[PATCH 1/3] gdbus: Import kdbus interface header



kdbus.h taken from https://code.google.com/p/d-bus/, commit 547501fbe005.

---
 gio/kdbus.h | 824 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 824 insertions(+)
 create mode 100644 gio/kdbus.h

diff --git a/gio/kdbus.h b/gio/kdbus.h
new file mode 100644
index 0000000..fbba085
--- /dev/null
+++ b/gio/kdbus.h
@@ -0,0 +1,824 @@
+/*
+ * Copyright (C) 2013 Kay Sievers
+ * Copyright (C) 2013 Greg Kroah-Hartman <gregkh linuxfoundation org>
+ * Copyright (C) 2013 Linux Foundation
+ * Copyright (C) 2013 Lennart Poettering
+ * Copyright (C) 2013 Daniel Mack <daniel zonque org>
+ *
+ * kdbus is free software; you can redistribute it and/or modify it under
+ * the terms of the GNU Lesser General Public License as published by the
+ * Free Software Foundation; either version 2.1 of the License, or (at
+ * your option) any later version.
+ */
+
+#ifndef _KDBUS_H_
+#define _KDBUS_H_
+
+#ifndef __KERNEL__
+#include <sys/ioctl.h>
+#include <sys/types.h>
+#include <linux/types.h>
+#endif
+
+#define KDBUS_IOC_MAGIC                        0x95
+#define KDBUS_SRC_ID_KERNEL            (0)
+#define KDBUS_DST_ID_NAME              (0)
+#define KDBUS_MATCH_ID_ANY             (~0ULL)
+#define KDBUS_DST_ID_BROADCAST         (~0ULL)
+
+/**
+ * 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_ID_ADD
+ *   KDBUS_ITEM_ID_REMOVE
+ */
+struct kdbus_notify_id_change {
+       __u64 id;
+       __u64 flags;
+};
+
+/**
+ * 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_NAME_ADD
+ *   KDBUS_ITEM_NAME_REMOVE
+ *   KDBUS_ITEM_NAME_CHANGE
+ */
+struct kdbus_notify_name_change {
+       struct kdbus_notify_id_change old;
+       struct kdbus_notify_id_change new;
+       char name[0];
+};
+
+/**
+ * struct kdbus_creds - process credentials
+ * @uid:               User ID
+ * @gid:               Group ID
+ * @pid:               Process ID
+ * @tid:               Thread ID
+ * @starttime:         Starttime of the process
+ *
+ * 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.
+ *
+ * Attached to:
+ *   KDBUS_ITEM_CREDS
+ */
+struct kdbus_creds {
+       __u64 uid;
+       __u64 gid;
+       __u64 pid;
+       __u64 tid;
+       __u64 starttime;
+};
+
+/**
+ * struct kdbus_audit - audit information
+ * @sessionid:         The audit session ID
+ * @loginuid:          The audit login uid
+ *
+ * Attached to:
+ *   KDBUS_ITEM_AUDIT
+ */
+struct kdbus_audit {
+       __u64 sessionid;
+       __u64 loginuid;
+};
+
+/**
+ * struct kdbus_timestamp
+ * @monotonic_ns:      Monotonic timestamp, in nanoseconds
+ * @realtime_ns:       Realtime timestamp, in nanoseconds
+ *
+ * Attached to:
+ *   KDBUS_ITEM_TIMESTAMP
+ */
+struct kdbus_timestamp {
+       __u64 monotonic_ns;
+       __u64 realtime_ns;
+};
+
+/**
+ * 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,
+ *                     relative to the message head
+ *
+ * Attached to:
+ *   KDBUS_ITEM_PAYLOAD_VEC
+ */
+struct kdbus_vec {
+       __u64 size;
+       union {
+               __u64 address;
+               __u64 offset;
+       };
+};
+
+/**
+ * struct kdbus_memfd - a kdbus memfd
+ * @size:              The memfd's size
+ * @fd:                        The file descriptor number
+ * @__pad:             Padding to make the struct aligned
+ *
+ * Attached to:
+ *   KDBUS_ITEM_PAYLOAD_MEMFD
+ */
+struct kdbus_memfd {
+       __u64 size;
+       int fd;
+       __u32 __pad;
+};
+
+/**
+ * struct kdbus_name - a registered well-known name with its flags
+ * @flags:             flags from KDBUS_NAME_*
+ * @name:              well-known name
+ *
+ * Attached to:
+ *   KDBUS_ITEM_NAME
+ */
+struct kdbus_name {
+       __u64 flags;
+       char name[0];
+};
+
+/**
+ * struct kdbus_policy_access - policy access item
+ * @type:              One of KDBUS_POLICY_ACCESS_* types
+ * @bits:              Access to grant. One of KDBUS_POLICY_*
+ * @id:                        For KDBUS_POLICY_ACCESS_USER, the uid
+ *                     For KDBUS_POLICY_ACCESS_GROUP, the gid
+ *
+ * Embedded in:
+ *   struct kdbus_policy
+ */
+struct kdbus_policy_access {
+       __u64 type;     /* USER, GROUP, WORLD */
+       __u64 bits;     /* RECV, SEND, OWN */
+       __u64 id;       /* uid, gid, 0 */
+};
+
+/**
+ * struct kdbus_policy - a policy item
+ * @access:            Policy access details
+ * @name:              Well-known name to grant access to
+ *
+ * Attached to:
+ *   KDBUS_POLICY_ACCESS
+ *   KDBUS_ITEM_POLICY_NAME
+ */
+struct kdbus_policy {
+       union {
+               struct kdbus_policy_access access;
+               char name[0];
+       };
+};
+
+/**
+ * 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_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_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_MAKE_NAME:      Name of namespace, bus, endpoint
+ * @_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_BASE:   Start of metadata attach items
+ * @KDBUS_ITEM_NAME:           Well-know name with flags
+ * @KDBUS_ITEM_ID:             Connection ID
+ * @KDBUS_ITEM_TIMESTAMP:      Timestamp
+ * @KDBUS_ITEM_CREDS:          Process credential
+ * @KDBUS_ITEM_PID_COMM:       Process ID "comm" identifier
+ * @KDBUS_ITEM_TID_COMM:       Thread ID "comm" identifier
+ * @KDBUS_ITEM_EXE:            The path of the executable
+ * @KDBUS_ITEM_CMDLINE:                The process command line
+ * @KDBUS_ITEM_CGROUP:         The croup membership
+ * @KDBUS_ITEM_CAPS:           The process capabilities
+ * @KDBUS_ITEM_SECLABEL:       The security label
+ * @KDBUS_ITEM_AUDIT:          The audit IDs
+ * @_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_NAME_CHANGE:    Notify in struct kdbus_notify_name_change
+ * @KDBUS_ITEM_ID_ADD:         Notify in struct kdbus_notify_id_change
+ * @KDBUS_ITEM_ID_REMOVE:      Notify in struct kdbus_notify_id_change
+ * @KDBUS_ITEM_REPLY_TIMEOUT:  Timeout has been reached
+ * @KDBUS_ITEM_REPLY_DEAD:     Destination died
+ */
+enum kdbus_item_type {
+       _KDBUS_ITEM_NULL,
+       _KDBUS_ITEM_USER_BASE,
+       KDBUS_ITEM_PAYLOAD_VEC  = _KDBUS_ITEM_USER_BASE,
+       KDBUS_ITEM_PAYLOAD_OFF,
+       KDBUS_ITEM_PAYLOAD_MEMFD,
+       KDBUS_ITEM_FDS,
+       KDBUS_ITEM_BLOOM,
+       KDBUS_ITEM_BLOOM_SIZE,
+       KDBUS_ITEM_DST_NAME,
+       KDBUS_ITEM_MAKE_NAME,
+
+       _KDBUS_ITEM_POLICY_BASE = 0x400,
+       KDBUS_ITEM_POLICY_NAME = _KDBUS_ITEM_POLICY_BASE,
+       KDBUS_ITEM_POLICY_ACCESS,
+
+       _KDBUS_ITEM_ATTACH_BASE = 0x600,
+       KDBUS_ITEM_NAME         = _KDBUS_ITEM_ATTACH_BASE,
+       KDBUS_ITEM_ID,
+       KDBUS_ITEM_TIMESTAMP,
+       KDBUS_ITEM_CREDS,
+       KDBUS_ITEM_PID_COMM,
+       KDBUS_ITEM_TID_COMM,
+       KDBUS_ITEM_EXE,
+       KDBUS_ITEM_CMDLINE,
+       KDBUS_ITEM_CGROUP,
+       KDBUS_ITEM_CAPS,
+       KDBUS_ITEM_SECLABEL,
+       KDBUS_ITEM_AUDIT,
+
+       _KDBUS_ITEM_KERNEL_BASE = 0x800,
+       KDBUS_ITEM_NAME_ADD     = _KDBUS_ITEM_KERNEL_BASE,
+       KDBUS_ITEM_NAME_REMOVE,
+       KDBUS_ITEM_NAME_CHANGE,
+       KDBUS_ITEM_ID_ADD,
+       KDBUS_ITEM_ID_REMOVE,
+       KDBUS_ITEM_REPLY_TIMEOUT,
+       KDBUS_ITEM_REPLY_DEAD,
+};
+
+/**
+ * struct kdbus_item - chain of data blocks
+ * @size:              Overall data record size
+ * @type:              Kdbus_item type of data
+ * @data:              Generic bytes
+ * @data32:            Generic 32 bit array
+ * @data64:            Generic 64 bit array
+ * @str:               Generic string
+ * @id:                        Connection ID
+ * @vec:               KDBUS_ITEM_PAYLOAD_VEC
+ * @creds:             KDBUS_ITEM_CREDS
+ * @audit:             KDBUS_ITEM_AUDIT
+ * @timestamp:         KDBUS_ITEM_TIMESTAMP
+ * @name:              KDBUS_ITEM_NAME
+ * @memfd:             KDBUS_ITEM_PAYLOAD_MEMFD
+ * @name_change:       KDBUS_ITEM_NAME_ADD
+ *                     KDBUS_ITEM_NAME_REMOVE
+ *                     KDBUS_ITEM_NAME_CHANGE
+ * @id_change:         KDBUS_ITEM_ID_ADD
+ *                     KDBUS_ITEM_ID_REMOVE
+ * @policy:            KDBUS_ITEM_POLICY_NAME
+ *                     KDBUS_ITEM_POLICY_ACCESS
+ */
+struct kdbus_item {
+       __u64 size;
+       __u64 type;
+       union {
+               __u8 data[0];
+               __u32 data32[0];
+               __u64 data64[0];
+               char str[0];
+
+               __u64 id;
+               struct kdbus_vec vec;
+               struct kdbus_creds creds;
+               struct kdbus_audit audit;
+               struct kdbus_timestamp timestamp;
+               struct kdbus_name name;
+               struct kdbus_memfd memfd;
+               int fds[0];
+               struct kdbus_notify_name_change name_change;
+               struct kdbus_notify_id_change id_change;
+               struct kdbus_policy policy;
+       };
+};
+
+/**
+ * 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_NO_AUTO_START:     Do not start a service, if the addressed
+ *                                     name is not currently active
+ */
+enum kdbus_msg_flags {
+       KDBUS_MSG_FLAGS_EXPECT_REPLY    = 1 << 0,
+       KDBUS_MSG_FLAGS_NO_AUTO_START   = 1 << 1,
+};
+
+/**
+ * enum kdbus_payload_type - type of payload carried by message
+ * @KDBUS_PAYLOAD_KERNEL:      Kernel-generated simple message
+ * @KDBUS_PAYLOAD_DBUS:                D-Bus marshalling "DBusDBus"
+ */
+enum kdbus_payload_type {
+       KDBUS_PAYLOAD_KERNEL,
+       KDBUS_PAYLOAD_DBUS      = 0x4442757344427573ULL,
+};
+
+/**
+ * struct kdbus_msg - the representation of a kdbus message
+ * @size:              Total size of the message
+ * @flags:             Message flags (KDBUS_MSG_FLAGS_*)
+ * @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.
+ * @items:             A list of kdbus_items containing the message payload
+ */
+struct kdbus_msg {
+       __u64 size;
+       __u64 flags;
+       __u64 dst_id;
+       __u64 src_id;
+       __u64 payload_type;
+       __u64 cookie;
+       union {
+               __u64 cookie_reply;
+               __u64 timeout_ns;
+       };
+       struct kdbus_item items[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_RECV:         Allow receive
+ * @KDBUS_POLICY_SEND:         Allow send
+ * @KDBUS_POLICY_OWN:          Allow to own a well-known name
+ */
+enum kdbus_policy_type {
+       KDBUS_POLICY_RECV               = 1 <<  2,
+       KDBUS_POLICY_SEND               = 1 <<  1,
+       KDBUS_POLICY_OWN                = 1 <<  0,
+};
+
+/**
+ * struct kdbus_cmd_policy - a series of policies to upload
+ * @size:              The total size of the structure
+ * @policies:          The policies to upload
+ *
+ * A KDBUS_POLICY_NAME must always preceeds a KDBUS_POLICY_ACCESS entry.
+ * A new KDBUS_POLICY_NAME can be added after KDBUS_POLICY_ACCESS for
+ * chaining multiple policies together.
+ */
+struct kdbus_cmd_policy {
+       __u64 size;
+       struct kdbus_item policies[0];
+} __attribute__((aligned(8)));
+
+/**
+ * enum kdbus_hello_flags - flags for struct kdbus_cmd_hello
+ * @KDBUS_HELLO_ACCEPT_FD:     The connection allows the receiving of
+ *                             any passed file descriptors
+ * @KDBUS_HELLO_ACTIVATOR:     Special-purpose connection which registers
+ *                             a well-know name for a process to be started
+ *                             when traffic arrives
+ * @KDBUS_HELLO_MONITOR:       Special-purpose connection to monitor
+ *                             bus traffic
+ */
+enum kdbus_hello_flags {
+       KDBUS_HELLO_ACCEPT_FD           =  1 <<  0,
+       KDBUS_HELLO_ACTIVATOR           =  1 <<  1,
+       KDBUS_HELLO_MONITOR             =  1 <<  2,
+};
+
+/**
+ * enum kdbus_attach_flags - flags for metadata attachments
+ * @KDBUS_ATTACH_TIMESTAMP:    Timestamp
+ * @KDBUS_ATTACH_CREDS:                Credentials
+ * @KDBUS_ATTACH_NAMES:                Well-known names
+ * @KDBUS_ATTACH_COMM:         The "comm" process identifier
+ * @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
+ */
+enum kdbus_attach_flags {
+       KDBUS_ATTACH_TIMESTAMP          =  1 <<  0,
+       KDBUS_ATTACH_CREDS              =  1 <<  1,
+       KDBUS_ATTACH_NAMES              =  1 <<  2,
+       KDBUS_ATTACH_COMM               =  1 <<  3,
+       KDBUS_ATTACH_EXE                =  1 <<  4,
+       KDBUS_ATTACH_CMDLINE            =  1 <<  5,
+       KDBUS_ATTACH_CGROUP             =  1 <<  6,
+       KDBUS_ATTACH_CAPS               =  1 <<  7,
+       KDBUS_ATTACH_SECLABEL           =  1 <<  8,
+       KDBUS_ATTACH_AUDIT              =  1 <<  9,
+};
+
+/**
+ * struct kdbus_cmd_hello - struct to say hello to kdbus
+ * @size:              The total size of the structure
+ * @conn_flags:                Connection flags (KDBUS_HELLO_*). The kernel will
+ *                     return its capabilities in that field.
+ * @attach_flags:      Mask of metadata to attach to each message sent
+ *                     (KDBUS_ATTACH_*)
+ * @bus_flags:         The flags field copied verbatim from the original
+ *                     KDBUS_CMD_BUS_MAKE ioctl. It's intended to be useful
+ *                     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
+ * @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.
+ */
+struct kdbus_cmd_hello {
+       __u64 size;
+       __u64 conn_flags;
+       __u64 attach_flags;
+       __u64 bus_flags;
+       __u64 id;
+       __u64 bloom_size;
+       __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 {
+       KDBUS_MAKE_ACCESS_GROUP         = 1 <<  0,
+       KDBUS_MAKE_ACCESS_WORLD         = 1 <<  1,
+       KDBUS_MAKE_POLICY_OPEN          = 1 <<  2,
+};
+
+/**
+ * struct kdbus_cmd_make - struct to make a bus, an endpoint or a namespace
+ * @size:              The total size of the struct
+ * @flags:             Properties for the bus/ep/ns to create
+ * @items:             Items describing details
+ *
+ * This structure is used with the KDBUS_CMD_BUS_MAKE, KDBUS_CMD_EP_MAKE and
+ * KDBUS_CMD_NS_MAKE ioctls.
+ */
+struct kdbus_cmd_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_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     = 1 <<  0,
+       KDBUS_NAME_ALLOW_REPLACEMENT    = 1 <<  1,
+       KDBUS_NAME_QUEUE                = 1 <<  2,
+       KDBUS_NAME_IN_QUEUE             = 1 <<  3,
+       KDBUS_NAME_ACTIVATOR            = 1 <<  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_*)
+ * @owner_id:          The current owner of the name. For requests,
+ *                     privileged users may set this field to
+ *                     (de)register names on behalf of other connections.
+ * @conn_flags:                The flags of the owning connection (KDBUS_HELLO_*)
+ * @name:              The well-known name
+ *
+ * This structure is used with the KDBUS_CMD_NAME_ACQUIRE ioctl.
+ */
+struct kdbus_cmd_name {
+       __u64 size;
+       __u64 flags;
+       __u64 owner_id;
+       __u64 conn_flags;
+       char name[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          = 1 <<  0,
+       KDBUS_NAME_LIST_NAMES           = 1 <<  1,
+       KDBUS_NAME_LIST_ACTIVATORS      = 1 <<  2,
+       KDBUS_NAME_LIST_QUEUED          = 1 <<  3,
+};
+
+/**
+ * struct kdbus_cmd_name_list - request a list of name entries
+ * @flags:             Flags for the query (KDBUS_NAME_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
+ * @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_cmd_name names[0];
+};
+
+/**
+ * struct kdbus_cmd_conn_info - struct used for KDBUS_CMD_CONN_INFO ioctl
+ * @size:              The total size of the struct
+ * @flags:             KDBUS_ATTACH_* flags
+ * @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_conn_info struct result is stored. The user must
+ *                     use KDBUS_CMD_FREE to free the allocated memory.
+ * @name:              The optional well-known name to look up. Only needed in
+ *                     case @id is zero.
+ *
+ * On success, the KDBUS_CMD_CONN_INFO ioctl will return 0 and @offset will
+ * tell the user the offset in the connection pool buffer at which to find the
+ * result in a struct kdbus_conn_info.
+ */
+struct kdbus_cmd_conn_info {
+       __u64 size;
+       __u64 flags;
+       __u64 id;
+       __u64 offset;
+       char name[0];
+} __attribute__((aligned(8)));
+
+/**
+ * struct kdbus_conn_info - information returned by KDBUS_CMD_CONN_INFO
+ * @size:              The total size of the struct
+ * @id:                        The connection's 64-bit ID
+ * @flags:             The connection's 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_conn_info {
+       __u64 size;
+       __u64 id;
+       __u64 flags;
+       struct kdbus_item items[0];
+};
+
+/**
+ * struct kdbus_cmd_match - struct to add or remove matches
+ * @size:              The total size of the struct
+ * @owner_id:          Privileged users may (de)register matches on behalf
+ *                     of other peers
+ * @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_ADD_MATCH and
+ * KDBUS_CMD_REMOVE_MATCH ioctl.
+ */
+struct kdbus_cmd_match {
+       __u64 size;
+       __u64 owner_id;
+       __u64 cookie;
+       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
+ *                             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.
+ * @KDBUS_CMD_NS_MAKE:         Similar to KDBUS_CMD_BUS_MAKE, but it creates a
+ *                             new kdbus namespace.
+ * @KDBUS_CMD_EP_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
+ *                             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.
+ * @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_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_EP_POLICY_SET:   Set the policy of an endpoint. It is used to
+ *                             restrict the access for endpoints created with
+ *                             KDBUS_CMD_EP_MAKE.
+ * @KDBUS_CMD_MEMFD_NEW:       Return a new file descriptor which provides an
+ *                             anonymous shared memory file and which can be
+ *                             used to pass around larger chunks of data.
+ *                             Kdbus memfd files can be sealed, which allows
+ *                             the receiver to trust the data it has received.
+ *                             Kdbus memfd files expose only very limited
+ *                             operations, they can be mmap()ed, seek()ed,
+ *                             (p)read(v)() and (p)write(v)(); most other
+ *                             common file operations are not implemented.
+ *                             Special caution needs to be taken with
+ *                             read(v)()/write(v)() on a shared file; the
+ *                             underlying file position is always shared
+ *                             between all users of the file and race against
+ *                             each other, pread(v)()/pwrite(v)() avoid these
+ *                             issues.
+ * @KDBUS_CMD_MEMFD_SIZE_GET:  Return the size of the underlying file, which
+ *                             changes with write().
+ * @KDBUS_CMD_MEMFD_SIZE_SET:  Truncate the underlying file to the specified
+ *                             size.
+ * @KDBUS_CMD_MEMFD_SEAL_GET:  Return the state of the file sealing.
+ * @KDBUS_CMD_MEMFD_SEAL_SET:  Seal or break a seal of the file. Only files
+ *                             which are not shared with other processes and
+ *                             which are currently not mapped can be sealed.
+ *                             The current process needs to be the one and
+ *                             single owner of the file, the sealing cannot
+ *                             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_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_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),
+       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_MATCH_ADD =           _IOW (KDBUS_IOC_MAGIC, 0x70, struct kdbus_cmd_match),
+       KDBUS_CMD_MATCH_REMOVE =        _IOW (KDBUS_IOC_MAGIC, 0x71, struct kdbus_cmd_match),
+
+       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),
+};
+
+/*
+ * errno - api error codes
+ * @E2BIG:             A message contains too many records or items.
+ * @EADDRINUSE:                A well-known bus name is already taken by another
+ *                     connection.
+ * @EADDRNOTAVAIL:     A message flagged not to activate a service, addressed
+ *                     a service which is not currently running.
+ * @EAGAIN:            No messages are queued at the moment.
+ * @EBADF:             File descriptors passed with the message are not valid.
+ * @EBADFD:            A bus connection is in a corrupted state.
+ * @EBADMSG:           Passed data contains a combination of conflicting or
+ *                     inconsistent types.
+ * @EBUSY:             The user tried to say BYEBYE to a connection, but the
+ *                     connection had a non-empty message list.
+ * @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.
+ * @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.
+ * @EFAULT:            The supplied memory could not be accessed, or the data
+ *                     is not properly aligned.
+ * @EINVAL:            The provided data does not match its type or other
+ *                     expectations, like a string which is not NUL terminated,
+ *                     or a string length that points behind the first
+ *                     \0-byte in the string.
+ * @EMEDIUMTYPE:       A file descriptor which is not a kdbus memfd was
+ *                     refused to send as KDBUS_MSG_PAYLOAD_MEMFD.
+ * @EMFILE:            Too many file descriptors have been supplied with a
+ *                     message.
+ * @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
+ *                     size.
+ * @ENAMETOOLONG:      The requested name is larger than the allowed maximum
+ *                     size.
+ * @ENOBUFS:           There is no space left for the submitted data to fit
+ *                     into the receiver's pool.
+ * @ENOENT:            The name to query information about is currently not on
+ *                     the bus.
+ * @ENOMEM:            Out of memory.
+ * @ENOSYS:            The requested functionality is not available.
+ * @ENOTCONN:          The addressed peer is not an active connection.
+ * @ENOTSUPP:          The feature negotiation failed, a not supported feature
+ *                     was requested, or an unknown item type was received.
+ * @ENOTTY:            An unknown ioctl command was received.
+ * @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, 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;
+ *                     no further operations will be possible.
+ * @ESRCH:             A requested well-known bus name is not found.
+ * @ETXTBSY:           A kdbus memfd file cannot be sealed or the seal removed,
+ *                     because it is shared with other processes or still
+ *                     mmap()ed.
+ * @EXFULL:            The size limits in the pool are reached, no data of
+ *                     the size tried to submit can be queued.
+ */
+#endif
-- 
1.8.3.2



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