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virtio: add vhost-user-fs base device

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The virtio-fs virtio device provides shared file system access using
the FUSE protocol carried over virtio.
The actual file server is implemented in an external vhost-user-fs device
backend process.

Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
Signed-off-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
Message-Id: <20190930105135.27244-3-dgilbert@redhat.com>
Acked-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
This commit is contained in:
Dr. David Alan Gilbert 2019-09-30 11:51:34 +01:00 • committed by Michael S. Tsirkin
parent ddc7757d29
commit 98fc1ada4c
4 changed files with 358 additions and 0 deletions
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45
include/hw/virtio/vhost-user-fs.h Normal file
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/*
* Vhost-user filesystem virtio device
*
* Copyright 2018-2019 Red Hat, Inc.
*
* Authors:
* Stefan Hajnoczi <stefanha@redhat.com>
*
* This work is licensed under the terms of the GNU GPL, version 2 or
* (at your option) any later version. See the COPYING file in the
* top-level directory.
*/
#ifndef _QEMU_VHOST_USER_FS_H
#define _QEMU_VHOST_USER_FS_H
#include "hw/virtio/virtio.h"
#include "hw/virtio/vhost.h"
#include "hw/virtio/vhost-user.h"
#include "chardev/char-fe.h"
#define TYPE_VHOST_USER_FS "vhost-user-fs-device"
#define VHOST_USER_FS(obj) \
OBJECT_CHECK(VHostUserFS, (obj), TYPE_VHOST_USER_FS)
typedef struct {
CharBackend chardev;
char *tag;
uint16_t num_request_queues;
uint16_t queue_size;
char *vhostfd;
} VHostUserFSConf;
typedef struct {
/*< private >*/
VirtIODevice parent;
VHostUserFSConf conf;
struct vhost_virtqueue *vhost_vqs;
struct vhost_dev vhost_dev;
VhostUserState vhost_user;
/*< public >*/
} VHostUserFS;
#endif /* _QEMU_VHOST_USER_FS_H */