virt: Add vboxguest driver for Virtual Box Guest integration UAPI

This commit adds the headers describing the ioctl API for the
/dev/vboxguest device used by the Virtual Box Guest Additions
in Virtual Box virtual machines.

The driver providing the /dev/vboxguest device will allow Virtual Box
Guest Additions features such as copy-and-paste, seamless mode and
OpenGL pass-through.

Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Reviewed-by: Larry Finger <Larry.Finger@lwfinger.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

MAINTAINERS

@@ -14557,6 +14557,13 @@ S:	Maintained
 F:	drivers/virtio/virtio_input.c
 F:	include/uapi/linux/virtio_input.h
 
+VIRTUAL BOX GUEST DEVICE DRIVER
+M:	Hans de Goede <hdegoede@redhat.com>
+M:	Arnd Bergmann <arnd@arndb.de>
+M:	Greg Kroah-Hartman <gregkh@linuxfoundation.org>
+S:	Maintained
+F:	include/uapi/linux/vbox*.h
+
 VIRTUAL SERIO DEVICE DRIVER
 M:	Stephen Chandler Paul <thatslyude@gmail.com>
 S:	Maintained

include/uapi/linux/vbox_err.h

@@ -0,0 +1,151 @@
+/* SPDX-License-Identifier: MIT */
+/* Copyright (C) 2017 Oracle Corporation */
+
+#ifndef __UAPI_VBOX_ERR_H__
+#define __UAPI_VBOX_ERR_H__
+
+#define VINF_SUCCESS                        0
+#define VERR_GENERAL_FAILURE                (-1)
+#define VERR_INVALID_PARAMETER              (-2)
+#define VERR_INVALID_MAGIC                  (-3)
+#define VERR_INVALID_HANDLE                 (-4)
+#define VERR_LOCK_FAILED                    (-5)
+#define VERR_INVALID_POINTER                (-6)
+#define VERR_IDT_FAILED                     (-7)
+#define VERR_NO_MEMORY                      (-8)
+#define VERR_ALREADY_LOADED                 (-9)
+#define VERR_PERMISSION_DENIED              (-10)
+#define VERR_VERSION_MISMATCH               (-11)
+#define VERR_NOT_IMPLEMENTED                (-12)
+#define VERR_INVALID_FLAGS                  (-13)
+
+#define VERR_NOT_EQUAL                      (-18)
+#define VERR_NOT_SYMLINK                    (-19)
+#define VERR_NO_TMP_MEMORY                  (-20)
+#define VERR_INVALID_FMODE                  (-21)
+#define VERR_WRONG_ORDER                    (-22)
+#define VERR_NO_TLS_FOR_SELF                (-23)
+#define VERR_FAILED_TO_SET_SELF_TLS         (-24)
+#define VERR_NO_CONT_MEMORY                 (-26)
+#define VERR_NO_PAGE_MEMORY                 (-27)
+#define VERR_THREAD_IS_DEAD                 (-29)
+#define VERR_THREAD_NOT_WAITABLE            (-30)
+#define VERR_PAGE_TABLE_NOT_PRESENT         (-31)
+#define VERR_INVALID_CONTEXT                (-32)
+#define VERR_TIMER_BUSY                     (-33)
+#define VERR_ADDRESS_CONFLICT               (-34)
+#define VERR_UNRESOLVED_ERROR               (-35)
+#define VERR_INVALID_FUNCTION               (-36)
+#define VERR_NOT_SUPPORTED                  (-37)
+#define VERR_ACCESS_DENIED                  (-38)
+#define VERR_INTERRUPTED                    (-39)
+#define VERR_TIMEOUT                        (-40)
+#define VERR_BUFFER_OVERFLOW                (-41)
+#define VERR_TOO_MUCH_DATA                  (-42)
+#define VERR_MAX_THRDS_REACHED              (-43)
+#define VERR_MAX_PROCS_REACHED              (-44)
+#define VERR_SIGNAL_REFUSED                 (-45)
+#define VERR_SIGNAL_PENDING                 (-46)
+#define VERR_SIGNAL_INVALID                 (-47)
+#define VERR_STATE_CHANGED                  (-48)
+#define VERR_INVALID_UUID_FORMAT            (-49)
+#define VERR_PROCESS_NOT_FOUND              (-50)
+#define VERR_PROCESS_RUNNING                (-51)
+#define VERR_TRY_AGAIN                      (-52)
+#define VERR_PARSE_ERROR                    (-53)
+#define VERR_OUT_OF_RANGE                   (-54)
+#define VERR_NUMBER_TOO_BIG                 (-55)
+#define VERR_NO_DIGITS                      (-56)
+#define VERR_NEGATIVE_UNSIGNED              (-57)
+#define VERR_NO_TRANSLATION                 (-58)
+
+#define VERR_NOT_FOUND                      (-78)
+#define VERR_INVALID_STATE                  (-79)
+#define VERR_OUT_OF_RESOURCES               (-80)
+
+#define VERR_FILE_NOT_FOUND                 (-102)
+#define VERR_PATH_NOT_FOUND                 (-103)
+#define VERR_INVALID_NAME                   (-104)
+#define VERR_ALREADY_EXISTS                 (-105)
+#define VERR_TOO_MANY_OPEN_FILES            (-106)
+#define VERR_SEEK                           (-107)
+#define VERR_NEGATIVE_SEEK                  (-108)
+#define VERR_SEEK_ON_DEVICE                 (-109)
+#define VERR_EOF                            (-110)
+#define VERR_READ_ERROR                     (-111)
+#define VERR_WRITE_ERROR                    (-112)
+#define VERR_WRITE_PROTECT                  (-113)
+#define VERR_SHARING_VIOLATION              (-114)
+#define VERR_FILE_LOCK_FAILED               (-115)
+#define VERR_FILE_LOCK_VIOLATION            (-116)
+#define VERR_CANT_CREATE                    (-117)
+#define VERR_CANT_DELETE_DIRECTORY          (-118)
+#define VERR_NOT_SAME_DEVICE                (-119)
+#define VERR_FILENAME_TOO_LONG              (-120)
+#define VERR_MEDIA_NOT_PRESENT              (-121)
+#define VERR_MEDIA_NOT_RECOGNIZED           (-122)
+#define VERR_FILE_NOT_LOCKED                (-123)
+#define VERR_FILE_LOCK_LOST                 (-124)
+#define VERR_DIR_NOT_EMPTY                  (-125)
+#define VERR_NOT_A_DIRECTORY                (-126)
+#define VERR_IS_A_DIRECTORY                 (-127)
+#define VERR_FILE_TOO_BIG                   (-128)
+
+#define VERR_NET_IO_ERROR                       (-400)
+#define VERR_NET_OUT_OF_RESOURCES               (-401)
+#define VERR_NET_HOST_NOT_FOUND                 (-402)
+#define VERR_NET_PATH_NOT_FOUND                 (-403)
+#define VERR_NET_PRINT_ERROR                    (-404)
+#define VERR_NET_NO_NETWORK                     (-405)
+#define VERR_NET_NOT_UNIQUE_NAME                (-406)
+
+#define VERR_NET_IN_PROGRESS                    (-436)
+#define VERR_NET_ALREADY_IN_PROGRESS            (-437)
+#define VERR_NET_NOT_SOCKET                     (-438)
+#define VERR_NET_DEST_ADDRESS_REQUIRED          (-439)
+#define VERR_NET_MSG_SIZE                       (-440)
+#define VERR_NET_PROTOCOL_TYPE                  (-441)
+#define VERR_NET_PROTOCOL_NOT_AVAILABLE         (-442)
+#define VERR_NET_PROTOCOL_NOT_SUPPORTED         (-443)
+#define VERR_NET_SOCKET_TYPE_NOT_SUPPORTED      (-444)
+#define VERR_NET_OPERATION_NOT_SUPPORTED        (-445)
+#define VERR_NET_PROTOCOL_FAMILY_NOT_SUPPORTED  (-446)
+#define VERR_NET_ADDRESS_FAMILY_NOT_SUPPORTED   (-447)
+#define VERR_NET_ADDRESS_IN_USE                 (-448)
+#define VERR_NET_ADDRESS_NOT_AVAILABLE          (-449)
+#define VERR_NET_DOWN                           (-450)
+#define VERR_NET_UNREACHABLE                    (-451)
+#define VERR_NET_CONNECTION_RESET               (-452)
+#define VERR_NET_CONNECTION_ABORTED             (-453)
+#define VERR_NET_CONNECTION_RESET_BY_PEER       (-454)
+#define VERR_NET_NO_BUFFER_SPACE                (-455)
+#define VERR_NET_ALREADY_CONNECTED              (-456)
+#define VERR_NET_NOT_CONNECTED                  (-457)
+#define VERR_NET_SHUTDOWN                       (-458)
+#define VERR_NET_TOO_MANY_REFERENCES            (-459)
+#define VERR_NET_CONNECTION_TIMED_OUT           (-460)
+#define VERR_NET_CONNECTION_REFUSED             (-461)
+#define VERR_NET_HOST_DOWN                      (-464)
+#define VERR_NET_HOST_UNREACHABLE               (-465)
+#define VERR_NET_PROTOCOL_ERROR                 (-466)
+#define VERR_NET_INCOMPLETE_TX_PACKET           (-467)
+
+/* misc. unsorted codes */
+#define VERR_RESOURCE_BUSY                      (-138)
+#define VERR_DISK_FULL                          (-152)
+#define VERR_TOO_MANY_SYMLINKS                  (-156)
+#define VERR_NO_MORE_FILES                      (-201)
+#define VERR_INTERNAL_ERROR                     (-225)
+#define VERR_INTERNAL_ERROR_2                   (-226)
+#define VERR_INTERNAL_ERROR_3                   (-227)
+#define VERR_INTERNAL_ERROR_4                   (-228)
+#define VERR_DEV_IO_ERROR                       (-250)
+#define VERR_IO_BAD_LENGTH                      (-255)
+#define VERR_BROKEN_PIPE                        (-301)
+#define VERR_NO_DATA                            (-304)
+#define VERR_SEM_DESTROYED                      (-363)
+#define VERR_DEADLOCK                           (-365)
+#define VERR_BAD_EXE_FORMAT                     (-608)
+#define VINF_HGCM_ASYNC_EXECUTE                 (2903)
+
+#endif

include/uapi/linux/vbox_vmmdev_types.h

@@ -0,0 +1,226 @@
+/* SPDX-License-Identifier: (GPL-2.0 OR CDDL-1.0) */
+/*
+ * Virtual Device for Guest <-> VMM/Host communication, type definitions
+ * which are also used for the vboxguest ioctl interface / by vboxsf
+ *
+ * Copyright (C) 2006-2016 Oracle Corporation
+ */
+
+#ifndef __UAPI_VBOX_VMMDEV_TYPES_H__
+#define __UAPI_VBOX_VMMDEV_TYPES_H__
+
+#include <asm/bitsperlong.h>
+#include <linux/types.h>
+
+/*
+ * We cannot use linux' compiletime_assert here because it expects to be used
+ * inside a function only. Use a typedef to a char array with a negative size.
+ */
+#define VMMDEV_ASSERT_SIZE(type, size) \
+	typedef char type ## _asrt_size[1 - 2*!!(sizeof(struct type) != (size))]
+
+/** enum vmmdev_request_type - VMMDev request types. */
+enum vmmdev_request_type {
+	VMMDEVREQ_INVALID_REQUEST              =  0,
+	VMMDEVREQ_GET_MOUSE_STATUS             =  1,
+	VMMDEVREQ_SET_MOUSE_STATUS             =  2,
+	VMMDEVREQ_SET_POINTER_SHAPE            =  3,
+	VMMDEVREQ_GET_HOST_VERSION             =  4,
+	VMMDEVREQ_IDLE                         =  5,
+	VMMDEVREQ_GET_HOST_TIME                = 10,
+	VMMDEVREQ_GET_HYPERVISOR_INFO          = 20,
+	VMMDEVREQ_SET_HYPERVISOR_INFO          = 21,
+	VMMDEVREQ_REGISTER_PATCH_MEMORY        = 22, /* since version 3.0.6 */
+	VMMDEVREQ_DEREGISTER_PATCH_MEMORY      = 23, /* since version 3.0.6 */
+	VMMDEVREQ_SET_POWER_STATUS             = 30,
+	VMMDEVREQ_ACKNOWLEDGE_EVENTS           = 41,
+	VMMDEVREQ_CTL_GUEST_FILTER_MASK        = 42,
+	VMMDEVREQ_REPORT_GUEST_INFO            = 50,
+	VMMDEVREQ_REPORT_GUEST_INFO2           = 58, /* since version 3.2.0 */
+	VMMDEVREQ_REPORT_GUEST_STATUS          = 59, /* since version 3.2.8 */
+	VMMDEVREQ_REPORT_GUEST_USER_STATE      = 74, /* since version 4.3 */
+	/* Retrieve a display resize request sent by the host, deprecated. */
+	VMMDEVREQ_GET_DISPLAY_CHANGE_REQ       = 51,
+	VMMDEVREQ_VIDEMODE_SUPPORTED           = 52,
+	VMMDEVREQ_GET_HEIGHT_REDUCTION         = 53,
+	/**
+	 * @VMMDEVREQ_GET_DISPLAY_CHANGE_REQ2:
+	 * Retrieve a display resize request sent by the host.
+	 *
+	 * Queries a display resize request sent from the host.  If the
+	 * event_ack member is sent to true and there is an unqueried request
+	 * available for one of the virtual display then that request will
+	 * be returned.  If several displays have unqueried requests the lowest
+	 * numbered display will be chosen first.  Only the most recent unseen
+	 * request for each display is remembered.
+	 * If event_ack is set to false, the last host request queried with
+	 * event_ack set is resent, or failing that the most recent received
+	 * from the host.  If no host request was ever received then all zeros
+	 * are returned.
+	 */
+	VMMDEVREQ_GET_DISPLAY_CHANGE_REQ2      = 54,
+	VMMDEVREQ_REPORT_GUEST_CAPABILITIES    = 55,
+	VMMDEVREQ_SET_GUEST_CAPABILITIES       = 56,
+	VMMDEVREQ_VIDEMODE_SUPPORTED2          = 57, /* since version 3.2.0 */
+	VMMDEVREQ_GET_DISPLAY_CHANGE_REQEX     = 80, /* since version 4.2.4 */
+	VMMDEVREQ_HGCM_CONNECT                 = 60,
+	VMMDEVREQ_HGCM_DISCONNECT              = 61,
+	VMMDEVREQ_HGCM_CALL32                  = 62,
+	VMMDEVREQ_HGCM_CALL64                  = 63,
+	VMMDEVREQ_HGCM_CANCEL                  = 64,
+	VMMDEVREQ_HGCM_CANCEL2                 = 65,
+	VMMDEVREQ_VIDEO_ACCEL_ENABLE           = 70,
+	VMMDEVREQ_VIDEO_ACCEL_FLUSH            = 71,
+	VMMDEVREQ_VIDEO_SET_VISIBLE_REGION     = 72,
+	VMMDEVREQ_GET_SEAMLESS_CHANGE_REQ      = 73,
+	VMMDEVREQ_QUERY_CREDENTIALS            = 100,
+	VMMDEVREQ_REPORT_CREDENTIALS_JUDGEMENT = 101,
+	VMMDEVREQ_REPORT_GUEST_STATS           = 110,
+	VMMDEVREQ_GET_MEMBALLOON_CHANGE_REQ    = 111,
+	VMMDEVREQ_GET_STATISTICS_CHANGE_REQ    = 112,
+	VMMDEVREQ_CHANGE_MEMBALLOON            = 113,
+	VMMDEVREQ_GET_VRDPCHANGE_REQ           = 150,
+	VMMDEVREQ_LOG_STRING                   = 200,
+	VMMDEVREQ_GET_CPU_HOTPLUG_REQ          = 210,
+	VMMDEVREQ_SET_CPU_HOTPLUG_STATUS       = 211,
+	VMMDEVREQ_REGISTER_SHARED_MODULE       = 212,
+	VMMDEVREQ_UNREGISTER_SHARED_MODULE     = 213,
+	VMMDEVREQ_CHECK_SHARED_MODULES         = 214,
+	VMMDEVREQ_GET_PAGE_SHARING_STATUS      = 215,
+	VMMDEVREQ_DEBUG_IS_PAGE_SHARED         = 216,
+	VMMDEVREQ_GET_SESSION_ID               = 217, /* since version 3.2.8 */
+	VMMDEVREQ_WRITE_COREDUMP               = 218,
+	VMMDEVREQ_GUEST_HEARTBEAT              = 219,
+	VMMDEVREQ_HEARTBEAT_CONFIGURE          = 220,
+	/* Ensure the enum is a 32 bit data-type */
+	VMMDEVREQ_SIZEHACK                     = 0x7fffffff
+};
+
+#if __BITS_PER_LONG == 64
+#define VMMDEVREQ_HGCM_CALL VMMDEVREQ_HGCM_CALL64
+#else
+#define VMMDEVREQ_HGCM_CALL VMMDEVREQ_HGCM_CALL32
+#endif
+
+/** HGCM service location types. */
+enum vmmdev_hgcm_service_location_type {
+	VMMDEV_HGCM_LOC_INVALID    = 0,
+	VMMDEV_HGCM_LOC_LOCALHOST  = 1,
+	VMMDEV_HGCM_LOC_LOCALHOST_EXISTING = 2,
+	/* Ensure the enum is a 32 bit data-type */
+	VMMDEV_HGCM_LOC_SIZEHACK   = 0x7fffffff
+};
+
+/** HGCM host service location. */
+struct vmmdev_hgcm_service_location_localhost {
+	/** Service name */
+	char service_name[128];
+};
+VMMDEV_ASSERT_SIZE(vmmdev_hgcm_service_location_localhost, 128);
+
+/** HGCM service location. */
+struct vmmdev_hgcm_service_location {
+	/** Type of the location. */
+	enum vmmdev_hgcm_service_location_type type;
+
+	union {
+		struct vmmdev_hgcm_service_location_localhost localhost;
+	} u;
+};
+VMMDEV_ASSERT_SIZE(vmmdev_hgcm_service_location, 128 + 4);
+
+/** HGCM function parameter type. */
+enum vmmdev_hgcm_function_parameter_type {
+	VMMDEV_HGCM_PARM_TYPE_INVALID            = 0,
+	VMMDEV_HGCM_PARM_TYPE_32BIT              = 1,
+	VMMDEV_HGCM_PARM_TYPE_64BIT              = 2,
+	/** Deprecated Doesn't work, use PAGELIST. */
+	VMMDEV_HGCM_PARM_TYPE_PHYSADDR           = 3,
+	/** In and Out, user-memory */
+	VMMDEV_HGCM_PARM_TYPE_LINADDR            = 4,
+	/** In, user-memory  (read;  host<-guest) */
+	VMMDEV_HGCM_PARM_TYPE_LINADDR_IN         = 5,
+	/** Out, user-memory (write; host->guest) */
+	VMMDEV_HGCM_PARM_TYPE_LINADDR_OUT        = 6,
+	/** In and Out, kernel-memory */
+	VMMDEV_HGCM_PARM_TYPE_LINADDR_KERNEL     = 7,
+	/** In, kernel-memory  (read;  host<-guest) */
+	VMMDEV_HGCM_PARM_TYPE_LINADDR_KERNEL_IN  = 8,
+	/** Out, kernel-memory (write; host->guest) */
+	VMMDEV_HGCM_PARM_TYPE_LINADDR_KERNEL_OUT = 9,
+	/** Physical addresses of locked pages for a buffer. */
+	VMMDEV_HGCM_PARM_TYPE_PAGELIST           = 10,
+	/* Ensure the enum is a 32 bit data-type */
+	VMMDEV_HGCM_PARM_TYPE_SIZEHACK           = 0x7fffffff
+};
+
+/** HGCM function parameter, 32-bit client. */
+struct vmmdev_hgcm_function_parameter32 {
+	enum vmmdev_hgcm_function_parameter_type type;
+	union {
+		__u32 value32;
+		__u64 value64;
+		struct {
+			__u32 size;
+			union {
+				__u32 phys_addr;
+				__u32 linear_addr;
+			} u;
+		} pointer;
+		struct {
+			/** Size of the buffer described by the page list. */
+			__u32 size;
+			/** Relative to the request header. */
+			__u32 offset;
+		} page_list;
+	} u;
+} __packed;
+VMMDEV_ASSERT_SIZE(vmmdev_hgcm_function_parameter32, 4 + 8);
+
+/** HGCM function parameter, 64-bit client. */
+struct vmmdev_hgcm_function_parameter64 {
+	enum vmmdev_hgcm_function_parameter_type type;
+	union {
+		__u32 value32;
+		__u64 value64;
+		struct {
+			__u32 size;
+			union {
+				__u64 phys_addr;
+				__u64 linear_addr;
+			} u;
+		} __packed pointer;
+		struct {
+			/** Size of the buffer described by the page list. */
+			__u32 size;
+			/** Relative to the request header. */
+			__u32 offset;
+		} page_list;
+	} __packed u;
+} __packed;
+VMMDEV_ASSERT_SIZE(vmmdev_hgcm_function_parameter64, 4 + 12);
+
+#if __BITS_PER_LONG == 64
+#define vmmdev_hgcm_function_parameter vmmdev_hgcm_function_parameter64
+#else
+#define vmmdev_hgcm_function_parameter vmmdev_hgcm_function_parameter32
+#endif
+
+#define VMMDEV_HGCM_F_PARM_DIRECTION_NONE      0x00000000U
+#define VMMDEV_HGCM_F_PARM_DIRECTION_TO_HOST   0x00000001U
+#define VMMDEV_HGCM_F_PARM_DIRECTION_FROM_HOST 0x00000002U
+#define VMMDEV_HGCM_F_PARM_DIRECTION_BOTH      0x00000003U
+
+/**
+ * struct vmmdev_hgcm_pagelist - VMMDEV_HGCM_PARM_TYPE_PAGELIST parameters
+ * point to this structure to actually describe the buffer.
+ */
+struct vmmdev_hgcm_pagelist {
+	__u32 flags;             /** VMMDEV_HGCM_F_PARM_*. */
+	__u16 offset_first_page; /** Data offset in the first page. */
+	__u16 page_count;        /** Number of pages. */
+	__u64 pages[1];          /** Page addresses. */
+};
+VMMDEV_ASSERT_SIZE(vmmdev_hgcm_pagelist, 4 + 2 + 2 + 8);
+
+#endif

include/uapi/linux/vboxguest.h

@@ -0,0 +1,330 @@
+/* SPDX-License-Identifier: (GPL-2.0 OR CDDL-1.0) */
+/*
+ * VBoxGuest - VirtualBox Guest Additions Driver Interface.
+ *
+ * Copyright (C) 2006-2016 Oracle Corporation
+ */
+
+#ifndef __UAPI_VBOXGUEST_H__
+#define __UAPI_VBOXGUEST_H__
+
+#include <asm/bitsperlong.h>
+#include <linux/ioctl.h>
+#include <linux/vbox_err.h>
+#include <linux/vbox_vmmdev_types.h>
+
+/* Version of vbg_ioctl_hdr structure. */
+#define VBG_IOCTL_HDR_VERSION		0x10001
+/* Default request type.  Use this for non-VMMDev requests. */
+#define VBG_IOCTL_HDR_TYPE_DEFAULT		0
+
+/**
+ * Common ioctl header.
+ *
+ * This is a mirror of vmmdev_request_header to prevent duplicating data and
+ * needing to verify things multiple times.
+ */
+struct vbg_ioctl_hdr {
+	/** IN: The request input size, and output size if size_out is zero. */
+	__u32 size_in;
+	/** IN: Structure version (VBG_IOCTL_HDR_VERSION) */
+	__u32 version;
+	/** IN: The VMMDev request type or VBG_IOCTL_HDR_TYPE_DEFAULT. */
+	__u32 type;
+	/**
+	 * OUT: The VBox status code of the operation, out direction only.
+	 * This is a VINF_ or VERR_ value as defined in vbox_err.h.
+	 */
+	__s32 rc;
+	/** IN: Output size. Set to zero to use size_in as output size. */
+	__u32 size_out;
+	/** Reserved, MBZ. */
+	__u32 reserved;
+};
+VMMDEV_ASSERT_SIZE(vbg_ioctl_hdr, 24);
+
+
+/*
+ * The VBoxGuest I/O control version.
+ *
+ * As usual, the high word contains the major version and changes to it
+ * signifies incompatible changes.
+ *
+ * The lower word is the minor version number, it is increased when new
+ * functions are added or existing changed in a backwards compatible manner.
+ */
+#define VBG_IOC_VERSION		0x00010000u
+
+/**
+ * VBG_IOCTL_DRIVER_VERSION_INFO data structure
+ *
+ * Note VBG_IOCTL_DRIVER_VERSION_INFO may switch the session to a backwards
+ * compatible interface version if uClientVersion indicates older client code.
+ */
+struct vbg_ioctl_driver_version_info {
+	/** The header. */
+	struct vbg_ioctl_hdr hdr;
+	union {
+		struct {
+			/** Requested interface version (VBG_IOC_VERSION). */
+			__u32 req_version;
+			/**
+			 * Minimum interface version number (typically the
+			 * major version part of VBG_IOC_VERSION).
+			 */
+			__u32 min_version;
+			/** Reserved, MBZ. */
+			__u32 reserved1;
+			/** Reserved, MBZ. */
+			__u32 reserved2;
+		} in;
+		struct {
+			/** Version for this session (typ. VBG_IOC_VERSION). */
+			__u32 session_version;
+			/** Version of the IDC interface (VBG_IOC_VERSION). */
+			__u32 driver_version;
+			/** The SVN revision of the driver, or 0. */
+			__u32 driver_revision;
+			/** Reserved \#1 (zero until defined). */
+			__u32 reserved1;
+			/** Reserved \#2 (zero until defined). */
+			__u32 reserved2;
+		} out;
+	} u;
+};
+VMMDEV_ASSERT_SIZE(vbg_ioctl_driver_version_info, 24 + 20);
+
+#define VBG_IOCTL_DRIVER_VERSION_INFO \
+	_IOWR('V', 0, struct vbg_ioctl_driver_version_info)
+
+
+/* IOCTL to perform a VMM Device request less than 1KB in size. */
+#define VBG_IOCTL_VMMDEV_REQUEST(s)	_IOC(_IOC_READ | _IOC_WRITE, 'V', 2, s)
+
+
+/* IOCTL to perform a VMM Device request larger then 1KB. */
+#define VBG_IOCTL_VMMDEV_REQUEST_BIG	_IOC(_IOC_READ | _IOC_WRITE, 'V', 3, 0)
+
+
+/** VBG_IOCTL_HGCM_CONNECT data structure. */
+struct vbg_ioctl_hgcm_connect {
+	struct vbg_ioctl_hdr hdr;
+	union {
+		struct {
+			struct vmmdev_hgcm_service_location loc;
+		} in;
+		struct {
+			__u32 client_id;
+		} out;
+	} u;
+};
+VMMDEV_ASSERT_SIZE(vbg_ioctl_hgcm_connect, 24 + 132);
+
+#define VBG_IOCTL_HGCM_CONNECT \
+	_IOWR('V', 4, struct vbg_ioctl_hgcm_connect)
+
+
+/** VBG_IOCTL_HGCM_DISCONNECT data structure. */
+struct vbg_ioctl_hgcm_disconnect {
+	struct vbg_ioctl_hdr hdr;
+	union {
+		struct {
+			__u32 client_id;
+		} in;
+	} u;
+};
+VMMDEV_ASSERT_SIZE(vbg_ioctl_hgcm_disconnect, 24 + 4);
+
+#define VBG_IOCTL_HGCM_DISCONNECT \
+	_IOWR('V', 5, struct vbg_ioctl_hgcm_disconnect)
+
+
+/** VBG_IOCTL_HGCM_CALL data structure. */
+struct vbg_ioctl_hgcm_call {
+	/** The header. */
+	struct vbg_ioctl_hdr hdr;
+	/** Input: The id of the caller. */
+	__u32 client_id;
+	/** Input: Function number. */
+	__u32 function;
+	/**
+	 * Input: How long to wait (milliseconds) for completion before
+	 * cancelling the call. Set to -1 to wait indefinitely.
+	 */
+	__u32 timeout_ms;
+	/** Interruptable flag, ignored for userspace calls. */
+	__u8 interruptible;
+	/** Explicit padding, MBZ. */
+	__u8 reserved;
+	/**
+	 * Input: How many parameters following this structure.
+	 *
+	 * The parameters are either HGCMFunctionParameter64 or 32,
+	 * depending on whether we're receiving a 64-bit or 32-bit request.
+	 *
+	 * The current maximum is 61 parameters (given a 1KB max request size,
+	 * and a 64-bit parameter size of 16 bytes).
+	 */
+	__u16 parm_count;
+	/*
+	 * Parameters follow in form:
+	 * struct hgcm_function_parameter<32|64> parms[parm_count]
+	 */
+};
+VMMDEV_ASSERT_SIZE(vbg_ioctl_hgcm_call, 24 + 16);
+
+#define VBG_IOCTL_HGCM_CALL_32(s)	_IOC(_IOC_READ | _IOC_WRITE, 'V', 6, s)
+#define VBG_IOCTL_HGCM_CALL_64(s)	_IOC(_IOC_READ | _IOC_WRITE, 'V', 7, s)
+#if __BITS_PER_LONG == 64
+#define VBG_IOCTL_HGCM_CALL(s)		VBG_IOCTL_HGCM_CALL_64(s)
+#else
+#define VBG_IOCTL_HGCM_CALL(s)		VBG_IOCTL_HGCM_CALL_32(s)
+#endif
+
+
+/** VBG_IOCTL_LOG data structure. */
+struct vbg_ioctl_log {
+	/** The header. */
+	struct vbg_ioctl_hdr hdr;
+	union {
+		struct {
+			/**
+			 * The log message, this may be zero terminated. If it
+			 * is not zero terminated then the length is determined
+			 * from the input size.
+			 */
+			char msg[1];
+		} in;
+	} u;
+};
+
+#define VBG_IOCTL_LOG(s)		_IOC(_IOC_READ | _IOC_WRITE, 'V', 9, s)
+
+
+/** VBG_IOCTL_WAIT_FOR_EVENTS data structure. */
+struct vbg_ioctl_wait_for_events {
+	/** The header. */
+	struct vbg_ioctl_hdr hdr;
+	union {
+		struct {
+			/** Timeout in milliseconds. */
+			__u32 timeout_ms;
+			/** Events to wait for. */
+			__u32 events;
+		} in;
+		struct {
+			/** Events that occurred. */
+			__u32 events;
+		} out;
+	} u;
+};
+VMMDEV_ASSERT_SIZE(vbg_ioctl_wait_for_events, 24 + 8);
+
+#define VBG_IOCTL_WAIT_FOR_EVENTS \
+	_IOWR('V', 10, struct vbg_ioctl_wait_for_events)
+
+
+/*
+ * IOCTL to VBoxGuest to interrupt (cancel) any pending
+ * VBG_IOCTL_WAIT_FOR_EVENTS and return.
+ *
+ * Handled inside the vboxguest driver and not seen by the host at all.
+ * After calling this, VBG_IOCTL_WAIT_FOR_EVENTS should no longer be called in
+ * the same session. Any VBOXGUEST_IOCTL_WAITEVENT calls in the same session
+ * done after calling this will directly exit with -EINTR.
+ */
+#define VBG_IOCTL_INTERRUPT_ALL_WAIT_FOR_EVENTS \
+	_IOWR('V', 11, struct vbg_ioctl_hdr)
+
+
+/** VBG_IOCTL_CHANGE_FILTER_MASK data structure. */
+struct vbg_ioctl_change_filter {
+	/** The header. */
+	struct vbg_ioctl_hdr hdr;
+	union {
+		struct {
+			/** Flags to set. */
+			__u32 or_mask;
+			/** Flags to remove. */
+			__u32 not_mask;
+		} in;
+	} u;
+};
+VMMDEV_ASSERT_SIZE(vbg_ioctl_change_filter, 24 + 8);
+
+/* IOCTL to VBoxGuest to control the event filter mask. */
+#define VBG_IOCTL_CHANGE_FILTER_MASK \
+	_IOWR('V', 12, struct vbg_ioctl_change_filter)
+
+
+/** VBG_IOCTL_CHANGE_GUEST_CAPABILITIES data structure. */
+struct vbg_ioctl_set_guest_caps {
+	/** The header. */
+	struct vbg_ioctl_hdr hdr;
+	union {
+		struct {
+			/** Capabilities to set (VMMDEV_GUEST_SUPPORTS_XXX). */
+			__u32 or_mask;
+			/** Capabilities to drop (VMMDEV_GUEST_SUPPORTS_XXX). */
+			__u32 not_mask;
+		} in;
+		struct {
+			/** Capabilities held by the session after the call. */
+			__u32 session_caps;
+			/** Capabilities for all the sessions after the call. */
+			__u32 global_caps;
+		} out;
+	} u;
+};
+VMMDEV_ASSERT_SIZE(vbg_ioctl_set_guest_caps, 24 + 8);
+
+#define VBG_IOCTL_CHANGE_GUEST_CAPABILITIES \
+	_IOWR('V', 14, struct vbg_ioctl_set_guest_caps)
+
+
+/** VBG_IOCTL_CHECK_BALLOON data structure. */
+struct vbg_ioctl_check_balloon {
+	/** The header. */
+	struct vbg_ioctl_hdr hdr;
+	union {
+		struct {
+			/** The size of the balloon in chunks of 1MB. */
+			__u32 balloon_chunks;
+			/**
+			 * false = handled in R0, no further action required.
+			 *  true = allocate balloon memory in R3.
+			 */
+			__u8 handle_in_r3;
+			/** Explicit padding, MBZ. */
+			__u8 padding[3];
+		} out;
+	} u;
+};
+VMMDEV_ASSERT_SIZE(vbg_ioctl_check_balloon, 24 + 8);
+
+/*
+ * IOCTL to check memory ballooning.
+ *
+ * The guest kernel module will ask the host for the current size of the
+ * balloon and adjust the size. Or it will set handle_in_r3 = true and R3 is
+ * responsible for allocating memory and calling VBG_IOCTL_CHANGE_BALLOON.
+ */
+#define VBG_IOCTL_CHECK_BALLOON \
+	_IOWR('V', 17, struct vbg_ioctl_check_balloon)
+
+
+/** VBG_IOCTL_WRITE_CORE_DUMP data structure. */
+struct vbg_ioctl_write_coredump {
+	struct vbg_ioctl_hdr hdr;
+	union {
+		struct {
+			__u32 flags; /** Flags (reserved, MBZ). */
+		} in;
+	} u;
+};
+VMMDEV_ASSERT_SIZE(vbg_ioctl_write_coredump, 24 + 4);
+
+#define VBG_IOCTL_WRITE_CORE_DUMP \
+	_IOWR('V', 19, struct vbg_ioctl_write_coredump)
+
+#endif