#define KDBUS_IOC_MAGIC 0x95
#define KDBUS_SRC_ID_KERNEL (0)
#define KDBUS_DST_ID_NAME (0)
-#define KDBUS_MATCH_SRC_ID_ANY (~0ULL)
+#define KDBUS_MATCH_ID_ANY (~0ULL)
#define KDBUS_DST_ID_BROADCAST (~0ULL)
/**
- * struct kdbus_notify_name_change - name registry change message
- * @old_id: Former owner of a name
- * @new_id: New owner of a name
- * @old_flags: flags from KDBUS_NAME_* the name entry used to have
- * @new_flags: flags from KDBUS_NAME_* the name entry has now
- * @name: Well-known name
+ * struct kdbus_notify_id_change - name registry change message
+ * @id: New or former owner of the name
+ * @flags: flags field from KDBUS_HELLO_*
*
* Sent from kernel to userspace when the owner or activator of
* a well-known name changes.
*
* Attached to:
- * KDBUS_ITEM_NAME_ADD
- * KDBUS_ITEM_NAME_REMOVE
- * KDBUS_ITEM_NAME_CHANGE
+ * KDBUS_ITEM_ID_ADD
+ * KDBUS_ITEM_ID_REMOVE
*/
-struct kdbus_notify_name_change {
- __u64 old_id;
- __u64 new_id;
- __u64 old_flags;
- __u64 new_flags;
- char name[0];
+struct kdbus_notify_id_change {
+ __u64 id;
+ __u64 flags;
};
/**
- * struct kdbus_notify_id_change - name registry change message
- * @id: New or former owner of the name
- * @flags: flags field from KDBUS_HELLO_*
+ * struct kdbus_notify_name_change - name registry change message
+ * @old: ID and flags of former owner of a name
+ * @new: ID and flags of new owner of a name
+ * @name: Well-known name
*
* Sent from kernel to userspace when the owner or activator of
* a well-known name changes.
*
* Attached to:
- * KDBUS_ITEM_ID_ADD
- * KDBUS_ITEM_ID_REMOVE
+ * KDBUS_ITEM_NAME_ADD
+ * KDBUS_ITEM_NAME_REMOVE
+ * KDBUS_ITEM_NAME_CHANGE
*/
-struct kdbus_notify_id_change {
- __u64 id;
- __u64 flags;
+struct kdbus_notify_name_change {
+ struct kdbus_notify_id_change old;
+ struct kdbus_notify_id_change new;
+ char name[0];
};
/**
* struct kdbus_vec - I/O vector for kdbus payload items
* @size: The size of the vector
* @address: Memory address for memory addresses
- * @offset: Offset in the in-message payload memory
+ * @offset: Offset in the in-message payload memory,
+ * relative to the message head
*
* Attached to:
* KDBUS_ITEM_PAYLOAD_VEC
/**
* enum kdbus_item_type - item types to chain data in a list
* @KDBUS_ITEM_PAYLOAD_VEC: Vector to data
- * @KDBUS_ITEM_PAYLOAD_OFF: Data at returned offset in the pool
+ * @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_BLOOM: For broadcasts, carries bloom filter
+ * @KDBUS_ITEM_BLOOM_SIZE: Desired bloom size, used by KDBUS_CMD_BUS_MAKE
* @KDBUS_ITEM_DST_NAME: Destination's well-known name
* @KDBUS_ITEM_PRIORITY: Queue priority for message
* @KDBUS_ITEM_MAKE_NAME: Name of namespace, bus, endpoint
* @KDBUS_ITEM_POLICY_NAME: Policy in struct kdbus_policy
* @KDBUS_ITEM_POLICY_ACCESS: Policy in struct kdbus_policy
* @KDBUS_ITEM_NAME: Well-know name with flags
- * @KDBUS_ITEM_ACTIVATOR_NAME: Well-known name for the activator
+ * @KDBUS_ITEM_ID: Connection ID
* @KDBUS_ITEM_TIMESTAMP: Timestamp
* @KDBUS_ITEM_CREDS: Process credential
* @KDBUS_ITEM_PID_COMM: Process ID "comm" identifier
KDBUS_ITEM_PAYLOAD_MEMFD,
KDBUS_ITEM_FDS,
KDBUS_ITEM_BLOOM,
+ KDBUS_ITEM_BLOOM_SIZE,
KDBUS_ITEM_DST_NAME,
KDBUS_ITEM_PRIORITY,
KDBUS_ITEM_MAKE_NAME,
_KDBUS_ITEM_ATTACH_BASE = 0x600,
KDBUS_ITEM_NAME = _KDBUS_ITEM_ATTACH_BASE,
- KDBUS_ITEM_ACTIVATOR_NAME,
+ KDBUS_ITEM_ID,
KDBUS_ITEM_TIMESTAMP,
KDBUS_ITEM_CREDS,
KDBUS_ITEM_PID_COMM,
__u64 timeout_ns;
};
struct kdbus_item items[0];
-};
+} __attribute__((aligned(8)));
/**
* enum kdbus_policy_access_type - permissions of a policy record
struct kdbus_cmd_policy {
__u64 size;
struct kdbus_item policies[0];
-};
+} __attribute__((aligned(8)));
/**
* enum kdbus_hello_flags - flags for struct kdbus_cmd_hello
__u64 pool_size;
__u8 id128[16];
struct kdbus_item items[0];
-};
+} __attribute__((aligned(8)));
/* Flags for KDBUS_CMD_{BUS,EP,NS}_MAKE */
enum kdbus_make_flags {
};
/**
- * struct kdbus_cmd_bus_make - struct to make a bus
- * @size: The total size of the struct
- * @flags: Properties for the bus to create
- * @bloom_size: Size of the bloom filter for this bus
- * @items: Items describing details such as the name of the bus
- *
- * This structure is used with the KDBUS_CMD_BUS_MAKE ioctl.
- */
-struct kdbus_cmd_bus_make {
- __u64 size;
- __u64 flags;
- __u64 bloom_size;
- struct kdbus_item items[0];
-};
-
-/**
- * struct kdbus_cmd_ep_make - struct to make an endpoint
+ * struct kdbus_cmd_make - struct to make a bus, an endpoint or a namespace
* @size: The total size of the struct
- * @flags: Unused for now
- * @items: Items describing details such as the
- * name of the endpoint
+ * @flags: Properties for the bus/ep/ns to create
+ * @items: Items describing details
*
- * This structure is used with the KDBUS_CMD_EP_MAKE ioctl.
+ * This structure is used with the KDBUS_CMD_BUS_MAKE, KDBUS_CMD_EP_MAKE and
+ * KDBUS_CMD_NS_MAKE ioctls.
*/
-struct kdbus_cmd_ep_make {
+struct kdbus_cmd_make {
__u64 size;
__u64 flags;
struct kdbus_item items[0];
-};
-
-/**
- * struct kdbus_cmd_ns_make - struct to make a namespace
- * @size: The total size of the struct
- * @flags: Unused for now
- * @items: Items describing details such as the
- * name of the namespace
- *
- * This structure is used with the KDBUS_CMD_NS_MAKE ioctl.
- */
-struct kdbus_cmd_ns_make {
- __u64 size;
- __u64 flags;
- struct kdbus_item items[0];
-};
+} __attribute__((aligned(8)));
/**
* enum kdbus_name_flags - properties of a well-known name
* @KDBUS_NAME_ACTIVATOR: Name is owned by a activator connection
*/
enum kdbus_name_flags {
- KDBUS_NAME_REPLACE_EXISTING = 1 << 0,
- KDBUS_NAME_ALLOW_REPLACEMENT = 1 << 1,
- KDBUS_NAME_QUEUE = 1 << 2,
- KDBUS_NAME_IN_QUEUE = 1 << 3,
- KDBUS_NAME_ACTIVATOR = 1 << 4,
+ KDBUS_NAME_REPLACE_EXISTING = 1 << 0,
+ KDBUS_NAME_ALLOW_REPLACEMENT = 1 << 1,
+ KDBUS_NAME_QUEUE = 1 << 2,
+ KDBUS_NAME_IN_QUEUE = 1 << 3,
+ KDBUS_NAME_ACTIVATOR = 1 << 4,
};
/**
__u64 id;
__u64 conn_flags;
char name[0];
-};
+} __attribute__((aligned(8)));
/**
* enum kdbus_name_list_flags - what to include into the returned list
* @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 flags;
__u64 offset;
-};
+} __attribute__((aligned(8)));
/**
* struct kdbus_name_list - information returned by KDBUS_CMD_NAME_LIST
__u64 id;
__u64 offset;
char name[0];
-};
+} __attribute__((aligned(8)));
/**
* struct kdbus_conn_info - information returned by KDBUS_CMD_CONN_INFO
struct kdbus_item items[0];
};
-/**
- * enum kdbus_match_type - type of match record
- * @KDBUS_MATCH_BLOOM: Matches against KDBUS_MSG_BLOOM
- * @KDBUS_MATCH_SRC_NAME: Matches a name string
- * @KDBUS_MATCH_NAME_ADD: Matches a name string
- * @KDBUS_MATCH_NAME_REMOVE: Matches a name string
- * @KDBUS_MATCH_NAME_CHANGE: Matches a name string
- * @KDBUS_MATCH_ID_ADD: Matches an ID
- * @KDBUS_MATCH_ID_REMOVE: Matches an ID
- */
-enum kdbus_match_type {
- _KDBUS_MATCH_NULL,
- KDBUS_MATCH_BLOOM,
- KDBUS_MATCH_SRC_NAME,
- KDBUS_MATCH_NAME_ADD,
- KDBUS_MATCH_NAME_REMOVE,
- KDBUS_MATCH_NAME_CHANGE,
- KDBUS_MATCH_ID_ADD,
- KDBUS_MATCH_ID_REMOVE,
-};
-
/**
* struct kdbus_cmd_match - struct to add or remove matches
* @size: The total size of the struct
* of other peers. In other cases, set to 0.
* @cookie: Userspace supplied cookie. When removing, the cookie
* identifies the match to remove.
- * @src_id: The source ID to match against. Use
- * KDBUS_MATCH_SRC_ID_ANY or any other value for a unique
- * match.
* @items: A list of items for additional information
*
* This structure is used with the KDBUS_CMD_ADD_MATCH and
__u64 size;
__u64 id;
__u64 cookie;
- __u64 src_id;
struct kdbus_item items[0];
-};
+} __attribute__((aligned(8)));
/**
* enum kdbus_ioctl_type - Ioctl API
* @KDBUS_CMD_HELLO: By opening the bus device node a connection is
* created. After a HELLO the opened connection
* becomes an active peer on the bus.
+ * @KDBUS_CMD_BYEBYE: Disconnect a connection. If the connection's
+ * message list is empty, the calls succeeds, and
+ * the handle is rendered unusable. Otherwise,
+ * -EAGAIN 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_FREE: Release the allocated memory in the receiver's
* pool.
+ * @KDBUS_CMD_DROP: Drop and free the next queued message and all
+ * its ressources without actually receiveing it.
+ * @KDBUS_CMD_SRC: Return the sender's connection ID of the next
+ * queued message.
* @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.
* be changed as long as the file is shared.
*/
enum kdbus_ioctl_type {
- KDBUS_CMD_BUS_MAKE = _IOW (KDBUS_IOC_MAGIC, 0x00, struct kdbus_cmd_bus_make),
- KDBUS_CMD_NS_MAKE = _IOR (KDBUS_IOC_MAGIC, 0x10, struct kdbus_cmd_ns_make),
+ KDBUS_CMD_BUS_MAKE = _IOW (KDBUS_IOC_MAGIC, 0x00, struct kdbus_cmd_make),
+ KDBUS_CMD_NS_MAKE = _IOR (KDBUS_IOC_MAGIC, 0x10, struct kdbus_cmd_make),
+ KDBUS_CMD_EP_MAKE = _IOW (KDBUS_IOC_MAGIC, 0x20, struct kdbus_cmd_make),
- KDBUS_CMD_EP_MAKE = _IOW (KDBUS_IOC_MAGIC, 0x20, struct kdbus_cmd_ep_make),
KDBUS_CMD_HELLO = _IOWR(KDBUS_IOC_MAGIC, 0x30, struct kdbus_cmd_hello),
+ KDBUS_CMD_BYEBYE = _IO (KDBUS_IOC_MAGIC, 0x31),
KDBUS_CMD_MSG_SEND = _IOW (KDBUS_IOC_MAGIC, 0x40, struct kdbus_msg),
KDBUS_CMD_MSG_RECV = _IOR (KDBUS_IOC_MAGIC, 0x41, __u64 *),
KDBUS_CMD_FREE = _IOW (KDBUS_IOC_MAGIC, 0x42, __u64 *),
+ KDBUS_CMD_MSG_DROP = _IO (KDBUS_IOC_MAGIC, 0x43),
+ KDBUS_CMD_MSG_SRC = _IOR (KDBUS_IOC_MAGIC, 0x44, __u64 *),
KDBUS_CMD_NAME_ACQUIRE = _IOWR(KDBUS_IOC_MAGIC, 0x50, struct kdbus_cmd_name),
KDBUS_CMD_NAME_RELEASE = _IOW (KDBUS_IOC_MAGIC, 0x51, struct kdbus_cmd_name),
* @ENOTUNIQ: A specific data type was addressed to a broadcast
* address, but only direct addresses support this kind of
* data.
- * @ENXIO: A unique address does not exist.
+ * @ENXIO: A unique address does not exist, or an offset in the
+ * receiver's pool does not represent a queued message.
* @EPERM: The policy prevented an operation. The requested
* resource is owned by another entity.
* @ESHUTDOWN: A namespace or endpoint is currently shutting down;