};
};
+/**
+ * struct kdbus_bloom_parameter - bus-wide bloom parameters
+ * @size: Size of the bit field in bytes (m / 8)
+ * @n_hash: Number of hash functions used (k)
+ */
+struct kdbus_bloom_parameter {
+ __u64 size;
+ __u64 n_hash;
+};
+
+/**
+ * struct kdbus_bloom_filter - bloom filter containing n elements
+ * @generation: Generation of the element set in the filter
+ * @data: Bit field, multiple of 8 bytes
+ */
+struct kdbus_bloom_filter {
+ __u64 generation;
+ __u64 data[0];
+};
+
/**
* struct kdbus_memfd - a kdbus memfd
* @size: The memfd's size
* @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_BLOOM_PARAMETER: Bus-wide bloom parameters, used with
+ * KDBUS_CMD_BUS_MAKE, carries a
+ * struct kdbus_bloom_parameter
+ * @KDBUS_ITEM_BLOOM_FILTER: Bloom filter carried with a message, used to
+ * match against a bloom mask of a connection,
+ * carries a struct kdbus_bloom_filter
+ * @KDBUS_ITEM_BLOOM_MASK: Bloom mask used to match against a message's
+ * bloom filter
* @KDBUS_ITEM_DST_NAME: Destination's well-known name
* @KDBUS_ITEM_MAKE_NAME: Name of namespace, bus, endpoint
* @KDBUS_ITEM_MEMFD_NAME: The human readable name of a memfd (debugging)
- * @_KDBUS_ITEM_POLICY_BASE: Start of policy items
- * @KDBUS_ITEM_POLICY_NAME: Policy in struct kdbus_policy
- * @KDBUS_ITEM_POLICY_ACCESS: Policy in struct kdbus_policy
+ * @KDBUS_ITEM_ATTACH_FLAGS: Attach-flags, used for updating which metadata
+ * a connection subscribes to
* @_KDBUS_ITEM_ATTACH_BASE: Start of metadata attach items
* @KDBUS_ITEM_NAME: Well-know name with flags
* @KDBUS_ITEM_ID: Connection ID
* @KDBUS_ITEM_SECLABEL: The security label
* @KDBUS_ITEM_AUDIT: The audit IDs
* @KDBUS_ITEM_CONN_NAME: The connection's human-readable name (debugging)
+ * @_KDBUS_ITEM_POLICY_BASE: Start of policy items
+ * @KDBUS_ITEM_POLICY_NAME: Policy in struct kdbus_policy
+ * @KDBUS_ITEM_POLICY_ACCESS: Policy in struct kdbus_policy
* @_KDBUS_ITEM_KERNEL_BASE: Start of kernel-generated message items
* @KDBUS_ITEM_NAME_ADD: Notify in struct kdbus_notify_name_change
* @KDBUS_ITEM_NAME_REMOVE: Notify in struct kdbus_notify_name_change
KDBUS_ITEM_PAYLOAD_OFF,
KDBUS_ITEM_PAYLOAD_MEMFD,
KDBUS_ITEM_FDS,
- KDBUS_ITEM_BLOOM,
- KDBUS_ITEM_BLOOM_SIZE,
+ KDBUS_ITEM_BLOOM_PARAMETER,
+ KDBUS_ITEM_BLOOM_FILTER,
+ KDBUS_ITEM_BLOOM_MASK,
KDBUS_ITEM_DST_NAME,
KDBUS_ITEM_MAKE_NAME,
KDBUS_ITEM_MEMFD_NAME,
+ KDBUS_ITEM_ATTACH_FLAGS,
- _KDBUS_ITEM_POLICY_BASE = 0x1000,
- KDBUS_ITEM_POLICY_NAME = _KDBUS_ITEM_POLICY_BASE,
- KDBUS_ITEM_POLICY_ACCESS,
-
- _KDBUS_ITEM_ATTACH_BASE = 0x2000,
+ _KDBUS_ITEM_ATTACH_BASE = 0x1000,
KDBUS_ITEM_NAME = _KDBUS_ITEM_ATTACH_BASE,
KDBUS_ITEM_ID,
KDBUS_ITEM_TIMESTAMP,
KDBUS_ITEM_AUDIT,
KDBUS_ITEM_CONN_NAME,
- _KDBUS_ITEM_KERNEL_BASE = 0x3000,
+ _KDBUS_ITEM_POLICY_BASE = 0x2000,
+ KDBUS_ITEM_POLICY_NAME = _KDBUS_ITEM_POLICY_BASE,
+ KDBUS_ITEM_POLICY_ACCESS,
+
+ _KDBUS_ITEM_KERNEL_BASE = 0x8000,
KDBUS_ITEM_NAME_ADD = _KDBUS_ITEM_KERNEL_BASE,
KDBUS_ITEM_NAME_REMOVE,
KDBUS_ITEM_NAME_CHANGE,
* @audit: KDBUS_ITEM_AUDIT
* @timestamp: KDBUS_ITEM_TIMESTAMP
* @name: KDBUS_ITEM_NAME
+ * @bloom_parameter: KDBUS_ITEM_BLOOM_PARAMETER
+ * @bloom_filter: KDBUS_ITEM_BLOOM_FILTER
* @memfd: KDBUS_ITEM_PAYLOAD_MEMFD
* @name_change: KDBUS_ITEM_NAME_ADD
* KDBUS_ITEM_NAME_REMOVE
struct kdbus_audit audit;
struct kdbus_timestamp timestamp;
struct kdbus_name name;
+ struct kdbus_bloom_parameter bloom_parameter;
+ struct kdbus_bloom_filter bloom_filter;
struct kdbus_memfd memfd;
int fds[0];
struct kdbus_notify_name_change name_change;
* to do negotiation of features of the payload that is
* transferred (kernel → userspace)
* @id: The ID of this connection (kernel → userspace)
- * @bloom_size: The bloom filter size chosen by the owner
- * (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)
* @id128: Unique 128-bit ID of the bus (kernel → userspace)
* @items: A list of items
*
__u64 attach_flags;
__u64 bus_flags;
__u64 id;
- __u64 bloom_size;
__u64 pool_size;
+ struct kdbus_bloom_parameter bloom;
__u8 id128[16];
struct kdbus_item items[0];
} __attribute__((aligned(8)));
struct kdbus_item items[0];
};
+/**
+ * struct kdbus_cmd_conn_update - update flags of a connection
+ * @size: The total size of the struct
+ * @items: A list of struct kdbus_item
+ *
+ * This struct is used with the KDBUS_CMD_CONN_UPDATE ioctl.
+ */
+struct kdbus_cmd_conn_update {
+ __u64 size;
+ struct kdbus_item items[0];
+} __attribute__((aligned(8)));
+
/**
* struct kdbus_cmd_match - struct to add or remove matches
* @size: The total size of the struct
* 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
* 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.
* @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.
KDBUS_CMD_MSG_SEND = _IOW (KDBUS_IOC_MAGIC, 0x40, struct kdbus_msg),
KDBUS_CMD_MSG_RECV = _IOWR(KDBUS_IOC_MAGIC, 0x41, struct kdbus_cmd_recv),
+ KDBUS_CMD_MSG_CANCEL = _IOW (KDBUS_IOC_MAGIC, 0x43, __u64 *),
KDBUS_CMD_FREE = _IOW (KDBUS_IOC_MAGIC, 0x42, __u64 *),
KDBUS_CMD_NAME_ACQUIRE = _IOWR(KDBUS_IOC_MAGIC, 0x50, struct kdbus_cmd_name),
KDBUS_CMD_NAME_LIST = _IOWR(KDBUS_IOC_MAGIC, 0x52, struct kdbus_cmd_name_list),
KDBUS_CMD_CONN_INFO = _IOWR(KDBUS_IOC_MAGIC, 0x60, struct kdbus_cmd_conn_info),
+ KDBUS_CMD_CONN_UPDATE = _IOW (KDBUS_IOC_MAGIC, 0x61, struct kdbus_cmd_conn_update),
KDBUS_CMD_MATCH_ADD = _IOW (KDBUS_IOC_MAGIC, 0x70, struct kdbus_cmd_match),
KDBUS_CMD_MATCH_REMOVE = _IOW (KDBUS_IOC_MAGIC, 0x71, struct kdbus_cmd_match),
* inconsistent types.
* @EBUSY: The user tried to say BYEBYE to a connection, but the
* connection had a non-empty message list.
+ * @ECANCELED: A syncronous message sending was cancelled.
* @ECONNRESET: A connection is shut down, no further operations are
* possible.
* @ECOMM: A peer does not accept the file descriptors addressed
* to it.
* @EDESTADDRREQ: The well-known bus name is required but missing.
* @EDOM: The size of data does not match the expectations. Used
- * for the size of the bloom filter bit field.
+ * for bloom bit field sizes.
* @EEXIST: A requested namespace, bus or endpoint with the same
* name already exists. A specific data type, which is
* only expected once, is provided multiple times.
* refused to send as KDBUS_MSG_PAYLOAD_MEMFD.
* @EMFILE: Too many file descriptors have been supplied with a
* message.
+ * Too many connections or buses are created for a given
+ * user.
* @EMLINK: Too many requests from this connection to other peers
* are queued and waiting for a reply
* @EMSGSIZE: The supplied data is larger than the allowed maximum
* receiver's pool does not represent a queued message.
* @EPERM: The policy prevented an operation. The requested
* resource is owned by another entity.
+ * @EPIPE: When sending a message, a synchronous reply from the
+ * receiving connection was expected but the connection
+ * died before answering.
* @ESHUTDOWN: A namespace or endpoint is currently shutting down;
* no further operations will be possible.
* @ESRCH: A requested well-known bus name is not found.
+ * @ETIMEDOUT: A synchronous wait for a message reply did not arrive
+ * within the specified time frame.
* @ETXTBSY: A kdbus memfd file cannot be sealed or the seal removed,
* because it is shared with other processes or still
* mmap()ed.
~ianmdlvl / elogind.git / blobdiff