linux/drivers/hv/hv_utils_transport.c

// SPDX-License-Identifier: GPL-2.0-only
/*
 * Kernel/userspace transport abstraction for Hyper-V util driver.
 *
 * Copyright (C) 2015, Vitaly Kuznetsov <[email protected]>
 */

#include <linux/slab.h>
#include <linux/fs.h>
#include <linux/poll.h>

#include "hyperv_vmbus.h"
#include "hv_utils_transport.h"

static DEFINE_SPINLOCK(hvt_list_lock);
static LIST_HEAD(hvt_list);

static void hvt_reset(struct hvutil_transport *hvt)
{ … }

static ssize_t hvt_op_read(struct file *file, char __user *buf,
			   size_t count, loff_t *ppos)
{ … }

static ssize_t hvt_op_write(struct file *file, const char __user *buf,
			    size_t count, loff_t *ppos)
{ … }

static __poll_t hvt_op_poll(struct file *file, poll_table *wait)
{ … }

static int hvt_op_open(struct inode *inode, struct file *file)
{ … }

static void hvt_transport_free(struct hvutil_transport *hvt)
{ … }

static int hvt_op_release(struct inode *inode, struct file *file)
{ … }

static void hvt_cn_callback(struct cn_msg *msg, struct netlink_skb_parms *nsp)
{ … }

int hvutil_transport_send(struct hvutil_transport *hvt, void *msg, int len,
			  void (*on_read_cb)(void))
{ … }

struct hvutil_transport *hvutil_transport_init(const char *name,
					       u32 cn_idx, u32 cn_val,
					       int (*on_msg)(void *, int),
					       void (*on_reset)(void))
{ … }

void hvutil_transport_destroy(struct hvutil_transport *hvt)
{ … }