diff options
Diffstat (limited to 'src/libsystemd/sd-bus/kdbus.h')
| -rw-r--r-- | src/libsystemd/sd-bus/kdbus.h | 526 |
1 files changed, 225 insertions, 301 deletions
diff --git a/src/libsystemd/sd-bus/kdbus.h b/src/libsystemd/sd-bus/kdbus.h index c238d79d58..1cc475eb1d 100644 --- a/src/libsystemd/sd-bus/kdbus.h +++ b/src/libsystemd/sd-bus/kdbus.h @@ -16,7 +16,7 @@ #define KDBUS_DST_ID_NAME (0) #define KDBUS_MATCH_ID_ANY (~0ULL) #define KDBUS_DST_ID_BROADCAST (~0ULL) -#define KDBUS_FLAG_KERNEL (1ULL << 63) +#define KDBUS_FLAG_NEGOTIATE (1ULL << 63) /** * struct kdbus_notify_id_change - name registry change message @@ -33,7 +33,7 @@ struct kdbus_notify_id_change { __u64 id; __u64 flags; -}; +} __attribute__((__aligned__(8))); /** * struct kdbus_notify_name_change - name registry change message @@ -53,7 +53,7 @@ struct kdbus_notify_name_change { struct kdbus_notify_id_change old_id; struct kdbus_notify_id_change new_id; char name[0]; -}; +} __attribute__((__aligned__(8))); /** * struct kdbus_creds - process credentials @@ -78,7 +78,7 @@ struct kdbus_creds { __u32 egid; __u32 sgid; __u32 fsgid; -}; +} __attribute__((__aligned__(8))); /** * struct kdbus_pids - process identifiers @@ -95,7 +95,7 @@ struct kdbus_pids { __u64 pid; __u64 tid; __u64 ppid; -}; +} __attribute__((__aligned__(8))); /** * struct kdbus_caps - process capabilities @@ -110,7 +110,7 @@ struct kdbus_pids { struct kdbus_caps { __u32 last_cap; __u32 caps[0]; -}; +} __attribute__((__aligned__(8))); /** * struct kdbus_audit - audit information @@ -123,7 +123,7 @@ struct kdbus_caps { struct kdbus_audit { __u32 sessionid; __u32 loginuid; -}; +} __attribute__((__aligned__(8))); /** * struct kdbus_timestamp @@ -138,7 +138,7 @@ struct kdbus_timestamp { __u64 seqnum; __u64 monotonic_ns; __u64 realtime_ns; -}; +} __attribute__((__aligned__(8))); /** * struct kdbus_vec - I/O vector for kdbus payload items @@ -156,7 +156,7 @@ struct kdbus_vec { __u64 address; __u64 offset; }; -}; +} __attribute__((__aligned__(8))); /** * struct kdbus_bloom_parameter - bus-wide bloom parameters @@ -166,7 +166,7 @@ struct kdbus_vec { struct kdbus_bloom_parameter { __u64 size; __u64 n_hash; -}; +} __attribute__((__aligned__(8))); /** * struct kdbus_bloom_filter - bloom filter containing n elements @@ -176,7 +176,7 @@ struct kdbus_bloom_parameter { struct kdbus_bloom_filter { __u64 generation; __u64 data[0]; -}; +} __attribute__((__aligned__(8))); /** * struct kdbus_memfd - a kdbus memfd @@ -193,7 +193,7 @@ struct kdbus_memfd { __u64 size; int fd; __u32 __pad; -}; +} __attribute__((__aligned__(8))); /** * struct kdbus_name - a registered well-known name with its flags @@ -206,6 +206,34 @@ struct kdbus_memfd { struct kdbus_name { __u64 flags; char name[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_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, }; /** @@ -219,12 +247,52 @@ struct kdbus_policy_access { __u64 type; /* USER, GROUP, WORLD */ __u64 access; /* OWN, TALK, SEE */ __u64 id; /* uid, gid, 0 */ +} __attribute__((__aligned__(8))); + +/** + * enum kdbus_attach_flags - flags for metadata attachments + * @KDBUS_ATTACH_TIMESTAMP: Timestamp + * @KDBUS_ATTACH_CREDS: Credentials + * @KDBUS_ATTACH_PIDS: PIDs + * @KDBUS_ATTACH_AUXGROUPS: Auxiliary groups + * @KDBUS_ATTACH_NAMES: Well-known names + * @KDBUS_ATTACH_TID_COMM: The "comm" process identifier of the TID + * @KDBUS_ATTACH_PID_COMM: The "comm" process identifier of the PID + * @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_DESCRIPTION: The human-readable connection name + * @_KDBUS_ATTACH_ALL: All of the above + * @_KDBUS_ATTACH_ANY: Wildcard match to enable any kind of + * metatdata. + */ +enum kdbus_attach_flags { + KDBUS_ATTACH_TIMESTAMP = 1ULL << 0, + KDBUS_ATTACH_CREDS = 1ULL << 1, + KDBUS_ATTACH_PIDS = 1ULL << 2, + KDBUS_ATTACH_AUXGROUPS = 1ULL << 3, + KDBUS_ATTACH_NAMES = 1ULL << 4, + KDBUS_ATTACH_TID_COMM = 1ULL << 5, + KDBUS_ATTACH_PID_COMM = 1ULL << 6, + KDBUS_ATTACH_EXE = 1ULL << 7, + KDBUS_ATTACH_CMDLINE = 1ULL << 8, + KDBUS_ATTACH_CGROUP = 1ULL << 9, + KDBUS_ATTACH_CAPS = 1ULL << 10, + KDBUS_ATTACH_SECLABEL = 1ULL << 11, + KDBUS_ATTACH_AUDIT = 1ULL << 12, + KDBUS_ATTACH_CONN_DESCRIPTION = 1ULL << 13, + _KDBUS_ATTACH_ALL = (1ULL << 14) - 1, + _KDBUS_ATTACH_ANY = ~0ULL }; /** * 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_NEGOTIATE: Negotiate supported 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 @@ -291,7 +359,8 @@ struct kdbus_policy_access { enum kdbus_item_type { _KDBUS_ITEM_NULL, _KDBUS_ITEM_USER_BASE, - KDBUS_ITEM_PAYLOAD_VEC = _KDBUS_ITEM_USER_BASE, + KDBUS_ITEM_NEGOTIATE = _KDBUS_ITEM_USER_BASE, + KDBUS_ITEM_PAYLOAD_VEC, KDBUS_ITEM_PAYLOAD_OFF, KDBUS_ITEM_PAYLOAD_MEMFD, KDBUS_ITEM_FDS, @@ -385,7 +454,7 @@ struct kdbus_item { struct kdbus_notify_id_change id_change; struct kdbus_policy_access policy_access; }; -}; +} __attribute__((__aligned__(8))); /** * struct kdbus_item_list - A list of items @@ -395,7 +464,7 @@ struct kdbus_item { struct kdbus_item_list { __u64 size; struct kdbus_item items[0]; -}; +} __attribute__((__aligned__(8))); /** * enum kdbus_msg_flags - type of message @@ -460,7 +529,7 @@ struct kdbus_msg { __u64 cookie_reply; }; struct kdbus_item items[0]; -} __attribute__((aligned(8))); +} __attribute__((__aligned__(8))); /** * struct kdbus_msg_info - returned message container @@ -472,7 +541,7 @@ struct kdbus_msg_info { __u64 offset; __u64 msg_size; __u64 return_flags; -}; +} __attribute__((__aligned__(8))); /** * enum kdbus_send_flags - flags for sending messages @@ -494,8 +563,6 @@ enum kdbus_send_flags { * struct kdbus_cmd_send - send message * @size: Overall size of this structure * @flags: Flags to change send behavior (KDBUS_SEND_*) - * @kernel_flags: Supported send flags, kernel → userspace - * @kernel_msg_flags: Supported message flags, kernel → userspace * @return_flags: Command return flags, kernel → userspace * @msg_address: Storage address of the kdbus_msg to send * @reply: Storage for message reply if KDBUS_SEND_SYNC_REPLY @@ -505,13 +572,11 @@ enum kdbus_send_flags { struct kdbus_cmd_send { __u64 size; __u64 flags; - __u64 kernel_flags; - __u64 kernel_msg_flags; __u64 return_flags; __u64 msg_address; struct kdbus_msg_info reply; struct kdbus_item items[0]; -} __attribute__((aligned(8))); +} __attribute__((__aligned__(8))); /** * enum kdbus_recv_flags - flags for de-queuing messages @@ -546,7 +611,6 @@ enum kdbus_recv_return_flags { * struct kdbus_cmd_recv - struct to de-queue a buffered message * @size: Overall size of this object * @flags: KDBUS_RECV_* flags, userspace → kernel - * @kernel_flags: Supported KDBUS_RECV_* flags, kernel → userspace * @return_flags: Command return flags, kernel → userspace * @priority: Minimum priority of the messages to de-queue. Lowest * values have the highest priority. @@ -554,7 +618,7 @@ enum kdbus_recv_return_flags { * -EOVERFLOW, this field will contain the number of * broadcast messages that have been lost since the * last call. - * @reply: Return storage for received message. + * @msg: Return storage for received message. * @items: Additional items for this command. * * This struct is used with the KDBUS_CMD_RECV ioctl. @@ -562,62 +626,31 @@ enum kdbus_recv_return_flags { struct kdbus_cmd_recv { __u64 size; __u64 flags; - __u64 kernel_flags; __u64 return_flags; __s64 priority; __u64 dropped_msgs; struct kdbus_msg_info msg; struct kdbus_item items[0]; -} __attribute__((aligned(8))); +} __attribute__((__aligned__(8))); /** * struct kdbus_cmd_free - struct to free a slice of memory in the pool * @size: Overall size of this structure - * @offset: The offset of the memory slice, as returned by other - * ioctls * @flags: Flags for the free command, userspace → kernel * @return_flags: Command return flags, kernel → userspace - * @kernel_flags: Supported flags of the free command, userspace → kernel + * @offset: The offset of the memory slice, as returned by other + * ioctls * @items: Additional items to modify the behavior * * This struct is used with the KDBUS_CMD_FREE ioctl. */ struct kdbus_cmd_free { __u64 size; - __u64 offset; __u64 flags; - __u64 kernel_flags; __u64 return_flags; + __u64 offset; 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_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, -}; +} __attribute__((__aligned__(8))); /** * enum kdbus_hello_flags - flags for struct kdbus_cmd_hello @@ -643,49 +676,9 @@ enum kdbus_hello_flags { }; /** - * enum kdbus_attach_flags - flags for metadata attachments - * @KDBUS_ATTACH_TIMESTAMP: Timestamp - * @KDBUS_ATTACH_CREDS: Credentials - * @KDBUS_ATTACH_PIDS: PIDs - * @KDBUS_ATTACH_AUXGROUPS: Auxiliary groups - * @KDBUS_ATTACH_NAMES: Well-known names - * @KDBUS_ATTACH_TID_COMM: The "comm" process identifier of the TID - * @KDBUS_ATTACH_PID_COMM: The "comm" process identifier of the PID - * @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_DESCRIPTION: The human-readable connection name - * @_KDBUS_ATTACH_ALL: All of the above - * @_KDBUS_ATTACH_ANY: Wildcard match to enable any kind of - * metatdata. - */ -enum kdbus_attach_flags { - KDBUS_ATTACH_TIMESTAMP = 1ULL << 0, - KDBUS_ATTACH_CREDS = 1ULL << 1, - KDBUS_ATTACH_PIDS = 1ULL << 2, - KDBUS_ATTACH_AUXGROUPS = 1ULL << 3, - KDBUS_ATTACH_NAMES = 1ULL << 4, - KDBUS_ATTACH_TID_COMM = 1ULL << 5, - KDBUS_ATTACH_PID_COMM = 1ULL << 6, - KDBUS_ATTACH_EXE = 1ULL << 7, - KDBUS_ATTACH_CMDLINE = 1ULL << 8, - KDBUS_ATTACH_CGROUP = 1ULL << 9, - KDBUS_ATTACH_CAPS = 1ULL << 10, - KDBUS_ATTACH_SECLABEL = 1ULL << 11, - KDBUS_ATTACH_AUDIT = 1ULL << 12, - KDBUS_ATTACH_CONN_DESCRIPTION = 1ULL << 13, - _KDBUS_ATTACH_ALL = (1ULL << 14) - 1, - _KDBUS_ATTACH_ANY = ~0ULL -}; - -/** * struct kdbus_cmd_hello - struct to say hello to kdbus * @size: The total size of the structure * @flags: Connection flags (KDBUS_HELLO_*), userspace → kernel - * @kernel_flags: Supported connection flags, kernel → userspace * @return_flags: Command return flags, kernel → userspace * @attach_flags_send: Mask of metadata to attach to each message sent * off by this connection (KDBUS_ATTACH_*) @@ -710,7 +703,6 @@ enum kdbus_attach_flags { struct kdbus_cmd_hello { __u64 size; __u64 flags; - __u64 kernel_flags; __u64 return_flags; __u64 attach_flags_send; __u64 attach_flags_recv; @@ -721,165 +713,66 @@ struct kdbus_cmd_hello { __u64 items_size; __u8 id128[16]; struct kdbus_item items[0]; -} __attribute__((aligned(8))); +} __attribute__((__aligned__(8))); /** - * enum kdbus_make_flags - Flags for KDBUS_CMD_{BUS,EP,NS}_MAKE - * @KDBUS_MAKE_ACCESS_GROUP: Make the bus or endpoint node group-accessible - * @KDBUS_MAKE_ACCESS_WORLD: Make the bus or endpoint 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, - * userspace → kernel - * @kernel_flags: Supported flags for the used command, kernel → userspace - * @return_flags: Command return flags, kernel → userspace - * @items: Items describing details - * - * This structure is used with the KDBUS_CMD_BUS_MAKE and - * KDBUS_CMD_ENDPOINT_MAKE ioctls. - */ -struct kdbus_cmd_make { - __u64 size; - __u64 flags; - __u64 kernel_flags; - __u64 return_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_*), - * userspace → kernel, kernel → userspace - * @kernel_flags: Supported flags for a name entry, kernel → userspace - * @return_flags: Command return flags, kernel → userspace - * @items: Item list, containing the well-known name as - * KDBUS_ITEM_NAME - * - * This structure is used with the KDBUS_CMD_NAME_ACQUIRE ioctl. - */ -struct kdbus_cmd_name { - __u64 size; - __u64 flags; - __u64 kernel_flags; - __u64 return_flags; - struct kdbus_item items[0]; -} __attribute__((aligned(8))); - -/** - * struct kdbus_name_info - struct to describe a well-known name - * @size: The total size of the struct - * @conn_flags: The flags of the owning connection (KDBUS_HELLO_*) - * @owner_id: The current owner of the name - * @items: Item list, containing the well-known name as - * KDBUS_ITEM_OWNED_NAME - * - * This structure is used as return struct for the KDBUS_CMD_NAME_LIST ioctl. - */ -struct kdbus_name_info { - __u64 size; - __u64 conn_flags; - __u64 owner_id; - struct kdbus_item items[0]; -} __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 + * struct kdbus_info - connection information + * @size: total size of the struct + * @id: 64bit object ID + * @flags: object creation flags + * @items: list of items * * Note that the user is responsible for freeing the allocated memory with * the KDBUS_CMD_FREE ioctl. */ -struct kdbus_name_list { +struct kdbus_info { __u64 size; - struct kdbus_name_info names[0]; -}; + __u64 id; + __u64 flags; + struct kdbus_item items[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_list_flags - what to include into the returned list + * @KDBUS_LIST_UNIQUE: active connections + * @KDBUS_LIST_ACTIVATORS: activator connections + * @KDBUS_LIST_NAMES: known well-known names + * @KDBUS_LIST_QUEUED: 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, +enum kdbus_list_flags { + KDBUS_LIST_UNIQUE = 1ULL << 0, + KDBUS_LIST_NAMES = 1ULL << 1, + KDBUS_LIST_ACTIVATORS = 1ULL << 2, + KDBUS_LIST_QUEUED = 1ULL << 3, }; /** - * struct kdbus_cmd_name_list - request a list of name entries - * @flags: Flags for the query (KDBUS_NAME_LIST_*), - * userspace → kernel - * @kernel_flags: Supported flags for queries, kernel → userspace - * @return_flags: Command return flags, kernel → userspace - * @offset: The returned offset in the caller's pool buffer. + * struct kdbus_cmd_list - list connections + * @size: overall size of this object + * @flags: flags for the query (KDBUS_LIST_*), userspace → kernel + * @return_flags: command return flags, kernel → userspace + * @offset: Offset in the caller's pool buffer where an array of + * kdbus_info objects is stored. * The user must use KDBUS_CMD_FREE to free the * allocated memory. - * @list_size: Returned size of list in bytes - * @size: Output buffer to report size of data at @offset. + * @list_size: size of returned list in bytes * @items: Items for the command. Reserved for future use. * - * This structure is used with the KDBUS_CMD_NAME_LIST ioctl. + * This structure is used with the KDBUS_CMD_LIST ioctl. */ -struct kdbus_cmd_name_list { +struct kdbus_cmd_list { __u64 size; __u64 flags; - __u64 kernel_flags; __u64 return_flags; __u64 offset; __u64 list_size; struct kdbus_item items[0]; -} __attribute__((aligned(8))); - -/** - * struct kdbus_info - information returned by KDBUS_CMD_*_INFO - * @size: The total size of the struct - * @id: The connection's or bus' 64-bit ID - * @flags: The connection's or bus' 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_info { - __u64 size; - __u64 id; - __u64 flags; - struct kdbus_item items[0]; -}; +} __attribute__((__aligned__(8))); /** * struct kdbus_cmd_info - struct used for KDBUS_CMD_CONN_INFO ioctl * @size: The total size of the struct * @flags: KDBUS_ATTACH_* flags, userspace → kernel - * @kernel_flags: Supported KDBUS_ATTACH_* flags, kernel → userspace * @return_flags: Command return flags, kernel → userspace * @id: The 64-bit ID of the connection. If set to zero, passing * @name is required. kdbus will look up the name to @@ -899,31 +792,12 @@ struct kdbus_info { struct kdbus_cmd_info { __u64 size; __u64 flags; - __u64 kernel_flags; __u64 return_flags; __u64 id; __u64 offset; __u64 info_size; struct kdbus_item items[0]; -} __attribute__((aligned(8))); - -/** - * struct kdbus_cmd_update - update flags of a connection - * @size: The total size of the struct - * @flags: Flags for the update command, userspace → kernel - * @kernel_flags: Supported flags for this command, kernel → userspace - * @return_flags: Command return flags, kernel → userspace - * @items: A list of struct kdbus_item - * - * This struct is used with the KDBUS_CMD_CONN_UPDATE ioctl. - */ -struct kdbus_cmd_update { - __u64 size; - __u64 flags; - __u64 kernel_flags; - __u64 return_flags; - struct kdbus_item items[0]; -} __attribute__((aligned(8))); +} __attribute__((__aligned__(8))); /** * enum kdbus_cmd_match_flags - flags to control the KDBUS_CMD_MATCH_ADD ioctl @@ -938,12 +812,11 @@ enum kdbus_cmd_match_flags { /** * 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 * @flags: Flags for match command (KDBUS_MATCH_*), * userspace → kernel - * @kernel_flags: Supported flags of the used command, kernel → userspace * @return_flags: Command return flags, kernel → userspace + * @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_MATCH_ADD and @@ -951,98 +824,149 @@ enum kdbus_cmd_match_flags { */ struct kdbus_cmd_match { __u64 size; + __u64 flags; + __u64 return_flags; __u64 cookie; + struct kdbus_item items[0]; +} __attribute__((__aligned__(8))); + +/** + * enum kdbus_make_flags - Flags for KDBUS_CMD_{BUS,ENDPOINT}_MAKE + * @KDBUS_MAKE_ACCESS_GROUP: Make the bus or endpoint node group-accessible + * @KDBUS_MAKE_ACCESS_WORLD: Make the bus or endpoint node world-accessible + */ +enum kdbus_make_flags { + KDBUS_MAKE_ACCESS_GROUP = 1ULL << 0, + KDBUS_MAKE_ACCESS_WORLD = 1ULL << 1, +}; + +/** + * enum kdbus_name_flags - flags for KDBUS_CMD_NAME_ACQUIRE + * @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 - generic ioctl payload + * @size: Overall size of this structure + * @flags: Flags for this ioctl, userspace → kernel + * @return_flags: Ioctl return flags, kernel → userspace + * @items: Additional items to modify the behavior + * + * This is a generic ioctl payload object. It's used by all ioctls that only + * take flags and items as input. + */ +struct kdbus_cmd { + __u64 size; __u64 flags; - __u64 kernel_flags; __u64 return_flags; struct kdbus_item items[0]; -} __attribute__((aligned(8))); +} __attribute__((__aligned__(8))); /** * Ioctl API + * * KDBUS_CMD_BUS_MAKE: After opening the "control" node, this command * creates a new bus with the specified * name. The bus is immediately shut down and * cleaned up when the opened file descriptor is * closed. + * * KDBUS_CMD_ENDPOINT_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_ENDPOINT_UPDATE: Update the properties of a custom enpoint. Used + * to update the policy. + * * KDBUS_CMD_HELLO: By opening the bus node, a connection is * created. After a HELLO the opened connection * becomes an active peer on the bus. + * KDBUS_CMD_UPDATE: Update the properties of a connection. Used to + * update the metadata subscription mask and + * policy. * 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_FREE: Release the allocated memory in the receiver's + * pool. + * 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_BUS_CREATOR_INFO: Retrieve information of the creator of the bus + * a connection is attached to. + * * KDBUS_CMD_SEND: Send a message and pass data from userspace to * the kernel. * KDBUS_CMD_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 + * KDBUS_CMD_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_BUS_CREATOR_INFO: Retrieve information of the creator of the bus - * a connection is attached to. - * KDBUS_CMD_ENDPOINT_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 { + /* bus owner (00-0f) */ KDBUS_CMD_BUS_MAKE = _IOW(KDBUS_IOCTL_MAGIC, 0x00, - struct kdbus_cmd_make), + struct kdbus_cmd), + + /* endpoint owner (10-1f) */ KDBUS_CMD_ENDPOINT_MAKE = _IOW(KDBUS_IOCTL_MAGIC, 0x10, - struct kdbus_cmd_make), + struct kdbus_cmd), + KDBUS_CMD_ENDPOINT_UPDATE = _IOW(KDBUS_IOCTL_MAGIC, 0x11, + struct kdbus_cmd), - KDBUS_CMD_HELLO = _IOWR(KDBUS_IOCTL_MAGIC, 0x20, + /* connection owner (80-ff) */ + KDBUS_CMD_HELLO = _IOWR(KDBUS_IOCTL_MAGIC, 0x80, struct kdbus_cmd_hello), - KDBUS_CMD_BYEBYE = _IO(KDBUS_IOCTL_MAGIC, 0x21), - - KDBUS_CMD_SEND = _IOWR(KDBUS_IOCTL_MAGIC, 0x30, - struct kdbus_cmd_send), - KDBUS_CMD_RECV = _IOWR(KDBUS_IOCTL_MAGIC, 0x31, - struct kdbus_cmd_recv), - KDBUS_CMD_FREE = _IOW(KDBUS_IOCTL_MAGIC, 0x32, + KDBUS_CMD_UPDATE = _IOW(KDBUS_IOCTL_MAGIC, 0x81, + struct kdbus_cmd), + KDBUS_CMD_BYEBYE = _IOW(KDBUS_IOCTL_MAGIC, 0x82, + struct kdbus_cmd), + KDBUS_CMD_FREE = _IOW(KDBUS_IOCTL_MAGIC, 0x83, struct kdbus_cmd_free), - - KDBUS_CMD_NAME_ACQUIRE = _IOWR(KDBUS_IOCTL_MAGIC, 0x40, - struct kdbus_cmd_name), - KDBUS_CMD_NAME_RELEASE = _IOW(KDBUS_IOCTL_MAGIC, 0x41, - struct kdbus_cmd_name), - KDBUS_CMD_NAME_LIST = _IOWR(KDBUS_IOCTL_MAGIC, 0x42, - struct kdbus_cmd_name_list), - - KDBUS_CMD_CONN_INFO = _IOWR(KDBUS_IOCTL_MAGIC, 0x50, - struct kdbus_cmd_info), - KDBUS_CMD_CONN_UPDATE = _IOW(KDBUS_IOCTL_MAGIC, 0x51, - struct kdbus_cmd_update), - KDBUS_CMD_BUS_CREATOR_INFO = _IOWR(KDBUS_IOCTL_MAGIC, 0x52, - struct kdbus_cmd_info), - - KDBUS_CMD_ENDPOINT_UPDATE = _IOW(KDBUS_IOCTL_MAGIC, 0x61, - struct kdbus_cmd_update), - - KDBUS_CMD_MATCH_ADD = _IOW(KDBUS_IOCTL_MAGIC, 0x70, + KDBUS_CMD_CONN_INFO = _IOR(KDBUS_IOCTL_MAGIC, 0x84, + struct kdbus_cmd_info), + KDBUS_CMD_BUS_CREATOR_INFO = _IOR(KDBUS_IOCTL_MAGIC, 0x85, + struct kdbus_cmd_info), + KDBUS_CMD_LIST = _IOR(KDBUS_IOCTL_MAGIC, 0x86, + struct kdbus_cmd_list), + + KDBUS_CMD_SEND = _IOW(KDBUS_IOCTL_MAGIC, 0x90, + struct kdbus_cmd_send), + KDBUS_CMD_RECV = _IOR(KDBUS_IOCTL_MAGIC, 0x91, + struct kdbus_cmd_recv), + + KDBUS_CMD_NAME_ACQUIRE = _IOW(KDBUS_IOCTL_MAGIC, 0xa0, + struct kdbus_cmd), + KDBUS_CMD_NAME_RELEASE = _IOW(KDBUS_IOCTL_MAGIC, 0xa1, + struct kdbus_cmd), + + KDBUS_CMD_MATCH_ADD = _IOW(KDBUS_IOCTL_MAGIC, 0xb0, struct kdbus_cmd_match), - KDBUS_CMD_MATCH_REMOVE = _IOW(KDBUS_IOCTL_MAGIC, 0x71, + KDBUS_CMD_MATCH_REMOVE = _IOW(KDBUS_IOCTL_MAGIC, 0xb1, struct kdbus_cmd_match), }; |