+++ /dev/null
-/*
- * 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.
- *
- * "Everything should be made as simple as possible, but not simpler."
- * -- Albert Einstein
- */
-
-#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
- * @seqnum: Global per-namespace message sequence number
- * @monotonic_ns: Monotonic timestamp, in nanoseconds
- * @realtime_ns: Realtime timestamp, in nanoseconds
- *
- * Attached to:
- * KDBUS_ITEM_TIMESTAMP
- */
-struct kdbus_timestamp {
- __u64 seqnum;
- __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 ensure proper alignement and size
- *
- * 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_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_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_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_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_MEMFD_NAME,
-
- _KDBUS_ITEM_POLICY_BASE = 0x1000,
- KDBUS_ITEM_POLICY_NAME = _KDBUS_ITEM_POLICY_BASE,
- KDBUS_ITEM_POLICY_ACCESS,
-
- _KDBUS_ITEM_ATTACH_BASE = 0x2000,
- 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_CONN_NAME,
-
- _KDBUS_ITEM_KERNEL_BASE = 0x3000,
- 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_SYNC_REPLY: Wait for destination connection to
- * reply to this message. The
- * KDBUS_CMD_MSG_SEND ioctl() will block
- * until the reply is received, and
- * offset_reply in struct kdbus_msg will
- * yield the offset in the sender's pool
- * where the reply can be found.
- * This flag is only valid if
- * @KDBUS_MSG_FLAGS_EXPECT_REPLY is set as
- * well.
- * @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_SYNC_REPLY = 1 << 1,
- KDBUS_MSG_FLAGS_NO_AUTO_START = 1 << 2,
-};
-
-/**
- * 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_*)
- * @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
- * @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
- * @offset_reply: If KDBUS_MSG_FLAGS_WAIT_FOR_REPLY, this field will
- * contain the offset in the sender's pool where the
- * reply is stored.
- * @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 timeout_ns;
- __u64 cookie_reply;
- __u64 offset_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,
-};
-
-/**
- * struct 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_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
- * @KDBUS_ATTACH_CONN_NAME: The human-readable connection name
- */
-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,
- KDBUS_ATTACH_CONN_NAME = 1 << 10,
-};
-
-/**
- * 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.
- */
-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)));
-
-/**
- * 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
- * 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_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 = _IOWR(KDBUS_IOC_MAGIC, 0x41, struct kdbus_cmd_recv),
- 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_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 = _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),
-};
-
-/*
- * 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.
- * @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.
- * @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
~ianmdlvl / elogind.git / blobdiff