// SPDX-License-Identifier: GPL-2.0
/*
* virtio-fs: Virtio Filesystem
* Copyright (C) 2018 Red Hat, Inc.
*/
#include <linux/fs.h>
#include <linux/dax.h>
#include <linux/pci.h>
#include <linux/pfn_t.h>
#include <linux/module.h>
#include <linux/virtio.h>
#include <linux/virtio_fs.h>
#include <linux/delay.h>
#include <linux/fs_context.h>
#include <linux/fs_parser.h>
#include <linux/highmem.h>
#include <linux/uio.h>
#include "fuse_i.h"
/* Used to help calculate the FUSE connection's max_pages limit for a request's
* size. Parts of the struct fuse_req are sliced into scattergather lists in
* addition to the pages used, so this can help account for that overhead.
*/
#define FUSE_HEADER_OVERHEAD 4
/* List of virtio-fs device instances and a lock for the list. Also provides
* mutual exclusion in device removal and mounting path
*/
static DEFINE_MUTEX(virtio_fs_mutex);
static LIST_HEAD(virtio_fs_instances);
enum {
VQ_HIPRIO,
VQ_REQUEST
};
#define VQ_NAME_LEN 24
