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Date: Mon, 27 Nov 2017 13:46:57 -0600
From: Larry Finger <Larry.Finger@...inger.net>
To: Hans de Goede <hdegoede@...hat.com>, Arnd Bergmann <arnd@...db.de>,
Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Cc: Michael Thayer <michael.thayer@...cle.com>,
"Knut St . Osmundsen" <knut.osmundsen@...cle.com>,
Christoph Hellwig <hch@...radead.org>,
linux-kernel@...r.kernel.org
Subject: Re: [PATCH resend v2 2/3] virt: Add vboxguest VMMDEV communication
code
On 11/26/2017 09:12 AM, Hans de Goede wrote:
> This commits adds a header describing the hardware interface for the
> Virtual Box Guest PCI device used in Virtual Box virtual machines and
> utility functions for talking to the Virtual Box hypervisor over this
> interface.
>
> These utility functions will used both by the vboxguest driver for the
> PCI device which offers the /dev/vboxguest ioctl API and by the vboxfs
> driver which offers folder sharing support.
>
> Signed-off-by: Hans de Goede <hdegoede@...hat.com>
Reviewed-by: Larry Finger <Larry.Finger.net>
This patch has only minor defects. Please see the inline comments.
> ---
> Changes in v2:
> -Change all uapi headers to kernel coding style: Drop struct and enum typedefs
> make type and struct-member names all lowercase, enum values all uppercase.
> -Remove unused struct type declarations from some headers (shaving of another
> 1000 lines)
> -Remove or fixup doxygen style comments
> -Get rid of CHECK macros, use a function taking in_ and out_size args instead
> -Some other small codyingstyle fixes
> -Split into multiple patches
> ---
> MAINTAINERS | 2 +
> drivers/virt/vboxguest/vboxguest_utils.c | 811 +++++++++++++++++++++++++++++++
> drivers/virt/vboxguest/vmmdev.h | 460 ++++++++++++++++++
> include/linux/vbox_utils.h | 92 ++++
> 4 files changed, 1365 insertions(+)
> create mode 100644 drivers/virt/vboxguest/vboxguest_utils.c
> create mode 100644 drivers/virt/vboxguest/vmmdev.h
> create mode 100644 include/linux/vbox_utils.h
>
> diff --git a/MAINTAINERS b/MAINTAINERS
> index fe3dc0e9b901..01b30c12c267 100644
> --- a/MAINTAINERS
> +++ b/MAINTAINERS
> @@ -14554,7 +14554,9 @@ M: Hans de Goede <hdegoede@...hat.com>
> M: Arnd Bergmann <arnd@...db.de>
> M: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
> S: Maintained
> +F: include/linux/vbox_utils.h
> F: include/uapi/linux/vbox*.h
> +F: drivers/virt/vboxguest/
>
> VIRTUAL SERIO DEVICE DRIVER
> M: Stephen Chandler Paul <thatslyude@...il.com>
> diff --git a/drivers/virt/vboxguest/vboxguest_utils.c b/drivers/virt/vboxguest/vboxguest_utils.c
> new file mode 100644
> index 000000000000..5e1737d0a4fb
> --- /dev/null
> +++ b/drivers/virt/vboxguest/vboxguest_utils.c
> @@ -0,0 +1,811 @@
> +/*
> + * vboxguest vmm-req and hgcm-call code, VBoxGuestR0LibHGCMInternal.cpp,
> + * VBoxGuestR0LibGenericRequest.cpp and RTErrConvertToErrno.cpp in vbox svn.
> + *
> + * Copyright (C) 2006-2016 Oracle Corporation
> + *
> + * This program is free software; you can redistribute it and/or modify
> + * it under the terms of the GNU General Public License version 2 as
> + * published by the Free Software Foundation.
> + *
> + * The contents of this file may alternatively be used under the terms
> + * of the Common Development and Distribution License Version 1.0
> + * (CDDL) only, in which case the provisions of the CDDL are applicable
> + * instead of those of the GPL.
> + *
> + * You may elect to license modified versions of this file under the
> + * terms and conditions of either the GPL or the CDDL or both.
> + */
> +
> +#include <linux/errno.h>
> +#include <linux/kernel.h>
> +#include <linux/mm.h>
> +#include <linux/module.h>
> +#include <linux/sizes.h>
> +#include <linux/slab.h>
> +#include <linux/uaccess.h>
> +#include <linux/vmalloc.h>
> +#include <linux/vbox_err.h>
> +#include <linux/vbox_utils.h>
> +#include "vboxguest_core.h"
> +
> +/* Get the pointer to the first parameter of a HGCM call request. */
> +#define VMMDEV_HGCM_CALL_PARMS(a) \
> + ((struct vmmdev_hgcm_function_parameter *)( \
> + (u8 *)(a) + sizeof(struct vmmdev_hgcm_call)))
> +
> +/* The max parameter buffer size for a user request. */
> +#define VBG_MAX_HGCM_USER_PARM (24 * SZ_1M)
> +/* The max parameter buffer size for a kernel request. */
> +#define VBG_MAX_HGCM_KERNEL_PARM (16 * SZ_1M)
> +
> +#define VBG_DEBUG_PORT 0x504
> +
> +/* This protects vbg_log_buf and serializes VBG_DEBUG_PORT accesses */
> +static DEFINE_SPINLOCK(vbg_log_lock);
> +static char vbg_log_buf[128];
> +
> +#define VBG_LOG(name, pr_func) \
> +void name(const char *fmt, ...) \
> +{ \
> + unsigned long flags; \
> + va_list args; \
> + int i, count; \
> + \
> + va_start(args, fmt); \
> + spin_lock_irqsave(&vbg_log_lock, flags); \
> + \
> + count = vscnprintf(vbg_log_buf, sizeof(vbg_log_buf), fmt, args);\
> + for (i = 0; i < count; i++) \
> + outb(vbg_log_buf[i], VBG_DEBUG_PORT); \
> + \
> + pr_func("%s", vbg_log_buf); \
> + \
> + spin_unlock_irqrestore(&vbg_log_lock, flags); \
> + va_end(args); \
> +} \
> +EXPORT_SYMBOL(name)
> +
> +VBG_LOG(vbg_info, pr_info);
> +VBG_LOG(vbg_warn, pr_warn);
> +VBG_LOG(vbg_err, pr_err);
> +#if defined(DEBUG) && !defined(CONFIG_DYNAMIC_DEBUG)
> +VBG_LOG(vbg_debug, pr_debug);
> +#endif
> +
> +void *vbg_req_alloc(size_t len, enum vmmdev_request_type req_type)
> +{
> + struct vmmdev_request_header *req;
> +
> + req = kmalloc(len, GFP_KERNEL | __GFP_DMA32);
> + if (!req)
> + return NULL;
> +
> + memset(req, 0xaa, len);
> +
> + req->size = len;
> + req->version = VMMDEV_REQUEST_HEADER_VERSION;
> + req->request_type = req_type;
> + req->rc = VERR_GENERAL_FAILURE;
> + req->reserved1 = 0;
> + req->reserved2 = 0;
> +
> + return req;
> +}
> +
> +/* Note this function returns a VBox status code, not a negative errno!! */
> +int vbg_req_perform(struct vbg_dev *gdev, void *req)
> +{
> + unsigned long phys_req = virt_to_phys(req);
> +
> + outl(phys_req, gdev->io_port + VMMDEV_PORT_OFF_REQUEST);
> + /*
> + * The host changes the request as a result of the outl, make sure
> + * the outl and any reads of the req happen in the correct order.
> + */
> + mb();
> +
> + return ((struct vmmdev_request_header *)req)->rc;
> +}
> +
> +static bool hgcm_req_done(struct vbg_dev *gdev,
> + struct vmmdev_hgcmreq_header *header)
> +{
> + unsigned long flags;
> + bool done;
> +
> + spin_lock_irqsave(&gdev->event_spinlock, flags);
> + done = header->flags & VMMDEV_HGCM_REQ_DONE;
> + spin_unlock_irqrestore(&gdev->event_spinlock, flags);
> +
> + return done;
> +}
> +
> +int vbg_hgcm_connect(struct vbg_dev *gdev,
> + struct vmmdev_hgcm_service_location *loc,
> + u32 *client_id, int *vbox_status)
> +{
> + struct vmmdev_hgcm_connect *hgcm_connect = NULL;
> + int rc;
> +
> + hgcm_connect = vbg_req_alloc(sizeof(*hgcm_connect),
> + VMMDEVREQ_HGCM_CONNECT);
> + if (!hgcm_connect)
> + return -ENOMEM;
> +
> + hgcm_connect->header.flags = 0;
> + memcpy(&hgcm_connect->loc, loc, sizeof(*loc));
> + hgcm_connect->client_id = 0;
> +
> + rc = vbg_req_perform(gdev, hgcm_connect);
> +
> + if (rc == VINF_HGCM_ASYNC_EXECUTE)
> + wait_event(gdev->hgcm_wq,
> + hgcm_req_done(gdev, &hgcm_connect->header));
> +
> + if (rc >= 0) {
> + *client_id = hgcm_connect->client_id;
> + rc = hgcm_connect->header.result;
> + }
> +
> + kfree(hgcm_connect);
> +
> + *vbox_status = rc;
> + return 0;
> +}
> +EXPORT_SYMBOL(vbg_hgcm_connect);
> +
> +int vbg_hgcm_disconnect(struct vbg_dev *gdev, u32 client_id, int *vbox_status)
> +{
> + struct vmmdev_hgcm_disconnect *hgcm_disconnect = NULL;
> + int rc;
> +
> + hgcm_disconnect = vbg_req_alloc(sizeof(*hgcm_disconnect),
> + VMMDEVREQ_HGCM_DISCONNECT);
> + if (!hgcm_disconnect)
> + return -ENOMEM;
> +
> + hgcm_disconnect->header.flags = 0;
> + hgcm_disconnect->client_id = client_id;
> +
> + rc = vbg_req_perform(gdev, hgcm_disconnect);
> +
> + if (rc == VINF_HGCM_ASYNC_EXECUTE)
> + wait_event(gdev->hgcm_wq,
> + hgcm_req_done(gdev, &hgcm_disconnect->header));
> +
> + if (rc >= 0)
> + rc = hgcm_disconnect->header.result;
> +
> + kfree(hgcm_disconnect);
> +
> + *vbox_status = rc;
> + return 0;
> +}
> +EXPORT_SYMBOL(vbg_hgcm_disconnect);
> +
> +static u32 hgcm_call_buf_size_in_pages(void *buf, u32 len)
> +{
> + u32 size = PAGE_ALIGN(len + ((unsigned long)buf & ~PAGE_MASK));
> +
> + return size >> PAGE_SHIFT;
> +}
> +
> +static void hgcm_call_add_pagelist_size(void *buf, u32 len, size_t *extra)
> +{
> + u32 page_count;
> +
> + page_count = hgcm_call_buf_size_in_pages(buf, len);
> + *extra += offsetof(struct vmmdev_hgcm_pagelist, pages[page_count]);
> +}
> +
> +static int hgcm_call_preprocess_linaddr(
> + const struct vmmdev_hgcm_function_parameter *src_parm,
> + void **bounce_buf_ret, size_t *extra)
> +{
> + void *buf, *bounce_buf;
> + bool copy_in;
> + u32 len;
> + int ret;
> +
> + buf = (void *)src_parm->u.pointer.u.linear_addr;
> + len = src_parm->u.pointer.size;
> + copy_in = src_parm->type != VMMDEV_HGCM_PARM_TYPE_LINADDR_OUT;
> +
> + if (len > VBG_MAX_HGCM_USER_PARM)
> + return -E2BIG;
> +
> + bounce_buf = kvmalloc(len, GFP_KERNEL);
> + if (!bounce_buf)
> + return -ENOMEM;
> +
> + if (copy_in) {
> + ret = copy_from_user(bounce_buf, (void __user *)buf, len);
> + if (ret)
> + return -EFAULT;
> + } else {
> + memset(bounce_buf, 0, len);
> + }
> +
> + *bounce_buf_ret = bounce_buf;
> + hgcm_call_add_pagelist_size(bounce_buf, len, extra);
> + return 0;
> +}
> +
> +/**
> + * Preprocesses the HGCM call, validate parameters, alloc bounce buffers and
> + * figure out how much extra storage we need for page lists.
> + * Return: 0 or negative errno value.
> + * @src_parm: Pointer to source function call parameters
> + * @parm_count: Number of function call parameters.
> + * @bounce_bufs_ret: Where to return the allocated bouncebuffer array
> + * @extra: Where to return the extra request space needed for
> + * physical page lists.
> + */
> +static int hgcm_call_preprocess(
> + const struct vmmdev_hgcm_function_parameter *src_parm,
> + u32 parm_count, void ***bounce_bufs_ret, size_t *extra)
> +{
> + void *buf, **bounce_bufs = NULL;
> + u32 i, len;
> + int ret;
> +
> + for (i = 0; i < parm_count; i++, src_parm++) {
> + switch (src_parm->type) {
> + case VMMDEV_HGCM_PARM_TYPE_32BIT:
> + case VMMDEV_HGCM_PARM_TYPE_64BIT:
> + break;
> +
> + case VMMDEV_HGCM_PARM_TYPE_LINADDR:
> + case VMMDEV_HGCM_PARM_TYPE_LINADDR_IN:
> + case VMMDEV_HGCM_PARM_TYPE_LINADDR_OUT:
> + if (!bounce_bufs) {
> + bounce_bufs = kcalloc(parm_count,
> + sizeof(void *),
> + GFP_KERNEL);
> + if (!bounce_bufs)
> + return -ENOMEM;
> +
> + *bounce_bufs_ret = bounce_bufs;
> + }
> +
> + ret = hgcm_call_preprocess_linaddr(src_parm,
> + &bounce_bufs[i],
> + extra);
> + if (ret)
> + return ret;
> +
> + break;
> +
> + case VMMDEV_HGCM_PARM_TYPE_LINADDR_KERNEL:
> + case VMMDEV_HGCM_PARM_TYPE_LINADDR_KERNEL_IN:
> + case VMMDEV_HGCM_PARM_TYPE_LINADDR_KERNEL_OUT:
> + buf = (void *)src_parm->u.pointer.u.linear_addr;
> + len = src_parm->u.pointer.size;
> + if (WARN_ON(len > VBG_MAX_HGCM_KERNEL_PARM))
> + return -E2BIG;
> +
> + hgcm_call_add_pagelist_size(buf, len, extra);
> + break;
> +
> + default:
> + return -EINVAL;
> + }
> + }
> +
> + return 0;
> +}
> +
> +/**
> + * Translates linear address types to page list direction flags.
> + *
> + * Return: page list flags.
> + * @type: The type.
> + */
> +static u32 hgcm_call_linear_addr_type_to_pagelist_flags(
> + enum vmmdev_hgcm_function_parameter_type type)
> +{
> + switch (type) {
> + default:
> + WARN_ON(1);
Do you intend a fall through here? If so, please add a comment to that effect.
> + case VMMDEV_HGCM_PARM_TYPE_LINADDR:
> + case VMMDEV_HGCM_PARM_TYPE_LINADDR_KERNEL:
> + return VMMDEV_HGCM_F_PARM_DIRECTION_BOTH;
> +
> + case VMMDEV_HGCM_PARM_TYPE_LINADDR_IN:
> + case VMMDEV_HGCM_PARM_TYPE_LINADDR_KERNEL_IN:
> + return VMMDEV_HGCM_F_PARM_DIRECTION_TO_HOST;
> +
> + case VMMDEV_HGCM_PARM_TYPE_LINADDR_OUT:
> + case VMMDEV_HGCM_PARM_TYPE_LINADDR_KERNEL_OUT:
> + return VMMDEV_HGCM_F_PARM_DIRECTION_FROM_HOST;
> + }
> +}
> +
> +static void hgcm_call_init_linaddr(struct vmmdev_hgcm_call *call,
> + struct vmmdev_hgcm_function_parameter *dst_parm, void *buf, u32 len,
> + enum vmmdev_hgcm_function_parameter_type type, u32 *off_extra)
> +{
> + struct vmmdev_hgcm_pagelist *dst_pg_lst;
> + struct page *page;
> + bool is_vmalloc;
> + u32 i, page_count;
> +
> + dst_parm->type = type;
> +
> + if (len == 0) {
> + dst_parm->u.pointer.size = 0;
> + dst_parm->u.pointer.u.linear_addr = 0;
> + return;
> + }
> +
> + dst_pg_lst = (void *)call + *off_extra;
> + page_count = hgcm_call_buf_size_in_pages(buf, len);
> + is_vmalloc = is_vmalloc_addr(buf);
> +
> + dst_parm->type = VMMDEV_HGCM_PARM_TYPE_PAGELIST;
> + dst_parm->u.page_list.size = len;
> + dst_parm->u.page_list.offset = *off_extra;
> + dst_pg_lst->flags = hgcm_call_linear_addr_type_to_pagelist_flags(type);
> + dst_pg_lst->offset_first_page = (unsigned long)buf & ~PAGE_MASK;
> + dst_pg_lst->page_count = page_count;
> +
> + for (i = 0; i < page_count; i++) {
> + if (is_vmalloc)
> + page = vmalloc_to_page(buf);
> + else
> + page = virt_to_page(buf);
> +
> + dst_pg_lst->pages[i] = page_to_phys(page);
> + buf += PAGE_SIZE;
> + }
> +
> + *off_extra += offsetof(struct vmmdev_hgcm_pagelist, pages[page_count]);
> +}
> +
> +/**
> + * Initializes the call request that we're sending to the host.
> + * @call: The call to initialize.
> + * @client_id: The client ID of the caller.
> + * @function: The function number of the function to call.
> + * @src_parm: Pointer to source function call parameters.
> + * @parm_count: Number of function call parameters.
> + * @bounce_bufs: The bouncebuffer array.
> + */
> +static void hgcm_call_init_call(
> + struct vmmdev_hgcm_call *call, u32 client_id, u32 function,
> + const struct vmmdev_hgcm_function_parameter *src_parm,
> + u32 parm_count, void **bounce_bufs)
> +{
> + struct vmmdev_hgcm_function_parameter *dst_parm =
> + VMMDEV_HGCM_CALL_PARMS(call);
> + u32 i, off_extra = (uintptr_t)(dst_parm + parm_count) - (uintptr_t)call;
> + void *buf;
> +
> + call->header.flags = 0;
> + call->header.result = VINF_SUCCESS;
> + call->client_id = client_id;
> + call->function = function;
> + call->parm_count = parm_count;
> +
> + for (i = 0; i < parm_count; i++, src_parm++, dst_parm++) {
> + switch (src_parm->type) {
> + case VMMDEV_HGCM_PARM_TYPE_32BIT:
> + case VMMDEV_HGCM_PARM_TYPE_64BIT:
> + *dst_parm = *src_parm;
> + break;
> +
> + case VMMDEV_HGCM_PARM_TYPE_LINADDR:
> + case VMMDEV_HGCM_PARM_TYPE_LINADDR_IN:
> + case VMMDEV_HGCM_PARM_TYPE_LINADDR_OUT:
> + hgcm_call_init_linaddr(call, dst_parm, bounce_bufs[i],
> + src_parm->u.pointer.size,
> + src_parm->type, &off_extra);
> + break;
> +
> + case VMMDEV_HGCM_PARM_TYPE_LINADDR_KERNEL:
> + case VMMDEV_HGCM_PARM_TYPE_LINADDR_KERNEL_IN:
> + case VMMDEV_HGCM_PARM_TYPE_LINADDR_KERNEL_OUT:
> + buf = (void *)src_parm->u.pointer.u.linear_addr;
> + hgcm_call_init_linaddr(call, dst_parm, buf,
> + src_parm->u.pointer.size,
> + src_parm->type, &off_extra);
> + break;
> +
> + default:
> + WARN_ON(1);
> + dst_parm->type = VMMDEV_HGCM_PARM_TYPE_INVALID;
> + }
> + }
> +}
> +
> +/**
> + * Tries to cancel a pending HGCM call.
> + *
> + * Return: VBox status code
> + */
> +static int hgcm_cancel_call(struct vbg_dev *gdev, struct vmmdev_hgcm_call *call)
> +{
> + int rc;
> +
> + /*
> + * We use a pre-allocated request for cancellations, which is
> + * protected by cancel_req_mutex. This means that all cancellations
> + * get serialized, this should be fine since they should be rare.
> + */
> + mutex_lock(&gdev->cancel_req_mutex);
> + gdev->cancel_req->phys_req_to_cancel = virt_to_phys(call);
> + rc = vbg_req_perform(gdev, gdev->cancel_req);
> + mutex_unlock(&gdev->cancel_req_mutex);
> +
> + if (rc == VERR_NOT_IMPLEMENTED) {
> + call->header.flags |= VMMDEV_HGCM_REQ_CANCELLED;
> + call->header.header.request_type = VMMDEVREQ_HGCM_CANCEL;
> +
> + rc = vbg_req_perform(gdev, call);
> + if (rc == VERR_INVALID_PARAMETER)
> + rc = VERR_NOT_FOUND;
> + }
> +
> + if (rc >= 0)
> + call->header.flags |= VMMDEV_HGCM_REQ_CANCELLED;
> +
> + return rc;
> +}
> +
> +/**
> + * Performs the call and completion wait.
> + * Return: 0 or negative errno value.
> + * @gdev: The VBoxGuest device extension.
> + * @call: The call to execute.
> + * @timeout_ms: Timeout in ms.
> + * @leak_it: Where to return the leak it / free it, indicator.
> + * Cancellation fun.
> + */
> +static int vbg_hgcm_do_call(struct vbg_dev *gdev, struct vmmdev_hgcm_call *call,
> + u32 timeout_ms, bool *leak_it)
> +{
> + int rc, cancel_rc, ret;
> + long timeout;
> +
> + *leak_it = false;
> +
> + rc = vbg_req_perform(gdev, call);
> +
> + /*
> + * If the call failed, then pretend success. Upper layers will
> + * interpret the result code in the packet.
> + */
> + if (rc < 0) {
> + call->header.result = rc;
> + return 0;
> + }
> +
> + if (rc != VINF_HGCM_ASYNC_EXECUTE)
> + return 0;
> +
> + /* Host decided to process the request asynchronously, wait for it */
> + if (timeout_ms == U32_MAX)
> + timeout = MAX_SCHEDULE_TIMEOUT;
> + else
> + timeout = msecs_to_jiffies(timeout_ms);
> +
> + timeout = wait_event_interruptible_timeout(
> + gdev->hgcm_wq,
> + hgcm_req_done(gdev, &call->header),
> + timeout);
> +
> + /* timeout > 0 means hgcm_req_done has returned true, so success */
> + if (timeout > 0)
> + return 0;
> +
> + if (timeout == 0)
> + ret = -ETIMEDOUT;
> + else
> + ret = -EINTR;
> +
> + /* Cancel the request */
> + cancel_rc = hgcm_cancel_call(gdev, call);
> + if (cancel_rc >= 0)
> + return ret;
> +
> + /*
> + * Failed to cancel, this should mean that the cancel has lost the
> + * race with normal completion, wait while the host completes it.
> + */
> + if (cancel_rc == VERR_NOT_FOUND || cancel_rc == VERR_SEM_DESTROYED)
> + timeout = msecs_to_jiffies(500);
> + else
> + timeout = msecs_to_jiffies(2000);
> +
> + timeout = wait_event_timeout(gdev->hgcm_wq,
> + hgcm_req_done(gdev, &call->header),
> + timeout);
> +
> + if (WARN_ON(timeout == 0)) {
> + /* We really should never get here */
> + vbg_err("%s: Call timedout and cancellation failed, leaking the request\n",
> + __func__);
> + *leak_it = true;
> + return ret;
> + }
> +
> + /* The call has completed normally after all */
> + return 0;
> +}
> +
> +/**
> + * Copies the result of the call back to the caller info structure and user
> + * buffers.
> + * Return: 0 or negative errno value.
> + * @call: HGCM call request.
> + * @dst_parm: Pointer to function call parameters destination.
> + * @parm_count: Number of function call parameters.
> + * @bounce_bufs: The bouncebuffer array.
> + */
> +static int hgcm_call_copy_back_result(
> + const struct vmmdev_hgcm_call *call,
> + struct vmmdev_hgcm_function_parameter *dst_parm,
> + u32 parm_count, void **bounce_bufs)
> +{
> + const struct vmmdev_hgcm_function_parameter *src_parm =
> + VMMDEV_HGCM_CALL_PARMS(call);
> + void __user *p;
> + int ret;
> + u32 i;
> +
> + /* Copy back parameters. */
> + for (i = 0; i < parm_count; i++, src_parm++, dst_parm++) {
> + switch (dst_parm->type) {
> + case VMMDEV_HGCM_PARM_TYPE_32BIT:
> + case VMMDEV_HGCM_PARM_TYPE_64BIT:
> + *dst_parm = *src_parm;
> + break;
> +
> + case VMMDEV_HGCM_PARM_TYPE_PAGELIST:
> + dst_parm->u.page_list.size = src_parm->u.page_list.size;
> + break;
> +
> + case VMMDEV_HGCM_PARM_TYPE_LINADDR_IN:
> + case VMMDEV_HGCM_PARM_TYPE_LINADDR_KERNEL:
> + case VMMDEV_HGCM_PARM_TYPE_LINADDR_KERNEL_IN:
> + case VMMDEV_HGCM_PARM_TYPE_LINADDR_KERNEL_OUT:
> + dst_parm->u.pointer.size = src_parm->u.pointer.size;
> + break;
> +
> + case VMMDEV_HGCM_PARM_TYPE_LINADDR:
> + case VMMDEV_HGCM_PARM_TYPE_LINADDR_OUT:
> + dst_parm->u.pointer.size = src_parm->u.pointer.size;
> +
> + p = (void __user *)dst_parm->u.pointer.u.linear_addr;
> + ret = copy_to_user(p, bounce_bufs[i],
> + min(src_parm->u.pointer.size,
> + dst_parm->u.pointer.size));
> + if (ret)
> + return -EFAULT;
> + break;
> +
> + default:
> + WARN_ON(1);
> + return -EINVAL;
> + }
> + }
> +
> + return 0;
> +}
> +
> +int vbg_hgcm_call(struct vbg_dev *gdev, u32 client_id, u32 function,
> + u32 timeout_ms, struct vmmdev_hgcm_function_parameter *parms,
> + u32 parm_count, int *vbox_status)
> +{
> + struct vmmdev_hgcm_call *call;
> + void **bounce_bufs = NULL;
> + bool leak_it;
> + size_t size;
> + int i, ret;
> +
> + size = sizeof(struct vmmdev_hgcm_call) +
> + parm_count * sizeof(struct vmmdev_hgcm_function_parameter);
> + /*
> + * Validate and buffer the parameters for the call. This also increases
> + * call_size with the amount of extra space needed for page lists.
> + */
> + ret = hgcm_call_preprocess(parms, parm_count, &bounce_bufs, &size);
> + if (ret) {
> + /* Even on error bounce bufs may still have been allocated */
> + goto free_bounce_bufs;
> + }
> +
> + call = vbg_req_alloc(size, VMMDEVREQ_HGCM_CALL);
> + if (!call) {
> + ret = -ENOMEM;
> + goto free_bounce_bufs;
> + }
> +
> + hgcm_call_init_call(call, client_id, function, parms, parm_count,
> + bounce_bufs);
> +
> + ret = vbg_hgcm_do_call(gdev, call, timeout_ms, &leak_it);
> + if (ret == 0) {
> + *vbox_status = call->header.result;
> + ret = hgcm_call_copy_back_result(call, parms, parm_count,
> + bounce_bufs);
> + }
> +
> + if (!leak_it)
> + kfree(call);
> +
> +free_bounce_bufs:
> + if (bounce_bufs) {
> + for (i = 0; i < parm_count; i++)
> + kvfree(bounce_bufs[i]);
> + kfree(bounce_bufs);
> + }
> +
> + return ret;
> +}
> +EXPORT_SYMBOL(vbg_hgcm_call);
> +
> +#ifdef CONFIG_COMPAT
> +int vbg_hgcm_call32(
> + struct vbg_dev *gdev, u32 client_id, u32 function, u32 timeout_ms,
> + struct vmmdev_hgcm_function_parameter32 *parm32, u32 parm_count,
> + int *vbox_status)
> +{
> + struct vmmdev_hgcm_function_parameter *parm64 = NULL;
> + u32 i, size;
> + int ret = 0;
> +
> + /* KISS allocate a temporary request and convert the parameters. */
> + size = parm_count * sizeof(struct vmmdev_hgcm_function_parameter);
> + parm64 = kzalloc(size, GFP_KERNEL);
> + if (!parm64)
> + return -ENOMEM;
> +
> + for (i = 0; i < parm_count; i++) {
> + switch (parm32[i].type) {
> + case VMMDEV_HGCM_PARM_TYPE_32BIT:
> + parm64[i].type = VMMDEV_HGCM_PARM_TYPE_32BIT;
> + parm64[i].u.value32 = parm32[i].u.value32;
> + break;
> +
> + case VMMDEV_HGCM_PARM_TYPE_64BIT:
> + parm64[i].type = VMMDEV_HGCM_PARM_TYPE_64BIT;
> + parm64[i].u.value64 = parm32[i].u.value64;
> + break;
> +
> + case VMMDEV_HGCM_PARM_TYPE_LINADDR_OUT:
> + case VMMDEV_HGCM_PARM_TYPE_LINADDR:
> + case VMMDEV_HGCM_PARM_TYPE_LINADDR_IN:
> + parm64[i].type = parm32[i].type;
> + parm64[i].u.pointer.size = parm32[i].u.pointer.size;
> + parm64[i].u.pointer.u.linear_addr =
> + parm32[i].u.pointer.u.linear_addr;
> + break;
> +
> + default:
> + ret = -EINVAL;
> + }
> + if (ret < 0)
> + goto out_free;
> + }
> +
> + ret = vbg_hgcm_call(gdev, client_id, function, timeout_ms,
> + parm64, parm_count, vbox_status);
> + if (ret < 0)
> + goto out_free;
> +
> + /* Copy back. */
> + for (i = 0; i < parm_count; i++, parm32++, parm64++) {
> + switch (parm64[i].type) {
> + case VMMDEV_HGCM_PARM_TYPE_32BIT:
> + parm32[i].u.value32 = parm64[i].u.value32;
> + break;
> +
> + case VMMDEV_HGCM_PARM_TYPE_64BIT:
> + parm32[i].u.value64 = parm64[i].u.value64;
> + break;
> +
> + case VMMDEV_HGCM_PARM_TYPE_LINADDR_OUT:
> + case VMMDEV_HGCM_PARM_TYPE_LINADDR:
> + case VMMDEV_HGCM_PARM_TYPE_LINADDR_IN:
> + parm32[i].u.pointer.size = parm64[i].u.pointer.size;
> + break;
> +
> + default:
> + WARN_ON(1);
> + ret = -EINVAL;
> + }
> + }
> +
> +out_free:
> + kfree(parm64);
> + return ret;
> +}
> +#endif
> +
> +static const int vbg_status_code_to_errno_table[] = {
> + [-VERR_ACCESS_DENIED] = -EPERM,
> + [-VERR_FILE_NOT_FOUND] = -ENOENT,
> + [-VERR_PROCESS_NOT_FOUND] = -ESRCH,
> + [-VERR_INTERRUPTED] = -EINTR,
> + [-VERR_DEV_IO_ERROR] = -EIO,
> + [-VERR_TOO_MUCH_DATA] = -E2BIG,
> + [-VERR_BAD_EXE_FORMAT] = -ENOEXEC,
> + [-VERR_INVALID_HANDLE] = -EBADF,
> + [-VERR_TRY_AGAIN] = -EAGAIN,
> + [-VERR_NO_MEMORY] = -ENOMEM,
> + [-VERR_INVALID_POINTER] = -EFAULT,
> + [-VERR_RESOURCE_BUSY] = -EBUSY,
> + [-VERR_ALREADY_EXISTS] = -EEXIST,
> + [-VERR_NOT_SAME_DEVICE] = -EXDEV,
> + [-VERR_NOT_A_DIRECTORY] = -ENOTDIR,
> + [-VERR_PATH_NOT_FOUND] = -ENOTDIR,
> + [-VERR_IS_A_DIRECTORY] = -EISDIR,
> + [-VERR_INVALID_PARAMETER] = -EINVAL,
> + [-VERR_TOO_MANY_OPEN_FILES] = -ENFILE,
> + [-VERR_INVALID_FUNCTION] = -ENOTTY,
> + [-VERR_SHARING_VIOLATION] = -ETXTBSY,
> + [-VERR_FILE_TOO_BIG] = -EFBIG,
> + [-VERR_DISK_FULL] = -ENOSPC,
> + [-VERR_SEEK_ON_DEVICE] = -ESPIPE,
> + [-VERR_WRITE_PROTECT] = -EROFS,
> + [-VERR_BROKEN_PIPE] = -EPIPE,
> + [-VERR_DEADLOCK] = -EDEADLK,
> + [-VERR_FILENAME_TOO_LONG] = -ENAMETOOLONG,
> + [-VERR_FILE_LOCK_FAILED] = -ENOLCK,
> + [-VERR_NOT_IMPLEMENTED] = -ENOSYS,
> + [-VERR_NOT_SUPPORTED] = -ENOSYS,
> + [-VERR_DIR_NOT_EMPTY] = -ENOTEMPTY,
> + [-VERR_TOO_MANY_SYMLINKS] = -ELOOP,
> + [-VERR_NO_DATA] = -ENODATA,
> + [-VERR_NET_NO_NETWORK] = -ENONET,
> + [-VERR_NET_NOT_UNIQUE_NAME] = -ENOTUNIQ,
> + [-VERR_NO_TRANSLATION] = -EILSEQ,
> + [-VERR_NET_NOT_SOCKET] = -ENOTSOCK,
> + [-VERR_NET_DEST_ADDRESS_REQUIRED] = -EDESTADDRREQ,
> + [-VERR_NET_MSG_SIZE] = -EMSGSIZE,
> + [-VERR_NET_PROTOCOL_TYPE] = -EPROTOTYPE,
> + [-VERR_NET_PROTOCOL_NOT_AVAILABLE] = -ENOPROTOOPT,
> + [-VERR_NET_PROTOCOL_NOT_SUPPORTED] = -EPROTONOSUPPORT,
> + [-VERR_NET_SOCKET_TYPE_NOT_SUPPORTED] = -ESOCKTNOSUPPORT,
> + [-VERR_NET_OPERATION_NOT_SUPPORTED] = -EOPNOTSUPP,
> + [-VERR_NET_PROTOCOL_FAMILY_NOT_SUPPORTED] = -EPFNOSUPPORT,
> + [-VERR_NET_ADDRESS_FAMILY_NOT_SUPPORTED] = -EAFNOSUPPORT,
> + [-VERR_NET_ADDRESS_IN_USE] = -EADDRINUSE,
> + [-VERR_NET_ADDRESS_NOT_AVAILABLE] = -EADDRNOTAVAIL,
> + [-VERR_NET_DOWN] = -ENETDOWN,
> + [-VERR_NET_UNREACHABLE] = -ENETUNREACH,
> + [-VERR_NET_CONNECTION_RESET] = -ENETRESET,
> + [-VERR_NET_CONNECTION_ABORTED] = -ECONNABORTED,
> + [-VERR_NET_CONNECTION_RESET_BY_PEER] = -ECONNRESET,
> + [-VERR_NET_NO_BUFFER_SPACE] = -ENOBUFS,
> + [-VERR_NET_ALREADY_CONNECTED] = -EISCONN,
> + [-VERR_NET_NOT_CONNECTED] = -ENOTCONN,
> + [-VERR_NET_SHUTDOWN] = -ESHUTDOWN,
> + [-VERR_NET_TOO_MANY_REFERENCES] = -ETOOMANYREFS,
> + [-VERR_TIMEOUT] = -ETIMEDOUT,
> + [-VERR_NET_CONNECTION_REFUSED] = -ECONNREFUSED,
> + [-VERR_NET_HOST_DOWN] = -EHOSTDOWN,
> + [-VERR_NET_HOST_UNREACHABLE] = -EHOSTUNREACH,
> + [-VERR_NET_ALREADY_IN_PROGRESS] = -EALREADY,
> + [-VERR_NET_IN_PROGRESS] = -EINPROGRESS,
> + [-VERR_MEDIA_NOT_PRESENT] = -ENOMEDIUM,
> + [-VERR_MEDIA_NOT_RECOGNIZED] = -EMEDIUMTYPE,
> +};
> +
> +int vbg_status_code_to_errno(int rc)
> +{
> + if (rc >= 0)
> + return 0;
> +
> + rc = -rc;
> + if (rc >= ARRAY_SIZE(vbg_status_code_to_errno_table) ||
> + vbg_status_code_to_errno_table[rc] == 0) {
> + vbg_warn("%s: Unhandled err %d\n", __func__, -rc);
> + return -EPROTO;
> + }
> +
> + return vbg_status_code_to_errno_table[rc];
> +}
> +EXPORT_SYMBOL(vbg_status_code_to_errno);
> diff --git a/drivers/virt/vboxguest/vmmdev.h b/drivers/virt/vboxguest/vmmdev.h
> new file mode 100644
> index 000000000000..0802a669b72b
> --- /dev/null
> +++ b/drivers/virt/vboxguest/vmmdev.h
> @@ -0,0 +1,460 @@
> +/*
> + * Virtual Device for Guest <-> VMM/Host communication interface
> + *
> + * Copyright (C) 2006-2016 Oracle Corporation
> + *
> + * This program is free software; you can redistribute it and/or modify
> + * it under the terms of the GNU General Public License version 2 as
> + * published by the Free Software Foundation.
> + *
> + * The contents of this file may alternatively be used under the terms
> + * of the Common Development and Distribution License Version 1.0
> + * (CDDL) only, in which case the provisions of the CDDL are applicable
> + * instead of those of the GPL.
> + *
> + * You may elect to license modified versions of this file under the
> + * terms and conditions of either the GPL or the CDDL or both.
> + */
> +
> +#ifndef __VBOX_VMMDEV_H__
> +#define __VBOX_VMMDEV_H__
> +
> +#include <asm/bitsperlong.h>
> +#include <linux/sizes.h>
> +#include <linux/types.h>
> +#include <linux/vbox_vmmdev_types.h>
> +
> +/* Port for generic request interface (relative offset). */
> +#define VMMDEV_PORT_OFF_REQUEST 0
> +
> +/** Layout of VMMDEV RAM region that contains information for guest. */
> +struct vmmdev_memory {
> + /** The size of this structure. */
> + u32 size;
> + /** The structure version. (VMMDEV_MEMORY_VERSION) */
> + u32 version;
> +
> + union {
> + struct {
> + /** Flag telling that VMMDev has events pending. */
> + u8 have_events;
> + /** Explicit padding, MBZ. */
> + u8 padding[3];
> + } V1_04;
> +
> + struct {
> + /** Pending events flags, set by host. */
> + u32 host_events;
> + /** Mask of events the guest wants, set by guest. */
> + u32 guest_event_mask;
> + } V1_03;
> + } V;
> +
> + /* struct vbva_memory, not used */
> +};
> +VMMDEV_ASSERT_SIZE(vmmdev_memory, 8 + 8);
> +
> +/** Version of vmmdev_memory structure (vmmdev_memory::version). */
> +#define VMMDEV_MEMORY_VERSION (1)
> +
> +/* Host mouse capabilities has been changed. */
> +#define VMMDEV_EVENT_MOUSE_CAPABILITIES_CHANGED BIT(0)
> +/* HGCM event. */
> +#define VMMDEV_EVENT_HGCM BIT(1)
> +/* A display change request has been issued. */
> +#define VMMDEV_EVENT_DISPLAY_CHANGE_REQUEST BIT(2)
> +/* Credentials are available for judgement. */
> +#define VMMDEV_EVENT_JUDGE_CREDENTIALS BIT(3)
> +/* The guest has been restored. */
> +#define VMMDEV_EVENT_RESTORED BIT(4)
> +/* Seamless mode state changed. */
> +#define VMMDEV_EVENT_SEAMLESS_MODE_CHANGE_REQUEST BIT(5)
> +/* Memory balloon size changed. */
> +#define VMMDEV_EVENT_BALLOON_CHANGE_REQUEST BIT(6)
> +/* Statistics interval changed. */
> +#define VMMDEV_EVENT_STATISTICS_INTERVAL_CHANGE_REQUEST BIT(7)
> +/* VRDP status changed. */
> +#define VMMDEV_EVENT_VRDP BIT(8)
> +/* New mouse position data available. */
> +#define VMMDEV_EVENT_MOUSE_POSITION_CHANGED BIT(9)
> +/* CPU hotplug event occurred. */
> +#define VMMDEV_EVENT_CPU_HOTPLUG BIT(10)
> +/* The mask of valid events, for sanity checking. */
> +#define VMMDEV_EVENT_VALID_EVENT_MASK 0x000007ffU
> +
> +/*
> + * Additions are allowed to work only if additions_major == vmmdev_current &&
> + * additions_minor <= vmmdev_current. Additions version is reported to host
> + * (VMMDev) by VMMDEVREQ_REPORT_GUEST_INFO.
> + */
> +#define VMMDEV_VERSION 0x00010004
> +#define VMMDEV_VERSION_MAJOR (VMMDEV_VERSION >> 16)
> +#define VMMDEV_VERSION_MINOR (VMMDEV_VERSION & 0xffff)
> +
> +/* Maximum request packet size. */
> +#define VMMDEV_MAX_VMMDEVREQ_SIZE 1048576
> +
> +/* Version of vmmdev_request_header structure. */
> +#define VMMDEV_REQUEST_HEADER_VERSION 0x10001
> +
> +/** struct vmmdev_request_header - Generic VMMDev request header. */
> +struct vmmdev_request_header {
> + /** IN: Size of the structure in bytes (including body). */
> + u32 size;
> + /** IN: Version of the structure. */
> + u32 version;
> + /** IN: Type of the request. */
> + enum vmmdev_request_type request_type;
> + /** OUT: Return code. */
> + s32 rc;
> + /** Reserved field no.1. MBZ. */
> + u32 reserved1;
> + /** Reserved field no.2. MBZ. */
> + u32 reserved2;
> +};
> +VMMDEV_ASSERT_SIZE(vmmdev_request_header, 24);
> +
> +/**
> + * struct vmmdev_mouse_status - Mouse status request structure.
> + *
> + * Used by VMMDEVREQ_GET_MOUSE_STATUS and VMMDEVREQ_SET_MOUSE_STATUS.
> + */
> +struct vmmdev_mouse_status {
> + /** header */
> + struct vmmdev_request_header header;
> + /** Mouse feature mask. See VMMDEV_MOUSE_*. */
> + u32 mouse_features;
> + /** Mouse x position. */
> + s32 pointer_pos_x;
> + /** Mouse y position. */
> + s32 pointer_pos_y;
> +};
> +VMMDEV_ASSERT_SIZE(vmmdev_mouse_status, 24 + 12);
> +
> +/* The guest can (== wants to) handle absolute coordinates. */
> +#define VMMDEV_MOUSE_GUEST_CAN_ABSOLUTE BIT(0)
> +/*
> + * The host can (== wants to) send absolute coordinates.
> + * (Input not captured.)
> + */
> +#define VMMDEV_MOUSE_HOST_WANTS_ABSOLUTE BIT(1)
> +/*
> + * The guest can *NOT* switch to software cursor and therefore depends on the
> + * host cursor.
> + *
> + * When guest additions are installed and the host has promised to display the
> + * cursor itself, the guest installs a hardware mouse driver. Don't ask the
> + * guest to switch to a software cursor then.
> + */
> +#define VMMDEV_MOUSE_GUEST_NEEDS_HOST_CURSOR BIT(2)
> +/* The host does NOT provide support for drawing the cursor itself. */
> +#define VMMDEV_MOUSE_HOST_CANNOT_HWPOINTER BIT(3)
> +/* The guest can read VMMDev events to find out about pointer movement */
> +#define VMMDEV_MOUSE_NEW_PROTOCOL BIT(4)
> +/*
> + * If the guest changes the status of the VMMDEV_MOUSE_GUEST_NEEDS_HOST_CURSOR
> + * bit, the host will honour this.
> + */
> +#define VMMDEV_MOUSE_HOST_RECHECKS_NEEDS_HOST_CURSOR BIT(5)
> +/*
> + * The host supplies an absolute pointing device. The Guest Additions may
> + * wish to use this to decide whether to install their own driver.
> + */
> +#define VMMDEV_MOUSE_HOST_HAS_ABS_DEV BIT(6)
> +
> +/* The minimum value our pointing device can return. */
> +#define VMMDEV_MOUSE_RANGE_MIN 0
> +/* The maximum value our pointing device can return. */
> +#define VMMDEV_MOUSE_RANGE_MAX 0xFFFF
> +
> +/**
> + * struct vmmdev_host_version - VirtualBox host version request structure.
> + *
> + * VBG uses this to detect the precense of new features in the interface.
> + */
> +struct vmmdev_host_version {
> + /** Header. */
> + struct vmmdev_request_header header;
> + /** Major version. */
> + u16 major;
> + /** Minor version. */
> + u16 minor;
> + /** Build number. */
> + u32 build;
> + /** SVN revision. */
> + u32 revision;
> + /** Feature mask. */
> + u32 features;
> +};
> +VMMDEV_ASSERT_SIZE(vmmdev_host_version, 24 + 16);
> +
> +/* Physical page lists are supported by HGCM. */
> +#define VMMDEV_HVF_HGCM_PHYS_PAGE_LIST BIT(0)
> +
> +/**
> + * struct vmmdev_mask - Structure to set / clear bits in a mask used for
> + * VMMDEVREQ_SET_GUEST_CAPABILITIES and VMMDEVREQ_CTL_GUEST_FILTER_MASK.
> + */
> +struct vmmdev_mask {
> + /** Header. */
> + struct vmmdev_request_header header;
> + /** Mask of bits to be set. */
> + u32 or_mask;
> + /** Mask of bits to be cleared. */
> + u32 not_mask;
> +};
> +VMMDEV_ASSERT_SIZE(vmmdev_mask, 24 + 8);
> +
> +/* The guest supports seamless display rendering. */
> +#define VMMDEV_GUEST_SUPPORTS_SEAMLESS BIT(0)
> +/* The guest supports mapping guest to host windows. */
> +#define VMMDEV_GUEST_SUPPORTS_GUEST_HOST_WINDOW_MAPPING BIT(1)
> +/*
> + * The guest graphical additions are active.
> + * Used for fast activation and deactivation of certain graphical operations
> + * (e.g. resizing & seamless). The legacy VMMDEVREQ_REPORT_GUEST_CAPABILITIES
> + * request sets this automatically, but VMMDEVREQ_SET_GUEST_CAPABILITIES does
> + * not.
> + */
> +#define VMMDEV_GUEST_SUPPORTS_GRAPHICS BIT(2)
> +
> +/** struct vmmdev_hypervisorinfo - Hypervisor info structure. */
> +struct vmmdev_hypervisorinfo {
> + /** Header. */
> + struct vmmdev_request_header header;
> + /**
> + * Guest virtual address of proposed hypervisor start.
> + * Not used by VMMDEVREQ_GET_HYPERVISOR_INFO.
> + */
> + u32 hypervisor_start;
> + /** Hypervisor size in bytes. */
> + u32 hypervisor_size;
> +};
> +VMMDEV_ASSERT_SIZE(vmmdev_hypervisorinfo, 24 + 8);
> +
> +/** struct vmmdev_events - Pending events structure. */
> +struct vmmdev_events {
> + /** Header. */
> + struct vmmdev_request_header header;
> + /** OUT: Pending event mask. */
> + u32 events;
> +};
> +VMMDEV_ASSERT_SIZE(vmmdev_events, 24 + 4);
> +
> +#define VMMDEV_OSTYPE_LINUX26 0x53000
> +#define VMMDEV_OSTYPE_X64 BIT(8)
> +
> +/** struct vmmdev_guestinfo - Guest information report. */
> +struct vmmdev_guest_info {
> + /** Header. */
> + struct vmmdev_request_header header;
> + /**
> + * The VMMDev interface version expected by additions.
> + * *Deprecated*, do not use anymore! Will be removed.
> + */
> + u32 interface_version;
> + /** Guest OS type. */
> + u32 os_type;
> +};
> +VMMDEV_ASSERT_SIZE(vmmdev_guest_info, 24 + 8);
> +
> +/** struct vmmdev_guestinfo2 - Guest information report, version 2. */
> +struct vmmdev_guest_info2 {
> + /** Header. */
> + struct vmmdev_request_header header;
> + /** Major version. */
> + u16 additions_major;
> + /** Minor version. */
> + u16 additions_minor;
> + /** Build number. */
> + u32 additions_build;
> + /** SVN revision. */
> + u32 additions_revision;
> + /** Feature mask, currently unused. */
> + u32 additions_features;
> + /**
> + * The intentional meaning of this field was:
> + * Some additional information, for example 'Beta 1' or something like
> + * that.
> + *
> + * The way it was implemented was implemented: VBG_VERSION_STRING.
> + *
> + * This means the first three members are duplicated in this field (if
> + * the guest build config is sane). So, the user must check this and
> + * chop it off before usage. There is, because of the Main code's blind
> + * trust in the field's content, no way back.
> + */
> + char name[128];
> +};
> +VMMDEV_ASSERT_SIZE(vmmdev_guest_info2, 24 + 144);
> +
> +enum vmmdev_guest_facility_type {
> + VBOXGUEST_FACILITY_TYPE_UNKNOWN = 0,
> + VBOXGUEST_FACILITY_TYPE_VBOXGUEST_DRIVER = 20,
> + /* VBoxGINA / VBoxCredProv / pam_vbox. */
> + VBOXGUEST_FACILITY_TYPE_AUTO_LOGON = 90,
> + VBOXGUEST_FACILITY_TYPE_VBOX_SERVICE = 100,
> + /* VBoxTray (Windows), VBoxClient (Linux, Unix). */
> + VBOXGUEST_FACILITY_TYPE_VBOX_TRAY_CLIENT = 101,
> + VBOXGUEST_FACILITY_TYPE_SEAMLESS = 1000,
> + VBOXGUEST_FACILITY_TYPE_GRAPHICS = 1100,
> + VBOXGUEST_FACILITY_TYPE_ALL = 0x7ffffffe,
> + /* Ensure the enum is a 32 bit data-type */
> + VBOXGUEST_FACILITY_TYPE_SIZEHACK = 0x7fffffff
> +};
> +
> +enum vmmdev_guest_facility_status {
> + VBOXGUEST_FACILITY_STATUS_INACTIVE = 0,
> + VBOXGUEST_FACILITY_STATUS_PAUSED = 1,
> + VBOXGUEST_FACILITY_STATUS_PRE_INIT = 20,
> + VBOXGUEST_FACILITY_STATUS_INIT = 30,
> + VBOXGUEST_FACILITY_STATUS_ACTIVE = 50,
> + VBOXGUEST_FACILITY_STATUS_TERMINATING = 100,
> + VBOXGUEST_FACILITY_STATUS_TERMINATED = 101,
> + VBOXGUEST_FACILITY_STATUS_FAILED = 800,
> + VBOXGUEST_FACILITY_STATUS_UNKNOWN = 999,
> + /* Ensure the enum is a 32 bit data-type */
> + VBOXGUEST_FACILITY_STATUS_SIZEHACK = 0x7fffffff
> +};
> +
> +/** struct vmmdev_guest_status - Guest Additions status structure. */
> +struct vmmdev_guest_status {
> + /** Header. */
> + struct vmmdev_request_header header;
> + /** Facility the status is indicated for. */
> + enum vmmdev_guest_facility_type facility;
> + /** Current guest status. */
> + enum vmmdev_guest_facility_status status;
> + /** Flags, not used at the moment. */
> + u32 flags;
> +};
> +VMMDEV_ASSERT_SIZE(vmmdev_guest_status, 24 + 12);
> +
> +#define VMMDEV_MEMORY_BALLOON_CHUNK_SIZE (1048576)
> +#define VMMDEV_MEMORY_BALLOON_CHUNK_PAGES (1048576 / 4096)
> +
> +/** struct vmmdev_memballoon_info - Memory-balloon info structure. */
> +struct vmmdev_memballoon_info {
> + /** Header. */
> + struct vmmdev_request_header header;
> + /** Balloon size in megabytes. */
> + u32 balloon_chunks;
> + /** Guest ram size in megabytes. */
> + u32 phys_mem_chunks;
> + /**
> + * Setting this to VMMDEV_EVENT_BALLOON_CHANGE_REQUEST indicates that
> + * the request is a response to that event.
> + * (Don't confuse this with VMMDEVREQ_ACKNOWLEDGE_EVENTS.)
> + */
> + u32 event_ack;
> +};
> +VMMDEV_ASSERT_SIZE(vmmdev_memballoon_info, 24 + 12);
> +
> +/** struct vmmdev_memballoon_change - Change the size of the balloon. */
> +struct vmmdev_memballoon_change {
> + /** Header. */
> + struct vmmdev_request_header header;
> + /** The number of pages in the array. */
> + u32 pages;
> + /** true = inflate, false = deflate. */
> + u32 inflate;
> + /** Physical address (u64) of each page. */
> + u64 phys_page[VMMDEV_MEMORY_BALLOON_CHUNK_PAGES];
> +};
> +
> +/** struct vmmdev_write_core_dump - Write Core Dump request data. */
> +struct vmmdev_write_core_dump {
> + /** Header. */
> + struct vmmdev_request_header header;
> + /** Flags (reserved, MBZ). */
> + u32 flags;
> +};
> +VMMDEV_ASSERT_SIZE(vmmdev_write_core_dump, 24 + 4);
> +
> +/** struct vmmdev_heartbeat - Heart beat check state structure. */
> +struct vmmdev_heartbeat {
> + /** Header. */
> + struct vmmdev_request_header header;
> + /** OUT: Guest heartbeat interval in nanosec. */
> + u64 interval_ns;
> + /** Heartbeat check flag. */
> + u8 enabled;
> + /** Explicit padding, MBZ. */
> + u8 padding[3];
> +} __packed;
> +VMMDEV_ASSERT_SIZE(vmmdev_heartbeat, 24 + 12);
> +
> +#define VMMDEV_HGCM_REQ_DONE BIT(0)
> +#define VMMDEV_HGCM_REQ_CANCELLED BIT(1)
> +
> +/** struct vmmdev_hgcmreq_header - vmmdev HGCM requests header. */
> +struct vmmdev_hgcmreq_header {
> + /** Request header. */
> + struct vmmdev_request_header header;
> +
> + /** HGCM flags. */
> + u32 flags;
> +
> + /** Result code. */
> + s32 result;
> +};
> +VMMDEV_ASSERT_SIZE(vmmdev_hgcmreq_header, 24 + 8);
> +
> +/** struct vmmdev_hgcm_connect - HGCM connect request structure. */
> +struct vmmdev_hgcm_connect {
> + /** HGCM request header. */
> + struct vmmdev_hgcmreq_header header;
> +
> + /** IN: Description of service to connect to. */
> + struct vmmdev_hgcm_service_location loc;
> +
> + /** OUT: Client identifier assigned by local instance of HGCM. */
> + u32 client_id;
> +};
> +VMMDEV_ASSERT_SIZE(vmmdev_hgcm_connect, 32 + 132 + 4);
> +
> +/** struct vmmdev_hgcm_disconnect - HGCM disconnect request structure. */
> +struct vmmdev_hgcm_disconnect {
> + /** HGCM request header. */
> + struct vmmdev_hgcmreq_header header;
> +
> + /** IN: Client identifier. */
> + u32 client_id;
> +};
> +VMMDEV_ASSERT_SIZE(vmmdev_hgcm_disconnect, 32 + 4);
> +
> +#define VMMDEV_HGCM_MAX_PARMS 32
> +
> +/** struct vmmdev_hgcm_call - HGCM call request structure. */
> +struct vmmdev_hgcm_call {
> + /* request header */
> + struct vmmdev_hgcmreq_header header;
> +
> + /** IN: Client identifier. */
> + u32 client_id;
> + /** IN: Service function number. */
> + u32 function;
> + /** IN: Number of parameters. */
> + u32 parm_count;
> + /** Parameters follow in form: HGCMFunctionParameter32|64 parms[X]; */
> +};
> +VMMDEV_ASSERT_SIZE(vmmdev_hgcm_call, 32 + 12);
> +
> +/**
> + * struct vmmdev_hgcm_cancel2 - HGCM cancel request structure, version 2.
> + *
> + * After the request header.rc will be:
> + *
> + * VINF_SUCCESS when cancelled.
> + * VERR_NOT_FOUND if the specified request cannot be found.
> + * VERR_INVALID_PARAMETER if the address is invalid valid.
> + */
> +struct vmmdev_hgcm_cancel2 {
> + /** Header. */
> + struct vmmdev_request_header header;
> + /** The physical address of the request to cancel. */
> + u32 phys_req_to_cancel;
> +};
> +VMMDEV_ASSERT_SIZE(vmmdev_hgcm_cancel2, 24 + 4);
> +
> +#endif
> diff --git a/include/linux/vbox_utils.h b/include/linux/vbox_utils.h
> new file mode 100644
> index 000000000000..a0a2b84c8c2e
> --- /dev/null
> +++ b/include/linux/vbox_utils.h
> @@ -0,0 +1,92 @@
> +/*
> + * Copyright (C) 2006-2016 Oracle Corporation
> + *
> + * This program is free software; you can redistribute it and/or modify
> + * it under the terms of the GNU General Public License version 2 as
> + * published by the Free Software Foundation.
> + *
> + * The contents of this file may alternatively be used under the terms
> + * of the Common Development and Distribution License Version 1.0
> + * (CDDL) only, in which case the provisions of the CDDL are applicable
> + * instead of those of the GPL.
> + *
> + * You may elect to license modified versions of this file under the
> + * terms and conditions of either the GPL or the CDDL or both.
> + */
> +
> +#ifndef __VBOX_UTILS_H__
> +#define __VBOX_UTILS_H__
> +
> +#include <linux/printk.h>
> +#include <linux/vbox_vmmdev_types.h>
> +
> +struct vbg_dev;
> +
> +/**
> + * vboxguest logging functions, these log both to the backdoor and call
> + * the equivalent kernel pr_foo function.
> + */
> +__printf(1, 2) void vbg_info(const char *fmt, ...);
> +__printf(1, 2) void vbg_warn(const char *fmt, ...);
> +__printf(1, 2) void vbg_err(const char *fmt, ...);
> +
> +/* Only use backdoor logging for non-dynamic debug builds */
> +#if defined(DEBUG) && !defined(CONFIG_DYNAMIC_DEBUG)
> +__printf(1, 2) void vbg_debug(const char *fmt, ...);
> +#else
> +#define vbg_debug pr_debug
> +#endif
> +
> +/**
> + * Allocate memory for generic request and initialize the request header.
> + *
> + * Return: the allocated memory
> + * @len: Size of memory block required for the request.
> + * @req_type: The generic request type.
> + */
> +void *vbg_req_alloc(size_t len, enum vmmdev_request_type req_type);
> +
> +/**
> + * Perform a generic request.
> + *
> + * Return: VBox status code
> + * @gdev: The Guest extension device.
> + * @req: Pointer to the request structure.
> + */
> +int vbg_req_perform(struct vbg_dev *gdev, void *req);
> +
> +int vbg_hgcm_connect(struct vbg_dev *gdev,
> + struct vmmdev_hgcm_service_location *loc,
> + u32 *client_id, int *vbox_status);
> +
> +int vbg_hgcm_disconnect(struct vbg_dev *gdev, u32 client_id, int *vbox_status);
> +
> +int vbg_hgcm_call(struct vbg_dev *gdev, u32 client_id, u32 function,
> + u32 timeout_ms, struct vmmdev_hgcm_function_parameter *parms,
> + u32 parm_count, int *vbox_status);
> +
> +int vbg_hgcm_call32(
> + struct vbg_dev *gdev, u32 client_id, u32 function, u32 timeout_ms,
> + struct vmmdev_hgcm_function_parameter32 *parm32, u32 parm_count,
> + int *vbox_status);
> +
> +/**
> + * Convert a VirtualBox status code to a standard Linux kernel return value.
> + * Return: 0 or negative errno value.
> + * @rc: VirtualBox status code to convert.
> + */
> +int vbg_status_code_to_errno(int rc);
> +
> +/**
> + * Helper for the vboxsf driver to get a reference to the guest device.
> + * Return: a pointer to the gdev; or a ERR_PTR value on error.
> + */
> +struct vbg_dev *vbg_get_gdev(void);
> +
> +/**
> + * Helper for the vboxsf driver to put a guest device reference.
> + * @gdev: Reference returned by vbg_get_gdev to put.
> + */
> +void vbg_put_gdev(struct vbg_dev *gdev);
> +
> +#endif
>
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