linux/drivers/misc/vmw_vmci/vmci_driver.c

// SPDX-License-Identifier: GPL-2.0-only
/*
 * VMware VMCI Driver
 *
 * Copyright (C) 2012 VMware, Inc. All rights reserved.
 */

#include <linux/vmw_vmci_defs.h>
#include <linux/vmw_vmci_api.h>
#include <linux/atomic.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/init.h>

#include "vmci_driver.h"
#include "vmci_event.h"

static bool vmci_disable_host;
module_param_named(disable_host, vmci_disable_host, bool, 0);
MODULE_PARM_DESC(…) …;

static bool vmci_disable_guest;
module_param_named(disable_guest, vmci_disable_guest, bool, 0);
MODULE_PARM_DESC(…) …;

static bool vmci_guest_personality_initialized;
static bool vmci_host_personality_initialized;

static DEFINE_MUTEX(vmci_vsock_mutex); /* protects vmci_vsock_transport_cb */
static vmci_vsock_cb vmci_vsock_transport_cb;
static bool vmci_vsock_cb_host_called;

/*
 * vmci_get_context_id() - Gets the current context ID.
 *
 * Returns the current context ID.  Note that since this is accessed only
 * from code running in the host, this always returns the host context ID.
 */
u32 vmci_get_context_id(void)
{ … }
EXPORT_SYMBOL_GPL(…);

/*
 * vmci_register_vsock_callback() - Register the VSOCK vmci_transport callback.
 *
 * The callback will be called when the first host or guest becomes active,
 * or if they are already active when this function is called.
 * To unregister the callback, call this function with NULL parameter.
 *
 * Returns 0 on success. -EBUSY if a callback is already registered.
 */
int vmci_register_vsock_callback(vmci_vsock_cb callback)
{ … }
EXPORT_SYMBOL_GPL(…);

void vmci_call_vsock_callback(bool is_host)
{ … }

static int __init vmci_drv_init(void)
{ … }
module_init(…) …;

static void __exit vmci_drv_exit(void)
{ … }
module_exit(vmci_drv_exit);

MODULE_AUTHOR(…) …;
MODULE_DESCRIPTION(…) …;
MODULE_VERSION(…) …;
MODULE_LICENSE(…) …;