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linux-sg2042/drivers/virt/vboxguest/vboxguest_utils.c

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/* 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/io.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,
u32 requestor)
{
struct vmmdev_request_header *req;
int order = get_order(PAGE_ALIGN(len));
req = (void *)__get_free_pages(GFP_KERNEL | GFP_DMA32, order);
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->requestor = requestor;
return req;
}
void vbg_req_free(void *req, size_t len)
{
if (!req)
return;
free_pages((unsigned long)req, get_order(PAGE_ALIGN(len)));
}
/* 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, u32 requestor,
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, requestor);
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;
}
vbg_req_free(hgcm_connect, sizeof(*hgcm_connect));
*vbox_status = rc;
return 0;
}
EXPORT_SYMBOL(vbg_hgcm_connect);
int vbg_hgcm_disconnect(struct vbg_dev *gdev, u32 requestor,
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,
requestor);
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;
vbg_req_free(hgcm_disconnect, sizeof(*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;
*bounce_buf_ret = bounce_buf;
if (copy_in) {
ret = copy_from_user(bounce_buf, (void __user *)buf, len);
if (ret)
return -EFAULT;
} else {
memset(bounce_buf, 0, len);
}
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);
fallthrough;
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 requestor, 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, requestor);
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 requestor, 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, requestor, 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);
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