/* * Copyright (C) 2013-2014 Kay Sievers * Copyright (C) 2013-2014 Greg Kroah-Hartman * Copyright (C) 2013-2014 Linux Foundation * Copyright (C) 2013-2014 Lennart Poettering * Copyright (C) 2013-2014 Daniel Mack * * 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_UAPI_H_ #define _KDBUS_UAPI_H_ #ifndef __KERNEL__ #include #include #include #endif #define KDBUS_IOCTL_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-domain 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, KDBUS_ITEM_PAYLOAD_OFF */ struct kdbus_vec { __u64 size; union { __u64 address; __u64 offset; }; }; /** * struct kdbus_bloom_parameter - bus-wide bloom parameters * @size: Size of the bit field in bytes (m / 8) * @n_hash: Number of hash functions used (k) */ struct kdbus_bloom_parameter { __u64 size; __u64 n_hash; }; /** * struct kdbus_bloom_filter - bloom filter containing n elements * @generation: Generation of the element set in the filter * @data: Bit field, multiple of 8 bytes */ struct kdbus_bloom_filter { __u64 generation; __u64 data[0]; }; /** * struct kdbus_memfd - a kdbus memfd * @size: The memfd's size * @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 * @access: Access to grant * @id: For KDBUS_POLICY_ACCESS_USER, the uid * For KDBUS_POLICY_ACCESS_GROUP, the gid */ struct kdbus_policy_access { __u64 type; /* USER, GROUP, WORLD */ __u64 access; /* OWN, TALK, SEE */ __u64 id; /* uid, gid, 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_PARAMETER: Bus-wide bloom parameters, used with * KDBUS_CMD_BUS_MAKE, carries a * struct kdbus_bloom_parameter * @KDBUS_ITEM_BLOOM_FILTER: Bloom filter carried with a message, used to * match against a bloom mask of a connection, * carries a struct kdbus_bloom_filter * @KDBUS_ITEM_BLOOM_MASK: Bloom mask used to match against a message's * bloom filter * @KDBUS_ITEM_DST_NAME: Destination's well-known name * @KDBUS_ITEM_MAKE_NAME: Name of domain, bus, endpoint * @KDBUS_ITEM_MEMFD_NAME: The human readable name of a memfd (debugging) * @KDBUS_ITEM_ATTACH_FLAGS: Attach-flags, used for updating which metadata * a connection subscribes to * @_KDBUS_ITEM_ATTACH_BASE: Start of metadata attach items * @KDBUS_ITEM_NAME: Well-know name with flags * @KDBUS_ITEM_ID: Connection ID * @KDBUS_ITEM_TIMESTAMP: Timestamp * @KDBUS_ITEM_CREDS: Process credential * @KDBUS_ITEM_AUXGROUPS: Auxiliary process groups * @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_POLICY_BASE: Start of policy items * @KDBUS_ITEM_POLICY_ACCESS: Policy access block * @_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_PARAMETER, KDBUS_ITEM_BLOOM_FILTER, KDBUS_ITEM_BLOOM_MASK, KDBUS_ITEM_DST_NAME, KDBUS_ITEM_MAKE_NAME, KDBUS_ITEM_MEMFD_NAME, KDBUS_ITEM_ATTACH_FLAGS, _KDBUS_ITEM_ATTACH_BASE = 0x1000, KDBUS_ITEM_NAME = _KDBUS_ITEM_ATTACH_BASE, KDBUS_ITEM_ID, KDBUS_ITEM_TIMESTAMP, KDBUS_ITEM_CREDS, KDBUS_ITEM_AUXGROUPS, 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_POLICY_BASE = 0x2000, KDBUS_ITEM_POLICY_ACCESS = _KDBUS_ITEM_POLICY_BASE, _KDBUS_ITEM_KERNEL_BASE = 0x8000, 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 * @bloom_parameter: KDBUS_ITEM_BLOOM_PARAMETER * @bloom_filter: KDBUS_ITEM_BLOOM_FILTER * @memfd: KDBUS_ITEM_PAYLOAD_MEMFD * @name_change: KDBUS_ITEM_NAME_ADD * KDBUS_ITEM_NAME_REMOVE * KDBUS_ITEM_NAME_CHANGE * @id_change: KDBUS_ITEM_ID_ADD * KDBUS_ITEM_ID_REMOVE * @policy: 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_bloom_parameter bloom_parameter; struct kdbus_bloom_filter bloom_filter; struct kdbus_memfd memfd; int fds[0]; struct kdbus_notify_name_change name_change; struct kdbus_notify_id_change id_change; struct kdbus_policy_access policy_access; }; }; /** * 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 = 1ULL << 0, KDBUS_MSG_FLAGS_SYNC_REPLY = 1ULL << 1, KDBUS_MSG_FLAGS_NO_AUTO_START = 1ULL << 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_EXPECT_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 = 1ULL << 0, KDBUS_RECV_DROP = 1ULL << 1, KDBUS_RECV_USE_PRIORITY = 1ULL << 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_OWN: Allow to own a well-known name * Implies KDBUS_POLICY_TALK and KDBUS_POLICY_SEE * @KDBUS_POLICY_TALK: Allow communication to a well-known name * Implies KDBUS_POLICY_SEE * @KDBUS_POLICY_SEE: Allow to see a well-known name */ enum kdbus_policy_type { KDBUS_POLICY_SEE = 0, KDBUS_POLICY_TALK, KDBUS_POLICY_OWN, }; /** * 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_POLICY_HOLDER: Special-purpose connection which registers * policy entries for a name. The provided name * is not activated and not registered with the * name database, it only allows unprivileged * connections to aquire a name, talk or discover * a service * @KDBUS_HELLO_MONITOR: Special-purpose connection to monitor * bus traffic */ enum kdbus_hello_flags { KDBUS_HELLO_ACCEPT_FD = 1ULL << 0, KDBUS_HELLO_ACTIVATOR = 1ULL << 1, KDBUS_HELLO_POLICY_HOLDER = 1ULL << 2, KDBUS_HELLO_MONITOR = 1ULL << 3, }; /** * enum kdbus_attach_flags - flags for metadata attachments * @KDBUS_ATTACH_TIMESTAMP: Timestamp * @KDBUS_ATTACH_CREDS: Credentials * @KDBUS_ATTACH_AUXGROUPS: Auxiliary groups * @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 * @_KDBUS_ATTACH_ALL: All of the above */ enum kdbus_attach_flags { KDBUS_ATTACH_TIMESTAMP = 1ULL << 0, KDBUS_ATTACH_CREDS = 1ULL << 1, KDBUS_ATTACH_AUXGROUPS = 1ULL << 2, KDBUS_ATTACH_NAMES = 1ULL << 3, KDBUS_ATTACH_COMM = 1ULL << 4, KDBUS_ATTACH_EXE = 1ULL << 5, KDBUS_ATTACH_CMDLINE = 1ULL << 6, KDBUS_ATTACH_CGROUP = 1ULL << 7, KDBUS_ATTACH_CAPS = 1ULL << 8, KDBUS_ATTACH_SECLABEL = 1ULL << 9, KDBUS_ATTACH_AUDIT = 1ULL << 10, KDBUS_ATTACH_CONN_NAME = 1ULL << 11, _KDBUS_ATTACH_ALL = (1ULL << 12) - 1, }; /** * 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) * @pool_size: Size of the connection's buffer where the received * messages are placed * @bloom: The bloom properties of the bus, specified * by the bus creator (kernel → userspace) * @id128: Unique 128-bit ID of the bus (kernel → userspace) * @items: A list of items * * 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 pool_size; struct kdbus_bloom_parameter bloom; __u8 id128[16]; struct kdbus_item items[0]; } __attribute__((aligned(8))); /** * enum kdbus_make_flags - Flags for KDBUS_CMD_{BUS,EP,NS}_MAKE * @KDBUS_MAKE_ACCESS_GROUP: Make the device node group-accessible * @KDBUS_MAKE_ACCESS_WORLD: Make the device node world-accessible */ enum kdbus_make_flags { KDBUS_MAKE_ACCESS_GROUP = 1ULL << 0, KDBUS_MAKE_ACCESS_WORLD = 1ULL << 1, }; /** * struct kdbus_cmd_make - struct to make a bus, an endpoint or a domain * @size: The total size of the struct * @flags: Properties for the bus/ep/domain to create * @items: Items describing details * * This structure is used with the KDBUS_CMD_BUS_MAKE, KDBUS_CMD_EP_MAKE and * KDBUS_CMD_DOMAIN_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 = 1ULL << 0, KDBUS_NAME_ALLOW_REPLACEMENT = 1ULL << 1, KDBUS_NAME_QUEUE = 1ULL << 2, KDBUS_NAME_IN_QUEUE = 1ULL << 3, KDBUS_NAME_ACTIVATOR = 1ULL << 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. * @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 = 1ULL << 0, KDBUS_NAME_LIST_NAMES = 1ULL << 1, KDBUS_NAME_LIST_ACTIVATORS = 1ULL << 2, KDBUS_NAME_LIST_QUEUED = 1ULL << 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_update - update flags of a connection * @size: The total size of the struct * @items: A list of struct kdbus_item * * This struct is used with the KDBUS_CMD_CONN_UPDATE ioctl. */ struct kdbus_cmd_update { __u64 size; struct kdbus_item items[0]; } __attribute__((aligned(8))); /** * struct kdbus_cmd_match - struct to add or remove matches * @size: The total size of the struct * @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 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_DOMAIN_MAKE: Similar to KDBUS_CMD_BUS_MAKE, but it creates a * new kdbus domain. * @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 there are no * messages queued up in the connection's pool, * the call succeeds, and the handle is rendered * unusable. Otherwise, -EBUSY 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_MSG_CANCEL: Cancel a pending request of a message that * blocks while waiting for a reply. The parameter * denotes the cookie of the message in flight. * @KDBUS_CMD_FREE: Release the allocated memory in the receiver's * pool. * @KDBUS_CMD_NAME_ACQUIRE: Request a well-known bus name to associate with * 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_CONN_UPDATE: Update the properties of a connection. Used to * update the metadata subscription mask and * policy. * @KDBUS_CMD_EP_UPDATE: Update the properties of a custom enpoint. Used * to update the policy. * @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. */ enum kdbus_ioctl_type { KDBUS_CMD_BUS_MAKE = _IOW(KDBUS_IOCTL_MAGIC, 0x00, struct kdbus_cmd_make), KDBUS_CMD_DOMAIN_MAKE = _IOW(KDBUS_IOCTL_MAGIC, 0x10, struct kdbus_cmd_make), KDBUS_CMD_EP_MAKE = _IOW(KDBUS_IOCTL_MAGIC, 0x20, struct kdbus_cmd_make), KDBUS_CMD_HELLO = _IOWR(KDBUS_IOCTL_MAGIC, 0x30, struct kdbus_cmd_hello), KDBUS_CMD_BYEBYE = _IO(KDBUS_IOCTL_MAGIC, 0x31), KDBUS_CMD_MSG_SEND = _IOWR(KDBUS_IOCTL_MAGIC, 0x40, struct kdbus_msg), KDBUS_CMD_MSG_RECV = _IOWR(KDBUS_IOCTL_MAGIC, 0x41, struct kdbus_cmd_recv), KDBUS_CMD_MSG_CANCEL = _IOW(KDBUS_IOCTL_MAGIC, 0x42, __u64 *), KDBUS_CMD_FREE = _IOW(KDBUS_IOCTL_MAGIC, 0x43, __u64 *), KDBUS_CMD_NAME_ACQUIRE = _IOWR(KDBUS_IOCTL_MAGIC, 0x50, struct kdbus_cmd_name), KDBUS_CMD_NAME_RELEASE = _IOW(KDBUS_IOCTL_MAGIC, 0x51, struct kdbus_cmd_name), KDBUS_CMD_NAME_LIST = _IOWR(KDBUS_IOCTL_MAGIC, 0x52, struct kdbus_cmd_name_list), KDBUS_CMD_CONN_INFO = _IOWR(KDBUS_IOCTL_MAGIC, 0x60, struct kdbus_cmd_conn_info), KDBUS_CMD_CONN_UPDATE = _IOW(KDBUS_IOCTL_MAGIC, 0x61, struct kdbus_cmd_update), KDBUS_CMD_EP_UPDATE = _IOW(KDBUS_IOCTL_MAGIC, 0x71, struct kdbus_cmd_update), KDBUS_CMD_MATCH_ADD = _IOW(KDBUS_IOCTL_MAGIC, 0x80, struct kdbus_cmd_match), KDBUS_CMD_MATCH_REMOVE = _IOW(KDBUS_IOCTL_MAGIC, 0x81, struct kdbus_cmd_match), }; #endif /* _KDBUS_UAPI_H_ */