814 lines
23 KiB
C
814 lines
23 KiB
C
/* SPDX-License-Identifier: (GPL-2.0 OR CDDL-1.0) */
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/*
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* vboxguest vmm-req and hgcm-call code, VBoxGuestR0LibHGCMInternal.cpp,
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* VBoxGuestR0LibGenericRequest.cpp and RTErrConvertToErrno.cpp in vbox svn.
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*
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* Copyright (C) 2006-2016 Oracle Corporation
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*/
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#include <linux/errno.h>
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#include <linux/kernel.h>
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#include <linux/mm.h>
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#include <linux/module.h>
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#include <linux/sizes.h>
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#include <linux/slab.h>
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#include <linux/uaccess.h>
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#include <linux/vmalloc.h>
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#include <linux/vbox_err.h>
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#include <linux/vbox_utils.h>
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#include "vboxguest_core.h"
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/* Get the pointer to the first parameter of a HGCM call request. */
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#define VMMDEV_HGCM_CALL_PARMS(a) \
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((struct vmmdev_hgcm_function_parameter *)( \
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(u8 *)(a) + sizeof(struct vmmdev_hgcm_call)))
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/* The max parameter buffer size for a user request. */
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#define VBG_MAX_HGCM_USER_PARM (24 * SZ_1M)
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/* The max parameter buffer size for a kernel request. */
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#define VBG_MAX_HGCM_KERNEL_PARM (16 * SZ_1M)
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#define VBG_DEBUG_PORT 0x504
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/* This protects vbg_log_buf and serializes VBG_DEBUG_PORT accesses */
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static DEFINE_SPINLOCK(vbg_log_lock);
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static char vbg_log_buf[128];
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#define VBG_LOG(name, pr_func) \
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void name(const char *fmt, ...) \
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{ \
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unsigned long flags; \
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va_list args; \
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int i, count; \
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\
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va_start(args, fmt); \
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spin_lock_irqsave(&vbg_log_lock, flags); \
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\
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count = vscnprintf(vbg_log_buf, sizeof(vbg_log_buf), fmt, args);\
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for (i = 0; i < count; i++) \
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outb(vbg_log_buf[i], VBG_DEBUG_PORT); \
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\
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pr_func("%s", vbg_log_buf); \
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\
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spin_unlock_irqrestore(&vbg_log_lock, flags); \
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va_end(args); \
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} \
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EXPORT_SYMBOL(name)
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VBG_LOG(vbg_info, pr_info);
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VBG_LOG(vbg_warn, pr_warn);
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VBG_LOG(vbg_err, pr_err);
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#if defined(DEBUG) && !defined(CONFIG_DYNAMIC_DEBUG)
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VBG_LOG(vbg_debug, pr_debug);
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#endif
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void *vbg_req_alloc(size_t len, enum vmmdev_request_type req_type)
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{
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struct vmmdev_request_header *req;
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int order = get_order(PAGE_ALIGN(len));
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req = (void *)__get_free_pages(GFP_KERNEL | GFP_DMA32, order);
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if (!req)
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return NULL;
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memset(req, 0xaa, len);
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req->size = len;
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req->version = VMMDEV_REQUEST_HEADER_VERSION;
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req->request_type = req_type;
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req->rc = VERR_GENERAL_FAILURE;
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req->reserved1 = 0;
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req->reserved2 = 0;
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return req;
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}
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void vbg_req_free(void *req, size_t len)
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{
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if (!req)
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return;
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free_pages((unsigned long)req, get_order(PAGE_ALIGN(len)));
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}
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/* Note this function returns a VBox status code, not a negative errno!! */
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int vbg_req_perform(struct vbg_dev *gdev, void *req)
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{
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unsigned long phys_req = virt_to_phys(req);
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outl(phys_req, gdev->io_port + VMMDEV_PORT_OFF_REQUEST);
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/*
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* The host changes the request as a result of the outl, make sure
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* the outl and any reads of the req happen in the correct order.
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*/
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mb();
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return ((struct vmmdev_request_header *)req)->rc;
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}
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static bool hgcm_req_done(struct vbg_dev *gdev,
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struct vmmdev_hgcmreq_header *header)
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{
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unsigned long flags;
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bool done;
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spin_lock_irqsave(&gdev->event_spinlock, flags);
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done = header->flags & VMMDEV_HGCM_REQ_DONE;
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spin_unlock_irqrestore(&gdev->event_spinlock, flags);
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return done;
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}
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int vbg_hgcm_connect(struct vbg_dev *gdev,
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struct vmmdev_hgcm_service_location *loc,
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u32 *client_id, int *vbox_status)
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{
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struct vmmdev_hgcm_connect *hgcm_connect = NULL;
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int rc;
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hgcm_connect = vbg_req_alloc(sizeof(*hgcm_connect),
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VMMDEVREQ_HGCM_CONNECT);
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if (!hgcm_connect)
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return -ENOMEM;
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hgcm_connect->header.flags = 0;
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memcpy(&hgcm_connect->loc, loc, sizeof(*loc));
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hgcm_connect->client_id = 0;
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rc = vbg_req_perform(gdev, hgcm_connect);
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if (rc == VINF_HGCM_ASYNC_EXECUTE)
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wait_event(gdev->hgcm_wq,
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hgcm_req_done(gdev, &hgcm_connect->header));
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if (rc >= 0) {
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*client_id = hgcm_connect->client_id;
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rc = hgcm_connect->header.result;
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}
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vbg_req_free(hgcm_connect, sizeof(*hgcm_connect));
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*vbox_status = rc;
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return 0;
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}
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EXPORT_SYMBOL(vbg_hgcm_connect);
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int vbg_hgcm_disconnect(struct vbg_dev *gdev, u32 client_id, int *vbox_status)
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{
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struct vmmdev_hgcm_disconnect *hgcm_disconnect = NULL;
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int rc;
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hgcm_disconnect = vbg_req_alloc(sizeof(*hgcm_disconnect),
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VMMDEVREQ_HGCM_DISCONNECT);
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if (!hgcm_disconnect)
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return -ENOMEM;
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hgcm_disconnect->header.flags = 0;
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hgcm_disconnect->client_id = client_id;
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rc = vbg_req_perform(gdev, hgcm_disconnect);
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if (rc == VINF_HGCM_ASYNC_EXECUTE)
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wait_event(gdev->hgcm_wq,
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hgcm_req_done(gdev, &hgcm_disconnect->header));
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if (rc >= 0)
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rc = hgcm_disconnect->header.result;
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vbg_req_free(hgcm_disconnect, sizeof(*hgcm_disconnect));
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*vbox_status = rc;
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return 0;
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}
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EXPORT_SYMBOL(vbg_hgcm_disconnect);
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static u32 hgcm_call_buf_size_in_pages(void *buf, u32 len)
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{
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u32 size = PAGE_ALIGN(len + ((unsigned long)buf & ~PAGE_MASK));
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return size >> PAGE_SHIFT;
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}
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static void hgcm_call_add_pagelist_size(void *buf, u32 len, size_t *extra)
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{
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u32 page_count;
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page_count = hgcm_call_buf_size_in_pages(buf, len);
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*extra += offsetof(struct vmmdev_hgcm_pagelist, pages[page_count]);
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}
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static int hgcm_call_preprocess_linaddr(
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const struct vmmdev_hgcm_function_parameter *src_parm,
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void **bounce_buf_ret, size_t *extra)
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{
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void *buf, *bounce_buf;
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bool copy_in;
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u32 len;
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int ret;
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buf = (void *)src_parm->u.pointer.u.linear_addr;
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len = src_parm->u.pointer.size;
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copy_in = src_parm->type != VMMDEV_HGCM_PARM_TYPE_LINADDR_OUT;
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if (len > VBG_MAX_HGCM_USER_PARM)
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return -E2BIG;
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bounce_buf = kvmalloc(len, GFP_KERNEL);
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if (!bounce_buf)
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return -ENOMEM;
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*bounce_buf_ret = bounce_buf;
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if (copy_in) {
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ret = copy_from_user(bounce_buf, (void __user *)buf, len);
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if (ret)
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return -EFAULT;
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} else {
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memset(bounce_buf, 0, len);
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}
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hgcm_call_add_pagelist_size(bounce_buf, len, extra);
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return 0;
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}
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/**
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* Preprocesses the HGCM call, validate parameters, alloc bounce buffers and
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* figure out how much extra storage we need for page lists.
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* Return: 0 or negative errno value.
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* @src_parm: Pointer to source function call parameters
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* @parm_count: Number of function call parameters.
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* @bounce_bufs_ret: Where to return the allocated bouncebuffer array
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* @extra: Where to return the extra request space needed for
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* physical page lists.
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*/
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static int hgcm_call_preprocess(
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const struct vmmdev_hgcm_function_parameter *src_parm,
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u32 parm_count, void ***bounce_bufs_ret, size_t *extra)
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{
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void *buf, **bounce_bufs = NULL;
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u32 i, len;
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int ret;
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for (i = 0; i < parm_count; i++, src_parm++) {
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switch (src_parm->type) {
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case VMMDEV_HGCM_PARM_TYPE_32BIT:
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case VMMDEV_HGCM_PARM_TYPE_64BIT:
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break;
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case VMMDEV_HGCM_PARM_TYPE_LINADDR:
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case VMMDEV_HGCM_PARM_TYPE_LINADDR_IN:
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case VMMDEV_HGCM_PARM_TYPE_LINADDR_OUT:
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if (!bounce_bufs) {
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bounce_bufs = kcalloc(parm_count,
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sizeof(void *),
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GFP_KERNEL);
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if (!bounce_bufs)
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return -ENOMEM;
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*bounce_bufs_ret = bounce_bufs;
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}
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ret = hgcm_call_preprocess_linaddr(src_parm,
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&bounce_bufs[i],
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extra);
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if (ret)
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return ret;
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break;
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case VMMDEV_HGCM_PARM_TYPE_LINADDR_KERNEL:
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case VMMDEV_HGCM_PARM_TYPE_LINADDR_KERNEL_IN:
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case VMMDEV_HGCM_PARM_TYPE_LINADDR_KERNEL_OUT:
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buf = (void *)src_parm->u.pointer.u.linear_addr;
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len = src_parm->u.pointer.size;
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if (WARN_ON(len > VBG_MAX_HGCM_KERNEL_PARM))
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return -E2BIG;
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hgcm_call_add_pagelist_size(buf, len, extra);
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break;
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default:
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return -EINVAL;
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}
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}
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return 0;
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}
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/**
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* Translates linear address types to page list direction flags.
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*
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* Return: page list flags.
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* @type: The type.
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*/
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static u32 hgcm_call_linear_addr_type_to_pagelist_flags(
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enum vmmdev_hgcm_function_parameter_type type)
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{
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switch (type) {
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default:
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WARN_ON(1);
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/* Fall through */
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case VMMDEV_HGCM_PARM_TYPE_LINADDR:
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case VMMDEV_HGCM_PARM_TYPE_LINADDR_KERNEL:
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return VMMDEV_HGCM_F_PARM_DIRECTION_BOTH;
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case VMMDEV_HGCM_PARM_TYPE_LINADDR_IN:
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case VMMDEV_HGCM_PARM_TYPE_LINADDR_KERNEL_IN:
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return VMMDEV_HGCM_F_PARM_DIRECTION_TO_HOST;
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case VMMDEV_HGCM_PARM_TYPE_LINADDR_OUT:
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case VMMDEV_HGCM_PARM_TYPE_LINADDR_KERNEL_OUT:
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return VMMDEV_HGCM_F_PARM_DIRECTION_FROM_HOST;
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}
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}
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static void hgcm_call_init_linaddr(struct vmmdev_hgcm_call *call,
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struct vmmdev_hgcm_function_parameter *dst_parm, void *buf, u32 len,
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enum vmmdev_hgcm_function_parameter_type type, u32 *off_extra)
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{
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struct vmmdev_hgcm_pagelist *dst_pg_lst;
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struct page *page;
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bool is_vmalloc;
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u32 i, page_count;
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dst_parm->type = type;
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if (len == 0) {
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dst_parm->u.pointer.size = 0;
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dst_parm->u.pointer.u.linear_addr = 0;
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return;
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}
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dst_pg_lst = (void *)call + *off_extra;
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page_count = hgcm_call_buf_size_in_pages(buf, len);
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is_vmalloc = is_vmalloc_addr(buf);
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dst_parm->type = VMMDEV_HGCM_PARM_TYPE_PAGELIST;
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dst_parm->u.page_list.size = len;
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dst_parm->u.page_list.offset = *off_extra;
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dst_pg_lst->flags = hgcm_call_linear_addr_type_to_pagelist_flags(type);
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dst_pg_lst->offset_first_page = (unsigned long)buf & ~PAGE_MASK;
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dst_pg_lst->page_count = page_count;
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for (i = 0; i < page_count; i++) {
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if (is_vmalloc)
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page = vmalloc_to_page(buf);
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else
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page = virt_to_page(buf);
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dst_pg_lst->pages[i] = page_to_phys(page);
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buf += PAGE_SIZE;
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}
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*off_extra += offsetof(struct vmmdev_hgcm_pagelist, pages[page_count]);
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}
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/**
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* Initializes the call request that we're sending to the host.
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* @call: The call to initialize.
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* @client_id: The client ID of the caller.
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* @function: The function number of the function to call.
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* @src_parm: Pointer to source function call parameters.
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* @parm_count: Number of function call parameters.
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* @bounce_bufs: The bouncebuffer array.
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*/
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static void hgcm_call_init_call(
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struct vmmdev_hgcm_call *call, u32 client_id, u32 function,
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const struct vmmdev_hgcm_function_parameter *src_parm,
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u32 parm_count, void **bounce_bufs)
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{
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struct vmmdev_hgcm_function_parameter *dst_parm =
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VMMDEV_HGCM_CALL_PARMS(call);
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u32 i, off_extra = (uintptr_t)(dst_parm + parm_count) - (uintptr_t)call;
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void *buf;
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call->header.flags = 0;
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call->header.result = VINF_SUCCESS;
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call->client_id = client_id;
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call->function = function;
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call->parm_count = parm_count;
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for (i = 0; i < parm_count; i++, src_parm++, dst_parm++) {
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switch (src_parm->type) {
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case VMMDEV_HGCM_PARM_TYPE_32BIT:
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case VMMDEV_HGCM_PARM_TYPE_64BIT:
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*dst_parm = *src_parm;
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break;
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case VMMDEV_HGCM_PARM_TYPE_LINADDR:
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case VMMDEV_HGCM_PARM_TYPE_LINADDR_IN:
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case VMMDEV_HGCM_PARM_TYPE_LINADDR_OUT:
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hgcm_call_init_linaddr(call, dst_parm, bounce_bufs[i],
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src_parm->u.pointer.size,
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src_parm->type, &off_extra);
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break;
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case VMMDEV_HGCM_PARM_TYPE_LINADDR_KERNEL:
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case VMMDEV_HGCM_PARM_TYPE_LINADDR_KERNEL_IN:
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case VMMDEV_HGCM_PARM_TYPE_LINADDR_KERNEL_OUT:
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buf = (void *)src_parm->u.pointer.u.linear_addr;
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hgcm_call_init_linaddr(call, dst_parm, buf,
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src_parm->u.pointer.size,
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src_parm->type, &off_extra);
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break;
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default:
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WARN_ON(1);
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dst_parm->type = VMMDEV_HGCM_PARM_TYPE_INVALID;
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}
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}
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}
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/**
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* Tries to cancel a pending HGCM call.
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*
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* Return: VBox status code
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*/
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static int hgcm_cancel_call(struct vbg_dev *gdev, struct vmmdev_hgcm_call *call)
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{
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int rc;
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/*
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* We use a pre-allocated request for cancellations, which is
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* protected by cancel_req_mutex. This means that all cancellations
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* get serialized, this should be fine since they should be rare.
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*/
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mutex_lock(&gdev->cancel_req_mutex);
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gdev->cancel_req->phys_req_to_cancel = virt_to_phys(call);
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rc = vbg_req_perform(gdev, gdev->cancel_req);
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mutex_unlock(&gdev->cancel_req_mutex);
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if (rc == VERR_NOT_IMPLEMENTED) {
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call->header.flags |= VMMDEV_HGCM_REQ_CANCELLED;
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call->header.header.request_type = VMMDEVREQ_HGCM_CANCEL;
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rc = vbg_req_perform(gdev, call);
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if (rc == VERR_INVALID_PARAMETER)
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rc = VERR_NOT_FOUND;
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}
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if (rc >= 0)
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call->header.flags |= VMMDEV_HGCM_REQ_CANCELLED;
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return rc;
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}
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/**
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* Performs the call and completion wait.
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* Return: 0 or negative errno value.
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* @gdev: The VBoxGuest device extension.
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* @call: The call to execute.
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* @timeout_ms: Timeout in ms.
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* @leak_it: Where to return the leak it / free it, indicator.
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* Cancellation fun.
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*/
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static int vbg_hgcm_do_call(struct vbg_dev *gdev, struct vmmdev_hgcm_call *call,
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u32 timeout_ms, bool *leak_it)
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{
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int rc, cancel_rc, ret;
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long timeout;
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*leak_it = false;
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rc = vbg_req_perform(gdev, call);
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/*
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* If the call failed, then pretend success. Upper layers will
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* interpret the result code in the packet.
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*/
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if (rc < 0) {
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call->header.result = rc;
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return 0;
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}
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if (rc != VINF_HGCM_ASYNC_EXECUTE)
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return 0;
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/* Host decided to process the request asynchronously, wait for it */
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if (timeout_ms == U32_MAX)
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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)
|
|
vbg_req_free(call, size);
|
|
|
|
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_INVALID_NAME] = -ENOENT,
|
|
[-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_MORE_FILES] = -ENODATA,
|
|
[-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);
|