2 * Copyright (C) 2013 Kay Sievers
3 * Copyright (C) 2013 Greg Kroah-Hartman <gregkh@linuxfoundation.org>
4 * Copyright (C) 2013 Linux Foundation
5 * Copyright (C) 2013 Lennart Poettering
6 * Copyright (C) 2013 Daniel Mack <daniel@zonque.org>
8 * kdbus is free software; you can redistribute it and/or modify it under
9 * the terms of the GNU Lesser General Public License as published by the
10 * Free Software Foundation; either version 2.1 of the License, or (at
11 * your option) any later version.
18 #include <sys/ioctl.h>
19 #include <sys/types.h>
20 #include <linux/types.h>
23 #define KDBUS_IOC_MAGIC 0x95
24 #define KDBUS_SRC_ID_KERNEL (0)
25 #define KDBUS_DST_ID_NAME (0)
26 #define KDBUS_MATCH_SRC_ID_ANY (~0ULL)
27 #define KDBUS_DST_ID_BROADCAST (~0ULL)
30 * struct kdbus_notify_name_change - name registry change message
31 * @old_id: Former owner of a name
32 * @new_id: New owner of a name
33 * @flags: flags from KDBUS_NAME_*
34 * @name: Well-known name
36 * Sent from kernel to userspace when the owner or starter of
37 * a well-known name changes.
41 * KDBUS_ITEM_NAME_REMOVE
42 * KDBUS_ITEM_NAME_CHANGE
44 struct kdbus_notify_name_change {
52 * struct kdbus_notify_id_change - name registry change message
53 * @id: New or former owner of the name
54 * @flags: flags field from KDBUS_HELLO_*
56 * Sent from kernel to userspace when the owner or starter of
57 * a well-known name changes.
61 * KDBUS_ITEM_ID_REMOVE
63 struct kdbus_notify_id_change {
69 * struct kdbus_creds - process credentials
74 * @starttime: Starttime of the process
76 * The starttime of the process PID. This is useful to detect PID overruns
77 * from the client side. i.e. if you use the PID to look something up in
78 * /proc/$PID/ you can afterwards check the starttime field of it, to ensure
79 * you didn't run into a PID overrun.
93 * struct kdbus_audit - audit information
94 * @sessionid: The audit session ID
95 * @loginuid: The audit login uid
106 * struct kdbus_timestamp
107 * @monotonic_ns: Monotonic timestamp, in nanoseconds
108 * @realtime_ns: Realtime timestamp, in nanoseconds
111 * KDBUS_ITEM_TIMESTAMP
113 struct kdbus_timestamp {
119 * struct kdbus_vec - I/O vector for kdbus payload items
120 * @size: The size of the vector
121 * @address: Memory address for memory addresses
122 * @offset: Offset in the in-message payload memory
125 * KDBUS_ITEM_PAYLOAD_VEC
136 * struct kdbus_memfd - a kdbus memfd
137 * @size: The memfd's size
138 * @fd: The file descriptor number
139 * @__pad: Padding to make the struct aligned
142 * KDBUS_ITEM_PAYLOAD_MEMFD
151 * struct kdbus_name - a registered well-known name with its flags
152 * @flags: flags from KDBUS_NAME_*
153 * @name: well-known name
164 * struct kdbus_policy_access - policy access item
165 * @type: One of KDBUS_POLICY_ACCESS_* types
166 * @bits: Access to grant. One of KDBUS_POLICY_*
167 * @id: For KDBUS_POLICY_ACCESS_USER, the uid
168 * For KDBUS_POLICY_ACCESS_GROUP, the gid
171 * struct kdbus_policy
173 struct kdbus_policy_access {
174 __u64 type; /* USER, GROUP, WORLD */
175 __u64 bits; /* RECV, SEND, OWN */
176 __u64 id; /* uid, gid, 0 */
180 * struct kdbus_policy - a policy item
181 * @access: Policy access details
182 * @name: Well-known name to grant access to
185 * KDBUS_POLICY_ACCESS
186 * KDBUS_ITEM_POLICY_NAME
188 struct kdbus_policy {
190 struct kdbus_policy_access access;
195 /* item types to chain data in lists of items */
196 enum kdbus_item_type {
198 _KDBUS_ITEM_USER_BASE,
199 KDBUS_ITEM_PAYLOAD_VEC = _KDBUS_ITEM_USER_BASE, /* .data_vec */
200 KDBUS_ITEM_PAYLOAD_OFF, /* data at returned offset in the pool */
201 KDBUS_ITEM_PAYLOAD_MEMFD, /* data as sealed memfd */
202 KDBUS_ITEM_FDS, /* attached file descriptors */
203 KDBUS_ITEM_BLOOM, /* for broadcasts, carries bloom filter */
204 KDBUS_ITEM_DST_NAME, /* destination's well-known name */
205 KDBUS_ITEM_PRIORITY, /* queue priority for message */
206 KDBUS_ITEM_MAKE_NAME,
208 _KDBUS_ITEM_POLICY_BASE = 0x400,
209 KDBUS_ITEM_POLICY_NAME = _KDBUS_ITEM_POLICY_BASE,
210 KDBUS_ITEM_POLICY_ACCESS,
212 _KDBUS_ITEM_ATTACH_BASE = 0x600,
213 KDBUS_ITEM_NAME = _KDBUS_ITEM_ATTACH_BASE,
214 KDBUS_ITEM_STARTER_NAME,
215 KDBUS_ITEM_TIMESTAMP,
226 /* Special messages from kernel */
227 _KDBUS_ITEM_KERNEL_BASE = 0x800,
228 KDBUS_ITEM_NAME_ADD = _KDBUS_ITEM_KERNEL_BASE,
229 KDBUS_ITEM_NAME_REMOVE, /* .name_change */
230 KDBUS_ITEM_NAME_CHANGE, /* .name_change */
231 KDBUS_ITEM_ID_ADD, /* .id_change */
232 KDBUS_ITEM_ID_REMOVE, /* .id_change */
233 KDBUS_ITEM_REPLY_TIMEOUT, /* empty, reply_cookie is filled in */
234 KDBUS_ITEM_REPLY_DEAD, /* dito */
238 * struct kdbus_item - chain of data blocks
239 * @size: Overall data record size
240 * @type: Kdbus_item type of data
241 * @data: Generic bytes
242 * @data32: Generic 32 bit array
243 * @data64: Generic 64 bit array
244 * @str: Generic string
246 * @vec: KDBUS_ITEM_PAYLOAD_VEC
247 * @creds: KDBUS_ITEM_CREDS
248 * @audit: KDBUS_ITEM_AUDIT
249 * @timestamp: KDBUS_ITEM_TIMESTAMP
250 * @name: KDBUS_ITEM_NAME
251 * @memfd: KDBUS_ITEM_PAYLOAD_MEMFD
252 * @name_change: KDBUS_ITEM_NAME_ADD
253 * KDBUS_ITEM_NAME_REMOVE
254 * KDBUS_ITEM_NAME_CHANGE
255 * @id_change: KDBUS_ITEM_ID_ADD
256 * KDBUS_ITEM_ID_REMOVE
257 * @policy: KDBUS_ITEM_POLICY_NAME
258 * KDBUS_ITEM_POLICY_ACCESS
270 struct kdbus_vec vec;
271 struct kdbus_creds creds;
272 struct kdbus_audit audit;
273 struct kdbus_timestamp timestamp;
274 struct kdbus_name name;
275 struct kdbus_memfd memfd;
277 struct kdbus_notify_name_change name_change;
278 struct kdbus_notify_id_change id_change;
279 struct kdbus_policy policy;
284 * enum kdbus_msg_flags - type of message
285 * @KDBUS_MSG_FLAGS_EXPECT_REPLY: Expect a reply message, used for method
286 * calls. The cookie identifies the
287 * message and the respective reply
288 * @KDBUS_MSG_FLAGS_NO_AUTO_START: Do not start a service, if the addressed
289 * name is not currently active
291 enum kdbus_msg_flags {
292 KDBUS_MSG_FLAGS_EXPECT_REPLY = 1 << 0,
293 KDBUS_MSG_FLAGS_NO_AUTO_START = 1 << 1,
297 * enum kdbus_payload_type - type of payload carried by message
298 * @KDBUS_PAYLOAD_KERNEL: Kernel-generated simple message
299 * @KDBUS_PAYLOAD_DBUS1: Legacy D-Bus version 1 marshalling
300 * @KDBUS_PAYLOAD_GVARIANT: GVariant marshalling
302 enum kdbus_payload_type {
303 KDBUS_PAYLOAD_KERNEL,
304 KDBUS_PAYLOAD_DBUS1 = 0x4442757356657231ULL, /* 'DBusVer1' */
305 KDBUS_PAYLOAD_GVARIANT = 0x4756617269616e74ULL, /* 'GVariant' */
309 * struct kdbus_msg - the representation of a kdbus message
310 * @size: Total size of the message
311 * @flags: Message flags (KDBUS_MSG_FLAGS_*)
312 * @dst_id: 64-bit ID of the destination connection
313 * @src_id: 64-bit ID of the source connection
314 * @payload_type: Payload type (KDBUS_PAYLOAD_*)
315 * @cookie: Userspace-supplied cookie
316 * @cookie_reply: For kernel-generated messages, this is the cookie
317 * the message is a reply to
318 * @timeout_ns: For non-kernel-generated messages, this denotes the
319 * message timeout in nanoseconds
320 * @items: A list of kdbus_items containing the message payload
333 struct kdbus_item items[0];
337 * enum kdbus_policy_access_type - permissions of a policy record
338 * @KDBUS_POLICY_ACCESS_USER: Grant access to a uid
339 * @KDBUS_POLICY_ACCESS_GROUP: Grant acces to gid
340 * @KDBUS_POLICY_ACCESS_WORLD: World-accessible
342 enum kdbus_policy_access_type {
343 _KDBUS_POLICY_ACCESS_NULL,
344 KDBUS_POLICY_ACCESS_USER,
345 KDBUS_POLICY_ACCESS_GROUP,
346 KDBUS_POLICY_ACCESS_WORLD,
350 * enum kdbus_policy_access_flags - mode flags
351 * @KDBUS_POLICY_RECV: Allow receive
352 * @KDBUS_POLICY_SEND: Allow send
353 * @KDBUS_POLICY_OWN: Allow to own a well-known name
355 enum kdbus_policy_type {
356 KDBUS_POLICY_RECV = 1 << 2,
357 KDBUS_POLICY_SEND = 1 << 1,
358 KDBUS_POLICY_OWN = 1 << 0,
362 * struct kdbus_cmd_policy - a series of policies to upload
363 * @size: The total size of the structure
364 * @policies: The policies to upload
366 * A KDBUS_POLICY_NAME must always preceed a KDBUS_POLICY_ACCESS entry.
367 * A new KDBUS_POLICY_NAME can be added after KDBUS_POLICY_ACCESS for
368 * chaining multiple policies together.
370 struct kdbus_cmd_policy {
372 struct kdbus_item policies[0];
376 * enum kdbus_hello_flags - flags for struct kdbus_cmd_hello
377 * @KDBUS_HELLO_STARTER: The connection registers a name for activation
379 * @KDBUS_HELLO_ACCEPT_FD: The connection allows the receiving of
380 * any passed file descriptors
382 enum kdbus_hello_flags {
383 KDBUS_HELLO_STARTER = 1 << 0,
384 KDBUS_HELLO_ACCEPT_FD = 1 << 1,
388 * enum kdbus_attach_flags - flags for metadata attachments
389 * @KDBUS_ATTACH_TIMESTAMP: Timestamp
390 * @KDBUS_ATTACH_CREDS: Credentials
391 * @KDBUS_ATTACH_NAMES: Well-known names
392 * @KDBUS_ATTACH_COMM: The "comm" process identifier
393 * @KDBUS_ATTACH_EXE: The path of the executable
394 * @KDBUS_ATTACH_CMDLINE: The process command line
395 * @KDBUS_ATTACH_CGROUP: The croup membership
396 * @KDBUS_ATTACH_CAPS: The process capabilities
397 * @KDBUS_ATTACH_SECLABEL: The security label
398 * @KDBUS_ATTACH_AUDIT: The audit IDs
400 enum kdbus_attach_flags {
401 KDBUS_ATTACH_TIMESTAMP = 1 << 0,
402 KDBUS_ATTACH_CREDS = 1 << 1,
403 KDBUS_ATTACH_NAMES = 1 << 2,
404 KDBUS_ATTACH_COMM = 1 << 3,
405 KDBUS_ATTACH_EXE = 1 << 4,
406 KDBUS_ATTACH_CMDLINE = 1 << 5,
407 KDBUS_ATTACH_CGROUP = 1 << 6,
408 KDBUS_ATTACH_CAPS = 1 << 7,
409 KDBUS_ATTACH_SECLABEL = 1 << 8,
410 KDBUS_ATTACH_AUDIT = 1 << 9,
414 * struct kdbus_cmd_hello - struct to say hello to kdbus
415 * @size: The total size of the structure
416 * @conn_flags: Connection flags (KDBUS_HELLO_*). The kernel will
417 * return its capabilities in that field.
418 * @attach_flags: Mask of metdata to attach to each message sent
420 * @bus_flags: The flags field copied verbatim from the original
421 * KDBUS_CMD_BUS_MAKE ioctl. It's intended to be useful
422 * to do negotiation of features of the payload that is
423 * transferred (kernel → userspace)
424 * @id: The ID of this connection (kernel → userspace)
425 * @bloom_size: The bloom filter size chosen by the owner
426 * (kernel → userspace)
427 * @pool_size: Maximum size of the pool buffer (kernel → userspace)
428 * @id128: Unique 128-bit ID of the bus (kernel → userspace)
429 * @items: A list of items
431 * This struct is used with the KDBUS_CMD_HELLO ioctl. See the ioctl
432 * documentation for more information.
434 struct kdbus_cmd_hello {
437 /* userspace → kernel, kernel → userspace */
441 /* kernel → userspace */
448 struct kdbus_item items[0];
451 /* Flags for KDBUS_CMD_{BUS,EP,NS}_MAKE */
452 enum kdbus_make_flags {
453 KDBUS_MAKE_ACCESS_GROUP = 1 << 0,
454 KDBUS_MAKE_ACCESS_WORLD = 1 << 1,
455 KDBUS_MAKE_POLICY_OPEN = 1 << 2,
459 * struct kdbus_cmd_bus_make - struct to make a bus
460 * @size: The total size of the struct
461 * @flags: Properties for the bus to create
462 * @bloom_size: Size of the bloom filter for this bus
463 * @items: Items describing details such as the name of the bus
465 * This structure is used with the KDBUS_CMD_BUS_MAKE ioctl. Refer to the
466 * documentation for more information.
468 struct kdbus_cmd_bus_make {
472 struct kdbus_item items[0];
476 * struct kdbus_cmd_ep_make - struct to make an endpoint
477 * @size: The total size of the struct
478 * @flags: Unused for now
479 * @items: Items describing details such as the
480 * name of the endpoint
482 * This structure is used with the KDBUS_CMD_EP_MAKE ioctl. Refer to the
483 * documentation for more information.
485 struct kdbus_cmd_ep_make {
488 struct kdbus_item items[0];
492 * struct kdbus_cmd_ns_make - struct to make a namespace
493 * @size: The total size of the struct
494 * @flags: Unused for now
495 * @items: Items describing details such as the
496 * name of the namespace
498 * This structure is used with the KDBUS_CMD_NS_MAKE ioctl. Refer to the
499 * documentation for more information.
501 struct kdbus_cmd_ns_make {
504 struct kdbus_item items[0];
507 enum kdbus_name_flags {
508 /* userspace → kernel */
509 KDBUS_NAME_REPLACE_EXISTING = 1 << 0,
510 KDBUS_NAME_QUEUE = 1 << 1,
511 KDBUS_NAME_ALLOW_REPLACEMENT = 1 << 2,
513 /* kernel → userspace */
514 KDBUS_NAME_IN_QUEUE = 1 << 16,
518 * struct kdbus_cmd_name - struct to describe a well-known name
519 * @size: The total size of the struct
520 * @flags: Flags for a name entry (KDBUS_NAME_*)
521 * @id: Priviledged users may use this field to (de)register
522 * names on behalf of other peers.
523 * @conn_flags: The flags of the owning connection (KDBUS_HELLO_*)
524 * @name: The well-known name
526 * This structure is used with the KDBUS_CMD_NAME_ACQUIRE ioctl.
527 * Refer to the documentation for more information.
529 struct kdbus_cmd_name {
537 enum kdbus_name_list_flags {
538 KDBUS_NAME_LIST_UNIQUE = 1 << 0,
539 KDBUS_NAME_LIST_NAMES = 1 << 1,
540 KDBUS_NAME_LIST_STARTERS = 1 << 2,
541 KDBUS_NAME_LIST_QUEUED = 1 << 3,
545 * struct kdbus_cmd_name_list - request a list of name entries
546 * @flags: Flags for the query (KDBUS_NAME_LIST_*)
547 * @offset: The returned offset in the caller's pool buffer.
548 * The user must use KDBUS_CMD_FREE to free the
551 * This structure is used with the KDBUS_CMD_NAME_LIST ioctl.
553 struct kdbus_cmd_name_list {
559 * struct kdbus_name_list - information returned by KDBUS_CMD_NAME_LIST
560 * @size: The total size of the structure
561 * @names: A list of names
563 * Note that the user is responsible for freeing the allocated memory with
564 * the KDBUS_CMD_FREE ioctl.
566 struct kdbus_name_list {
568 struct kdbus_cmd_name names[0];
572 * struct kdbus_cmd_conn_info - struct used for KDBUS_CMD_CONN_INFO ioctl
573 * @size: The total size of the struct
574 * @flags: KDBUS_ATTACH_* flags
575 * @id: The 64-bit ID of the connection. If set to zero, passing
576 * @name is required. kdbus will look up the name to determine
577 * the ID in this case.
578 * @offset: Returned offset in the caller's pool buffer where the
579 * kdbus_name_info struct result is stored. The user must
580 * use KDBUS_CMD_FREE to free the allocated memory.
581 * @name: The optional well-known name to look up. Only needed in
584 * On success, the KDBUS_CMD_CONN_INFO ioctl will return 0 and @offset will
585 * tell the user the offset in the connection pool buffer at which to find the
586 * result in a struct kdbus_conn_info.
588 struct kdbus_cmd_conn_info {
597 * struct kdbus_conn_info - information returned by KDBUS_CMD_CONN_INFO
598 * @size: The total size of the struct
599 * @id: The connection's 64-bit ID
600 * @flags: The connection's flags
601 * @items: A list of struct kdbus_item
603 * Note that the user is responsible for freeing the allocated memory with
604 * the KDBUS_CMD_FREE ioctl.
606 struct kdbus_conn_info {
610 struct kdbus_item items[0];
614 * enum kdbus_match_type - type of match record
615 * @KDBUS_MATCH_BLOOM: Matches against KDBUS_MSG_BLOOM
616 * @KDBUS_MATCH_SRC_NAME: Matches a name string
617 * @KDBUS_MATCH_NAME_ADD: Matches a name string
618 * @KDBUS_MATCH_NAME_REMOVE: Matches a name string
619 * @KDBUS_MATCH_NAME_CHANGE: Matches a name string
620 * @KDBUS_MATCH_ID_ADD: Matches an ID
621 * @KDBUS_MATCH_ID_REMOVE: Matches an ID
623 enum kdbus_match_type {
626 KDBUS_MATCH_SRC_NAME,
627 KDBUS_MATCH_NAME_ADD,
628 KDBUS_MATCH_NAME_REMOVE,
629 KDBUS_MATCH_NAME_CHANGE,
631 KDBUS_MATCH_ID_REMOVE,
635 * struct kdbus_cmd_match - struct to add or remove matches
636 * @size: The total size of the struct
637 * @id: Privileged users may (de)register matches on behalf
638 * of other peers. In other cases, set to 0.
639 * @cookie: Userspace supplied cookie. When removing, the cookie
640 * identifies the match to remove.
641 * @src_id: The source ID to match against. Use
642 * KDBUS_MATCH_SRC_ID_ANY or any other value for a unique
644 * @items: A list of items for additional information
646 * This structure is used with the KDBUS_CMD_ADD_MATCH and
647 * KDBUS_CMD_REMOVE_MATCH ioctl. Refer to the documentation for more
650 struct kdbus_cmd_match {
655 struct kdbus_item items[0];
658 enum kdbus_monitor_flags {
659 KDBUS_MONITOR_ENABLE = 1 << 0,
663 * struct kdbus_cmd_monitor - struct to enable or disable eavesdropping
664 * @id: Priviledged users may enable or disable the monitor feature
665 * on behalf of other peers
666 * @flags: Use KDBUS_MONITOR_ENABLE to enable eavesdropping
668 * This structure is used with the KDBUS_CMD_MONITOR ioctl.
669 * Refer to the documentation for more information.
671 struct kdbus_cmd_monitor {
677 * enum kdbus_ioctl_type - Ioctl API
678 * @KDBUS_CMD_BUS_MAKE: After opening the "control" device node, this
679 * command creates a new bus with the specified
680 * name. The bus is immediately shut down and
681 * cleaned up when the opened "control" device node
683 * @KDBUS_CMD_NS_MAKE: Similar to KDBUS_CMD_BUS_MAKE, but it creates a
684 * new kdbus namespace.
685 * @KDBUS_CMD_EP_MAKE: Creates a new named special endpoint to talk to
686 * the bus. Such endpoints usually carry a more
687 * restrictive policy and grant restricted access
688 * to specific applications.
689 * @KDBUS_CMD_HELLO: By opening the bus device node a connection is
690 * created. After a HELLO the opened connection
691 * becomes an active peer on the bus.
692 * @KDBUS_CMD_MSG_SEND: Send a message and pass data from userspace to
694 * @KDBUS_CMD_MSG_RECV: Receive a message from the kernel which is
695 * placed in the receiver's pool.
696 * @KDBUS_CMD_FREE: Release the allocated memory in the receiver's
698 * @KDBUS_CMD_NAME_ACQUIRE: Request a well-known bus name to associate with
699 * the connection. Well-known names are used to
700 * address a peer on the bus.
701 * @KDBUS_CMD_NAME_RELEASE: Release a well-known name the connection
703 * @KDBUS_CMD_NAME_LIST: Retrieve the list of all currently registered
704 * well-known and unique names.
705 * @KDBUS_CMD_CONN_INFO: Retrieve credentials and properties of the
706 * initial creator of the connection. The data was
707 * stored at registration time and does not
708 * neccessarily represent the connected process or
709 * the actual state of the process.
710 * @KDBUS_CMD_MATCH_ADD: Install a match which broadcast messages should
711 * be delivered to the connection.
712 * @KDBUS_CMD_MATCH_REMOVE: Remove a current match for broadcast messages.
713 * @KDBUS_CMD_MONITOR: Monitor the bus and receive all transmitted
714 * messages. Privileges are required for this
716 * @KDBUS_CMD_EP_POLICY_SET: Set the policy of an endpoint. It is used to
717 * restrict the access for endpoints created with
719 * @KDBUS_CMD_MEMFD_NEW: Return a new file descriptor which provides an
720 * anonymous shared memory file and which can be
721 * used to pass around larger chunks of data.
722 * Kdbus memfd files can be sealed, which allows
723 * the receiver to trust the data it has received.
724 * Kdbus memfd files expose only very limited
725 * operations, they can be mmap()ed, seek()ed,
726 * (p)read(v)() and (p)write(v)(); most other
727 * common file operations are not implemented.
728 * Special caution needs to be taken with
729 * read(v)()/write(v)() on a shared file; the
730 * underlying file position is always shared
731 * between all users of the file and race against
732 * each other, pread(v)()/pwrite(v)() avoid these
734 * @KDBUS_CMD_MEMFD_SIZE_GET: Return the size of the underlying file, which
735 * changes with write().
736 * @KDBUS_CMD_MEMFD_SIZE_SET: Truncate the underlying file to the specified
738 * @KDBUS_CMD_MEMFD_SEAL_GET: Return the state of the file sealing.
739 * @KDBUS_CMD_MEMFD_SEAL_SET: Seal or break a seal of the file. Only files
740 * which are not shared with other processes and
741 * which are currently not mapped can be sealed.
742 * The current process needs to be the one and
743 * single owner of the file, the sealing cannot
744 * be changed as long as the file is shared.
746 enum kdbus_ioctl_type {
747 KDBUS_CMD_BUS_MAKE = _IOW (KDBUS_IOC_MAGIC, 0x00, struct kdbus_cmd_bus_make),
748 KDBUS_CMD_NS_MAKE = _IOR (KDBUS_IOC_MAGIC, 0x10, struct kdbus_cmd_ns_make),
750 KDBUS_CMD_EP_MAKE = _IOW (KDBUS_IOC_MAGIC, 0x20, struct kdbus_cmd_ep_make),
751 KDBUS_CMD_HELLO = _IOWR(KDBUS_IOC_MAGIC, 0x30, struct kdbus_cmd_hello),
753 KDBUS_CMD_MSG_SEND = _IOW (KDBUS_IOC_MAGIC, 0x40, struct kdbus_msg),
754 KDBUS_CMD_MSG_RECV = _IOR (KDBUS_IOC_MAGIC, 0x41, __u64 *),
755 KDBUS_CMD_FREE = _IOW (KDBUS_IOC_MAGIC, 0x42, __u64 *),
757 KDBUS_CMD_NAME_ACQUIRE = _IOWR(KDBUS_IOC_MAGIC, 0x50, struct kdbus_cmd_name),
758 KDBUS_CMD_NAME_RELEASE = _IOW (KDBUS_IOC_MAGIC, 0x51, struct kdbus_cmd_name),
759 KDBUS_CMD_NAME_LIST = _IOWR(KDBUS_IOC_MAGIC, 0x52, struct kdbus_cmd_name_list),
761 KDBUS_CMD_CONN_INFO = _IOWR(KDBUS_IOC_MAGIC, 0x60, struct kdbus_cmd_conn_info),
763 KDBUS_CMD_MATCH_ADD = _IOW (KDBUS_IOC_MAGIC, 0x70, struct kdbus_cmd_match),
764 KDBUS_CMD_MATCH_REMOVE = _IOW (KDBUS_IOC_MAGIC, 0x71, struct kdbus_cmd_match),
765 KDBUS_CMD_MONITOR = _IOW (KDBUS_IOC_MAGIC, 0x72, struct kdbus_cmd_monitor),
767 KDBUS_CMD_EP_POLICY_SET = _IOW (KDBUS_IOC_MAGIC, 0x80, struct kdbus_cmd_policy),
769 KDBUS_CMD_MEMFD_NEW = _IOR (KDBUS_IOC_MAGIC, 0x90, int *),
770 KDBUS_CMD_MEMFD_SIZE_GET = _IOR (KDBUS_IOC_MAGIC, 0x91, __u64 *),
771 KDBUS_CMD_MEMFD_SIZE_SET = _IOW (KDBUS_IOC_MAGIC, 0x92, __u64 *),
772 KDBUS_CMD_MEMFD_SEAL_GET = _IOR (KDBUS_IOC_MAGIC, 0x93, int *),
773 KDBUS_CMD_MEMFD_SEAL_SET = _IO (KDBUS_IOC_MAGIC, 0x94),
777 * errno - api error codes
778 * @E2BIG: A message contains too many records or items.
779 * @EADDRNOTAVAIL: A message flagged not to activate a service, addressed
780 * a service which is not currently running.
781 * @EAGAIN: No messages are queued at the moment.
782 * @EBADF: File descriptors passed with the message are not valid.
783 * @EBADFD: A bus connection is in a corrupted state.
784 * @EBADMSG: Passed data contains a combination of conflicting or
785 * inconsistent types.
786 * @EBUSY: A well-known bus name is already taken by another
788 * @ECOMM: A peer does not accept the file descriptors addressed
790 * @EDESTADDRREQ: The well-known bus name is required but missing.
791 * @EDOM: The size of data does not match the expectations. Used
792 * for the size of the bloom filter bit field.
793 * @EEXIST: A requested namespace, bus or endpoint with the same
794 * name already exists. A specific data type, which is
795 * only expected once, is provided multiple times.
796 * @EFAULT: The supplied memory could not be accessed, or the data
797 * is not properly aligned.
798 * @EINVAL: The provided data does not match its type or other
799 * expectations, like a string which is not NUL terminated,
800 * or a string length that points behind the first
801 * \0-byte in the string.
802 * @EMEDIUMTYPE: A file descriptor which is not a kdbus memfd was
803 * refused to send as KDBUS_MSG_PAYLOAD_MEMFD.
804 * @EMFILE: Too many file descriptors have been supplied with a
806 * @EMSGSIZE: The supplied data is larger than the allowed maximum
808 * @ENAMETOOLONG: The requested name is larger than the allowed maximum
810 * @ENOBUFS: There is no space left for the submitted data to fit
811 * into the receiver's pool.
812 * @ENOMEM: Out of memory.
813 * @ENOSYS: The requested functionality is not available.
814 * @ENOTCONN: The addressed peer is not an active connection.
815 * @ENOTSUPP: The feature negotiation failed, a not supported feature
817 * @ENOTTY: An unknown ioctl command was received.
818 * @ENOTUNIQ: A specific data type was addressed to a broadcast
819 * address, but only direct addresses support this kind of
821 * @ENXIO: A unique address does not exist.
822 * @EPERM: The policy prevented an operation. The requested
823 * resource is owned by another entity.
824 * @ESHUTDOWN: The connection is currently shutting down, no further
825 * operations are possible.
826 * @ESRCH: A requested well-known bus name is not found.
827 * @ETXTBSY: A kdbus memfd file cannot be sealed or the seal removed,
828 * because it is shared with other processes or still
830 * @EXFULL: The size limits in the pool are reached, no data of
831 * the size tried to submit can be queued.