned__(8)));
+
+/**
+ * enum kdbus_make_flags - Flags for KDBUS_CMD_{BUS,ENDPOINT}_MAKE
+ * @KDBUS_MAKE_ACCESS_GROUP: Make the bus or endpoint node group-accessible
+ * @KDBUS_MAKE_ACCESS_WORLD: Make the bus or endpoint node world-accessible
+ */
+enum kdbus_make_flags {
+ KDBUS_MAKE_ACCESS_GROUP = 1ULL << 0,
+ KDBUS_MAKE_ACCESS_WORLD = 1ULL << 1,
+};
+
+/**
+ * enum kdbus_name_flags - flags for KDBUS_CMD_NAME_ACQUIRE
+ * @KDBUS_NAME_REPLACE_EXISTING: Try to replace name of other connections
+ * @KDBUS_NAME_ALLOW_REPLACEMENT: Allow the replacement of the name
+ * @KDBUS_NAME_QUEUE: Name should be queued if busy
+ * @KDBUS_NAME_IN_QUEUE: Name is queued
+ * @KDBUS_NAME_ACTIVATOR: Name is owned by a activator connection
+ */
+enum kdbus_name_flags {
+ KDBUS_NAME_REPLACE_EXISTING = 1ULL << 0,
+ KDBUS_NAME_ALLOW_REPLACEMENT = 1ULL << 1,
+ KDBUS_NAME_QUEUE = 1ULL << 2,
+ KDBUS_NAME_IN_QUEUE = 1ULL << 3,
+ KDBUS_NAME_ACTIVATOR = 1ULL << 4,
+};
+
+/**
+ * struct kdbus_cmd - generic ioctl payload
+ * @size: Overall size of this structure
+ * @flags: Flags for this ioctl, userspace → kernel
+ * @return_flags: Ioctl return flags, kernel → userspace
+ * @items: Additional items to modify the behavior
+ *
+ * This is a generic ioctl payload object. It's used by all ioctls that only
+ * take flags and items as input.
+ */
+struct kdbus_cmd {
+ __u64 size;
__u64 flags;
- __u64 kernel_flags;
+ __u64 return_flags;
struct kdbus_item items[0];
-} __attribute__((aligned(8)));
+} __attribute__((__aligned__(8)));
/**
* Ioctl API
- * KDBUS_CMD_BUS_MAKE: After opening the "control" device node, this
- * command creates a new bus with the specified
+ *
+ * KDBUS_CMD_BUS_MAKE: After opening the "control" node, this command
+ * creates a new bus with the specified
* name. The bus is immediately shut down and
- * cleaned up when the opened "control" device node
- * is closed.
+ * cleaned up when the opened file descriptor is
+ * closed.
+ *
* KDBUS_CMD_ENDPOINT_MAKE: Creates a new named special endpoint to talk to
* the bus. Such endpoints usually carry a more
* restrictive policy and grant restricted access
* to specific applications.
- * KDBUS_CMD_HELLO: By opening the bus device node a connection is
+ * KDBUS_CMD_ENDPOINT_UPDATE: Update the properties of a custom enpoint. Used
+ * to update the policy.
+ *
+ * KDBUS_CMD_HELLO: By opening the bus node, a connection is
* created. After a HELLO the opened connection
* becomes an active peer on the bus.
+ * KDBUS_CMD_UPDATE: Update the properties of a connection. Used to
+ * update the metadata subscription mask and
+ * policy.
* KDBUS_CMD_BYEBYE: Disconnect a connection. If there are no
* messages queued up in the connection's pool,
* 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
- * the kernel.
- * KDBUS_CMD_MSG_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
- * 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
* pool.
- * KDBUS_CMD_NAME_ACQUIRE: Request a well-known bus name to associate with
- * the connection. Well-known names are used to
- * address a peer on the bus.
- * KDBUS_CMD_NAME_RELEASE: Release a well-known name the connection
- * currently owns.
- * KDBUS_CMD_NAME_LIST: Retrieve the list of all currently registered
- * well-known and unique names.
* KDBUS_CMD_CONN_INFO: Retrieve credentials and properties of the
* initial creator of the connection. The data was
* stored at registration time and does not
* necessarily represent the connected process or
* the actual state of the process.
- * KDBUS_CMD_CONN_UPDATE: Update the properties of a connection. Used to
- * update the metadata subscription mask and
- * policy.
* KDBUS_CMD_BUS_CREATOR_INFO: Retrieve information of the creator of the bus
* a connection is attached to.
- * KDBUS_CMD_ENDPOINT_UPDATE: Update the properties of a custom enpoint. Used
- * to update the policy.
- * KDBUS_CMD_MATCH_ADD: Install a match which broadcast messages should
+ *
+ * KDBUS_CMD_SEND: Send a message and pass data from userspace to
+ * the kernel.
+ * KDBUS_CMD_RECV: Receive a message from the kernel which is
+ * placed in the receiver's pool.
+ *
+ * KDBUS_CMD_NAME_ACQUIRE: Request a well-known bus name to associate with
+ * the connection. Well-known names are used to
+ * address a peer on the bus.
+ * KDBUS_CMD_NAME_RELEASE: Release a well-known name the connection
+ * currently owns.
+ * KDBUS_CMD_LIST: Retrieve the list of all currently registered
+ * well-known and unique names.
+ *
+ * KDBUS_CMD_MATCH_ADD: Install a match which broadcast messages should
* be delivered to the connection.
* KDBUS_CMD_MATCH_REMOVE: Remove a current match for broadcast messages.
*/
-#define KDBUS_CMD_BUS_MAKE _IOW(KDBUS_IOCTL_MAGIC, 0x00, \
- struct kdbus_cmd_make)
-#define KDBUS_CMD_ENDPOINT_MAKE _IOW(KDBUS_IOCTL_MAGIC, 0x10, \
- struct kdbus_cmd_make)
-
-#define KDBUS_CMD_HELLO _IOWR(KDBUS_IOCTL_MAGIC, 0x20, \
- struct kdbus_cmd_hello)
-#define KDBUS_CMD_BYEBYE _IO(KDBUS_IOCTL_MAGIC, 0x21) \
-
-#define KDBUS_CMD_MSG_SEND _IOWR(KDBUS_IOCTL_MAGIC, 0x30, \
- struct kdbus_msg)
-#define KDBUS_CMD_MSG_RECV _IOWR(KDBUS_IOCTL_MAGIC, 0x31, \
- struct kdbus_cmd_recv)
-#define KDBUS_CMD_MSG_CANCEL _IOW(KDBUS_IOCTL_MAGIC, 0x32, \
- struct kdbus_cmd_cancel)
-#define KDBUS_CMD_FREE _IOW(KDBUS_IOCTL_MAGIC, 0x33, \
- struct kdbus_cmd_free)
-
-#define KDBUS_CMD_NAME_ACQUIRE _IOWR(KDBUS_IOCTL_MAGIC, 0x40, \
- struct kdbus_cmd_name)
-#define KDBUS_CMD_NAME_RELEASE _IOW(KDBUS_IOCTL_MAGIC, 0x41, \
- struct kdbus_cmd_name)
-#define KDBUS_CMD_NAME_LIST _IOWR(KDBUS_IOCTL_MAGIC, 0x42, \
- struct kdbus_cmd_name_list)
-
-#define KDBUS_CMD_CONN_INFO _IOWR(KDBUS_IOCTL_MAGIC, 0x50, \
- struct kdbus_cmd_info)
-#define KDBUS_CMD_CONN_UPDATE _IOW(KDBUS_IOCTL_MAGIC, 0x51, \
- struct kdbus_cmd_update)
-#define KDBUS_CMD_BUS_CREATOR_INFO _IOWR(KDBUS_IOCTL_MAGIC, 0x52, \
- struct kdbus_cmd_info)
-
-#define KDBUS_CMD_ENDPOINT_UPDATE _IOW(KDBUS_IOCTL_MAGIC, 0x61, \
- struct kdbus_cmd_update)
-
-#define KDBUS_CMD_MATCH_ADD _IOW(KDBUS_IOCTL_MAGIC, 0x70, \
- struct kdbus_cmd_match)
-#define KDBUS_CMD_MATCH_REMOVE _IOW(KDBUS_IOCTL_MAGIC, 0x71, \
- struct kdbus_cmd_match)
+enum kdbus_ioctl_type {
+ /* bus owner (00-0f) */
+ KDBUS_CMD_BUS_MAKE = _IOW(KDBUS_IOCTL_MAGIC, 0x00,
+ struct kdbus_cmd),
+
+ /* endpoint owner (10-1f) */
+ KDBUS_CMD_ENDPOINT_MAKE = _IOW(KDBUS_IOCTL_MAGIC, 0x10,
+ struct kdbus_cmd),
+ KDBUS_CMD_ENDPOINT_UPDATE = _IOW(KDBUS_IOCTL_MAGIC, 0x11,
+ struct kdbus_cmd),
+
+ /* connection owner (80-ff) */
+ KDBUS_CMD_HELLO = _IOWR(KDBUS_IOCTL_MAGIC, 0x80,
+ struct kdbus_cmd_hello),
+ KDBUS_CMD_UPDATE = _IOW(KDBUS_IOCTL_MAGIC, 0x81,
+ struct kdbus_cmd),
+ KDBUS_CMD_BYEBYE = _IOW(KDBUS_IOCTL_MAGIC, 0x82,
+ struct kdbus_cmd),
+ KDBUS_CMD_FREE = _IOW(KDBUS_IOCTL_MAGIC, 0x83,
+ struct kdbus_cmd_free),
+ KDBUS_CMD_CONN_INFO = _IOR(KDBUS_IOCTL_MAGIC, 0x84,
+ struct kdbus_cmd_info),
+ KDBUS_CMD_BUS_CREATOR_INFO = _IOR(KDBUS_IOCTL_MAGIC, 0x85,
+ struct kdbus_cmd_info),
+ KDBUS_CMD_LIST = _IOR(KDBUS_IOCTL_MAGIC, 0x86,
+ struct kdbus_cmd_list),
+
+ KDBUS_CMD_SEND = _IOW(KDBUS_IOCTL_MAGIC, 0x90,
+ struct kdbus_cmd_send),
+ KDBUS_CMD_RECV = _IOR(KDBUS_IOCTL_MAGIC, 0x91,
+ struct kdbus_cmd_recv),
+
+ KDBUS_CMD_NAME_ACQUIRE = _IOW(KDBUS_IOCTL_MAGIC, 0xa0,
+ struct kdbus_cmd),
+ KDBUS_CMD_NAME_RELEASE = _IOW(KDBUS_IOCTL_MAGIC, 0xa1,
+ struct kdbus_cmd),
+
+ KDBUS_CMD_MATCH_ADD = _IOW(KDBUS_IOCTL_MAGIC, 0xb0,
+ struct kdbus_cmd_match),
+ KDBUS_CMD_MATCH_REMOVE = _IOW(KDBUS_IOCTL_MAGIC, 0xb1,
+ struct kdbus_cmd_match),
+};
#endif /* _KDBUS_UAPI_H_ */
~ianmdlvl / elogind.git / blobdiff