1 files changed, 79 insertions, 0 deletions

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