/* 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 #include #include #include #include #include #include #include #include #include #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; } void vbg_req_free(void *req, size_t len) { if (!req) return; kfree(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; } 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 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; 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; 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) 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);