From 902fda77a6191f69698c7be4c1eaeac834824c50 Mon Sep 17 00:00:00 2001 From: Marcel Holtmann Date: Tue, 20 May 2014 19:54:16 -0700 Subject: [PATCH] build: Add copy of kernel kdbus.h public header --- Makefile.am | 4 +- linux/kdbus.h | 949 ++++++++++++++++++++++++++++++++++++++++++++++++++ 2 files changed, 951 insertions(+), 2 deletions(-) create mode 100644 linux/kdbus.h diff --git a/Makefile.am b/Makefile.am index 39b2dcf0..a840a4a3 100644 --- a/Makefile.am +++ b/Makefile.am @@ -33,8 +33,8 @@ ell_libell_internal_la_SOURCES = $(ell_sources) bin_PROGRAMS = src/iwd client/iwctl -src_iwd_SOURCES = src/main.c linux/nl80211.h \ - src/sha1.h src/sha1.c +src_iwd_SOURCES = src/main.c linux/nl80211.h linux/kdbus.h \ + src/sha1.h src/sha1.c src_iwd_LDADD = ell/libell-internal.la client_iwctl_SOURCES = client/main.c diff --git a/linux/kdbus.h b/linux/kdbus.h new file mode 100644 index 00000000..0b189cb5 --- /dev/null +++ b/linux/kdbus.h @@ -0,0 +1,949 @@ +/* + * Copyright (C) 2013 Kay Sievers + * Copyright (C) 2013 Greg Kroah-Hartman + * Copyright (C) 2013 Linux Foundation + * Copyright (C) 2013 Lennart Poettering + * Copyright (C) 2013 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_H_ +#define _KDBUS_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 + */ +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_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_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 = 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_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 = 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_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 one or multiple names. The + * provided names are not activated, and are not + * registered with the name database + * @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_POLICY_HOLDER = 1 << 2, + KDBUS_HELLO_MONITOR = 1 << 3, +}; + +/** + * 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 + * @_KDBUS_ATTACH_ALL: All of the above + */ +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, + _KDBUS_ATTACH_ALL = (1 << 11) - 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 = 1 << 0, + KDBUS_MAKE_ACCESS_WORLD = 1 << 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 = 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. + * @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_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))); + +/** + * 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_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 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_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. + * @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_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), + + KDBUS_CMD_MEMFD_NEW = _IOWR(KDBUS_IOCTL_MAGIC, 0xc0, + struct kdbus_cmd_memfd_make), + KDBUS_CMD_MEMFD_SIZE_GET = _IOR(KDBUS_IOCTL_MAGIC, 0xc1, __u64 *), + KDBUS_CMD_MEMFD_SIZE_SET = _IOW(KDBUS_IOCTL_MAGIC, 0xc2, __u64 *), + KDBUS_CMD_MEMFD_SEAL_GET = _IOR(KDBUS_IOCTL_MAGIC, 0xc3, int *), + KDBUS_CMD_MEMFD_SEAL_SET = _IO(KDBUS_IOCTL_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. + * @EALREADY: A requested name is already owned by the connection, + * a connection is already disconnected, memfd is already + * sealed or has the requested size. + * @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. + * @ECANCELED: A synchronous message sending was cancelled. + * @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 bloom bit field sizes. + * @EEXIST: A requested domain, 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. + * Too many connections or buses are created for a given + * user. + * @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 to be cancelled message was not found. + * @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. + * @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. + * @EOPNOTSUPP: The feature negotiation failed, a not supported feature + * was requested, or an unknown item type was received. + * @EPERM: The policy prevented an operation. The requested + * resource is owned by another entity. + * @EPIPE: When sending a message, a synchronous reply from the + * receiving connection was expected but the connection + * died before answering. + * @ESHUTDOWN: A domain, bus or endpoint is currently shutting down; + * no further operations will be possible. + * @ESRCH: A requested well-known bus name is not found. + * @ETIMEDOUT: A synchronous wait for a message reply did not arrive + * within the specified time frame. + * @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