* struct kdbus_memfd - a kdbus memfd
* @size: The memfd's size
* @fd: The file descriptor number
- * @__pad: Padding to make the struct aligned
+ * @__pad: Padding to ensure proper alignement and size
*
* Attached to:
* KDBUS_ITEM_PAYLOAD_MEMFD
* @KDBUS_ITEM_BLOOM_SIZE: Desired bloom size, used by KDBUS_CMD_BUS_MAKE
* @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_CAPS: The process capabilities
* @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_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_BLOOM_SIZE,
KDBUS_ITEM_DST_NAME,
KDBUS_ITEM_MAKE_NAME,
+ KDBUS_ITEM_MEMFD_NAME,
- _KDBUS_ITEM_POLICY_BASE = 0x400,
+ _KDBUS_ITEM_POLICY_BASE = 0x1000,
KDBUS_ITEM_POLICY_NAME = _KDBUS_ITEM_POLICY_BASE,
KDBUS_ITEM_POLICY_ACCESS,
- _KDBUS_ITEM_ATTACH_BASE = 0x600,
+ _KDBUS_ITEM_ATTACH_BASE = 0x2000,
KDBUS_ITEM_NAME = _KDBUS_ITEM_ATTACH_BASE,
KDBUS_ITEM_ID,
KDBUS_ITEM_TIMESTAMP,
KDBUS_ITEM_CAPS,
KDBUS_ITEM_SECLABEL,
KDBUS_ITEM_AUDIT,
+ KDBUS_ITEM_CONN_NAME,
- _KDBUS_ITEM_KERNEL_BASE = 0x800,
+ _KDBUS_ITEM_KERNEL_BASE = 0x3000,
KDBUS_ITEM_NAME_ADD = _KDBUS_ITEM_KERNEL_BASE,
KDBUS_ITEM_NAME_REMOVE,
KDBUS_ITEM_NAME_CHANGE,
* struct kdbus_msg - the representation of a kdbus message
* @size: Total size of the message
* @flags: Message flags (KDBUS_MSG_FLAGS_*)
+ * @priority: Message queue priority value
* @dst_id: 64-bit ID of the destination connection
* @src_id: 64-bit ID of the source connection
* @payload_type: Payload type (KDBUS_PAYLOAD_*)
* @cookie: Userspace-supplied cookie, for the connection
* to identify its messages
- * @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
* @timeout_ns: The time to wait for a message reply from the peer.
* If there is no reply, a kernel-generated message
* with an attached KDBUS_ITEM_REPLY_TIMEOUT item
* is sent to @src_id.
+ * @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
* @items: A list of kdbus_items containing the message payload
*/
struct kdbus_msg {
__u64 size;
__u64 flags;
+ __s64 priority;
__u64 dst_id;
__u64 src_id;
__u64 payload_type;
__u64 cookie;
union {
- __u64 cookie_reply;
__u64 timeout_ns;
+ __u64 cookie_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
+ * actually de-queuing it, and without installing
+ * any file descriptors or other resources. It is
+ * usually used to determine the activating
+ * connection of a bus name.
+ * @KDBUS_RECV_DROP: Drop and free the next queued message and all
+ * its resources without actually receiving it.
+ * @KDBUS_RECV_USE_PRIORITY: Only de-queue messages with the specified or
+ * higher priority (lowest values); if not set,
+ * the priority value is ignored.
+ */
+enum kdbus_recv_flags {
+ KDBUS_RECV_PEEK = 1 << 0,
+ KDBUS_RECV_DROP = 1 << 1,
+ KDBUS_RECV_USE_PRIORITY = 1 << 2,
+};
+
+/**
+ * kdbus_cmd_recv - struct to de-queue a buffered message
+ * @flags: KDBUS_RECV_* flags
+ * @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.
+ *
+ * This struct is used with the KDBUS_CMD_MSG_RECV ioctl.
+ */
+struct kdbus_cmd_recv {
+ __u64 flags;
+ __s64 priority;
+ __u64 offset;
+} __attribute__((aligned(8)));
+
/**
* enum kdbus_policy_access_type - permissions of a policy record
* @_KDBUS_POLICY_ACCESS_NULL: Uninitialized/invalid
* @KDBUS_ATTACH_CAPS: The process capabilities
* @KDBUS_ATTACH_SECLABEL: The security label
* @KDBUS_ATTACH_AUDIT: The audit IDs
+ * @KDBUS_ATTACH_CONN_NAME: The human-readable connection name
*/
enum kdbus_attach_flags {
KDBUS_ATTACH_TIMESTAMP = 1 << 0,
KDBUS_ATTACH_CAPS = 1 << 7,
KDBUS_ATTACH_SECLABEL = 1 << 8,
KDBUS_ATTACH_AUDIT = 1 << 9,
+ KDBUS_ATTACH_CONN_NAME = 1 << 10,
};
/**
* @id128: Unique 128-bit ID of the bus (kernel → userspace)
* @items: A list of items
*
- * This struct is used with the KDBUS_CMD_HELLO ioctl. See the ioctl
- * documentation for more information.
+ * This struct is used with the KDBUS_CMD_HELLO ioctl.
*/
struct kdbus_cmd_hello {
__u64 size;
struct kdbus_item items[0];
} __attribute__((aligned(8)));
+/**
+ * struct kdbus_cmd_memfd_make - create a kdbus memfd
+ * @size: The total size of the struct
+ * @file_size: The initial file size
+ * @fd: The returned file descriptor number
+ * @__pad: Padding to ensure proper alignement
+ * @items: A list of items for additional information
+ *
+ * This structure is used with the KDBUS_CMD_MEMFD_NEW ioctl.
+ */
+struct kdbus_cmd_memfd_make {
+ __u64 size;
+ __u64 file_size;
+ int fd;
+ __u32 __pad;
+ struct kdbus_item items[0];
+} __attribute__((aligned(8)));
+
/**
* enum kdbus_ioctl_type - Ioctl API
* @KDBUS_CMD_BUS_MAKE: After opening the "control" device node, this
* 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.
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_MSG_RECV = _IOWR(KDBUS_IOC_MAGIC, 0x41, struct kdbus_cmd_recv),
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),
KDBUS_CMD_EP_POLICY_SET = _IOW (KDBUS_IOC_MAGIC, 0x80, struct kdbus_cmd_policy),
- KDBUS_CMD_MEMFD_NEW = _IOR (KDBUS_IOC_MAGIC, 0x90, int *),
- KDBUS_CMD_MEMFD_SIZE_GET = _IOR (KDBUS_IOC_MAGIC, 0x91, __u64 *),
- KDBUS_CMD_MEMFD_SIZE_SET = _IOW (KDBUS_IOC_MAGIC, 0x92, __u64 *),
- KDBUS_CMD_MEMFD_SEAL_GET = _IOR (KDBUS_IOC_MAGIC, 0x93, int *),
- KDBUS_CMD_MEMFD_SEAL_SET = _IO (KDBUS_IOC_MAGIC, 0x94),
+ KDBUS_CMD_MEMFD_NEW = _IOWR(KDBUS_IOC_MAGIC, 0xc0, struct kdbus_cmd_memfd_make),
+ KDBUS_CMD_MEMFD_SIZE_GET = _IOR (KDBUS_IOC_MAGIC, 0xc1, __u64 *),
+ KDBUS_CMD_MEMFD_SIZE_SET = _IOW (KDBUS_IOC_MAGIC, 0xc2, __u64 *),
+ KDBUS_CMD_MEMFD_SEAL_GET = _IOR (KDBUS_IOC_MAGIC, 0xc3, int *),
+ KDBUS_CMD_MEMFD_SEAL_SET = _IO (KDBUS_IOC_MAGIC, 0xc4),
};
/*
* @ENOENT: The name to query information about is currently not on
* the bus.
* @ENOMEM: Out of memory.
+ * @ENOMSG: The queue is not empty, but no message with a matching
+ * priority is currently queued.
* @ENOSYS: The requested functionality is not available.
* @ENOTSUPP: The feature negotiation failed, a not supported feature
* was requested, or an unknown item type was received.
~ianmdlvl / elogind.git / blobdiff