diff options
| -rw-r--r-- | Makefile.am | 1 | ||||
| -rw-r--r-- | src/core/bus-policy.c | 2 | ||||
| -rw-r--r-- | src/core/bus-policy.h | 3 | ||||
| -rw-r--r-- | src/core/busname.c | 2 | ||||
| -rw-r--r-- | src/libsystemd/sd-bus/bus-internal.h | 2 | ||||
| -rw-r--r-- | src/libsystemd/sd-bus/kdbus.h | 984 |
6 files changed, 5 insertions, 989 deletions
diff --git a/Makefile.am b/Makefile.am index 0b9313ab12..734321e1a9 100644 --- a/Makefile.am +++ b/Makefile.am @@ -3218,7 +3218,6 @@ libsystemd_internal_la_SOURCES = \ src/libsystemd/sd-bus/bus-slot.c \ src/libsystemd/sd-bus/bus-slot.h \ src/libsystemd/sd-bus/bus-protocol.h \ - src/libsystemd/sd-bus/kdbus.h \ src/libsystemd/sd-bus/bus-dump.c \ src/libsystemd/sd-bus/bus-dump.h \ src/libsystemd/sd-utf8/sd-utf8.c \ diff --git a/src/core/bus-policy.c b/src/core/bus-policy.c index 4907c268e8..8053e62e09 100644 --- a/src/core/bus-policy.c +++ b/src/core/bus-policy.c @@ -18,11 +18,11 @@ ***/ #include <stdlib.h> +#include <linux/kdbus.h> #include "alloc-util.h" #include "bus-kernel.h" #include "bus-policy.h" -#include "kdbus.h" #include "string-table.h" #include "user-util.h" #include "util.h" diff --git a/src/core/bus-policy.h b/src/core/bus-policy.h index 5b2c4d5953..d8b472c741 100644 --- a/src/core/bus-policy.h +++ b/src/core/bus-policy.h @@ -19,7 +19,8 @@ along with systemd; If not, see <http://www.gnu.org/licenses/>. ***/ -#include "kdbus.h" +#include <linux/kdbus.h> + #include "list.h" #include "macro.h" diff --git a/src/core/busname.c b/src/core/busname.c index 77704a1155..1a3536ee0d 100644 --- a/src/core/busname.c +++ b/src/core/busname.c @@ -17,6 +17,7 @@ along with systemd; If not, see <http://www.gnu.org/licenses/>. ***/ +#include <linux/kdbus.h> #include <sys/mman.h> #include "alloc-util.h" @@ -28,7 +29,6 @@ #include "dbus-busname.h" #include "fd-util.h" #include "formats-util.h" -#include "kdbus.h" #include "parse-util.h" #include "process-util.h" #include "service.h" diff --git a/src/libsystemd/sd-bus/bus-internal.h b/src/libsystemd/sd-bus/bus-internal.h index 216d9f62bc..452b63f93e 100644 --- a/src/libsystemd/sd-bus/bus-internal.h +++ b/src/libsystemd/sd-bus/bus-internal.h @@ -20,6 +20,7 @@ ***/ #include <pthread.h> +#include <linux/kdbus.h> #include <sys/socket.h> #include "sd-bus.h" @@ -28,7 +29,6 @@ #include "bus-kernel.h" #include "bus-match.h" #include "hashmap.h" -#include "kdbus.h" #include "list.h" #include "prioq.h" #include "refcnt.h" diff --git a/src/libsystemd/sd-bus/kdbus.h b/src/libsystemd/sd-bus/kdbus.h deleted file mode 100644 index 4fc44cb1d4..0000000000 --- a/src/libsystemd/sd-bus/kdbus.h +++ /dev/null @@ -1,984 +0,0 @@ -/* - * 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. - */ - -#ifndef _UAPI_KDBUS_H_ -#define _UAPI_KDBUS_H_ - -#include <linux/ioctl.h> -#include <linux/types.h> - -#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) -#define KDBUS_FLAG_NEGOTIATE (1ULL << 63) - -/** - * 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; -} __attribute__((__aligned__(8))); - -/** - * struct kdbus_notify_name_change - name registry change message - * @old_id: ID and flags of former owner of a name - * @new_id: 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_id; - struct kdbus_notify_id_change new_id; - char name[0]; -} __attribute__((__aligned__(8))); - -/** - * struct kdbus_creds - process credentials - * @uid: User ID - * @euid: Effective UID - * @suid: Saved UID - * @fsuid: Filesystem UID - * @gid: Group ID - * @egid: Effective GID - * @sgid: Saved GID - * @fsgid: Filesystem GID - * - * Attached to: - * KDBUS_ITEM_CREDS - */ -struct kdbus_creds { - __u64 uid; - __u64 euid; - __u64 suid; - __u64 fsuid; - __u64 gid; - __u64 egid; - __u64 sgid; - __u64 fsgid; -} __attribute__((__aligned__(8))); - -/** - * struct kdbus_pids - process identifiers - * @pid: Process ID - * @tid: Thread ID - * @ppid: Parent process ID - * - * The PID and TID of a process. - * - * Attached to: - * KDBUS_ITEM_PIDS - */ -struct kdbus_pids { - __u64 pid; - __u64 tid; - __u64 ppid; -} __attribute__((__aligned__(8))); - -/** - * struct kdbus_caps - process capabilities - * @last_cap: Highest currently known capability bit - * @caps: Variable number of 32-bit capabilities flags - * - * Contains a variable number of 32-bit capabilities flags. - * - * Attached to: - * KDBUS_ITEM_CAPS - */ -struct kdbus_caps { - __u32 last_cap; - __u32 caps[0]; -} __attribute__((__aligned__(8))); - -/** - * struct kdbus_audit - audit information - * @sessionid: The audit session ID - * @loginuid: The audit login uid - * - * Attached to: - * KDBUS_ITEM_AUDIT - */ -struct kdbus_audit { - __u32 sessionid; - __u32 loginuid; -} __attribute__((__aligned__(8))); - -/** - * 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; -} __attribute__((__aligned__(8))); - -/** - * struct kdbus_vec - I/O vector for kdbus payload items - * @size: The size of the vector - * @address: Memory address of data buffer - * @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; - }; -} __attribute__((__aligned__(8))); - -/** - * 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; -} __attribute__((__aligned__(8))); - -/** - * 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]; -} __attribute__((__aligned__(8))); - -/** - * struct kdbus_memfd - a kdbus memfd - * @start: The offset into the memfd where the segment starts - * @size: The size of the memfd segment - * @fd: The file descriptor number - * @__pad: Padding to ensure proper alignment and size - * - * Attached to: - * KDBUS_ITEM_PAYLOAD_MEMFD - */ -struct kdbus_memfd { - __u64 start; - __u64 size; - int fd; - __u32 __pad; -} __attribute__((__aligned__(8))); - -/** - * struct kdbus_name - a registered well-known name with its flags - * @flags: Flags from KDBUS_NAME_* - * @name: Well-known name - * - * Attached to: - * KDBUS_ITEM_OWNED_NAME - */ -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, -}; - -/** - * 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 */ -} __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 - * @KDBUS_ITEM_FDS: Attached file descriptors - * @KDBUS_ITEM_CANCEL_FD: FD used to cancel a synchronous - * operation by writing to it from - * userspace - * @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'sbloom filter - * @KDBUS_ITEM_DST_NAME: Destination's well-known name - * @KDBUS_ITEM_MAKE_NAME: Name of domain, bus, endpoint - * @KDBUS_ITEM_ATTACH_FLAGS_SEND: Attach-flags, used for updating which - * metadata a connection opts in to send - * @KDBUS_ITEM_ATTACH_FLAGS_RECV: Attach-flags, used for updating which - * metadata a connection requests to - * receive for each reeceived message - * @KDBUS_ITEM_ID: Connection ID - * @KDBUS_ITEM_NAME: Well-know name with flags - * @_KDBUS_ITEM_ATTACH_BASE: Start of metadata attach items - * @KDBUS_ITEM_TIMESTAMP: Timestamp - * @KDBUS_ITEM_CREDS: Process credentials - * @KDBUS_ITEM_PIDS: Process identifiers - * @KDBUS_ITEM_AUXGROUPS: Auxiliary process groups - * @KDBUS_ITEM_OWNED_NAME: A name owned by the associated - * connection - * @KDBUS_ITEM_TID_COMM: Thread ID "comm" identifier - * (Don't trust this, see below.) - * @KDBUS_ITEM_PID_COMM: Process ID "comm" identifier - * (Don't trust this, see below.) - * @KDBUS_ITEM_EXE: The path of the executable - * (Don't trust this, see below.) - * @KDBUS_ITEM_CMDLINE: The process command line - * (Don't trust this, see below.) - * @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_DESCRIPTION: 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: Notification in kdbus_notify_name_change - * @KDBUS_ITEM_NAME_REMOVE: Notification in kdbus_notify_name_change - * @KDBUS_ITEM_NAME_CHANGE: Notification in kdbus_notify_name_change - * @KDBUS_ITEM_ID_ADD: Notification in kdbus_notify_id_change - * @KDBUS_ITEM_ID_REMOVE: Notification in kdbus_notify_id_change - * @KDBUS_ITEM_REPLY_TIMEOUT: Timeout has been reached - * @KDBUS_ITEM_REPLY_DEAD: Destination died - * - * N.B: The process and thread COMM fields, as well as the CMDLINE and - * EXE fields may be altered by unprivileged processes und should - * hence *not* used for security decisions. Peers should make use of - * these items only for informational purposes, such as generating log - * records. - */ -enum kdbus_item_type { - _KDBUS_ITEM_NULL, - _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, - KDBUS_ITEM_CANCEL_FD, - KDBUS_ITEM_BLOOM_PARAMETER, - KDBUS_ITEM_BLOOM_FILTER, - KDBUS_ITEM_BLOOM_MASK, - KDBUS_ITEM_DST_NAME, - KDBUS_ITEM_MAKE_NAME, - KDBUS_ITEM_ATTACH_FLAGS_SEND, - KDBUS_ITEM_ATTACH_FLAGS_RECV, - KDBUS_ITEM_ID, - KDBUS_ITEM_NAME, - KDBUS_ITEM_DST_ID, - - /* keep these item types in sync with KDBUS_ATTACH_* flags */ - _KDBUS_ITEM_ATTACH_BASE = 0x1000, - KDBUS_ITEM_TIMESTAMP = _KDBUS_ITEM_ATTACH_BASE, - KDBUS_ITEM_CREDS, - KDBUS_ITEM_PIDS, - KDBUS_ITEM_AUXGROUPS, - KDBUS_ITEM_OWNED_NAME, - KDBUS_ITEM_TID_COMM, - KDBUS_ITEM_PID_COMM, - KDBUS_ITEM_EXE, - KDBUS_ITEM_CMDLINE, - KDBUS_ITEM_CGROUP, - KDBUS_ITEM_CAPS, - KDBUS_ITEM_SECLABEL, - KDBUS_ITEM_AUDIT, - KDBUS_ITEM_CONN_DESCRIPTION, - - _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_pids pids; - struct kdbus_audit audit; - struct kdbus_caps caps; - 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; - }; -} __attribute__((__aligned__(8))); - -/** - * enum kdbus_msg_flags - type of message - * @KDBUS_MSG_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_NO_AUTO_START: Do not start a service if the addressed - * name is not currently active. This flag is - * not looked at by the kernel but only - * serves as hint for userspace implementations. - * @KDBUS_MSG_SIGNAL: Treat this message as signal - */ -enum kdbus_msg_flags { - KDBUS_MSG_EXPECT_REPLY = 1ULL << 0, - KDBUS_MSG_NO_AUTO_START = 1ULL << 1, - KDBUS_MSG_SIGNAL = 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" - * - * Any payload-type is accepted. Common types will get added here once - * established. - */ -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_*), userspace → kernel - * @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, and the send command is - * executed asynchronously, a kernel-generated message - * with an attached KDBUS_ITEM_REPLY_TIMEOUT item - * is sent to @src_id. For synchronously executed send - * command, the value denotes the maximum time the call - * blocks to wait for a reply. The timeout is expected in - * nanoseconds and as absolute CLOCK_MONOTONIC value. - * @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 - * @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; - }; - struct kdbus_item items[0]; -} __attribute__((__aligned__(8))); - -/** - * struct kdbus_msg_info - returned message container - * @offset: Offset of kdbus_msg slice in pool - * @msg_size: Copy of the kdbus_msg.size field - * @return_flags: Command return flags, kernel → userspace - */ -struct kdbus_msg_info { - __u64 offset; - __u64 msg_size; - __u64 return_flags; -} __attribute__((__aligned__(8))); - -/** - * enum kdbus_send_flags - flags for sending messages - * @KDBUS_SEND_SYNC_REPLY: Wait for destination connection to - * reply to this message. The - * KDBUS_CMD_SEND ioctl() will block - * until the reply is received, and - * reply in struct kdbus_cmd_send will - * yield the offset in the sender's pool - * where the reply can be found. - * This flag is only valid if - * @KDBUS_MSG_EXPECT_REPLY is set as well. - */ -enum kdbus_send_flags { - KDBUS_SEND_SYNC_REPLY = 1ULL << 0, -}; - -/** - * struct kdbus_cmd_send - send message - * @size: Overall size of this structure - * @flags: Flags to change send behavior (KDBUS_SEND_*) - * @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 - * was given - * @items: Additional items for this command - */ -struct kdbus_cmd_send { - __u64 size; - __u64 flags; - __u64 return_flags; - __u64 msg_address; - struct kdbus_msg_info 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, -}; - -/** - * enum kdbus_recv_return_flags - return flags for message receive commands - * @KDBUS_RECV_RETURN_INCOMPLETE_FDS: One or more file descriptors could not - * be installed. These descriptors in - * KDBUS_ITEM_FDS will carry the value -1. - * @KDBUS_RECV_RETURN_DROPPED_MSGS: There have been dropped messages since - * the last time a message was received. - * The 'dropped_msgs' counter contains the - * number of messages dropped pool - * overflows or other missed broadcasts. - */ -enum kdbus_recv_return_flags { - KDBUS_RECV_RETURN_INCOMPLETE_FDS = 1ULL << 0, - KDBUS_RECV_RETURN_DROPPED_MSGS = 1ULL << 1, -}; - -/** - * struct kdbus_cmd_recv - struct to de-queue a buffered message - * @size: Overall size of this object - * @flags: KDBUS_RECV_* flags, userspace → kernel - * @return_flags: Command return flags, kernel → userspace - * @priority: Minimum priority of the messages to de-queue. Lowest - * values have the highest priority. - * @dropped_msgs: In case there were any dropped messages since the last - * time a message was received, this will be set to the - * number of lost messages and - * KDBUS_RECV_RETURN_DROPPED_MSGS will be set in - * 'return_flags'. This can only happen if the ioctl - * returns 0 or EAGAIN. - * @msg: Return storage for received message. - * @items: Additional items for this command. - * - * This struct is used with the KDBUS_CMD_RECV ioctl. - */ -struct kdbus_cmd_recv { - __u64 size; - __u64 flags; - __u64 return_flags; - __s64 priority; - __u64 dropped_msgs; - struct kdbus_msg_info msg; - struct kdbus_item items[0]; -} __attribute__((__aligned__(8))); - -/** - * struct kdbus_cmd_free - struct to free a slice of memory in the pool - * @size: Overall size of this structure - * @flags: Flags for the free command, userspace → kernel - * @return_flags: Command return flags, kernel → userspace - * @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 flags; - __u64 return_flags; - __u64 offset; - struct kdbus_item items[0]; -} __attribute__((__aligned__(8))); - -/** - * enum kdbus_hello_flags - flags for struct kdbus_cmd_hello - * @KDBUS_HELLO_ACCEPT_FD: The connection allows the reception 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 acquire 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, -}; - -/** - * struct kdbus_cmd_hello - struct to say hello to kdbus - * @size: The total size of the structure - * @flags: Connection flags (KDBUS_HELLO_*), userspace → kernel - * @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_*) - * @attach_flags_recv: Mask of metadata to attach to each message receieved - * by the new connection (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 - * @offset: Pool offset where items are returned to report - * additional information about the bus and the newly - * created connection. - * @items_size: Size of buffer returned in the pool slice at @offset. - * @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 flags; - __u64 return_flags; - __u64 attach_flags_send; - __u64 attach_flags_recv; - __u64 bus_flags; - __u64 id; - __u64 pool_size; - __u64 offset; - __u64 items_size; - __u8 id128[16]; - struct kdbus_item items[0]; -} __attribute__((__aligned__(8))); - -/** - * 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_info { - __u64 size; - __u64 id; - __u64 flags; - struct kdbus_item items[0]; -} __attribute__((__aligned__(8))); - -/** - * 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_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_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: size of returned list in bytes - * @items: Items for the command. Reserved for future use. - * - * This structure is used with the KDBUS_CMD_LIST ioctl. - */ -struct kdbus_cmd_list { - __u64 size; - __u64 flags; - __u64 return_flags; - __u64 offset; - __u64 list_size; - 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: Flags for this ioctl, userspace → kernel - * @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 - * determine the ID in this case. - * @attach_flags: Set of attach flags to specify the set of information - * to receive, userspace → kernel - * @offset: Returned offset in the caller's pool buffer where the - * kdbus_info struct result is stored. The user must - * use KDBUS_CMD_FREE to free the allocated memory. - * @info_size: Output buffer to report size of data at @offset. - * @items: The optional item list, containing the - * well-known name to look up as a KDBUS_ITEM_NAME. - * 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_info. - */ -struct kdbus_cmd_info { - __u64 size; - __u64 flags; - __u64 return_flags; - __u64 id; - __u64 attach_flags; - __u64 offset; - __u64 info_size; - struct kdbus_item items[0]; -} __attribute__((__aligned__(8))); - -/** - * enum kdbus_cmd_match_flags - flags to control the KDBUS_CMD_MATCH_ADD ioctl - * @KDBUS_MATCH_REPLACE: If entries with the supplied cookie already - * exists, remove them before installing the new - * matches. - */ -enum kdbus_cmd_match_flags { - KDBUS_MATCH_REPLACE = 1ULL << 0, -}; - -/** - * struct kdbus_cmd_match - struct to add or remove matches - * @size: The total size of the struct - * @flags: Flags for match command (KDBUS_MATCH_*), - * userspace → kernel - * @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 - * KDBUS_CMD_MATCH_REMOVE ioctl. - */ -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 - * @KDBUS_NAME_PRIMARY: Primary owner of the name - * @KDBUS_NAME_ACQUIRED: Name was acquired/queued _now_ - */ -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, - KDBUS_NAME_PRIMARY = 1ULL << 5, - KDBUS_NAME_ACQUIRED = 1ULL << 6, -}; - -/** - * 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 return_flags; - struct kdbus_item items[0]; -} __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_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_LIST: Retrieve the list of all currently registered - * well-known and unique names. - * - * 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), - - /* endpoint owner (10-1f) */ - KDBUS_CMD_ENDPOINT_MAKE = _IOW(KDBUS_IOCTL_MAGIC, 0x10, - struct kdbus_cmd), - KDBUS_CMD_ENDPOINT_UPDATE = _IOW(KDBUS_IOCTL_MAGIC, 0x11, - struct kdbus_cmd), - - /* connection owner (80-ff) */ - KDBUS_CMD_HELLO = _IOWR(KDBUS_IOCTL_MAGIC, 0x80, - struct kdbus_cmd_hello), - 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_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, 0xb1, - struct kdbus_cmd_match), -}; - -#endif /* _UAPI_KDBUS_H_ */ |