bus: update kdbus.h (ABI break)
This commit is contained in:
Kay Sievers
+117
-114
@@ -102,6 +102,7 @@ struct kdbus_audit {
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/**
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* struct kdbus_timestamp
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* @seqnum: Global per-namespace message sequence number
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* @monotonic_ns: Monotonic timestamp, in nanoseconds
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* @realtime_ns: Realtime timestamp, in nanoseconds
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*
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@@ -109,6 +110,7 @@ struct kdbus_audit {
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* KDBUS_ITEM_TIMESTAMP
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*/
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struct kdbus_timestamp {
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__u64 seqnum;
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__u64 monotonic_ns;
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__u64 realtime_ns;
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};
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@@ -118,7 +120,7 @@ struct kdbus_timestamp {
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* @size: The size of the vector
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* @address: Memory address for memory addresses
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* @offset: Offset in the in-message payload memory,
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* relative to the message head
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* relative to the message head
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*
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* Attached to:
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* KDBUS_ITEM_PAYLOAD_VEC
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@@ -164,7 +166,7 @@ struct kdbus_name {
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* @type: One of KDBUS_POLICY_ACCESS_* types
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* @bits: Access to grant. One of KDBUS_POLICY_*
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* @id: For KDBUS_POLICY_ACCESS_USER, the uid
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* For KDBUS_POLICY_ACCESS_GROUP, the gid
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* For KDBUS_POLICY_ACCESS_GROUP, the gid
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*
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* Embedded in:
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* struct kdbus_policy
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@@ -284,12 +286,12 @@ enum kdbus_item_type {
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* @name: KDBUS_ITEM_NAME
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* @memfd: KDBUS_ITEM_PAYLOAD_MEMFD
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* @name_change: KDBUS_ITEM_NAME_ADD
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* KDBUS_ITEM_NAME_REMOVE
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* KDBUS_ITEM_NAME_CHANGE
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* KDBUS_ITEM_NAME_REMOVE
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* KDBUS_ITEM_NAME_CHANGE
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* @id_change: KDBUS_ITEM_ID_ADD
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* KDBUS_ITEM_ID_REMOVE
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* KDBUS_ITEM_ID_REMOVE
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* @policy: KDBUS_ITEM_POLICY_NAME
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* KDBUS_ITEM_POLICY_ACCESS
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* KDBUS_ITEM_POLICY_ACCESS
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*/
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struct kdbus_item {
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__u64 size;
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@@ -317,12 +319,12 @@ struct kdbus_item {
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/**
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* enum kdbus_msg_flags - type of message
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* @KDBUS_MSG_FLAGS_EXPECT_REPLY: Expect a reply message, used for
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* method calls. The userspace-supplied
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* cookie identifies the message and the
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* respective reply carries the cookie
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* in cookie_reply
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* method calls. The userspace-supplied
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* cookie identifies the message and the
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* respective reply carries the cookie
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* in cookie_reply
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* @KDBUS_MSG_FLAGS_NO_AUTO_START: Do not start a service, if the addressed
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* name is not currently active
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* name is not currently active
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*/
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enum kdbus_msg_flags {
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KDBUS_MSG_FLAGS_EXPECT_REPLY = 1 << 0,
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@@ -347,14 +349,14 @@ enum kdbus_payload_type {
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* @src_id: 64-bit ID of the source connection
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* @payload_type: Payload type (KDBUS_PAYLOAD_*)
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* @cookie: Userspace-supplied cookie, for the connection
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* to identify its messages
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* to identify its messages
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* @cookie_reply: A reply to the requesting message with the same
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* cookie. The requesting connection can match its
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* request and the reply with this value
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* cookie. The requesting connection can match its
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* request and the reply with this value
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* @timeout_ns: The time to wait for a message reply from the peer.
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* If there is no reply, a kernel-generated message
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* with an attached KDBUS_ITEM_REPLY_TIMEOUT item
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* is sent to @src_id.
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* If there is no reply, a kernel-generated message
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* with an attached KDBUS_ITEM_REPLY_TIMEOUT item
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* is sent to @src_id.
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* @items: A list of kdbus_items containing the message payload
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*/
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struct kdbus_msg {
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@@ -414,12 +416,12 @@ struct kdbus_cmd_policy {
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/**
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* enum kdbus_hello_flags - flags for struct kdbus_cmd_hello
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* @KDBUS_HELLO_ACCEPT_FD: The connection allows the receiving of
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* any passed file descriptors
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* any passed file descriptors
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* @KDBUS_HELLO_ACTIVATOR: Special-purpose connection which registers
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* a well-know name for a process to be started
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* when traffic arrives
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* a well-know name for a process to be started
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* when traffic arrives
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* @KDBUS_HELLO_MONITOR: Special-purpose connection to monitor
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* bus traffic
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* bus traffic
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*/
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enum kdbus_hello_flags {
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KDBUS_HELLO_ACCEPT_FD = 1 << 0,
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@@ -457,18 +459,18 @@ enum kdbus_attach_flags {
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* struct kdbus_cmd_hello - struct to say hello to kdbus
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* @size: The total size of the structure
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* @conn_flags: Connection flags (KDBUS_HELLO_*). The kernel will
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* return its capabilities in that field.
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* return its capabilities in that field.
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* @attach_flags: Mask of metadata to attach to each message sent
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* (KDBUS_ATTACH_*)
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* (KDBUS_ATTACH_*)
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* @bus_flags: The flags field copied verbatim from the original
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* KDBUS_CMD_BUS_MAKE ioctl. It's intended to be useful
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* KDBUS_CMD_BUS_MAKE ioctl. It's intended to be useful
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* to do negotiation of features of the payload that is
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* transferred (kernel → userspace)
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* @id: The ID of this connection (kernel → userspace)
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* @bloom_size: The bloom filter size chosen by the owner
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* (kernel → userspace)
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* (kernel → userspace)
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* @pool_size: Size of the connection's buffer where the received
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* messages are placed
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* messages are placed
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* @id128: Unique 128-bit ID of the bus (kernel → userspace)
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* @items: A list of items
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*
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@@ -530,8 +532,8 @@ enum kdbus_name_flags {
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* @size: The total size of the struct
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* @flags: Flags for a name entry (KDBUS_NAME_*)
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* @owner_id: The current owner of the name. For requests,
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* privileged users may set this field to
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* (de)register names on behalf of other connections.
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* privileged users may set this field to
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* (de)register names on behalf of other connections.
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* @conn_flags: The flags of the owning connection (KDBUS_HELLO_*)
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* @name: The well-known name
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*
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@@ -591,13 +593,13 @@ struct kdbus_name_list {
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* @size: The total size of the struct
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* @flags: KDBUS_ATTACH_* flags
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* @id: The 64-bit ID of the connection. If set to zero, passing
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* @name is required. kdbus will look up the name to determine
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* the ID in this case.
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* @name is required. kdbus will look up the name to
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* determine the ID in this case.
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* @offset: Returned offset in the caller's pool buffer where the
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* kdbus_conn_info struct result is stored. The user must
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* use KDBUS_CMD_FREE to free the allocated memory.
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* kdbus_conn_info struct result is stored. The user must
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* use KDBUS_CMD_FREE to free the allocated memory.
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* @name: The optional well-known name to look up. Only needed in
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* case @id is zero.
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* case @id is zero.
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*
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* On success, the KDBUS_CMD_CONN_INFO ioctl will return 0 and @offset will
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* tell the user the offset in the connection pool buffer at which to find the
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@@ -632,9 +634,9 @@ struct kdbus_conn_info {
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* struct kdbus_cmd_match - struct to add or remove matches
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* @size: The total size of the struct
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* @owner_id: Privileged users may (de)register matches on behalf
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* of other peers
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* of other peers
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* @cookie: Userspace supplied cookie. When removing, the cookie
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* identifies the match to remove
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* identifies the match to remove
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* @items: A list of items for additional information
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*
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* This structure is used with the KDBUS_CMD_ADD_MATCH and
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@@ -650,78 +652,78 @@ struct kdbus_cmd_match {
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/**
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* enum kdbus_ioctl_type - Ioctl API
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* @KDBUS_CMD_BUS_MAKE: After opening the "control" device node, this
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* command creates a new bus with the specified
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* name. The bus is immediately shut down and
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* cleaned up when the opened "control" device node
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* is closed.
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* command creates a new bus with the specified
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* name. The bus is immediately shut down and
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* cleaned up when the opened "control" device node
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* is closed.
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* @KDBUS_CMD_NS_MAKE: Similar to KDBUS_CMD_BUS_MAKE, but it creates a
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* new kdbus namespace.
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* new kdbus namespace.
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* @KDBUS_CMD_EP_MAKE: Creates a new named special endpoint to talk to
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* the bus. Such endpoints usually carry a more
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* restrictive policy and grant restricted access
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* to specific applications.
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* the bus. Such endpoints usually carry a more
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* restrictive policy and grant restricted access
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* to specific applications.
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* @KDBUS_CMD_HELLO: By opening the bus device node a connection is
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* created. After a HELLO the opened connection
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* becomes an active peer on the bus.
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* created. After a HELLO the opened connection
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* becomes an active peer on the bus.
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* @KDBUS_CMD_BYEBYE: Disconnect a connection. If the connection's
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* message list is empty, the calls succeeds, and
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* the handle is rendered unusable. Otherwise,
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* -EAGAIN is returned without any further side-
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* effects.
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* message list is empty, the calls succeeds, and
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* the handle is rendered unusable. Otherwise,
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* -EAGAIN is returned without any further side-
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* effects.
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* @KDBUS_CMD_MSG_SEND: Send a message and pass data from userspace to
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* the kernel.
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* the kernel.
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* @KDBUS_CMD_MSG_RECV: Receive a message from the kernel which is
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* placed in the receiver's pool.
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* placed in the receiver's pool.
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* @KDBUS_CMD_FREE: Release the allocated memory in the receiver's
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* pool.
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* pool.
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* @KDBUS_CMD_DROP: Drop and free the next queued message and all
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* its ressources without actually receiveing it.
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* its ressources without actually receiveing it.
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* @KDBUS_CMD_SRC: Return the sender's connection ID of the next
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* queued message.
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* queued message.
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* @KDBUS_CMD_NAME_ACQUIRE: Request a well-known bus name to associate with
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* the connection. Well-known names are used to
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* address a peer on the bus.
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* the connection. Well-known names are used to
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* address a peer on the bus.
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* @KDBUS_CMD_NAME_RELEASE: Release a well-known name the connection
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* currently owns.
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* currently owns.
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* @KDBUS_CMD_NAME_LIST: Retrieve the list of all currently registered
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* well-known and unique names.
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* well-known and unique names.
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* @KDBUS_CMD_CONN_INFO: Retrieve credentials and properties of the
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* initial creator of the connection. The data was
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* stored at registration time and does not
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* necessarily represent the connected process or
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* the actual state of the process.
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* initial creator of the connection. The data was
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* stored at registration time and does not
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* necessarily represent the connected process or
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* the actual state of the process.
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* @KDBUS_CMD_MATCH_ADD: Install a match which broadcast messages should
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* be delivered to the connection.
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* be delivered to the connection.
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* @KDBUS_CMD_MATCH_REMOVE: Remove a current match for broadcast messages.
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* @KDBUS_CMD_EP_POLICY_SET: Set the policy of an endpoint. It is used to
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* restrict the access for endpoints created with
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* KDBUS_CMD_EP_MAKE.
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* restrict the access for endpoints created with
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* KDBUS_CMD_EP_MAKE.
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* @KDBUS_CMD_MEMFD_NEW: Return a new file descriptor which provides an
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* anonymous shared memory file and which can be
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* used to pass around larger chunks of data.
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* Kdbus memfd files can be sealed, which allows
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* the receiver to trust the data it has received.
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* Kdbus memfd files expose only very limited
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* operations, they can be mmap()ed, seek()ed,
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* (p)read(v)() and (p)write(v)(); most other
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* common file operations are not implemented.
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* Special caution needs to be taken with
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* read(v)()/write(v)() on a shared file; the
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* underlying file position is always shared
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* between all users of the file and race against
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* each other, pread(v)()/pwrite(v)() avoid these
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* issues.
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* anonymous shared memory file and which can be
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* used to pass around larger chunks of data.
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* Kdbus memfd files can be sealed, which allows
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* the receiver to trust the data it has received.
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* Kdbus memfd files expose only very limited
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* operations, they can be mmap()ed, seek()ed,
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* (p)read(v)() and (p)write(v)(); most other
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* common file operations are not implemented.
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* Special caution needs to be taken with
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* read(v)()/write(v)() on a shared file; the
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* underlying file position is always shared
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* between all users of the file and race against
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* each other, pread(v)()/pwrite(v)() avoid these
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* issues.
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* @KDBUS_CMD_MEMFD_SIZE_GET: Return the size of the underlying file, which
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* changes with write().
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* changes with write().
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* @KDBUS_CMD_MEMFD_SIZE_SET: Truncate the underlying file to the specified
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* size.
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* size.
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* @KDBUS_CMD_MEMFD_SEAL_GET: Return the state of the file sealing.
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* @KDBUS_CMD_MEMFD_SEAL_SET: Seal or break a seal of the file. Only files
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* which are not shared with other processes and
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* which are currently not mapped can be sealed.
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* The current process needs to be the one and
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* single owner of the file, the sealing cannot
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* be changed as long as the file is shared.
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* which are not shared with other processes and
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* which are currently not mapped can be sealed.
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* The current process needs to be the one and
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* single owner of the file, the sealing cannot
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* be changed as long as the file is shared.
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*/
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enum kdbus_ioctl_type {
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KDBUS_CMD_BUS_MAKE = _IOW (KDBUS_IOC_MAGIC, 0x00, struct kdbus_cmd_make),
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@@ -759,64 +761,65 @@ enum kdbus_ioctl_type {
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* errno - api error codes
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* @E2BIG: A message contains too many records or items.
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* @EADDRINUSE: A well-known bus name is already taken by another
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* connection.
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* connection.
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* @EADDRNOTAVAIL: A message flagged not to activate a service, addressed
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* a service which is not currently running.
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* a service which is not currently running.
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* @EAGAIN: No messages are queued at the moment.
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* @EBADF: File descriptors passed with the message are not valid.
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* @EBADFD: A bus connection is in a corrupted state.
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* @EBADMSG: Passed data contains a combination of conflicting or
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* inconsistent types.
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* inconsistent types.
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* @EBUSY: The user tried to say BYEBYE to a connection, but the
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* connection had a non-empty message list.
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* connection had a non-empty message list.
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* @ECONNRESET: A connection is shut down, no further operations are
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* possible.
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* possible.
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* @ECOMM: A peer does not accept the file descriptors addressed
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* to it.
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* to it.
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* @EDESTADDRREQ: The well-known bus name is required but missing.
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* @EDOM: The size of data does not match the expectations. Used
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* for the size of the bloom filter bit field.
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* for the size of the bloom filter bit field.
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* @EEXIST: A requested namespace, bus or endpoint with the same
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* name already exists. A specific data type, which is
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* only expected once, is provided multiple times.
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* name already exists. A specific data type, which is
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* only expected once, is provided multiple times.
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* @EFAULT: The supplied memory could not be accessed, or the data
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* is not properly aligned.
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* is not properly aligned.
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* @EINVAL: The provided data does not match its type or other
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* expectations, like a string which is not NUL terminated,
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* or a string length that points behind the first
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* \0-byte in the string.
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* expectations, like a string which is not NUL terminated,
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* or a string length that points behind the first
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* \0-byte in the string.
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* @EMEDIUMTYPE: A file descriptor which is not a kdbus memfd was
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* refused to send as KDBUS_MSG_PAYLOAD_MEMFD.
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* refused to send as KDBUS_MSG_PAYLOAD_MEMFD.
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* @EMFILE: Too many file descriptors have been supplied with a
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* message.
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* message.
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* @EMLINK: Too many requests from this connection to other peers
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* are queued and waiting for a reply
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* @EMSGSIZE: The supplied data is larger than the allowed maximum
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* size.
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* size.
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* @ENAMETOOLONG: The requested name is larger than the allowed maximum
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* size.
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* size.
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* @ENOBUFS: There is no space left for the submitted data to fit
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* into the receiver's pool.
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* into the receiver's pool.
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* @ENOENT: The name to query information about is currently not on
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* the bus.
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* @ENOMEM: Out of memory.
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* @ENOSYS: The requested functionality is not available.
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* @ENOTCONN: The addressed peer is not an active connection.
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* @ENOTSUPP: The feature negotiation failed, a not supported feature
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* was requested, or an unknown item type was received.
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* was requested, or an unknown item type was received.
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* @ENOTTY: An unknown ioctl command was received.
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* @ENOTUNIQ: A specific data type was addressed to a broadcast
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* address, but only direct addresses support this kind of
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* data.
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* address, but only direct addresses support this kind of
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* data.
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* @ENXIO: A unique address does not exist, or an offset in the
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* receiver's pool does not represent a queued message.
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* receiver's pool does not represent a queued message.
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* @EPERM: The policy prevented an operation. The requested
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* resource is owned by another entity.
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* resource is owned by another entity.
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* @ESHUTDOWN: A namespace or endpoint is currently shutting down;
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* no further operations will be possible.
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* no further operations will be possible.
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* @ESRCH: A requested well-known bus name is not found.
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* @ETXTBSY: A kdbus memfd file cannot be sealed or the seal removed,
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* because it is shared with other processes or still
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* mmap()ed.
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* because it is shared with other processes or still
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* mmap()ed.
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* @EXFULL: The size limits in the pool are reached, no data of
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* the size tried to submit can be queued.
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* the size tried to submit can be queued.
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*/
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#endif
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Block a user