diff options
| -rw-r--r-- | MAINTAINERS | 2 | ||||
| -rw-r--r-- | drivers/virt/vboxguest/vboxguest_utils.c | 801 | ||||
| -rw-r--r-- | drivers/virt/vboxguest/vmmdev.h | 449 | ||||
| -rw-r--r-- | include/linux/vbox_utils.h | 79 |
4 files changed, 1331 insertions, 0 deletions
diff --git a/MAINTAINERS b/MAINTAINERS index 405d4d28b612..673250e0867e 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -14562,7 +14562,9 @@ M: Hans de Goede <hdegoede@redhat.com> M: Arnd Bergmann <arnd@arndb.de> M: Greg Kroah-Hartman <gregkh@linuxfoundation.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@gmail.com> diff --git a/drivers/virt/vboxguest/vboxguest_utils.c b/drivers/virt/vboxguest/vboxguest_utils.c new file mode 100644 index 000000000000..8daea691fbb5 --- /dev/null +++ b/drivers/virt/vboxguest/vboxguest_utils.c @@ -0,0 +1,801 @@ +/* SPDX-License-Identifier: (GPL-2.0 OR CDDL-1.0) */ +/* + * vboxguest vmm-req and hgcm-call code, VBoxGuestR0LibHGCMInternal.cpp, + * VBoxGuestR0LibGenericRequest.cpp and RTErrConvertToErrno.cpp in vbox svn. + * + * Copyright (C) 2006-2016 Oracle Corporation + */ + +#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); + /* Fall through */ + 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..5e2ae978935d --- /dev/null +++ b/drivers/virt/vboxguest/vmmdev.h @@ -0,0 +1,449 @@ +/* SPDX-License-Identifier: (GPL-2.0 OR CDDL-1.0) */ +/* + * Virtual Device for Guest <-> VMM/Host communication interface + * + * Copyright (C) 2006-2016 Oracle Corporation + */ + +#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..c71def6b310f --- /dev/null +++ b/include/linux/vbox_utils.h @@ -0,0 +1,79 @@ +/* SPDX-License-Identifier: (GPL-2.0 OR CDDL-1.0) */ +/* Copyright (C) 2006-2016 Oracle Corporation */ + +#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 |